diff options
Diffstat (limited to 'drivers')
37 files changed, 1807 insertions, 264 deletions
diff --git a/drivers/iio/accel/st_accel.h b/drivers/iio/accel/st_accel.h index c387763..fa96460 100644 --- a/drivers/iio/accel/st_accel.h +++ b/drivers/iio/accel/st_accel.h @@ -33,8 +33,7 @@ static const struct st_sensors_platform_data default_accel_pdata = { .drdy_int_pin = 1, }; -int st_accel_common_probe(struct iio_dev *indio_dev, - struct st_sensors_platform_data *pdata); +int st_accel_common_probe(struct iio_dev *indio_dev); void st_accel_common_remove(struct iio_dev *indio_dev); #ifdef CONFIG_IIO_BUFFER diff --git a/drivers/iio/accel/st_accel_core.c b/drivers/iio/accel/st_accel_core.c index 0878648..53f3262 100644 --- a/drivers/iio/accel/st_accel_core.c +++ b/drivers/iio/accel/st_accel_core.c @@ -161,7 +161,7 @@ static const struct iio_chan_spec st_accel_16bit_channels[] = { IIO_CHAN_SOFT_TIMESTAMP(3) }; -static const struct st_sensors st_accel_sensors[] = { +static const struct st_sensor_settings st_accel_sensors_settings[] = { { .wai = ST_ACCEL_1_WAI_EXP, .sensors_supported = { @@ -457,8 +457,7 @@ static const struct iio_trigger_ops st_accel_trigger_ops = { #define ST_ACCEL_TRIGGER_OPS NULL #endif -int st_accel_common_probe(struct iio_dev *indio_dev, - struct st_sensors_platform_data *plat_data) +int st_accel_common_probe(struct iio_dev *indio_dev) { struct st_sensor_data *adata = iio_priv(indio_dev); int irq = adata->get_irq_data_ready(indio_dev); @@ -470,24 +469,25 @@ int st_accel_common_probe(struct iio_dev *indio_dev, st_sensors_power_enable(indio_dev); err = st_sensors_check_device_support(indio_dev, - ARRAY_SIZE(st_accel_sensors), st_accel_sensors); + ARRAY_SIZE(st_accel_sensors_settings), + st_accel_sensors_settings); if (err < 0) return err; adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS; - adata->multiread_bit = adata->sensor->multi_read_bit; - indio_dev->channels = adata->sensor->ch; + adata->multiread_bit = adata->sensor_settings->multi_read_bit; + indio_dev->channels = adata->sensor_settings->ch; indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; adata->current_fullscale = (struct st_sensor_fullscale_avl *) - &adata->sensor->fs.fs_avl[0]; - adata->odr = adata->sensor->odr.odr_avl[0].hz; + &adata->sensor_settings->fs.fs_avl[0]; + adata->odr = adata->sensor_settings->odr.odr_avl[0].hz; - if (!plat_data) - plat_data = + if (!adata->dev->platform_data) + adata->dev->platform_data = (struct st_sensors_platform_data *)&default_accel_pdata; - err = st_sensors_init_sensor(indio_dev, plat_data); + err = st_sensors_init_sensor(indio_dev, adata->dev->platform_data); if (err < 0) return err; diff --git a/drivers/iio/accel/st_accel_i2c.c b/drivers/iio/accel/st_accel_i2c.c index 7164aef..c7246bd 100644 --- a/drivers/iio/accel/st_accel_i2c.c +++ b/drivers/iio/accel/st_accel_i2c.c @@ -79,12 +79,11 @@ static int st_accel_i2c_probe(struct i2c_client *client, return -ENOMEM; adata = iio_priv(indio_dev); - adata->dev = &client->dev; st_sensors_of_i2c_probe(client, st_accel_of_match); st_sensors_i2c_configure(indio_dev, client, adata); - err = st_accel_common_probe(indio_dev, client->dev.platform_data); + err = st_accel_common_probe(indio_dev); if (err < 0) return err; diff --git a/drivers/iio/accel/st_accel_spi.c b/drivers/iio/accel/st_accel_spi.c index 1956396..12ec293 100644 --- a/drivers/iio/accel/st_accel_spi.c +++ b/drivers/iio/accel/st_accel_spi.c @@ -29,11 +29,10 @@ static int st_accel_spi_probe(struct spi_device *spi) return -ENOMEM; adata = iio_priv(indio_dev); - adata->dev = &spi->dev; st_sensors_spi_configure(indio_dev, spi, adata); - err = st_accel_common_probe(indio_dev, spi->dev.platform_data); + err = st_accel_common_probe(indio_dev); if (err < 0) return err; diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 88bdc8f..d0924f3 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -206,6 +206,20 @@ config NAU7802 To compile this driver as a module, choose M here: the module will be called nau7802. +config QCOM_SPMI_IADC + tristate "Qualcomm SPMI PMIC current ADC" + depends on SPMI + select REGMAP_SPMI + help + This is the IIO Current ADC driver for Qualcomm QPNP IADC Chip. + + The driver supports single mode operation to read from one of two + channels (external or internal). Hardware have additional + channels internally used for gain and offset calibration. + + To compile this driver as a module, choose M here: the module will + be called qcom-spmi-iadc. + config ROCKCHIP_SARADC tristate "Rockchip SARADC driver" depends on ARCH_ROCKCHIP || (ARM && COMPILE_TEST) diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index cb88a6a..c06718b 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -22,6 +22,7 @@ obj-$(CONFIG_MCP320X) += mcp320x.o obj-$(CONFIG_MCP3422) += mcp3422.o obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o obj-$(CONFIG_NAU7802) += nau7802.o +obj-$(CONFIG_QCOM_SPMI_IADC) += qcom-spmi-iadc.o obj-$(CONFIG_ROCKCHIP_SARADC) += rockchip_saradc.o obj-$(CONFIG_TI_ADC081C) += ti-adc081c.o obj-$(CONFIG_TI_ADC128S052) += ti-adc128s052.o diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c index 43620fd..3a2dbb3 100644 --- a/drivers/iio/adc/exynos_adc.c +++ b/drivers/iio/adc/exynos_adc.c @@ -39,6 +39,8 @@ #include <linux/iio/iio.h> #include <linux/iio/machine.h> #include <linux/iio/driver.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> /* S3C/EXYNOS4412/5250 ADC_V1 registers definitions */ #define ADC_V1_CON(x) ((x) + 0x00) @@ -90,11 +92,14 @@ #define EXYNOS_ADC_TIMEOUT (msecs_to_jiffies(100)) +#define EXYNOS_ADCV1_PHY_OFFSET 0x0718 +#define EXYNOS_ADCV2_PHY_OFFSET 0x0720 + struct exynos_adc { struct exynos_adc_data *data; struct device *dev; void __iomem *regs; - void __iomem *enable_reg; + struct regmap *pmu_map; struct clk *clk; struct clk *sclk; unsigned int irq; @@ -110,6 +115,7 @@ struct exynos_adc_data { int num_channels; bool needs_sclk; bool needs_adc_phy; + int phy_offset; u32 mask; void (*init_hw)(struct exynos_adc *info); @@ -183,7 +189,7 @@ static void exynos_adc_v1_init_hw(struct exynos_adc *info) u32 con1; if (info->data->needs_adc_phy) - writel(1, info->enable_reg); + regmap_write(info->pmu_map, info->data->phy_offset, 1); /* set default prescaler values and Enable prescaler */ con1 = ADC_V1_CON_PRSCLV(49) | ADC_V1_CON_PRSCEN; @@ -198,7 +204,7 @@ static void exynos_adc_v1_exit_hw(struct exynos_adc *info) u32 con; if (info->data->needs_adc_phy) - writel(0, info->enable_reg); + regmap_write(info->pmu_map, info->data->phy_offset, 0); con = readl(ADC_V1_CON(info->regs)); con |= ADC_V1_CON_STANDBY; @@ -225,6 +231,7 @@ static const struct exynos_adc_data exynos_adc_v1_data = { .num_channels = MAX_ADC_V1_CHANNELS, .mask = ADC_DATX_MASK, /* 12 bit ADC resolution */ .needs_adc_phy = true, + .phy_offset = EXYNOS_ADCV1_PHY_OFFSET, .init_hw = exynos_adc_v1_init_hw, .exit_hw = exynos_adc_v1_exit_hw, @@ -314,7 +321,7 @@ static void exynos_adc_v2_init_hw(struct exynos_adc *info) u32 con1, con2; if (info->data->needs_adc_phy) - writel(1, info->enable_reg); + regmap_write(info->pmu_map, info->data->phy_offset, 1); con1 = ADC_V2_CON1_SOFT_RESET; writel(con1, ADC_V2_CON1(info->regs)); @@ -332,7 +339,7 @@ static void exynos_adc_v2_exit_hw(struct exynos_adc *info) u32 con; if (info->data->needs_adc_phy) - writel(0, info->enable_reg); + regmap_write(info->pmu_map, info->data->phy_offset, 0); con = readl(ADC_V2_CON1(info->regs)); con &= ~ADC_CON_EN_START; @@ -362,6 +369,7 @@ static const struct exynos_adc_data exynos_adc_v2_data = { .num_channels = MAX_ADC_V2_CHANNELS, .mask = ADC_DATX_MASK, /* 12 bit ADC resolution */ .needs_adc_phy = true, + .phy_offset = EXYNOS_ADCV2_PHY_OFFSET, .init_hw = exynos_adc_v2_init_hw, .exit_hw = exynos_adc_v2_exit_hw, @@ -374,6 +382,7 @@ static const struct exynos_adc_data exynos3250_adc_data = { .mask = ADC_DATX_MASK, /* 12 bit ADC resolution */ .needs_sclk = true, .needs_adc_phy = true, + .phy_offset = EXYNOS_ADCV1_PHY_OFFSET, .init_hw = exynos_adc_v2_init_hw, .exit_hw = exynos_adc_v2_exit_hw, @@ -381,6 +390,35 @@ static const struct exynos_adc_data exynos3250_adc_data = { .start_conv = exynos_adc_v2_start_conv, }; +static void exynos_adc_exynos7_init_hw(struct exynos_adc *info) +{ + u32 con1, con2; + + if (info->data->needs_adc_phy) + regmap_write(info->pmu_map, info->data->phy_offset, 1); + + con1 = ADC_V2_CON1_SOFT_RESET; + writel(con1, ADC_V2_CON1(info->regs)); + + con2 = readl(ADC_V2_CON2(info->regs)); + con2 &= ~ADC_V2_CON2_C_TIME(7); + con2 |= ADC_V2_CON2_C_TIME(0); + writel(con2, ADC_V2_CON2(info->regs)); + + /* Enable interrupts */ + writel(1, ADC_V2_INT_EN(info->regs)); +} + +static const struct exynos_adc_data exynos7_adc_data = { + .num_channels = MAX_ADC_V1_CHANNELS, + .mask = ADC_DATX_MASK, /* 12 bit ADC resolution */ + + .init_hw = exynos_adc_exynos7_init_hw, + .exit_hw = exynos_adc_v2_exit_hw, + .clear_irq = exynos_adc_v2_clear_irq, + .start_conv = exynos_adc_v2_start_conv, +}; + static const struct of_device_id exynos_adc_match[] = { { .compatible = "samsung,s3c2410-adc", @@ -406,6 +444,9 @@ static const struct of_device_id exynos_adc_match[] = { }, { .compatible = "samsung,exynos3250-adc", .data = &exynos3250_adc_data, + }, { + .compatible = "samsung,exynos7-adc", + .data = &exynos7_adc_data, }, {}, }; @@ -558,10 +599,13 @@ static int exynos_adc_probe(struct platform_device *pdev) if (info->data->needs_adc_phy) { - mem = platform_get_resource(pdev, IORESOURCE_MEM, 1); - info->enable_reg = devm_ioremap_resource(&pdev->dev, mem); - if (IS_ERR(info->enable_reg)) - return PTR_ERR(info->enable_reg); + info->pmu_map = syscon_regmap_lookup_by_phandle( + pdev->dev.of_node, + "samsung,syscon-phandle"); + if (IS_ERR(info->pmu_map)) { + dev_err(&pdev->dev, "syscon regmap lookup failed.