| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Peter Meerwald-Stadler | 929 | 97.38% | 2 | 40.00% |
| Dan Murphy | 13 | 1.36% | 1 | 20.00% |
| Dan Carpenter | 10 | 1.05% | 1 | 20.00% |
| Thomas Gleixner | 2 | 0.21% | 1 | 20.00% |
| Total | 954 | 5 |
// SPDX-License-Identifier: GPL-2.0-only /* * tsl4531.c - Support for TAOS TSL4531 ambient light sensor * * Copyright 2013 Peter Meerwald <pmeerw@pmeerw.net> * * 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 TSL4531_COMMAND BIT(7) #define TSL4531_CONTROL (TSL4531_COMMAND | 0x00) #define TSL4531_CONFIG (TSL4531_COMMAND | 0x01) #define TSL4531_DATA (TSL4531_COMMAND | 0x04) #define TSL4531_ID (TSL4531_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, }; 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 0; default: return -ENODEV; } } 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); ret = tsl4531_check_id(client); if (ret) { dev_err(&client->dev, "no TSL4531 sensor\n"); return ret; } 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->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); } static SIMPLE_DEV_PM_OPS(tsl4531_pm_ops, tsl4531_suspend, tsl4531_resume); #define TSL4531_PM_OPS (&tsl4531_pm_ops) #else #define TSL4531_PM_OPS NULL #endif 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, }, .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");
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