diff options
-rw-r--r-- | drivers/staging/iio/magnetometer/Kconfig | 15 | ||||
-rw-r--r-- | drivers/staging/iio/magnetometer/Makefile | 1 | ||||
-rw-r--r-- | drivers/staging/iio/magnetometer/hmc5843_spi.c | 100 |
3 files changed, 116 insertions, 0 deletions
diff --git a/drivers/staging/iio/magnetometer/Kconfig b/drivers/staging/iio/magnetometer/Kconfig index c086f33..dec814a 100644 --- a/drivers/staging/iio/magnetometer/Kconfig +++ b/drivers/staging/iio/magnetometer/Kconfig @@ -22,4 +22,19 @@ config SENSORS_HMC5843_I2C - hmc5843_core (core functions) - hmc5843_i2c (support for HMC5843, HMC5883, HMC5883L and HMC5983) +config SENSORS_HMC5843_SPI + tristate "Honeywell HMC5983 3-Axis Magnetometer (SPI)" + depends on SPI_MASTER + select SENSORS_HMC5843 + select REGMAP_SPI + help + Say Y here to add support for the Honeywell HMC5983 3-Axis Magnetometer + (digital compass). + + This driver can also be compiled as a set of modules. + If so, these modules will be created: + - hmc5843_core (core functions) + - hmc5843_spi (support for HMC5983) + + endmenu diff --git a/drivers/staging/iio/magnetometer/Makefile b/drivers/staging/iio/magnetometer/Makefile index 65baf1c..33761a1 100644 --- a/drivers/staging/iio/magnetometer/Makefile +++ b/drivers/staging/iio/magnetometer/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_SENSORS_HMC5843) += hmc5843_core.o obj-$(CONFIG_SENSORS_HMC5843_I2C) += hmc5843_i2c.o +obj-$(CONFIG_SENSORS_HMC5843_SPI) += hmc5843_spi.o diff --git a/drivers/staging/iio/magnetometer/hmc5843_spi.c b/drivers/staging/iio/magnetometer/hmc5843_spi.c new file mode 100644 index 0000000..98c4b57 --- /dev/null +++ b/drivers/staging/iio/magnetometer/hmc5843_spi.c @@ -0,0 +1,100 @@ +/* + * SPI driver for hmc5983 + * + * Copyright (C) Josef Gajdusek <atx@atx.name> + * + * 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. + * + * */ + +#include <linux/module.h> +#include <linux/spi/spi.h> +#include <linux/iio/iio.h> + +#include "hmc5843.h" + +static const struct regmap_range hmc5843_readable_ranges[] = { + regmap_reg_range(0, HMC5843_ID_END), +}; + +static struct regmap_access_table hmc5843_readable_table = { + .yes_ranges = hmc5843_readable_ranges, + .n_yes_ranges = ARRAY_SIZE(hmc5843_readable_ranges), +}; + +static const struct regmap_range hmc5843_writable_ranges[] = { + regmap_reg_range(0, HMC5843_MODE_REG), +}; + +static struct regmap_access_table hmc5843_writable_table = { + .yes_ranges = hmc5843_writable_ranges, + .n_yes_ranges = ARRAY_SIZE(hmc5843_writable_ranges), +}; + +static const struct regmap_range hmc5843_volatile_ranges[] = { + regmap_reg_range(HMC5843_DATA_OUT_MSB_REGS, HMC5843_STATUS_REG), +}; + +static struct regmap_access_table hmc5843_volatile_table = { + .yes_ranges = hmc5843_volatile_ranges, + .n_yes_ranges = ARRAY_SIZE(hmc5843_volatile_ranges), +}; + +static struct regmap_config hmc5843_spi_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .rd_table = &hmc5843_readable_table, + .wr_table = &hmc5843_writable_table, + .volatile_table = &hmc5843_volatile_table, + + /* Autoincrement address pointer */ + .read_flag_mask = 0xc0, + + .cache_type = REGCACHE_RBTREE, +}; + +static int hmc5843_spi_probe(struct spi_device *spi) +{ + int ret; + + spi->mode = SPI_MODE_3; + spi->max_speed_hz = 8000000; + spi->bits_per_word = 8; + ret = spi_setup(spi); + if (ret) + return ret; + + return hmc5843_common_probe(&spi->dev, + devm_regmap_init_spi(spi, &hmc5843_spi_regmap_config), + HMC5983_ID); +} + +static int hmc5843_spi_remove(struct spi_device *spi) +{ + return hmc5843_common_remove(&spi->dev); +} + +static const struct spi_device_id hmc5843_id[] = { + { "hmc5983", HMC5983_ID }, + { } +}; + +static struct spi_driver hmc5843_driver = { + .driver = { + .name = "hmc5843", + .pm = HMC5843_PM_OPS, + .owner = THIS_MODULE, + }, + .id_table = hmc5843_id, + .probe = hmc5843_spi_probe, + .remove = hmc5843_spi_remove, +}; + +module_spi_driver(hmc5843_driver); + +MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>"); +MODULE_DESCRIPTION("HMC5983 SPI driver"); +MODULE_LICENSE("GPL"); |