\n"); + return PTR_ERR(info->pmu_map); + } } irq = platform_get_irq(pdev, 0); diff --git a/drivers/iio/adc/mcp320x.c b/drivers/iio/adc/mcp320x.c index 28a086e..efbfd12 100644 --- a/drivers/iio/adc/mcp320x.c +++ b/drivers/iio/adc/mcp320x.c @@ -1,9 +1,30 @@ /* * Copyright (C) 2013 Oskar Andero <oskar.andero@gmail.com> + * Copyright (C) 2014 Rose Technology + * Allan Bendorff Jensen <abj@rosetechnology.dk> + * Soren Andersen <san@rosetechnology.dk> + * + * Driver for following ADC chips from Microchip Technology's: + * 10 Bit converter + * MCP3001 + * MCP3002 + * MCP3004 + * MCP3008 + * ------------ + * 12 bit converter + * MCP3201 + * MCP3202 + * MCP3204 + * MCP3208 + * ------------ * - * Driver for Microchip Technology's MCP3204 and MCP3208 ADC chips. * Datasheet can be found here: - * http://ww1.microchip.com/downloads/en/devicedoc/21298c.pdf + * http://ww1.microchip.com/downloads/en/DeviceDoc/21293C.pdf mcp3001 + * http://ww1.microchip.com/downloads/en/DeviceDoc/21294E.pdf mcp3002 + * http://ww1.microchip.com/downloads/en/DeviceDoc/21295d.pdf mcp3004/08 + * http://ww1.microchip.com/downloads/en/DeviceDoc/21290D.pdf mcp3201 + * http://ww1.microchip.com/downloads/en/DeviceDoc/21034D.pdf mcp3202 + * http://ww1.microchip.com/downloads/en/DeviceDoc/21298c.pdf mcp3204/08 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -11,19 +32,29 @@ */ #include <linux/err.h> +#include <linux/delay.h> #include <linux/spi/spi.h> #include <linux/module.h> #include <linux/iio/iio.h> #include <linux/regulator/consumer.h> -#define MCP_SINGLE_ENDED (1 << 3) -#define MCP_START_BIT (1 << 4) - enum { + mcp3001, + mcp3002, + mcp3004, + mcp3008, + mcp3201, + mcp3202, mcp3204, mcp3208, }; +struct mcp320x_chip_info { + const struct iio_chan_spec *channels; + unsigned int num_channels; + unsigned int resolution; +}; + struct mcp320x { struct spi_device *spi; struct spi_message msg; @@ -34,19 +65,69 @@ struct mcp320x { struct regulator *reg; struct mutex lock; + const struct mcp320x_chip_info *chip_info; }; -static int mcp320x_adc_conversion(struct mcp320x *adc, u8 msg) +static int mcp320x_channel_to_tx_data(int device_index, + const unsigned int channel, bool differential) +{ + int start_bit = 1; + + switch (device_index) { + case mcp3001: + case mcp3201: + return 0; + case mcp3002: + case mcp3202: + return ((start_bit << 4) | (!differential << 3) | + (channel << 2)); + case mcp3004: + case mcp3204: + case mcp3008: + case mcp3208: + return ((start_bit << 6) | (!differential << 5) | + (channel << 2)); + default: + return -EINVAL; + } +} + +static int mcp320x_adc_conversion(struct mcp320x *adc, u8 channel, + bool differential, int device_index) { int ret; - adc->tx_buf = msg; - ret = spi_sync(adc->spi, &adc->msg); - if (ret < 0) - return ret; + adc->rx_buf[0] = 0; + adc->rx_buf[1] = 0; + adc->tx_buf = mcp320x_channel_to_tx_data(device_index, + channel, differential); + + if (device_index != mcp3001 && device_index != mcp3201) { + ret = spi_sync(adc->spi, &adc->msg); + if (ret < 0) + return ret; + } else { + ret = spi_read(adc->spi, &adc->rx_buf, sizeof(adc->rx_buf)); + if (ret < 0) + return ret; + } - return ((adc->rx_buf[0] & 0x3f) << 6) | - (adc->rx_buf[1] >> 2); + switch (device_index) { + case mcp3001: + return (adc->rx_buf[0] << 5 | adc->rx_buf[1] >> 3); + case mcp3002: + case mcp3004: + case mcp3008: + return (adc->rx_buf[0] << 2 | adc->rx_buf[1] >> 6); + case mcp3201: + return (adc->rx_buf[0] << 7 | adc->rx_buf[1] >> 1); + case mcp3202: + case mcp3204: + case mcp3208: + return (adc->rx_buf[0] << 4 | adc->rx_buf[1] >> 4); + default: + return -EINVAL; + } } static int mcp320x_read_raw(struct iio_dev *indio_dev, @@ -55,18 +136,17 @@ static int mcp320x_read_raw(struct iio_dev *indio_dev, { struct mcp320x *adc = iio_priv(indio_dev); int ret = -EINVAL; + int device_index = 0; mutex_lock(&adc->lock); + device_index = spi_get_device_id(adc->spi)->driver_data; + switch (mask) { case IIO_CHAN_INFO_RAW: - if (channel->differential) - ret = mcp320x_adc_conversion(adc, - MCP_START_BIT | channel->address); - else - ret = mcp320x_adc_conversion(adc, - MCP_START_BIT | MCP_SINGLE_ENDED | - channel->address); + ret = mcp320x_adc_conversion(adc, channel->address, + channel->differential, device_index); + if (ret < 0) goto out; @@ -75,18 +155,15 @@ static int mcp320x_read_raw(struct iio_dev *indio_dev, break; case IIO_CHAN_INFO_SCALE: - /* Digital output code = (4096 * Vin) / Vref */ ret = regulator_get_voltage(adc->reg); if (ret < 0) goto out; + /* convert regulator output voltage to mV */ *val = ret / 1000; - *val2 = 12; + *val2 = adc->chip_info->resolution; ret = IIO_VAL_FRACTIONAL_LOG2; break; - - default: - break; } out: @@ -117,6 +194,16 @@ out: .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) \ } +static const struct iio_chan_spec mcp3201_channels[] = { + MCP320X_VOLTAGE_CHANNEL_DIFF(0), +}; + +static const struct iio_chan_spec mcp3202_channels[] = { + MCP320X_VOLTAGE_CHANNEL(0), + MCP320X_VOLTAGE_CHANNEL(1), + MCP320X_VOLTAGE_CHANNEL_DIFF(0), +}; + static const struct iio_chan_spec mcp3204_channels[] = { MCP320X_VOLTAGE_CHANNEL(0), MCP320X_VOLTAGE_CHANNEL(1), @@ -146,19 +233,46 @@ static const struct iio_info mcp320x_info = { .driver_module = THIS_MODULE, }; -struct mcp3208_chip_info { - const struct iio_chan_spec *channels; - unsigned int num_channels; -}; - -static const struct mcp3208_chip_info mcp3208_chip_infos[] = { +static const struct mcp320x_chip_info mcp320x_chip_infos[] = { + [mcp3001] = { + .channels = mcp3201_channels, + .num_channels = ARRAY_SIZE(mcp3201_channels), + .resolution = 10 + }, + [mcp3002] = { + .channels = mcp3202_channels, + .num_channels = ARRAY_SIZE(mcp3202_channels), + .resolution = 10 + }, + [mcp3004] = { + .channels = mcp3204_channels, + .num_channels = ARRAY_SIZE(mcp3204_channels), + .resolution = 10 + }, + [mcp3008] = { + .channels = mcp3208_channels, + .num_channels = ARRAY_SIZE(mcp3208_channels), + .resolution = 10 + }, + [mcp3201] = { + .channels = mcp3201_channels, + .num_channels = ARRAY_SIZE(mcp3201_channels), + .resolution = 12 + }, + [mcp3202] = { + .channels = mcp3202_channels, + .num_channels = ARRAY_SIZE(mcp3202_channels), + .resolution = 12 + }, [mcp3204] = { .channels = mcp3204_channels, - .num_channels = ARRAY_SIZE(mcp3204_channels) + .num_channels = ARRAY_SIZE(mcp3204_channels), + .resolution = 12 }, [mcp3208] = { .channels = mcp3208_channels, - .num_channels = ARRAY_SIZE(mcp3208_channels) + .num_channels = ARRAY_SIZE(mcp3208_channels), + .resolution = 12 }, }; @@ -166,7 +280,7 @@ static int mcp320x_probe(struct spi_device *spi) { struct iio_dev *indio_dev; struct mcp320x *adc; - const struct mcp3208_chip_info *chip_info; + const struct mcp320x_chip_info *chip_info; int ret; indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adc)); @@ -181,7 +295,7 @@ static int mcp320x_probe(struct spi_device *spi) indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &mcp320x_info; - chip_info = &mcp3208_chip_infos[spi_get_device_id(spi)->driver_data]; + chip_info = &mcp320x_chip_infos[spi_get_device_id(spi)->driver_data]; indio_dev->channels = chip_info->channels; indio_dev->num_channels = chip_info->num_channels; @@ -226,7 +340,45 @@ static int mcp320x_remove(struct spi_device *spi) return 0; } +#if defined(CONFIG_OF) +static const struct of_device_id mcp320x_dt_ids[] = { + { + .compatible = "mcp3001", + .data = &mcp320x_chip_infos[mcp3001], + }, { + .compatible = "mcp3002", + .data = &mcp320x_chip_infos[mcp3002], + }, { + .compatible = "mcp3004", + .data = &mcp320x_chip_infos[mcp3004], + }, { + .compatible = "mcp3008", + .data = &mcp320x_chip_infos[mcp3008], + }, { + .compatible = "mcp3201", + .data = &mcp320x_chip_infos[mcp3201], + }, { + .compatible = "mcp3202", + .data = &mcp320x_chip_infos[mcp3202], + }, { + .compatible = "mcp3204", + .data = &mcp320x_chip_infos[mcp3204], + }, { + .compatible = "mcp3208", + .data = &mcp320x_chip_infos[mcp3208], + }, { + } +}; +MODULE_DEVICE_TABLE(of, mcp320x_dt_ids); +#endif + static const struct spi_device_id mcp320x_id[] = { + { "mcp3001", mcp3001 }, + { "mcp3002", mcp3002 }, + { "mcp3004", mcp3004 }, + { "mcp3008", mcp3008 }, + { "mcp3201", mcp3201 }, + { "mcp3202", mcp3202 }, { "mcp3204", mcp3204 }, { "mcp3208", mcp3208 }, { } @@ -245,5 +397,5 @@ static struct spi_driver mcp320x_driver = { module_spi_driver(mcp320x_driver); MODULE_AUTHOR("Oskar Andero <oskar.andero@gmail.com>"); -MODULE_DESCRIPTION("Microchip Technology MCP3204/08"); +MODULE_DESCRIPTION("Microchip Technology MCP3x01/02/04/08"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/adc/qcom-spmi-iadc.c b/drivers/iio/adc/qcom-spmi-iadc.c new file mode 100644 index 0000000..b9666f2 --- /dev/null +++ b/drivers/iio/adc/qcom-spmi-iadc.c @@ -0,0 +1,595 @@ +/* + * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/bitops.h> +#include <linux/completion.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/iio/iio.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mutex.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +/* IADC register and bit definition */ +#define IADC_REVISION2 0x1 +#define IADC_REVISION2_SUPPORTED_IADC 1 + +#define IADC_PERPH_TYPE 0x4 +#define IADC_PERPH_TYPE_ADC 8 + +#define IADC_PERPH_SUBTYPE 0x5 +#define IADC_PERPH_SUBTYPE_IADC 3 + +#define IADC_STATUS1 0x8 +#define IADC_STATUS1_OP_MODE 4 +#define IADC_STATUS1_REQ_STS BIT(1) +#define IADC_STATUS1_EOC BIT(0) +#define IADC_STATUS1_REQ_STS_EOC_MASK 0x3 + +#define IADC_MODE_CTL 0x40 +#define IADC_OP_MODE_SHIFT 3 +#define IADC_OP_MODE_NORMAL 0 +#define IADC_TRIM_EN BIT(0) + +#define IADC_EN_CTL1 0x46 +#define IADC_EN_CTL1_SET BIT(7) + +#define IADC_CH_SEL_CTL 0x48 + +#define IADC_DIG_PARAM 0x50 +#define IADC_DIG_DEC_RATIO_SEL_SHIFT 2 + +#define IADC_HW_SETTLE_DELAY 0x51 + +#define IADC_CONV_REQ 0x52 +#define IADC_CONV_REQ_SET BIT(7) + +#define IADC_FAST_AVG_CTL 0x5a +#define IADC_FAST_AVG_EN 0x5b +#define IADC_FAST_AVG_EN_SET BIT(7) + +#define IADC_PERH_RESET_CTL3 0xda +#define IADC_FOLLOW_WARM_RB BIT(2) + +#define IADC_DATA 0x60 /* 16 bits */ + +#define IADC_SEC_ACCESS 0xd0 +#define IADC_SEC_ACCESS_DATA 0xa5 + +#define IADC_NOMINAL_RSENSE 0xf4 +#define IADC_NOMINAL_RSENSE_SIGN_MASK BIT(7) + +#define IADC_REF_GAIN_MICRO_VOLTS 17857 + +#define IADC_INT_RSENSE_DEVIATION 15625 /* nano Ohms per bit */ + +#define IADC_INT_RSENSE_IDEAL_VALUE 10000 /* micro Ohms */ +#define IADC_INT_RSENSE_DEFAULT_VALUE 7800 /* micro Ohms */ +#define IADC_INT_RSENSE_DEFAULT_GF 9000 /* micro Ohms */ +#define IADC_INT_RSENSE_DEFAULT_SMIC 9700 /* micro Ohms */ + +#define IADC_CONV_TIME_MIN_US 2000 +#define IADC_CONV_TIME_MAX_US 2100 + +#define IADC_DEF_PRESCALING 0 /* 1:1 */ +#define IADC_DEF_DECIMATION 0 /* 512 */ +#define IADC_DEF_HW_SETTLE_TIME 0 /* 0 us */ +#define IADC_DEF_AVG_SAMPLES 0 /* 1 sample */ + +/* IADC channel list */ +#define IADC_INT_RSENSE 0 +#define IADC_EXT_RSENSE 1 +#define IADC_GAIN_17P857MV 3 +#define IADC_EXT_OFFSET_CSP_CSN 5 +#define IADC_INT_OFFSET_CSP2_CSN2 6 + +/** + * struct iadc_chip - IADC Current ADC device structure. + * @regmap: regmap for register read/write. + * @dev: This device pointer. + * @base: base offset for the ADC peripheral. + * @rsense: Values of the internal and external sense resister in micro Ohms. + * @poll_eoc: Poll for end of conversion instead of waiting for IRQ. + * @offset: Raw offset values for the internal and external channels. + * @gain: Raw gain of the channels. + * @lock: ADC lock for access to the peripheral. + * @complete: ADC notification after end of conversion interrupt is received. + */ +struct iadc_chip { + struct regmap *regmap; + struct device *dev; + u16 base; + bool poll_eoc; + u32 rsense[2]; + u16 offset[2]; + u16 gain; + struct mutex lock; + struct completion complete; +}; + +static int iadc_read(struct iadc_chip *iadc, u16 offset, u8 *data) +{ + unsigned int val; + int ret; + + ret = regmap_read(iadc->regmap, iadc->base + offset, &val); + if (ret < 0) + return ret; + + *data = val; + return 0; +} + +static int iadc_write(struct iadc_chip *iadc, u16 offset, u8 data) +{ + return regmap_write(iadc->regmap, iadc->base + offset, data); +} + +static int iadc_reset(struct iadc_chip *iadc) +{ + u8 data; + int ret; + + ret = iadc_write(iadc, IADC_SEC_ACCESS, IADC_SEC_ACCESS_DATA); + if (ret < 0) + return ret; + + ret = iadc_read(iadc, IADC_PERH_RESET_CTL3, &data); + if (ret < 0) + return ret; + + ret = iadc_write(iadc, IADC_SEC_ACCESS, IADC_SEC_ACCESS_DATA); + if (ret < 0) + return ret; + + data |= IADC_FOLLOW_WARM_RB; + + return iadc_write(iadc, IADC_PERH_RESET_CTL3, data); +} + +static int iadc_set_state(struct iadc_chip *iadc, bool state) +{ + return iadc_write(iadc, IADC_EN_CTL1, state ? IADC_EN_CTL1_SET : 0); +} + +static void iadc_status_show(struct iadc_chip *iadc) +{ + u8 mode, sta1, chan, dig, en, req; + int ret; + + ret = iadc_read(iadc, IADC_MODE_CTL, &mode); + if (ret < 0) + return; + + ret = iadc_read(iadc, IADC_DIG_PARAM, &dig); + if (ret < 0) + return; + + ret = iadc_read(iadc, IADC_CH_SEL_CTL, &chan); + if (ret < 0) + return; + + ret = iadc_read(iadc, IADC_CONV_REQ, &req); + if (ret < 0) + return; + + ret = iadc_read(iadc, IADC_STATUS1, &sta1); + if (ret < 0) + return; + + ret = iadc_read(iadc, IADC_EN_CTL1, &en); + if (ret < 0) + return; + + dev_err(iadc->dev, + "mode:%02x en:%02x chan:%02x dig:%02x req:%02x sta1:%02x\n", + mode, en, chan, dig, req, sta1); +} + +static int iadc_configure(struct iadc_chip *iadc, int channel) +{ + u8 decim, mode; + int ret; + + /* Mode selection */ + mode = (IADC_OP_MODE_NORMAL << IADC_OP_MODE_SHIFT) | IADC_TRIM_EN; + ret = iadc_write(iadc, IADC_MODE_CTL, mode); + if (ret < 0) + return ret; + + /* Channel selection */ + ret = iadc_write(iadc, IADC_CH_SEL_CTL, channel); + if (ret < 0) + return ret; + + /* Digital parameter setup */ + decim = IADC_DEF_DECIMATION << IADC_DIG_DEC_RATIO_SEL_SHIFT; + ret = iadc_write(iadc, IADC_DIG_PARAM, decim); + if (ret < 0) + return ret; + + /* HW settle time delay */ + ret = iadc_write(iadc, IADC_HW_SETTLE_DELAY, IADC_DEF_HW_SETTLE_TIME); + if (ret < 0) + return ret; + + ret = iadc_write(iadc, IADC_FAST_AVG_CTL, IADC_DEF_AVG_SAMPLES); + if (ret < 0) + return ret; + + if (IADC_DEF_AVG_SAMPLES) + ret = iadc_write(iadc, IADC_FAST_AVG_EN, IADC_FAST_AVG_EN_SET); + else + ret = iadc_write(iadc, IADC_FAST_AVG_EN, 0); + + if (ret < 0) + return ret; + + if (!iadc->poll_eoc) + reinit_completion(&iadc->complete); + + ret = iadc_set_state(iadc, true); + if (ret < 0) + return ret; + + /* Request conversion */ + return iadc_write(iadc, IADC_CONV_REQ, IADC_CONV_REQ_SET); +} + +static int iadc_poll_wait_eoc(struct iadc_chip *iadc, unsigned int interval_us) +{ + unsigned int count, retry; + int ret; + u8 sta1; + + retry = interval_us / IADC_CONV_TIME_MIN_US; + + for (count = 0; count < retry; count++) { + ret = iadc_read(iadc, IADC_STATUS1, &sta1); + if (ret < 0) + return ret; + + sta1 &= IADC_STATUS1_REQ_STS_EOC_MASK; + if (sta1 == IADC_STATUS1_EOC) + return 0; + + usleep_range(IADC_CONV_TIME_MIN_US, IADC_CONV_TIME_MAX_US); + } + + iadc_status_show(iadc); + + return -ETIMEDOUT; +} + +static int iadc_read_result(struct iadc_chip *iadc, u16 *data) +{ + return regmap_bulk_read(iadc->regmap, iadc->base + IADC_DATA, data, 2); +} + +static int iadc_do_conversion(struct iadc_chip *iadc, int chan, u16 *data) +{ + unsigned int wait; + int ret; + + ret = iadc_configure(iadc, chan); + if (ret < 0) + goto exit; + + wait = BIT(IADC_DEF_AVG_SAMPLES) * IADC_CONV_TIME_MIN_US * 2; + + if (iadc->poll_eoc) { + ret = iadc_poll_wait_eoc(iadc, wait); + } else { + ret = wait_for_completion_timeout(&iadc->complete, wait); + if (!ret) + ret = -ETIMEDOUT; + else + /* double check conversion status */ + ret = iadc_poll_wait_eoc(iadc, IADC_CONV_TIME_MIN_US); + } + + if (!ret) + ret = iadc_read_result(iadc, data); +exit: + iadc_set_state(iadc, false); + if (ret < 0) + dev_err(iadc->dev, "conversion failed\n"); + + return ret; +} + +static int iadc_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct iadc_chip *iadc = iio_priv(indio_dev); + s32 isense_ua, vsense_uv; + u16 adc_raw, vsense_raw; + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + mutex_lock(&iadc->lock); + ret = iadc_do_conversion(iadc, chan->channel, &adc_raw); + mutex_unlock(&iadc->lock); + if (ret < 0) + return ret; + + vsense_raw = adc_raw - iadc->offset[chan->channel]; + + vsense_uv = vsense_raw * IADC_REF_GAIN_MICRO_VOLTS; + vsense_uv /= (s32)iadc->gain - iadc->offset[chan->channel]; + + isense_ua = vsense_uv / iadc->rsense[chan->channel]; + + dev_dbg(iadc->dev, "off %d gain %d adc %d %duV I %duA\n", + iadc->offset[chan->channel], iadc->gain, + adc_raw, vsense_uv, isense_ua); + + *val = isense_ua; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + *val = 0; + *val2 = 1000; + return IIO_VAL_INT_PLUS_MICRO; + } + + return -EINVAL; +} + +static const struct iio_info iadc_info = { + .read_raw = iadc_read_raw, + .driver_module = THIS_MODULE, +}; + +static irqreturn_t iadc_isr(int irq, void *dev_id) +{ + struct iadc_chip *iadc = dev_id; + + complete(&iadc->complete); + + return IRQ_HANDLED; +} + +static int iadc_update_offset(struct iadc_chip *iadc) +{ + int ret; + + ret = iadc_do_conversion(iadc, IADC_GAIN_17P857MV, &iadc->gain); + if (ret < 0) + return ret; + + ret = iadc_do_conversion(iadc, IADC_INT_OFFSET_CSP2_CSN2, + &iadc->offset[IADC_INT_RSENSE]); + if (ret < 0) + return ret; + + if (iadc->gain == iadc->offset[IADC_INT_RSENSE]) { + dev_err(iadc->dev, "error: internal offset == gain %d\n", + iadc->gain); + return -EINVAL; + } + + ret = iadc_do_conversion(iadc, IADC_EXT_OFFSET_CSP_CSN, + &iadc->offset[IADC_EXT_RSENSE]); + if (ret < 0) + return ret; + + if (iadc->gain == iadc->offset[IADC_EXT_RSENSE]) { + dev_err(iadc->dev, "error: external offset == gain %d\n", + iadc->gain); + return -EINVAL; + } + + return 0; +} + +static int iadc_version_check(struct iadc_chip *iadc) +{ + u8 val; + int ret; + + ret = iadc_read(iadc, IADC_PERPH_TYPE, &val); + if (ret < 0) + return ret; + + if (val < IADC_PERPH_TYPE_ADC) { + dev_err(iadc->dev, "%d is not ADC\n", val); + return -EINVAL; + } + + ret = iadc_read(iadc, IADC_PERPH_SUBTYPE, &val); + if (ret < 0) + return ret; + + if (val < IADC_PERPH_SUBTYPE_IADC) { + dev_err(iadc->dev, "%d is not IADC\n", val); + return -EINVAL; + } + + ret = iadc_read(iadc, IADC_REVISION2, &val); + if (ret < 0) + return ret; + + if (val < IADC_REVISION2_SUPPORTED_IADC) { + dev_err(iadc->dev, "revision %d not supported\n", val); + return -EINVAL; + } + + return 0; +} + +static int iadc_rsense_read(struct iadc_chip *iadc, struct device_node *node) +{ + int ret, sign, int_sense; + u8 deviation; + + ret = of_property_read_u32(node, "qcom,external-resistor-micro-ohms", + &iadc->rsense[IADC_EXT_RSENSE]); + if (ret < 0) + iadc->rsense[IADC_EXT_RSENSE] = IADC_INT_RSENSE_IDEAL_VALUE; + + if (!iadc->rsense[IADC_EXT_RSENSE]) { + dev_err(iadc->dev, "external resistor can't be zero Ohms"); + return -EINVAL; + } + + ret = iadc_read(iadc, IADC_NOMINAL_RSENSE, &deviation); + if (ret < 0) + return ret; + + /* + * Deviation value stored is an offset from 10 mili Ohms, bit 7 is + * the sign, the remaining bits have an LSB of 15625 nano Ohms. + */ + sign = (deviation & IADC_NOMINAL_RSENSE_SIGN_MASK) ? -1 : 1; + + deviation &= ~IADC_NOMINAL_RSENSE_SIGN_MASK; + + /* Scale it to nono Ohms */ + int_sense = IADC_INT_RSENSE_IDEAL_VALUE * 1000; + int_sense += sign * deviation * IADC_INT_RSENSE_DEVIATION; + int_sense /= 1000; /* micro Ohms */ + + iadc->rsense[IADC_INT_RSENSE] = int_sense; + return 0; +} + +static const struct iio_chan_spec iadc_channels[] = { + { + .type = IIO_CURRENT, + .datasheet_name = "INTERNAL_RSENSE", + .channel = 0, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + .indexed = 1, + }, + { + .type = IIO_CURRENT, + .datasheet_name = "EXTERNAL_RSENSE", + .channel = 1, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + .indexed = 1, + }, +}; + +static int iadc_probe(struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + struct device *dev = &pdev->dev; + struct iio_dev *indio_dev; + struct iadc_chip *iadc; + int ret, irq_eoc; + u32 res; + + indio_dev = devm_iio_device_alloc(dev, sizeof(*iadc)); + if (!indio_dev) + return -ENOMEM; + + iadc = iio_priv(indio_dev); + iadc->dev = dev; + + iadc->regmap = dev_get_regmap(dev->parent, NULL); + if (!iadc->regmap) + return -ENODEV; + + init_completion(&iadc->complete); + mutex_init(&iadc->lock); + + ret = of_property_read_u32(node, "reg", &res); + if (ret < 0) + return -ENODEV; + + iadc->base = res; + + ret = iadc_version_check(iadc); + if (ret < 0) + return -ENODEV; + + ret = iadc_rsense_read(iadc, node); + if (ret < 0) + return -ENODEV; + + dev_dbg(iadc->dev, "sense resistors %d and %d micro Ohm\n", + iadc->rsense[IADC_INT_RSENSE], + iadc->rsense[IADC_EXT_RSENSE]); + + irq_eoc = platform_get_irq(pdev, 0); + if (irq_eoc == -EPROBE_DEFER) + return irq_eoc; + + if (irq_eoc < 0) + iadc->poll_eoc = true; + + ret = iadc_reset(iadc); + if (ret < 0) { + dev_err(dev, "reset failed\n"); + return ret; + } + + if (!iadc->poll_eoc) { + ret = devm_request_irq(dev, irq_eoc, iadc_isr, 0, + "spmi-iadc", iadc); + if (!ret) + enable_irq_wake(irq_eoc); + else + return ret; + } else { + device_init_wakeup(iadc->dev, 1); + } + + ret = iadc_update_offset(iadc); + if (ret < 0) { + dev_err(dev, "failed offset calibration\n"); + return ret; + } + + indio_dev->dev.parent = dev; + indio_dev->dev.of_node = node; + indio_dev->name = pdev->name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &iadc_info; + indio_dev->channels = iadc_channels; + indio_dev->num_channels = ARRAY_SIZE(iadc_channels); + + return devm_iio_device_register(dev, indio_dev); +} + +static const struct of_device_id iadc_match_table[] = { + { .compatible = "qcom,spmi-iadc" }, + { } +}; + +MODULE_DEVICE_TABLE(of, iadc_match_table); + +static struct platform_driver iadc_driver = { + .driver = { + .name = "qcom-spmi-iadc", + .of_match_table = iadc_match_table, + }, + .probe = iadc_probe, +}; + +module_platform_driver(iadc_driver); + +MODULE_ALIAS("platform:qcom-spmi-iadc"); +MODULE_DESCRIPTION("Qualcomm SPMI PMIC current ADC driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>"); diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c index e074a0b..b546bc1 100644 --- a/drivers/iio/adc/rockchip_saradc.c +++ b/drivers/iio/adc/rockchip_saradc.c @@ -18,13 +18,13 @@ #include <linux/interrupt.h> #include <linux/io.h> #include <linux/of.h> +#include <linux/of_device.h> #include <linux/clk.h> #include <linux/completion.h> #include <linux/regulator/consumer.h> #include <linux/iio/iio.h> #define SARADC_DATA 0x00 -#define SARADC_DATA_MASK 0x3ff #define SARADC_STAS 0x04 #define SARADC_STAS_BUSY BIT(0) @@ -38,15 +38,22 @@ #define SARADC_DLY_PU_SOC 0x0c #define SARADC_DLY_PU_SOC_MASK 0x3f -#define SARADC_BITS 10 #define SARADC_TIMEOUT msecs_to_jiffies(100) +struct rockchip_saradc_data { + int num_bits; + const struct iio_chan_spec *channels; + int num_channels; + unsigned long clk_rate; +}; + struct rockchip_saradc { void __iomem *regs; struct clk *pclk; struct clk *clk; struct completion completion; struct regulator *vref; + const struct rockchip_saradc_data *data; u16 last_val; }; @@ -90,7 +97,7 @@ static int rockchip_saradc_read_raw(struct iio_dev *indio_dev, } *val = ret / 1000; - *val2 = SARADC_BITS; + *val2 = info->data->num_bits; return IIO_VAL_FRACTIONAL_LOG2; default: return -EINVAL; @@ -103,7 +110,7 @@ static irqreturn_t rockchip_saradc_isr(int irq, void *dev_id) /* Read value */ info->last_val = readl_relaxed(info->regs + SARADC_DATA); - info->last_val &= SARADC_DATA_MASK; + info->last_val &= GENMASK(info->data->num_bits - 1, 0); /* Clear irq & power down adc */ writel_relaxed(0, info->regs + SARADC_CTRL); @@ -133,12 +140,44 @@ static const struct iio_chan_spec rockchip_saradc_iio_channels[] = { ADC_CHANNEL(2, "adc2"), }; +static const struct rockchip_saradc_data saradc_data = { + .num_bits = 10, + .channels = rockchip_saradc_iio_channels, + .num_channels = ARRAY_SIZE(rockchip_saradc_iio_channels), + .clk_rate = 1000000, +}; + +static const struct iio_chan_spec rockchip_rk3066_tsadc_iio_channels[] = { + ADC_CHANNEL(0, "adc0"), + ADC_CHANNEL(1, "adc1"), +}; + +static const struct rockchip_saradc_data rk3066_tsadc_data = { + .num_bits = 12, + .channels = rockchip_rk3066_tsadc_iio_channels, + .num_channels = ARRAY_SIZE(rockchip_rk3066_tsadc_iio_channels), + .clk_rate = 50000, +}; + +static const struct