summaryrefslogtreecommitdiff
path: root/drivers/iio/light/tsl4531.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/iio/light/tsl4531.c')
-rw-r--r--drivers/iio/light/tsl4531.c258
1 files changed, 0 insertions, 258 deletions
diff --git a/drivers/iio/light/tsl4531.c b/drivers/iio/light/tsl4531.c
deleted file mode 100644
index a15006e..0000000
--- a/drivers/iio/light/tsl4531.c
+++ /dev/null
@@ -1,258 +0,0 @@
-/*
- * tsl4531.c - Support for TAOS TSL4531 ambient light sensor
- *
- * Copyright 2013 Peter Meerwald <pmeerw@pmeerw.net>
- *
- * This file is subject to the terms and conditions of version 2 of
- * the GNU General Public License. See the file COPYING in the main
- * directory of this archive for more details.
- *
- * IIO driver for the TSL4531x family
- * TSL45311/TSL45313: 7-bit I2C slave address 0x39
- * TSL45315/TSL45317: 7-bit I2C slave address 0x29
- *
- * TODO: single cycle measurement
- */
-
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/err.h>
-#include <linux/delay.h>
-
-#include <linux/iio/iio.h>
-#include <linux/iio/sysfs.h>
-
-#define TSL4531_DRV_NAME "tsl4531"
-
-#define TCS3472_COMMAND BIT(7)
-
-#define TSL4531_CONTROL (TCS3472_COMMAND | 0x00)
-#define TSL4531_CONFIG (TCS3472_COMMAND | 0x01)
-#define TSL4531_DATA (TCS3472_COMMAND | 0x04)
-#define TSL4531_ID (TCS3472_COMMAND | 0x0a)
-
-/* operating modes in control register */
-#define TSL4531_MODE_POWERDOWN 0x00
-#define TSL4531_MODE_SINGLE_ADC 0x02
-#define TSL4531_MODE_NORMAL 0x03
-
-/* integration time control in config register */
-#define TSL4531_TCNTRL_400MS 0x00
-#define TSL4531_TCNTRL_200MS 0x01
-#define TSL4531_TCNTRL_100MS 0x02
-
-/* part number in id register */
-#define TSL45311_ID 0x8
-#define TSL45313_ID 0x9
-#define TSL45315_ID 0xa
-#define TSL45317_ID 0xb
-#define TSL4531_ID_SHIFT 4
-
-struct tsl4531_data {
- struct i2c_client *client;
- struct mutex lock;
- int int_time;
-};
-
-static IIO_CONST_ATTR_INT_TIME_AVAIL("0.1 0.2 0.4");
-
-static struct attribute *tsl4531_attributes[] = {
- &iio_const_attr_integration_time_available.dev_attr.attr,
- NULL
-};
-
-static const struct attribute_group tsl4531_attribute_group = {
- .attrs = tsl4531_attributes,
-};
-
-static const struct iio_chan_spec tsl4531_channels[] = {
- {
- .type = IIO_LIGHT,
- .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
- BIT(IIO_CHAN_INFO_SCALE) |
- BIT(IIO_CHAN_INFO_INT_TIME)
- }
-};
-
-static int tsl4531_read_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int *val, int *val2, long mask)
-{
- struct tsl4531_data *data = iio_priv(indio_dev);
- int ret;
-
- switch (mask) {
- case IIO_CHAN_INFO_RAW:
- ret = i2c_smbus_read_word_data(data->client,
- TSL4531_DATA);
- if (ret < 0)
- return ret;
- *val = ret;
- return IIO_VAL_INT;
- case IIO_CHAN_INFO_SCALE:
- /* 0.. 1x, 1 .. 2x, 2 .. 4x */
- *val = 1 << data->int_time;
- return IIO_VAL_INT;
- case IIO_CHAN_INFO_INT_TIME:
- if (data->int_time == 0)
- *val2 = 400000;
- else if (data->int_time == 1)
- *val2 = 200000;
- else if (data->int_time == 2)
- *val2 = 100000;
- else
- return -EINVAL;
- *val = 0;
- return IIO_VAL_INT_PLUS_MICRO;
- default:
- return -EINVAL;
- }
-}
-
-static int tsl4531_write_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int val, int val2, long mask)
-{
- struct tsl4531_data *data = iio_priv(indio_dev);