of_device_id rockchip_saradc_match[] = { + { + .compatible = "rockchip,saradc", + .data = &saradc_data, + }, { + .compatible = "rockchip,rk3066-tsadc", + .data = &rk3066_tsadc_data, + }, + {}, +}; +MODULE_DEVICE_TABLE(of, rockchip_saradc_match); + static int rockchip_saradc_probe(struct platform_device *pdev) { struct rockchip_saradc *info = NULL; struct device_node *np = pdev->dev.of_node; struct iio_dev *indio_dev = NULL; struct resource *mem; + const struct of_device_id *match; int ret; int irq; @@ -152,6 +191,9 @@ static int rockchip_saradc_probe(struct platform_device *pdev) } info = iio_priv(indio_dev); + match = of_match_device(rockchip_saradc_match, &pdev->dev); + info->data = match->data; + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); info->regs = devm_ioremap_resource(&pdev->dev, mem); if (IS_ERR(info->regs)) @@ -192,10 +234,10 @@ static int rockchip_saradc_probe(struct platform_device *pdev) } /* - * Use a default of 1MHz for the converter clock. + * Use a default value for the converter clock. * This may become user-configurable in the future. */ - ret = clk_set_rate(info->clk, 1000000); + ret = clk_set_rate(info->clk, info->data->clk_rate); if (ret < 0) { dev_err(&pdev->dev, "failed to set adc clk rate, %d\n", ret); return ret; @@ -227,8 +269,8 @@ static int rockchip_saradc_probe(struct platform_device *pdev) indio_dev->info = &rockchip_saradc_iio_info; indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->channels = rockchip_saradc_iio_channels; - indio_dev->num_channels = ARRAY_SIZE(rockchip_saradc_iio_channels); + indio_dev->channels = info->data->channels; + indio_dev->num_channels = info->data->num_channels; ret = iio_device_register(indio_dev); if (ret) @@ -296,12 +338,6 @@ static int rockchip_saradc_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(rockchip_saradc_pm_ops, rockchip_saradc_suspend, rockchip_saradc_resume); -static const struct of_device_id rockchip_saradc_match[] = { - { .compatible = "rockchip,saradc" }, - {}, -}; -MODULE_DEVICE_TABLE(of, rockchip_saradc_match); - static struct platform_driver rockchip_saradc_driver = { .probe = rockchip_saradc_probe, .remove = rockchip_saradc_remove, diff --git a/drivers/iio/adc/vf610_adc.c b/drivers/iio/adc/vf610_adc.c index 4a10ae9..8ec353c 100644 --- a/drivers/iio/adc/vf610_adc.c +++ b/drivers/iio/adc/vf610_adc.c @@ -91,7 +91,7 @@ #define VF610_ADC_CAL 0x80 /* Other field define */ -#define VF610_ADC_ADCHC(x) ((x) & 0xF) +#define VF610_ADC_ADCHC(x) ((x) & 0x1F) #define VF610_ADC_AIEN (0x1 << 7) #define VF610_ADC_CONV_DISABLE 0x1F #define VF610_ADC_HS_COCO0 0x1 @@ -153,6 +153,12 @@ struct vf610_adc { BIT(IIO_CHAN_INFO_SAMP_FREQ), \ } +#define VF610_ADC_TEMPERATURE_CHAN(_idx, _chan_type) { \ + .type = (_chan_type), \ + .channel = (_idx), \ + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \ +} + static const struct iio_chan_spec vf610_adc_iio_channels[] = { VF610_ADC_CHAN(0, IIO_VOLTAGE), VF610_ADC_CHAN(1, IIO_VOLTAGE), @@ -170,6 +176,7 @@ static const struct iio_chan_spec vf610_adc_iio_channels[] = { VF610_ADC_CHAN(13, IIO_VOLTAGE), VF610_ADC_CHAN(14, IIO_VOLTAGE), VF610_ADC_CHAN(15, IIO_VOLTAGE), + VF610_ADC_TEMPERATURE_CHAN(26, IIO_TEMP), /* sentinel */ }; @@ -451,6 +458,7 @@ static int vf610_read_raw(struct iio_dev *indio_dev, switch (mask) { case IIO_CHAN_INFO_RAW: + case IIO_CHAN_INFO_PROCESSED: mutex_lock(&indio_dev->mlock); reinit_completion(&info->completion); @@ -468,7 +476,23 @@ static int vf610_read_raw(struct iio_dev *indio_dev, return ret; } - *val = info->value; + switch (chan->type) { + case IIO_VOLTAGE: + *val = info->value; + break; + case IIO_TEMP: + /* + * Calculate in degree Celsius times 1000 + * Using sensor slope of 1.84 mV/°C and + * V at 25°C of 696 mV + */ + *val = 25000 - ((int)info->value - 864) * 1000000 / 1840; + break; + default: + mutex_unlock(&indio_dev->mlock); + return -EINVAL; + } + mutex_unlock(&indio_dev->mlock); return IIO_VAL_INT; @@ -569,9 +593,9 @@ static int vf610_adc_probe(struct platform_device *pdev) return PTR_ERR(info->regs); irq = platform_get_irq(pdev, 0); - if (irq <= 0) { + if (irq < 0) { dev_err(&pdev->dev, "no irq resource?\n"); - return -EINVAL; + return irq; } ret = devm_request_irq(info->dev, irq, @@ -586,8 +610,7 @@ static int vf610_adc_probe(struct platform_device *pdev) if (IS_ERR(info->clk)) { dev_err(&pdev->dev, "failed getting clock, err = %ld\n", PTR_ERR(info->clk)); - ret = PTR_ERR(info->clk); - return ret; + return PTR_ERR(info->clk); } info->vref = devm_regulator_get(&pdev->dev, "vref"); @@ -681,17 +704,19 @@ static int vf610_adc_resume(struct device *dev) ret = clk_prepare_enable(info->clk); if (ret) - return ret; + goto disable_reg; vf610_adc_hw_init(info); return 0; + +disable_reg: + regulator_disable(info->vref); + return ret; } #endif -static SIMPLE_DEV_PM_OPS(vf610_adc_pm_ops, - vf610_adc_suspend, - vf610_adc_resume); +static SIMPLE_DEV_PM_OPS(vf610_adc_pm_ops, vf610_adc_suspend, vf610_adc_resume); static struct platform_driver vf610_adc_driver = { .probe = vf610_adc_probe, diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c index 24cfe4e..edd13d2 100644 --- a/drivers/iio/common/st_sensors/st_sensors_core.c +++ b/drivers/iio/common/st_sensors/st_sensors_core.c @@ -44,18 +44,18 @@ st_sensors_write_data_with_mask_error: return err; } -static int st_sensors_match_odr(struct st_sensors *sensor, +static int st_sensors_match_odr(struct st_sensor_settings *sensor_settings, unsigned int odr, struct st_sensor_odr_avl *odr_out) { int i, ret = -EINVAL; for (i = 0; i < ST_SENSORS_ODR_LIST_MAX; i++) { - if (sensor->odr.odr_avl[i].hz == 0) + if (sensor_settings->odr.odr_avl[i].hz == 0) goto st_sensors_match_odr_error; - if (sensor->odr.odr_avl[i].hz == odr) { - odr_out->hz = sensor->odr.odr_avl[i].hz; - odr_out->value = sensor->odr.odr_avl[i].value; + if (sensor_settings->odr.odr_avl[i].hz == odr) { + odr_out->hz = sensor_settings->odr.odr_avl[i].hz; + odr_out->value = sensor_settings->odr.odr_avl[i].value; ret = 0; break; } @@ -71,23 +71,26 @@ int st_sensors_set_odr(struct iio_dev *indio_dev, unsigned int odr) struct st_sensor_odr_avl odr_out = {0, 0}; struct st_sensor_data *sdata = iio_priv(indio_dev); - err = st_sensors_match_odr(sdata->sensor, odr, &odr_out); + err = st_sensors_match_odr(sdata->sensor_settings, odr, &odr_out); if (err < 0) goto st_sensors_match_odr_error; - if ((sdata->sensor->odr.addr == sdata->sensor->pw.addr) && - (sdata->sensor->odr.mask == sdata->sensor->pw.mask)) { + if ((sdata->sensor_settings->odr.addr == + sdata->sensor_settings->pw.addr) && + (sdata->sensor_settings->odr.mask == + sdata->sensor_settings->pw.mask)) { if (sdata->enabled == true) { err = st_sensors_write_data_with_mask(indio_dev, - sdata->sensor->odr.addr, - sdata->sensor->odr.mask, + sdata->sensor_settings->odr.addr, + sdata->sensor_settings->odr.mask, odr_out.value); } else { err = 0; } } else { err = st_sensors_write_data_with_mask(indio_dev, - sdata->sensor->odr.addr, sdata->sensor->odr.mask, + sdata->sensor_settings->odr.addr, + sdata->sensor_settings->odr.mask, odr_out.value); } if (err >= 0) @@ -98,16 +101,16 @@ st_sensors_match_odr_error: } EXPORT_SYMBOL(st_sensors_set_odr); -static int st_sensors_match_fs(struct st_sensors *sensor, +static int st_sensors_match_fs(struct st_sensor_settings *sensor_settings, unsigned int fs, int *index_fs_avl) { int i, ret = -EINVAL; for (i = 0; i < ST_SENSORS_FULLSCALE_AVL_MAX; i++) { - if (sensor->fs.fs_avl[i].num == 0) + if (sensor_settings->fs.fs_avl[i].num == 0) goto st_sensors_match_odr_error; - if (sensor->fs.fs_avl[i].num == fs) { + if (sensor_settings->fs.fs_avl[i].num == fs) { *index_fs_avl = i; ret = 0; break; @@ -118,25 +121,24 @@ st_sensors_match_odr_error: return ret; } -static int st_sensors_set_fullscale(struct iio_dev *indio_dev, - unsigned int fs) +static int st_sensors_set_fullscale(struct iio_dev *indio_dev, unsigned int fs) { int err, i = 0; struct st_sensor_data *sdata = iio_priv(indio_dev); - err = st_sensors_match_fs(sdata->sensor, fs, &i); + err = st_sensors_match_fs(sdata->sensor_settings, fs, &i); if (err < 0) goto st_accel_set_fullscale_error; err = st_sensors_write_data_with_mask(indio_dev, - sdata->sensor->fs.addr, - sdata->sensor->fs.mask, - sdata->sensor->fs.fs_avl[i].value); + sdata->sensor_settings->fs.addr, + sdata->sensor_settings->fs.mask, + sdata->sensor_settings->fs.fs_avl[i].value); if (err < 0) goto st_accel_set_fullscale_error; sdata->current_fullscale = (struct st_sensor_fullscale_avl *) - &sdata->sensor->fs.fs_avl[i]; + &sdata->sensor_settings->fs.fs_avl[i]; return err; st_accel_set_fullscale_error: @@ -153,10 +155,12 @@ int st_sensors_set_enable(struct iio_dev *indio_dev, bool enable) struct st_sensor_data *sdata = iio_priv(indio_dev); if (enable) { - tmp_value = sdata->sensor->pw.value_on; - if ((sdata->sensor->odr.addr == sdata->sensor->pw.addr) && - (sdata->sensor->odr.mask == sdata->sensor->pw.mask)) { - err = st_sensors_match_odr(sdata->sensor, + tmp_value = sdata->sensor_settings->pw.value_on; + if ((sdata->sensor_settings->odr.addr == + sdata->sensor_settings->pw.addr) && + (sdata->sensor_settings->odr.mask == + sdata->sensor_settings->pw.mask)) { + err = st_sensors_match_odr(sdata->sensor_settings, sdata->odr, &odr_out); if (err < 0) goto set_enable_error; @@ -164,8 +168,8 @@ int st_sensors_set_enable(struct iio_dev *indio_dev, bool enable) found = true; } err = st_sensors_write_data_with_mask(indio_dev, - sdata->sensor->pw.addr, - sdata->sensor->pw.mask, tmp_value); + sdata->sensor_settings->pw.addr, + sdata->sensor_settings->pw.mask, tmp_value); if (err < 0) goto set_enable_error; @@ -175,9 +179,9 @@ int st_sensors_set_enable(struct iio_dev *indio_dev, bool enable) sdata->odr = odr_out.hz; } else { err = st_sensors_write_data_with_mask(indio_dev, - sdata->sensor->pw.addr, - sdata->sensor->pw.mask, - sdata->sensor->pw.value_off); + sdata->sensor_settings->pw.addr, + sdata->sensor_settings->pw.mask, + sdata->sensor_settings->pw.value_off); if (err < 0) goto set_enable_error; @@ -194,8 +198,9 @@ int st_sensors_set_axis_enable(struct iio_dev *indio_dev, u8 axis_enable) struct st_sensor_data *sdata = iio_priv(indio_dev); return st_sensors_write_data_with_mask(indio_dev, - sdata->sensor->enable_axis.addr, - sdata->sensor->enable_axis.mask, axis_enable); + sdata->sensor_settings->enable_axis.addr, + sdata->sensor_settings->enable_axis.mask, + axis_enable); } EXPORT_SYMBOL(st_sensors_set_axis_enable); @@ -236,13 +241,13 @@ void st_sensors_power_disable(struct iio_dev *indio_dev) EXPORT_SYMBOL(st_sensors_power_disable); static int st_sensors_set_drdy_int_pin(struct iio_dev *indio_dev, - struct st_sensors_platform_data *pdata) + struct st_sensors_platform_data *pdata) { struct st_sensor_data *sdata = iio_priv(indio_dev); switch (pdata->drdy_int_pin) { case 1: - if (sdata->sensor->drdy_irq.mask_int1 == 0) { + if (sdata->sensor_settings->drdy_irq.mask_int1 == 0) { dev_err(&indio_dev->dev, "DRDY on INT1 not available.\n"); return -EINVAL; @@ -250,7 +255,7 @@ static int st_sensors_set_drdy_int_pin(struct iio_dev *indio_dev, sdata->drdy_int_pin = 1; break; case 2: - if (sdata->sensor->drdy_irq.mask_int2 == 0) { + if (sdata->sensor_settings->drdy_irq.mask_int2 == 0) { dev_err(&indio_dev->dev, "DRDY on INT2 not available.\n"); return -EINVAL; @@ -318,7 +323,7 @@ int st_sensors_init_sensor(struct iio_dev *indio_dev, if (sdata->current_fullscale) { err = st_sensors_set_fullscale(indio_dev, - sdata->current_fullscale->num); + sdata->current_fullscale->num); if (err < 0) return err; } else @@ -330,7 +335,8 @@ int st_sensors_init_sensor(struct iio_dev *indio_dev, /* set BDU */ err = st_sensors_write_data_with_mask(indio_dev, - sdata->sensor->bdu.addr, sdata->sensor->bdu.mask, true); + sdata->sensor_settings->bdu.addr, + sdata->sensor_settings->bdu.mask, true); if (err < 0) return err; @@ -346,26 +352,28 @@ int st_sensors_set_dataready_irq(struct iio_dev *indio_dev, bool enable) u8 drdy_mask; struct st_sensor_data *sdata = iio_priv(indio_dev); - if (!sdata->sensor->drdy_irq.addr) + if (!sdata->sensor_settings->drdy_irq.addr) return 0; /* Enable/Disable the interrupt generator 1. */ - if (sdata->sensor->drdy_irq.ig1.en_addr > 0) { + if (sdata->sensor_settings->drdy_irq.ig1.en_addr > 0) { err = st_sensors_write_data_with_mask(indio_dev, - sdata->sensor->drdy_irq.ig1.en_addr, - sdata->sensor->drdy_irq.ig1.en_mask, (int)enable); + sdata->sensor_settings->drdy_irq.ig1.en_addr, + sdata->sensor_settings->drdy_irq.ig1.en_mask, + (int)enable); if (err < 0) goto st_accel_set_dataready_irq_error; } if (sdata->drdy_int_pin == 1) - drdy_mask = sdata->sensor->drdy_irq.mask_int1; + drdy_mask = sdata->sensor_settings->drdy_irq.mask_int1; else - drdy_mask = sdata->sensor->drdy_irq.mask_int2; + drdy_mask = sdata->sensor_settings->drdy_irq.mask_int2; /* Enable/Disable the interrupt generator for data ready. */ err = st_sensors_write_data_with_mask(indio_dev, - sdata->sensor->drdy_irq.addr, drdy_mask, (int)enable); + sdata->sensor_settings->drdy_irq.addr, + drdy_mask, (int)enable); st_accel_set_dataready_irq_error: return err; @@ -378,8 +386,8 @@ int st_sensors_set_fullscale_by_gain(struct iio_dev *indio_dev, int scale) struct st_sensor_data *sdata = iio_priv(indio_dev); for (i = 0; i < ST_SENSORS_FULLSCALE_AVL_MAX; i++) { - if ((sdata->sensor->fs.fs_avl[i].gain == scale) && - (sdata->sensor->fs.fs_avl[i].gain != 0)) { + if ((sdata->sensor_settings->fs.fs_avl[i].gain == scale) && + (sdata->sensor_settings->fs.fs_avl[i].gain != 0)) { err = 0; break; } @@ -388,7 +396,7 @@ int st_sensors_set_fullscale_by_gain(struct iio_dev *indio_dev, int scale) goto st_sensors_match_scale_error; err = st_sensors_set_fullscale(indio_dev, - sdata->sensor->fs.fs_avl[i].num); + sdata->sensor_settings->fs.fs_avl[i].num); st_sensors_match_scale_error: return err; @@ -439,7 +447,7 @@ int st_sensors_read_info_raw(struct iio_dev *indio_dev, if (err < 0) goto out; - msleep((sdata->sensor->bootime * 1000) / sdata->odr); + msleep((sdata->sensor_settings->bootime * 1000) / sdata->odr); err = st_sensors_read_axis_data(indio_dev, ch, val); if (err < 0) goto out; @@ -456,7 +464,8 @@ out: EXPORT_SYMBOL(st_sensors_read_info_raw); int st_sensors_check_device_support(struct iio_dev *indio_dev, - int num_sensors_list, const struct st_sensors *sensors) + int num_sensors_list, + const struct st_sensor_settings *sensor_settings) { u8 wai; int i, n, err; @@ -470,23 +479,24 @@ int st_sensors_check_device_support(struct iio_dev *indio_dev, } for (i = 0; i < num_sensors_list; i++) { - if (sensors[i].wai == wai) + if (sensor_settings[i].wai == wai) break; } if (i == num_sensors_list) goto device_not_supported; - for (n = 0; n < ARRAY_SIZE(sensors[i].sensors_supported); n++) { + for (n = 0; n < ARRAY_SIZE(sensor_settings[i].sensors_supported); n++) { if (strcmp(indio_dev->name, - &sensors[i].sensors_supported[n][0]) == 0) + &sensor_settings[i].sensors_supported[n][0]) == 0) break; } - if (n == ARRAY_SIZE(sensors[i].sensors_supported)) { + if (n == ARRAY_SIZE(sensor_settings[i].sensors_supported)) { dev_err(&indio_dev->dev, "device name and WhoAmI mismatch.\n"); goto sensor_name_mismatch; } - sdata->sensor = (struct st_sensors *)&sensors[i]; + sdata->sensor_settings = + (struct st_sensor_settings *)&sensor_settings[i]; return i; @@ -508,11 +518,11 @@ ssize_t st_sensors_sysfs_sampling_frequency_avail(struct device *dev, mutex_lock(&indio_dev->mlock); for (i = 0; i < ST_SENSORS_ODR_LIST_MAX; i++) { - if (sdata->sensor->odr.odr_avl[i].hz == 0) + if (sdata->sensor_settings->odr.odr_avl[i].hz == 0) break; len += scnprintf(buf + len, PAGE_SIZE - len, "%d ", - sdata->sensor->odr.odr_avl[i].hz); + sdata->sensor_settings->odr.odr_avl[i].hz); } mutex_unlock(&indio_dev->mlock); buf[len - 1] = '\n'; @@ -530,11 +540,11 @@ ssize_t st_sensors_sysfs_scale_avail(struct device *dev, mutex_lock(&indio_dev->mlock); for (i = 0; i < ST_SENSORS_FULLSCALE_AVL_MAX; i++) { - if (sdata->sensor->fs.fs_avl[i].num == 0) + if (sdata->sensor_settings->fs.fs_avl[i].num == 0) break; len += scnprintf(buf + len, PAGE_SIZE - len, "0.%06u ", - sdata->sensor->fs.fs_avl[i].gain); + sdata->sensor_settings->fs.fs_avl[i].gain); } mutex_unlock(&indio_dev->mlock); buf[len - 1] = '\n'; diff --git a/drivers/iio/common/st_sensors/st_sensors_i2c.c b/drivers/iio/common/st_sensors/st_sensors_i2c.c index bb6f308..98cfee29 100644 --- a/drivers/iio/common/st_sensors/st_sensors_i2c.c +++ b/drivers/iio/common/st_sensors/st_sensors_i2c.c @@ -72,6 +72,7 @@ void st_sensors_i2c_configure(struct iio_dev *indio_dev, indio_dev->dev.parent = &client->dev; indio_dev->name = client->name; + sdata->dev = &client->dev; sdata->tf = &st_sensors_tf_i2c; sdata->get_irq_data_ready = st_sensors_i2c_get_irq; } diff --git a/drivers/iio/common/st_sensors/st_sensors_spi.c b/drivers/iio/common/st_sensors/st_sensors_spi.c index 251baf6..78a6a1a 100644 --- a/drivers/iio/common/st_sensors/st_sensors_spi.c +++ b/drivers/iio/common/st_sensors/st_sensors_spi.c @@ -111,6 +111,7 @@ void st_sensors_spi_configure(struct iio_dev *indio_dev, indio_dev->dev.parent = &spi->dev; indio_dev->name = spi->modalias; + sdata->dev = &spi->dev; sdata->tf = &st_sensors_tf_spi; sdata->get_irq_data_ready = st_sensors_spi_get_irq; } diff --git a/drivers/iio/gyro/st_gyro.h b/drivers/iio/gyro/st_gyro.h index c197360..5353d63 100644 --- a/drivers/iio/gyro/st_gyro.h +++ b/drivers/iio/gyro/st_gyro.h @@ -30,8 +30,7 @@ static const struct st_sensors_platform_data gyro_pdata = { .drdy_int_pin = 2, }; -int st_gyro_common_probe(struct iio_dev *indio_dev, - struct st_sensors_platform_data *pdata); +int st_gyro_common_probe(struct iio_dev *indio_dev); void st_gyro_common_remove(struct iio_dev *indio_dev); #ifdef CONFIG_IIO_BUFFER diff --git a/drivers/iio/gyro/st_gyro_core.c b/drivers/iio/gyro/st_gyro_core.c index f156fc6..f07a233 100644 --- a/drivers/iio/gyro/st_gyro_core.c +++ b/drivers/iio/gyro/st_gyro_core.c @@ -103,7 +103,7 @@ static const struct iio_chan_spec st_gyro_16bit_channels[] = { IIO_CHAN_SOFT_TIMESTAMP(3) }; -static const struct st_sensors st_gyro_sensors[] = { +static const struct st_sensor_settings st_gyro_sensors_settings[] = { { .wai = ST_GYRO_1_WAI_EXP, .sensors_supported = { @@ -309,8 +309,7 @@ static const struct iio_trigger_ops st_gyro_trigger_ops = { #define ST_GYRO_TRIGGER_OPS NULL #endif -int st_gyro_common_probe(struct iio_dev *indio_dev, - struct st_sensors_platform_data *pdata) +int st_gyro_common_probe(struct iio_dev *indio_dev) { struct st_sensor_data *gdata = iio_priv(indio_dev); int irq = gdata->get_irq_data_ready(indio_dev); @@ -322,20 +321,22 @@ int st_gyro_common_probe(struct iio_dev *indio_dev, st_sensors_power_enable(indio_dev); err = st_sensors_check_device_support(indio_dev, - ARRAY_SIZE(st_gyro_sensors), st_gyro_sensors); + ARRAY_SIZE(st_gyro_sensors_settings), + st_gyro_sensors_settings); if (err < 0) return err; gdata->num_data_channels = ST_GYRO_NUMBER_DATA_CHANNELS; - gdata->multiread_bit = gdata->sensor->multi_read_bit; - indio_dev->channels = gdata->sensor->ch; + gdata->multiread_bit = gdata->sensor_settings->multi_read_bit; + indio_dev->channels = gdata->sensor_settings->ch; indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; gdata->current_fullscale = (struct st_sensor_fullscale_avl *) - &gdata->sensor->fs.fs_avl[0]; - gdata->odr = gdata->sensor->odr.odr_avl[0].hz; + &gdata->sensor_settings->fs.fs_avl[0]; + gdata->odr = gdata->sensor_settings->odr.odr_avl[0].hz; - err = st_sensors_init_sensor(indio_dev, pdata); + err = st_sensors_init_sensor(indio_dev, + (struct st_sensors_platform_data *)&gyro_pdata); if (err < 0) return err; diff --git a/drivers/iio/gyro/st_gyro_i2c.c b/drivers/iio/gyro/st_gyro_i2c.c index 8fa0ad2..64480b1 100644 --- a/drivers/iio/gyro/st_gyro_i2c.c +++ b/drivers/iio/gyro/st_gyro_i2c.c @@ -67,13 +67,11 @@ static int st_gyro_i2c_probe(struct i2c_client *client, return -ENOMEM; gdata = iio_priv(indio_dev); - gdata->dev = &client->dev; st_sensors_of_i2c_probe(client, st_gyro_of_match); st_sensors_i2c_configure(indio_dev, client, gdata); - err = st_gyro_common_probe(indio_dev, - (struct st_sensors_platform_data *)&gyro_pdata); + err = st_gyro_common_probe(indio_dev); if (err < 0) return err; diff --git a/drivers/iio/gyro/st_gyro_spi.c b/drivers/iio/gyro/st_gyro_spi.c index b4ad3be..e59bead 100644 --- a/drivers/iio/gyro/st_gyro_spi.c +++ b/drivers/iio/gyro/st_gyro_spi.c @@ -29,12 +29,10 @@ static int st_gyro_spi_probe(struct spi_device *spi) return -ENOMEM; gdata = iio_priv(indio_dev); - gdata->dev = &spi->dev; st_sensors_spi_configure(indio_dev, spi, gdata); - err = st_gyro_common_probe(indio_dev, - (struct st_sensors_platform_data *)&gyro_pdata); + err = st_gyro_common_probe(indio_dev); if (err < 0) return err; diff --git a/drivers/iio/humidity/Kconfig b/drivers/iio/humidity/Kconfig index e116bd8..4813b79 100644 --- a/drivers/iio/humidity/Kconfig +++ b/drivers/iio/humidity/Kconfig @@ -22,4 +22,14 @@ config SI7005 To compile this driver as a module, choose M here: the module will be called si7005. +config SI7020 + tristate "Si7013/20/21 Relative Humidity and Temperature Sensors" + depends on I2C + help + Say yes here to build support for the Silicon Labs Si7013/20/21 + Relative Humidity and Temperature Sensors. + + To compile this driver as a module, choose M here: the module + will be called si7020. + endmenu diff --git a/drivers/iio/humidity/Makefile b/drivers/iio/humidity/Makefile index e3f3d94..86e2d26 100644 --- a/drivers/iio/humidity/Makefile +++ b/drivers/iio/humidity/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_DHT11) += dht11.o obj-$(CONFIG_SI7005) += si7005.o +obj-$(CONFIG_SI7020) += si7020.o diff --git a/drivers/iio/humidity/si7020.c b/drivers/iio/humidity/si7020.c new file mode 100644 index 0000000..b541646 --- /dev/null +++ b/drivers/iio/humidity/si7020.c @@ -0,0 +1,161 @@ +/* + * si7020.c - Silicon Labs Si7013/20/21 Relative Humidity and Temp Sensors + * Copyright (c) 2013,2014 Uplogix, Inc. + * David Barksdale <dbarksdale@uplogix.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +/* + * The Silicon Labs Si7013/20/21 Relative Humidity and Temperature Sensors + * are i2c devices which have an identical programming interface for + * measuring relative humidity and temperature. The Si7013 has an additional + * temperature input which this driver does not support. + * + * Data Sheets: + * Si7013: http://www.silabs.com/Support%20Documents/TechnicalDocs/Si7013.pdf + * Si7020: http://www.silabs.com/Support%20Documents/TechnicalDocs/Si7020.pdf + * Si7021: http://www.silabs.com/Support%20Documents/TechnicalDocs/Si7021.pdf + */ + +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/sysfs.