- int int_time, ret;
-
- switch (mask) {
- case IIO_CHAN_INFO_INT_TIME:
- if (val != 0)
- return -EINVAL;
- if (val2 == 400000)
- int_time = 0;
- else if (val2 == 200000)
- int_time = 1;
- else if (val2 == 100000)
- int_time = 2;
- else
- return -EINVAL;
- mutex_lock(&data->lock);
- ret = i2c_smbus_write_byte_data(data->client,
- TSL4531_CONFIG, int_time);
- if (ret >= 0)
- data->int_time = int_time;
- mutex_unlock(&data->lock);
- return ret;
- default:
- return -EINVAL;
- }
-}
-
-static const struct iio_info tsl4531_info = {
- .read_raw = tsl4531_read_raw,
- .write_raw = tsl4531_write_raw,
- .attrs = &tsl4531_attribute_group,
- .driver_module = THIS_MODULE,
-};
-
-static int tsl4531_check_id(struct i2c_client *client)
-{
- int ret = i2c_smbus_read_byte_data(client, TSL4531_ID);
- if (ret < 0)
- return ret;
-
- switch (ret >> TSL4531_ID_SHIFT) {
- case TSL45311_ID:
- case TSL45313_ID:
- case TSL45315_ID:
- case TSL45317_ID:
- return 1;
- default:
- return 0;
- }
-}
-
-static int tsl4531_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct tsl4531_data *data;
- struct iio_dev *indio_dev;
- int ret;
-
- indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
- if (!indio_dev)
- return -ENOMEM;
-
- data = iio_priv(indio_dev);
- i2c_set_clientdata(client, indio_dev);
- data->client = client;
- mutex_init(&data->lock);
-
- if (!tsl4531_check_id(client)) {
- dev_err(&client->dev, "no TSL4531 sensor\n");
- return -ENODEV;
- }
-
- ret = i2c_smbus_write_byte_data(data->client, TSL4531_CONTROL,
- TSL4531_MODE_NORMAL);
- if (ret < 0)
- return ret;
-
- ret = i2c_smbus_write_byte_data(data->client, TSL4531_CONFIG,
- TSL4531_TCNTRL_400MS);
- if (ret < 0)
- return ret;
-
- indio_dev->dev.parent = &client->dev;
- indio_dev->info = &tsl4531_info;
- indio_dev->channels = tsl4531_channels;
- indio_dev->num_channels = ARRAY_SIZE(tsl4531_channels);
- indio_dev->name = TSL4531_DRV_NAME;
- indio_dev->modes = INDIO_DIRECT_MODE;
-
- return iio_device_register(indio_dev);
-}
-
-static int tsl4531_powerdown(struct i2c_client *client)
-{
- return i2c_smbus_write_byte_data(client, TSL4531_CONTROL,
- TSL4531_MODE_POWERDOWN);
-}
-
-static int tsl4531_remove(struct i2c_client *client)
-{
- iio_device_unregister(i2c_get_clientdata(client));
- tsl4531_powerdown(client);
-
- return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int tsl4531_suspend(struct device *dev)
-{
- return tsl4531_powerdown(to_i2c_client(dev));
-}
-
-static int tsl4531_resume(struct device *dev)
-{
- return i2c_smbus_write_byte_data(to_i2c_client(dev), TSL4531_CONTROL,
- TSL4531_MODE_NORMAL);
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(tsl4531_pm_ops, tsl4531_suspend, tsl4531_resume);
-
-static const struct i2c_device_id tsl4531_id[] = {
- { "tsl4531", 0 },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, tsl4531_id);
-
-static struct i2c_driver tsl4531_driver = {
- .driver = {
- .name = TSL4531_DRV_NAME,
- .pm = &tsl4531_pm_ops,
- .owner = THIS_MODULE,
- },
- .probe = tsl4531_probe,
- .remove = tsl4531_remove,
- .id_table = tsl4531_id,
-};
-
-module_i2c_driver(tsl4531_driver);
-
-MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
-MODULE_DESCRIPTION("TAOS TSL4531 ambient light sensors driver");
-MODULE_LICENSE("GPL");
generated by cgit v0.10.2 at 2024-09-27 18:21:59 (GMT)