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> + +/* Measure Relative Humidity, Hold Master Mode */ +#define SI7020CMD_RH_HOLD 0xE5 +/* Measure Temperature, Hold Master Mode */ +#define SI7020CMD_TEMP_HOLD 0xE3 +/* Software Reset */ +#define SI7020CMD_RESET 0xFE + +static int si7020_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, + int *val2, long mask) +{ + struct i2c_client *client = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = i2c_smbus_read_word_data(client, + chan->type == IIO_TEMP ? + SI7020CMD_TEMP_HOLD : + SI7020CMD_RH_HOLD); + if (ret < 0) + return ret; + *val = ret >> 2; + if (chan->type == IIO_HUMIDITYRELATIVE) + *val &= GENMASK(11, 0); + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + if (chan->type == IIO_TEMP) + *val = 175720; /* = 175.72 * 1000 */ + else + *val = 125 * 1000; + *val2 = 65536 >> 2; + return IIO_VAL_FRACTIONAL; + case IIO_CHAN_INFO_OFFSET: + /* + * Since iio_convert_raw_to_processed_unlocked assumes offset + * is an integer we have to round these values and lose + * accuracy. + * Relative humidity will be 0.0032959% too high and + * temperature will be 0.00277344 degrees too high. + * This is no big deal because it's within the accuracy of the + * sensor. + */ + if (chan->type == IIO_TEMP) + *val = -4368; /* = -46.85 * (65536 >> 2) / 175.72 */ + else + *val = -786; /* = -6 * (65536 >> 2) / 125 */ + return IIO_VAL_INT; + default: + break; + } + + return -EINVAL; +} + +static const struct iio_chan_spec si7020_channels[] = { + { + .type = IIO_HUMIDITYRELATIVE, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), + }, + { + .type = IIO_TEMP, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), + } +}; + +static const struct iio_info si7020_info = { + .read_raw = si7020_read_raw, + .driver_module = THIS_MODULE, +}; + +static int si7020_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct iio_dev *indio_dev; + struct i2c_client **data; + int ret; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_WRITE_BYTE | + I2C_FUNC_SMBUS_READ_WORD_DATA)) + return -ENODEV; + + /* Reset device, loads default settings. */ + ret = i2c_smbus_write_byte(client, SI7020CMD_RESET); + if (ret < 0) + return ret; + /* Wait the maximum power-up time after software reset. */ + msleep(15); + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*client)); + if (!indio_dev) + return -ENOMEM; + + data = iio_priv(indio_dev); + *data = client; + + indio_dev->dev.parent = &client->dev; + indio_dev->name = dev_name(&client->dev); + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &si7020_info; + indio_dev->channels = si7020_channels; + indio_dev->num_channels = ARRAY_SIZE(si7020_channels); + + return devm_iio_device_register(&client->dev, indio_dev); +} + +static const struct i2c_device_id si7020_id[] = { + { "si7020", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, si7020_id); + +static struct i2c_driver si7020_driver = { + .driver.name = "si7020", + .probe = si7020_probe, + .id_table = si7020_id, +}; + +module_i2c_driver(si7020_driver); +MODULE_DESCRIPTION("Silicon Labs Si7013/20/21 Relative Humidity and Temperature Sensors"); +MODULE_AUTHOR("David Barksdale <dbarksdale@uplogix.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c index f084610..866fe90 100644 --- a/drivers/iio/inkern.c +++ b/drivers/iio/inkern.c @@ -100,6 +100,28 @@ static int iio_dev_node_match(struct device *dev, void *data) return dev->of_node == data && dev->type == &iio_device_type; } +/** + * __of_iio_simple_xlate - translate iiospec to the IIO channel index + * @indio_dev: pointer to the iio_dev structure + * @iiospec: IIO specifier as found in the device tree + * + * This is simple translation function, suitable for the most 1:1 mapped + * channels in IIO chips. This function performs only one sanity check: + * whether IIO index is less than num_channels (that is specified in the + * iio_dev). + */ +static int __of_iio_simple_xlate(struct iio_dev *indio_dev, + const struct of_phandle_args *iiospec) +{ + if (!iiospec->args_count) + return 0; + + if (iiospec->args[0] >= indio_dev->num_channels) + return -EINVAL; + + return iiospec->args[0]; +} + static int __of_iio_channel_get(struct iio_channel *channel, struct device_node *np, int index) { @@ -122,18 +144,19 @@ static int __of_iio_channel_get(struct iio_channel *channel, indio_dev = dev_to_iio_dev(idev); channel->indio_dev = indio_dev; - index = iiospec.args_count ? iiospec.args[0] : 0; - if (index >= indio_dev->num_channels) { - err = -EINVAL; + if (indio_dev->info->of_xlate) + index = indio_dev->info->of_xlate(indio_dev, &iiospec); + else + index = __of_iio_simple_xlate(indio_dev, &iiospec); + if (index < 0) goto err_put; - } channel->channel = &indio_dev->channels[index]; return 0; err_put: iio_device_put(indio_dev); - return err; + return index; } static struct iio_channel *of_iio_channel_get(struct device_node *np, int index) diff --git a/drivers/iio/magnetometer/st_magn.h b/drivers/iio/magnetometer/st_magn.h index 694e33e..7e81d00 100644 --- a/drivers/iio/magnetometer/st_magn.h +++ b/drivers/iio/magnetometer/st_magn.h @@ -18,8 +18,7 @@ #define LSM303DLM_MAGN_DEV_NAME "lsm303dlm_magn" #define LIS3MDL_MAGN_DEV_NAME "lis3mdl" -int st_magn_common_probe(struct iio_dev *indio_dev, - struct st_sensors_platform_data *pdata); +int st_magn_common_probe(struct iio_dev *indio_dev); void st_magn_common_remove(struct iio_dev *indio_dev); #ifdef CONFIG_IIO_BUFFER diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c index 68cae86..8ade473 100644 --- a/drivers/iio/magnetometer/st_magn_core.c +++ b/drivers/iio/magnetometer/st_magn_core.c @@ -149,7 +149,7 @@ static const struct iio_chan_spec st_magn_2_16bit_channels[] = { IIO_CHAN_SOFT_TIMESTAMP(3) }; -static const struct st_sensors st_magn_sensors[] = { +static const struct st_sensor_settings st_magn_sensors_settings[] = { { .wai = ST_MAGN_1_WAI_EXP, .sensors_supported = { @@ -361,8 +361,7 @@ static const struct iio_info magn_info = { .write_raw = &st_magn_write_raw, }; -int st_magn_common_probe(struct iio_dev *indio_dev, - struct st_sensors_platform_data *pdata) +int st_magn_common_probe(struct iio_dev *indio_dev) { struct st_sensor_data *mdata = iio_priv(indio_dev); int irq = mdata->get_irq_data_ready(indio_dev); @@ -374,20 +373,21 @@ int st_magn_common_probe(struct iio_dev *indio_dev, st_sensors_power_enable(indio_dev); err = st_sensors_check_device_support(indio_dev, - ARRAY_SIZE(st_magn_sensors), st_magn_sensors); + ARRAY_SIZE(st_magn_sensors_settings), + st_magn_sensors_settings); if (err < 0) return err; mdata->num_data_channels = ST_MAGN_NUMBER_DATA_CHANNELS; - mdata->multiread_bit = mdata->sensor->multi_read_bit; - indio_dev->channels = mdata->sensor->ch; + mdata->multiread_bit = mdata->sensor_settings->multi_read_bit; + indio_dev->channels = mdata->sensor_settings->ch; indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; mdata->current_fullscale = (struct st_sensor_fullscale_avl *) - &mdata->sensor->fs.fs_avl[0]; - mdata->odr = mdata->sensor->odr.odr_avl[0].hz; + &mdata->sensor_settings->fs.fs_avl[0]; + mdata->odr = mdata->sensor_settings->odr.odr_avl[0].hz; - err = st_sensors_init_sensor(indio_dev, pdata); + err = st_sensors_init_sensor(indio_dev, NULL); if (err < 0) return err; diff --git a/drivers/iio/magnetometer/st_magn_i2c.c b/drivers/iio/magnetometer/st_magn_i2c.c index 6892500..92e5c15 100644 --- a/drivers/iio/magnetometer/st_magn_i2c.c +++ b/drivers/iio/magnetometer/st_magn_i2c.c @@ -51,12 +51,11 @@ static int st_magn_i2c_probe(struct i2c_client *client, return -ENOMEM; mdata = iio_priv(indio_dev); - mdata->dev = &client->dev; st_sensors_of_i2c_probe(client, st_magn_of_match); st_sensors_i2c_configure(indio_dev, client, mdata); - err = st_magn_common_probe(indio_dev, NULL); + err = st_magn_common_probe(indio_dev); if (err < 0) return err; diff --git a/drivers/iio/magnetometer/st_magn_spi.c b/drivers/iio/magnetometer/st_magn_spi.c index a6143ea..7adacf1 100644 --- a/drivers/iio/magnetometer/st_magn_spi.c +++ b/drivers/iio/magnetometer/st_magn_spi.c @@ -29,11 +29,10 @@ static int st_magn_spi_probe(struct spi_device *spi) return -ENOMEM; mdata = iio_priv(indio_dev); - mdata->dev = &spi->dev; st_sensors_spi_configure(indio_dev, spi, mdata); - err = st_magn_common_probe(indio_dev, NULL); + err = st_magn_common_probe(indio_dev); if (err < 0) return err; diff --git a/drivers/iio/pressure/Kconfig b/drivers/iio/pressure/Kconfig index 15afbc9..a3be537 100644 --- a/drivers/iio/pressure/Kconfig +++ b/drivers/iio/pressure/Kconfig @@ -5,6 +5,17 @@ menu "Pressure sensors" +config BMP280 + tristate "Bosch Sensortec BMP280 pressure sensor driver" + depends on I2C + select REGMAP_I2C + help + Say yes here to build support for Bosch Sensortec BMP280 + pressure and temperature sensor. + + To compile this driver as a module, choose M here: the module + will be called bmp280. + config HID_SENSOR_PRESS depends on HID_SENSOR_HUB select IIO_BUFFER diff --git a/drivers/iio/pressure/Makefile b/drivers/iio/pressure/Makefile index 90a37e8..88011f2 100644 --- a/drivers/iio/pressure/Makefile +++ b/drivers/iio/pressure/Makefile @@ -3,6 +3,7 @@ # # When adding new entries keep the list in alphabetical order +obj-$(CONFIG_BMP280) += bmp280.o obj-$(CONFIG_HID_SENSOR_PRESS) += hid-sensor-press.o obj-$(CONFIG_MPL115) += mpl115.o obj-$(CONFIG_MPL3115) += mpl3115.o diff --git a/drivers/iio/pressure/bmp280.c b/drivers/iio/pressure/bmp280.c new file mode 100644 index 0000000..75038da --- /dev/null +++ b/drivers/iio/pressure/bmp280.c @@ -0,0 +1,455 @@ +/* + * Copyright (c) 2014 Intel Corporation + * + * Driver for Bosch Sensortec BMP280 digital pressure sensor. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#define pr_fmt(fmt) "bmp280: " fmt + +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/acpi.h> +#include <linux/regmap.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> + +#define BMP280_REG_TEMP_XLSB 0xFC +#define BMP280_REG_TEMP_LSB 0xFB +#define BMP280_REG_TEMP_MSB 0xFA +#define BMP280_REG_PRESS_XLSB 0xF9 +#define BMP280_REG_PRESS_LSB 0xF8 +#define BMP280_REG_PRESS_MSB 0xF7 + +#define BMP280_REG_CONFIG 0xF5 +#define BMP280_REG_CTRL_MEAS 0xF4 +#define BMP280_REG_STATUS 0xF3 +#define BMP280_REG_RESET 0xE0 +#define BMP280_REG_ID 0xD0 + +#define BMP280_REG_COMP_TEMP_START 0x88 +#define BMP280_COMP_TEMP_REG_COUNT 6 + +#define BMP280_REG_COMP_PRESS_START 0x8E +#define BMP280_COMP_PRESS_REG_COUNT 18 + +#define BMP280_FILTER_MASK (BIT(4) | BIT(3) | BIT(2)) +#define BMP280_FILTER_OFF 0 +#define BMP280_FILTER_2X BIT(2) +#define BMP280_FILTER_4X BIT(3) +#define BMP280_FILTER_8X (BIT(3) | BIT(2)) +#define BMP280_FILTER_16X BIT(4) + +#define BMP280_OSRS_TEMP_MASK (BIT(7) | BIT(6) | BIT(5)) +#define BMP280_OSRS_TEMP_SKIP 0 +#define BMP280_OSRS_TEMP_1X BIT(5) +#define BMP280_OSRS_TEMP_2X BIT(6) +#define BMP280_OSRS_TEMP_4X (BIT(6) | BIT(5)) +#define BMP280_OSRS_TEMP_8X BIT(7) +#define BMP280_OSRS_TEMP_16X (BIT(7) | BIT(5)) + +#define BMP280_OSRS_PRESS_MASK (BIT(4) | BIT(3) | BIT(2)) +#define BMP280_OSRS_PRESS_SKIP 0 +#define BMP280_OSRS_PRESS_1X BIT(2) +#define BMP280_OSRS_PRESS_2X BIT(3) +#define BMP280_OSRS_PRESS_4X (BIT(3) | BIT(2)) +#define BMP280_OSRS_PRESS_8X BIT(4) +#define BMP280_OSRS_PRESS_16X (BIT(4) | BIT(2)) + +#define BMP280_MODE_MASK (BIT(1) | BIT(0)) +#define BMP280_MODE_SLEEP 0 +#define BMP280_MODE_FORCED BIT(0) +#define BMP280_MODE_NORMAL (BIT(1) | BIT(0)) + +#define BMP280_CHIP_ID 0x58 +#define BMP280_SOFT_RESET_VAL 0xB6 + +struct bmp280_data { + struct i2c_client *client; + struct mutex lock; + struct regmap *regmap; + + /* + * Carryover value from temperature conversion, used in pressure + * calculation. + */ + s32 t_fine; +}; + +/* Compensation parameters. */ +struct bmp280_comp_temp { + u16 dig_t1; + s16 dig_t2, dig_t3; +}; + +struct bmp280_comp_press { + u16 dig_p1; + s16 dig_p2, dig_p3, dig_p4, dig_p5, dig_p6, dig_p7, dig_p8, dig_p9; +}; + +static const struct iio_chan_spec bmp280_channels[] = { + { + .type = IIO_PRESSURE, + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), + }, + { + .type = IIO_TEMP, + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), + }, +}; + +static bool bmp280_is_writeable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case BMP280_REG_CONFIG: + case BMP280_REG_CTRL_MEAS: + case BMP280_REG_RESET: + return true; + default: + return false; + }; +} + +static bool bmp280_is_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case BMP280_REG_TEMP_XLSB: + case BMP280_REG_TEMP_LSB: + case BMP280_REG_TEMP_MSB: + case BMP280_REG_PRESS_XLSB: + case BMP280_REG_PRESS_LSB: + case BMP280_REG_PRESS_MSB: + case BMP280_REG_STATUS: + return true; + default: + return false; + } +} + +static const struct regmap_config bmp280_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = BMP280_REG_TEMP_XLSB, + .cache_type = REGCACHE_RBTREE, + + .writeable_reg = bmp280_is_writeable_reg, + .volatile_reg = bmp280_is_volatile_reg, +}; + +static int bmp280_read_compensation_temp(struct bmp280_data *data, + struct bmp280_comp_temp *comp) +{ + int ret; + __le16 buf[BMP280_COMP_TEMP_REG_COUNT / 2]; + + ret = regmap_bulk_read(data->regmap, BMP280_REG_COMP_TEMP_START, + buf, BMP280_COMP_TEMP_REG_COUNT); + if (ret < 0) { + dev_err(&data->client->dev, + "failed to read temperature calibration parameters\n"); + return ret; + } + + comp->dig_t1 = (u16) le16_to_cpu(buf[0]); + comp->dig_t2 = (s16) le16_to_cpu(buf[1]); + comp->dig_t3 = (s16) le16_to_cpu(buf[2]); + + return 0; +} + +static int bmp280_read_compensation_press(struct bmp280_data *data, + struct bmp280_comp_press *comp) +{ + int ret; + __le16 buf[BMP280_COMP_PRESS_REG_COUNT / 2]; + + ret = regmap_bulk_read(data->regmap, BMP280_REG_COMP_PRESS_START, + buf, BMP280_COMP_PRESS_REG_COUNT); + if (ret < 0) { + dev_err(&data->client->dev, + "failed to read pressure calibration parameters\n"); + return ret; + } + + comp->dig_p1 = (u16) le16_to_cpu(buf[0]); + comp->dig_p2 = (s16) le16_to_cpu(buf[1]); + comp->dig_p3 = (s16) le16_to_cpu(buf[2]); + comp->dig_p4 = (s16) le16_to_cpu(buf[3]); + comp->dig_p5 = (s16) le16_to_cpu(buf[4]); + comp->dig_p6 = (s16) le16_to_cpu(buf[5]); + comp->dig_p7 = (s16) le16_to_cpu(buf[6]); + comp->dig_p8 = (s16) le16_to_cpu(buf[7]); + comp->dig_p9 = (s16) le16_to_cpu(buf[8]); + + return 0; +} + +/* + * Returns temperature in DegC, resolution is 0.01 DegC. Output value of + * "5123" equals 51.23 DegC. t_fine carries fine temperature as global + * value. + * + * Taken from datasheet, Section 3.11.3, "Compensation formula". + */ +static s32 bmp280_compensate_temp(struct bmp280_data *data, + struct bmp280_comp_temp *comp, + s32 adc_temp) +{ + s32 var1, var2, t; + + var1 = (((adc_temp >> 3) - ((s32) comp->dig_t1 << 1)) * + ((s32) comp->dig_t2)) >> 11; + var2 = (((((adc_temp >> 4) - ((s32) comp->dig_t1)) * + ((adc_temp >> 4) - ((s32) comp->dig_t1))) >> 12) * + ((s32) comp->dig_t3)) >> 14; + + data->t_fine = var1 + var2; + t = (data->t_fine * 5 + 128) >> 8; + + return t; +} + +/* + * Returns pressure in Pa as unsigned 32 bit integer in Q24.8 format (24 + * integer bits and 8 fractional bits). Output value of "24674867" + * represents 24674867/256 = 96386.2 Pa = 963.862 hPa + * + * Taken from datasheet, Section 3.11.3, "Compensation formula". + */ +static u32 bmp280_compensate_press(struct bmp280_data *data, + struct bmp280_comp_press *comp, + s32 adc_press) +{ + s64 var1, var2, p; + + var1 = ((s64) data->t_fine) - 128000; + var2 = var1 * var1 * (s64) comp->dig_p6; + var2 = var2 + ((var1 * (s64) comp->dig_p5) << 17); + var2 = var2 + (((s64) comp->dig_p4) << 35); + var1 = ((var1 * var1 * (s64) comp->dig_p3) >> 8) + + ((var1 * (s64) comp->dig_p2) << 12); + var1 = (((((s64) 1) << 47) + var1)) * ((s64) comp->dig_p1) >> 33; + + if (var1 == 0) + return 0; + + p = ((((s64) 1048576 - adc_press) << 31) - var2) * 3125; + p = div64_s64(p, var1); + var1 = (((s64) comp->dig_p9) * (p >> 13) * (p >> 13)) >> 25; + var2 = (((s64) comp->dig_p8) * p) >> 19; + p = ((p + var1 + var2) >> 8) + (((s64) comp->dig_p7) << 4); + + return (u32) p; +} + +static int bmp280_read_temp(struct bmp280_data *data, + int *val) +{ + int ret; + __be32 tmp = 0; + s32 adc_temp, comp_temp; + struct bmp280_comp_temp comp; + + ret = bmp280_read_compensation_temp(data, &comp); + if (ret < 0) + return ret; + + ret = regmap_bulk_read(data->regmap, BMP280_REG_TEMP_MSB, + (u8 *) &tmp, 3); + if (ret < 0) { + dev_err(&data->client->dev, "failed to read temperature\n"); + return ret; + } + + adc_temp = be32_to_cpu(tmp) >> 12; + comp_temp = bmp280_compensate_temp(data, &comp, adc_temp); + + /* + * val might be NULL if we're called by the read_press routine, + * who only cares about the carry over t_fine value. + */ + if (val) { + *val = comp_temp * 10; + return IIO_VAL_INT; + } + + return 0; +} + +static int bmp280_read_press(struct bmp280_data *data, + int *val, int *val2) +{ + int ret; + __be32 tmp = 0; + s32 adc_press; + u32 comp_press; + struct bmp280_comp_press comp; + + ret = bmp280_read_compensation_press(data, &comp); + if (ret < 0) + return ret; + + /* Read and compensate temperature so we get a reading of t_fine. */ + ret = bmp280_read_temp(data, NULL); + if (ret < 0) + return ret; + + ret = regmap_bulk_read(data->regmap, BMP280_REG_PRESS_MSB, + (u8 *) &tmp, 3); + if (ret < 0) { + dev_err(&data->client->dev, "failed to read pressure\n"); + return ret; + } + + adc_press = be32_to_cpu(tmp) >> 12; + comp_press = bmp280_compensate_press(data, &comp, adc_press); + + *val = comp_press; + *val2 = 256000; + + return IIO_VAL_FRACTIONAL; +} + +static int bmp280_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + int ret; + struct bmp280_data *data = iio_priv(indio_dev); + + mutex_lock(&data->lock); + + switch (mask) { + case IIO_CHAN_INFO_PROCESSED: + switch (chan->type) { + case IIO_PRESSURE: + ret = bmp280_read_press(data, val, val2); + break; + case IIO_TEMP: + ret = bmp280_read_temp(data, val); + break; + default: + ret = -EINVAL; + break; + } + break; + default: + ret = -EINVAL; + break; + } + + mutex_unlock(&data->lock); + + return ret; +} + +static const struct iio_info bmp280_info = { + .driver_module = THIS_MODULE, + .read_raw = &bmp280_read_raw, +}; + +static int bmp280_chip_init(struct bmp280_data *data) +{ + int ret; + + ret = regmap_update_bits(data->regmap, BMP280_REG_CTRL_MEAS, + BMP280_OSRS_TEMP_MASK | + BMP280_OSRS_PRESS_MASK | + BMP280_MODE_MASK, + BMP280_OSRS_TEMP_2X | + BMP280_OSRS_PRESS_16X | + BMP280_MODE_NORMAL); + if (ret < 0) { + dev_err(&data->client->dev, + "failed to write config register\n"); + return ret; + } + + ret = regmap_update_bits(data->regmap, BMP280_REG_CONFIG, + BMP280_FILTER_MASK, + BMP280_FILTER_4X); + if (ret < 0) { + dev_err(&data->client->dev, + "failed to write config register\n"); + return ret; + } + + return ret; +} + +static int bmp280_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret; + struct iio_dev *indio_dev; + struct bmp280_data *data; + unsigned int chip_id; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + i2c_set_clientdata(client, indio_dev); + data = iio_priv(indio_dev); + mutex_init(&data->lock); + data->client = client; + + indio_dev->dev.parent = &client->dev; + indio_dev->name = id->name; + indio_dev->channels = bmp280_channels; + indio_dev->num_channels = ARRAY_SIZE(bmp280_channels); + indio_dev->info = &bmp280_info; + indio_dev->modes = INDIO_DIRECT_MODE; + + data->regmap = devm_regmap_init_i2c(client, &bmp280_regmap_config); + if (IS_ERR(data->regmap)) { + dev_err(&client->dev, "failed to allocate register map\n"); + return PTR_ERR(data->regmap); + } + + ret = regmap_read(data->regmap, BMP280_REG_ID, &chip_id); + if (ret < 0) + return ret; + if (chip_id != BMP280_CHIP_ID) { + dev_err(&client->dev, "bad chip id. expected %x got %x\n", + BMP280_CHIP_ID, chip_id); + return -EINVAL; + } + + ret = bmp280_chip_init(data); + if (ret < 0) + return ret; + + return devm_iio_device_register(&client->dev, indio_dev); +} + +static const struct acpi_device_id bmp280_acpi_match[] = { + {"BMP0280", 0}, + { }, +}; +MODULE_DEVICE_TABLE(acpi, bmp280_acpi_match); + +static const struct i2c_device_id bmp280_id[] = { + {"bmp280", 0}, + { }, +}; +MODULE_DEVICE_TABLE(i2c, bmp280_id); + +static struct i2c_driver bmp280_driver = { + .driver = { + .name = "bmp280", + .acpi_match_table = ACPI_PTR(bmp280_acpi_match), + }, + .probe = bmp280_probe, + .id_table = bmp280_id, +}; +module_i2c_driver(bmp280_driver); + +MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@intel.com>"); +MODULE_DESCRIPTION("Driver for Bosch Sensortec BMP280 pressure and temperature sensor"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/pressure/st_pressure.h b/drivers/iio/pressure/st_pressure.h index 242943c..f5f4149 100644 --- a/drivers/iio/pressure/st_pressure.h +++ b/drivers/iio/pressure/st_pressure.h @@ -26,8 +26,7 @@ static const struct st_sensors_platform_data default_press_pdata = { .drdy_int_pin = 1, }; -int st_press_common_probe(struct iio_dev *indio_dev, - struct st_sensors_platform_data *pdata); +int st_press_common_probe(struct iio_dev *indio_dev); void st_press_common_remove(struct iio_dev *indio_dev); #ifdef CONFIG_IIO_BUFFER diff --git a/drivers/iio/pressure/st_pressure_buffer.c b/drivers/iio/pressure/st_pressure_buffer.c index b37b1c9..2ff53f2 100644 --- a/drivers/iio/pressure/st_pressure_buffer.c +++ b/drivers/iio/pressure/st_pressure_buffer.c @@ -38,10 +38,10 @@ static int st_press_buffer_preenable(struct iio_dev *indio_dev) static int st_press_buffer_postenable(struct iio_dev *indio_dev) { int err; - struct st_sensor_data *pdata = iio_priv(indio_dev); + struct st_sensor_data *press_data = iio_priv(indio_dev); - pdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); - if (pdata->buffer_data == NULL) { + press_data->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); + if (press_data->buffer_data == NULL) { err = -ENOMEM; goto allocate_memory_error; } @@ -53,7 +53,7 @@ static int st_press_buffer_postenable(struct iio_dev *indio_dev) return err; st_press_buffer_postenable_error: - kfree(pdata->buffer_data); + kfree(press_data->buffer_data); allocate_memory_error: return err; } @@ -61,7 +61,7 @@ allocate_memory_error: static int st_press_buffer_predisable(struct iio_dev *indio_dev) { int err; - struct st_sensor_data *pdata = iio_priv(indio_dev); + struct st_sensor_data *press_data = iio_priv(indio_dev); err = iio_triggered_buffer_predisable(indio_dev); if (err < 0) @@ -70,7 +70,7 @@ static int st_press_buffer_predisable(struct iio_dev *indio_dev) err = st_sensors_set_enable(indio_dev, false); st_press_buffer_predisable_error: - kfree(pdata->buffer_data); + kfree(press_data->buffer_data); return err; } diff --git a/drivers/iio/pressure/st_pressure_core.c b/drivers/iio/pressure/st_pressure_core.c index 473d914..97baf40d 100644 --- a/drivers/iio/pressure/st_pressure_core.c +++ b/drivers/iio/pressure/st_pressure_core.c @@ -175,7 +175,7 @@ static const struct iio_chan_spec st_press_lps001wp_channels[] = { IIO_CHAN_SOFT_TIMESTAMP(1) }; -static const struct st_sensors st_press_sensors[] = { +static const struct st_sensor_settings st_press_sensors_settings[] = { { .wai = ST_PRESS_LPS331AP_WAI_EXP, .sensors_supported = { @@ -333,7 +333,7 @@ static int st_press_read_raw(struct iio_dev *indio_dev, int *val2, long mask) { int err; - struct st_sensor_data *pdata = iio_priv(indio_dev); + struct st_sensor_data *press_data = iio_priv(indio_dev); switch (mask) { case IIO_CHAN_INFO_RAW: @@ -347,10 +347,10 @@ static int st_press_read_raw(struct iio_dev *indio_dev, switch (ch->type) { case IIO_PRESSURE: - *val2 = pdata->current_fullscale->gain; + *val2 = press_data->current_fullscale->gain; break; case IIO_TEMP: - *val2 = pdata->current_fullscale->gain2; + *val2 = press_data->current_fullscale->gain2; break; default: err = -EINVAL; @@ -371,7 +371,7 @@ static int st_press_read_raw(struct iio_dev *indio_dev, return IIO_VAL_FRACTIONAL; case IIO_CHAN_INFO_SAMP_FREQ: - *val = pdata->odr; + *val = press_data->odr; return IIO_VAL_INT; default: return -EINVAL; @@ -409,11 +409,10 @@ static const struct iio_trigger_ops st_press_trigger_ops = { #define ST_PRESS_TRIGGER_OPS NULL #endif -int st_press_common_probe(struct iio_dev *indio_dev, - struct st_sensors_platform_data *plat_data) +int st_press_common_probe(struct iio_dev *indio_dev) { - struct st_sensor_data *pdata = iio_priv(indio_dev); - int irq = pdata->get_irq_data_ready(indio_dev); + struct st_sensor_data *press_data = iio_priv(indio_dev); + int irq = press_data->get_irq_data_ready(indio_dev); int err; indio_dev->modes = INDIO_DIRECT_MODE; @@ -422,28 +421,30 @@ int st_press_common_probe(struct iio_dev *indio_dev, st_sensors_power_enable(indio_dev); err = st_sensors_check_device_support(indio_dev, - ARRAY_SIZE(st_press_sensors), - st_press_sensors); + ARRAY_SIZE(st_press_sensors_settings), + st_press_sensors_settings); if (err < 0) return err; - pdata->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS; - pdata->multiread_bit = pdata->sensor->multi_read_bit; - indio_dev->channels = pdata->sensor->ch; - indio_dev->num_channels = pdata->sensor->num_ch; + press_data->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS; + press_data->multiread_bit = press_data->sensor_settings->multi_read_bit; + indio_dev->channels = press_data->sensor_settings->ch; + indio_dev->num_channels = press_data->sensor_settings->num_ch; - if (pdata->sensor->fs.addr != 0) - pdata->current_fullscale = (struct st_sensor_fullscale_avl *) - &pdata->sensor->fs.fs_avl[0]; + if (press_data->sensor_settings->fs.addr != 0) + press_data->current_fullscale = + (struct st_sensor_fullscale_avl *) + &press_data->sensor_settings->fs.fs_avl[0]; - pdata->odr = pdata->sensor->odr.odr_avl[0].hz; + press_data->odr = press_data->sensor_settings->odr.odr_avl[0].hz; /* Some devices don't support a data ready pin. */ - if (!plat_data && pdata->sensor->drdy_irq.addr) - plat_data = + if (!press_data->dev->platform_data && + press_data->sensor_settings->drdy_irq.addr) + press_data->dev->platform_data = (struct st_sensors_platform_data *)&default_press_pdata; - err = st_sensors_init_sensor(indio_dev, plat_data); + err = st_sensors_init_sensor(indio_dev, press_data->dev->platform_data); if (err < 0) return err; @@ -479,12 +480,12 @@ EXPORT_SYMBOL(st_press_common_probe); void st_press_common_remove(struct iio_dev *indio_dev) { - struct st_sensor_data *pdata = iio_priv(indio_dev); + struct st_sensor_data *press_data = iio_priv(indio_dev); st_sensors_power_disable(indio_dev); iio_device_unregister(indio_dev); - if (pdata->get_irq_data_ready(indio_dev) > 0) + if (press_data->get_irq_data_ready(indio_dev) > 0) st_sensors_deallocate_trigger(indio_dev); st_press_deallocate_ring(indio_dev); diff --git a/drivers/iio/pressure/st_pressure_i2c.c b/drivers/iio/pressure/st_pressure_i2c.c index acaf165..137788b 100644 --- a/drivers/iio/pressure/st_pressure_i2c.c +++ b/drivers/iio/pressure/st_pressure_i2c.c @@ -43,20 +43,19 @@ static int st_press_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct iio_dev *indio_dev; - struct st_sensor_data *pdata; + struct st_sensor_data *press_data; int err; - indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*pdata)); + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*press_data)); if (!indio_dev) return -ENOMEM; - pdata = iio_priv(indio_dev); - pdata->dev = &client->dev; + press_data = iio_priv(indio_dev); st_sensors_of_i2c_probe(client, st_press_of_match); - st_sensors_i2c_configure(indio_dev, client, pdata); + st_sensors_i2c_configure(indio_dev, client, press_data); - err = st_press_common_probe(indio_dev, client->dev.platform_data); + err = st_press_common_probe(indio_dev); if (err < 0) return err; diff --git a/drivers/iio/pressure/st_pressure_spi.c b/drivers/iio/pressure/st_pressure_spi.c index f45d430..1ffa6d4 100644 --- a/drivers/iio/pressure/st_pressure_spi.c +++ b/drivers/iio/pressure/st_pressure_spi.c @@ -21,19 +21,18 @@ static int st_press_spi_probe(struct spi_device *spi) { struct iio_dev *indio_dev; - struct st_sensor_data *pdata; + struct st_sensor_data *press_data; int err; - indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*pdata)); + indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*press_data)); if (indio_dev == NULL) return -ENOMEM; - pdata = iio_priv(indio_dev); - pdata->dev = &spi->dev; + press_data = iio_priv(indio_dev); - st_sensors_spi_configure(indio_dev, spi, pdata); + st_sensors_spi_configure(indio_dev, spi, press_data); - err = st_press_common_probe(indio_dev, spi->dev.platform_data); + err = st_press_common_probe(indio_dev); if (err < 0) return err; diff --git a/drivers/iio/proximity/as3935.c b/drivers/iio/proximity/as3935.c index 5e780ef..78244e6 100644 --- a/drivers/iio/proximity/as3935.c +++ b/drivers/iio/proximity/as3935.c @@ -95,7 +95,7 @@ static int as3935_read(struct as3935_state *st, unsigned int reg, int *val) *val = ret; return 0; -}; +} static int as3935_write(struct as3935_state *st, unsigned int reg, @@ -107,7 +107,7 @@ static int as3935_write(struct as3935_state *st, buf[1] = val; return spi_write(st->spi, buf, 2); -}; +} static ssize_t as3935_sensor_sensitivity_show(struct device *dev, struct device_attribute *attr, @@ -122,7 +122,7 @@ static ssize_t as3935_sensor_sensitivity_show(struct device *dev, val = (val & AS3935_AFE_MASK) >> 1; return sprintf(buf, "%d\n", val); -}; +} static ssize_t as3935_sensor_sensitivity_store(struct device *dev, struct device_attribute *attr, @@ -142,7 +142,7 @@ static ssize_t as3935_sensor_sensitivity_store(struct device *dev, as3935_write(st, AS3935_AFE_GAIN, val << 1); return len; -}; +} static IIO_DEVICE_ATTR(sensor_sensitivity, S_IRUGO | S_IWUSR, as3935_sensor_sensitivity_show, as3935_sensor_sensitivity_store, 0); @@ -214,7 +214,7 @@ err_read: iio_trigger_notify_done(indio_dev->trig); return IRQ_HANDLED; -}; +} static const struct iio_trigger_ops iio_interrupt_trigger_ops = { .owner = THIS_MODULE, @@ -238,7 +238,7 @@ static void as3935_event_work(struct work_struct *work) dev_warn(&st->spi->dev, "noise level is too high"); break; } -}; +} static irqreturn_t as3935_interrupt_handler(int irq, void *private) { @@ -417,7 +417,7 @@ unregister_trigger: iio_trigger_unregister(st->trig); return ret; -}; +} static int as3935_remove(struct spi_device *spi) { @@ -429,7 +429,7 @@ static int as3935_remove(struct spi_device *spi) iio_trigger_unregister(st->trig); return 0; -}; +} static const struct spi_device_id as3935_id[] = { {"as3935", 0}, diff --git a/drivers/staging/iio/Documentation/generic_buffer.c b/drivers/staging/iio/Documentation/generic_buffer.c index 31dfb21..de4647e 100644 --- a/drivers/staging/iio/Documentation/generic_buffer.c +++ b/drivers/staging/iio/Documentation/generic_buffer.c @@ -162,11 +162,12 @@ int main(int argc, char **argv) char *buffer_access; int scan_size; int noevents = 0; + int notrigger = 0; char *dummy; struct iio_channel_info *channels; - while ((c = getopt(argc, argv, "l:w:c:et:n:")) != -1) { + while ((c = getopt(argc, argv, "l:w:c:et:n:g")) != -1) { switch (c) { case 'n': device_name = optarg; @@ -187,6 +188,9 @@ int main(int argc, char **argv) case 'l': buf_len = strtoul(optarg, &dummy, 10); break; + case 'g': + notrigger = 1; + break; case '?': return -1; } @@ -205,28 +209,32 @@ int main(int argc, char **argv) printf("iio device number being used is %d\n", dev_num); asprintf(&dev_dir_name, "%siio:device%d", iio_dir, dev_num); - if (trigger_name == NULL) { - /* - * Build the trigger name. If it is device associated its - * name is <device_name>_dev[n] where n matches the device - * number found above - */ - ret = asprintf(&trigger_name, - "%s-dev%d", device_name, dev_num); - if (ret < 0) { - ret = -ENOMEM; - goto error_ret; + + if (!notrigger) { + if (trigger_name == NULL) { + /* + * Build the trigger name. If it is device associated + * its name is <device_name>_dev[n] where n matches + * the device number found above. + */ + ret = asprintf(&trigger_name, + "%s-dev%d", device_name, dev_num); + if (ret < 0) { + ret = -ENOMEM; + goto error_ret; + } } - } - /* Verify the trigger exists */ - trig_num = find_type_by_name(trigger_name, "trigger"); - if (trig_num < 0) { - printf("Failed to find the trigger %s\n", trigger_name); - ret = -ENODEV; - goto error_free_triggername; - } - printf("iio trigger number being used is %d\n", trig_num); + /* Verify the trigger exists */ + trig_num = find_type_by_name(trigger_name, "trigger"); + if (trig_num < 0) { + printf("Failed to find the trigger %s\n", trigger_name); + ret = -ENODEV; + goto error_free_triggername; + } + printf("iio trigger number being used is %d\n", trig_num); + } else + printf("trigger-less mode selected\n"); /* * Parse the files in scan_elements to identify what channels are @@ -250,14 +258,18 @@ int main(int argc, char **argv) ret = -ENOMEM; goto error_free_triggername; } - printf("%s %s\n", dev_dir_name, trigger_name); - /* Set the device trigger to be the data ready trigger found above */ - ret = write_sysfs_string_and_verify("trigger/current_trigger", - dev_dir_name, - trigger_name); - if (ret < 0) { - printf("Failed to write current_trigger file\n"); - goto error_free_buf_dir_name; + + if (!notrigger) { + printf("%s %s\n", dev_dir_name, trigger_name); + /* Set the device trigger to be the data ready trigger found + * above */ + ret = write_sysfs_string_and_verify("trigger/current_trigger", + dev_dir_name, + trigger_name); + if (ret < 0) { + printf("Failed to write current_trigger file\n"); + goto error_free_buf_dir_name; + } } /* Setup ring buffer parameters */ @@ -327,9 +339,10 @@ int main(int argc, char **argv) if (ret < 0) goto error_close_buffer_access; - /* Disconnect the trigger - just write a dummy name. */ - write_sysfs_string("trigger/current_trigger", - dev_dir_name, "NULL"); + if (!notrigger) + /* Disconnect the trigger - just write a dummy name. */ + write_sysfs_string("trigger/current_trigger", + dev_dir_name, "NULL"); error_close_buffer_access: close(fp); diff --git a/drivers/staging/iio/accel/lis3l02dq_ring.c b/drivers/staging/iio/accel/lis3l02dq_ring.c index 61f9422..9efc77b 100644 --- a/drivers/staging/iio/accel/lis3l02dq_ring.c +++ b/drivers/staging/iio/accel/lis3l02dq_ring.c @@ -35,6 +35,7 @@ irqreturn_t lis3l02dq_data_rdy_trig_poll(int irq, void *private) iio_trigger_poll(st->trig); return IRQ_HANDLED; } + return IRQ_WAKE_THREAD; } |