This driver is based on drivers/iio/light/al3320a.c Differences form the original file: - Difference REG map - Difference scale Signed-off-by: Rocky Hsiao <rocky.hsiao@xxxxxxxxxxxxxx> --- drivers/iio/light/Kconfig | 10 ++ drivers/iio/light/Makefile | 1 + drivers/iio/light/al3010.c | 292 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 303 insertions(+) create mode 100644 drivers/iio/light/al3010.c diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig index ca89b26..57a2a7e 100644 --- a/drivers/iio/light/Kconfig +++ b/drivers/iio/light/Kconfig @@ -40,6 +40,16 @@ config AL3320A To compile this driver as a module, choose M here: the module will be called al3320a. +config AL3010 + tristate "AL3010 ambient light sensor" + depends on I2C + help + Say Y here if you want to build a driver for the Dyna Image AL3010 + ambient light sensor. + + To compile this driver as a module, choose M here: the + module will be called al3010. + config APDS9300 tristate "APDS9300 ambient light sensor" depends on I2C diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile index 5df1118..3f615d7 100644 --- a/drivers/iio/light/Makefile +++ b/drivers/iio/light/Makefile @@ -5,6 +5,7 @@ # When adding new entries keep the list in alphabetical order obj-$(CONFIG_ACPI_ALS) += acpi-als.o obj-$(CONFIG_ADJD_S311) += adjd_s311.o +obj-$(CONFIG_AL3010) += al3010.o obj-$(CONFIG_AL3320A) += al3320a.o obj-$(CONFIG_APDS9300) += apds9300.o obj-$(CONFIG_APDS9960) += apds9960.o diff --git a/drivers/iio/light/al3010.c b/drivers/iio/light/al3010.c new file mode 100644 index 0000000..84da37c --- /dev/null +++ b/drivers/iio/light/al3010.c @@ -0,0 +1,292 @@ +/* + * AL3010A - Dyna Image Ambient Light Sensor + * + * Copyright (c) 2014, Intel Corporation. + * + * 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 AL3010 (7-bit I2C slave address 0x1C). + * + * TODO: interrupt support, thresholds + * + * This driver is base on the original driver for AL3320A that was distributed + * by Intel Corporation. + * + * last change: 2016/06/03 + * editor: Rocky Hsiao <rocky.hsiao@xxxxxxxxxxxxxx> + * + * Datasheet: + * http://www.dyna-image.com/english/product/optical-sensor-detail.php?cpid=1&dpid=10#doc + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/i2c.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> + +#define AL3010_DRV_NAME "al3010" + +#define AL3010_REG_SYSTEM 0x00 +#define AL3010_REG_CONFIG 0x10 +#define AL3010_REG_DATA_LOW 0x0c + +#define AL3010_GAIN_MASK (BIT(6) | BIT(5) | BIT(4)) +#define AL3010_GAIN_SHIFT 4 + +#define AL3010_CONFIG_DISABLE 0x00 +#define AL3010_CONFIG_ENABLE 0x01 + +#define AL3010_SCALE_AVAILABLE "1.1872 0.2968 0.0742 0.0186" + +enum al3010_range { + AL3010_RANGE_1, /* 77806 lx */ + AL3010_RANGE_2, /* 19452 lx */ + AL3010_RANGE_3, /* 4863 lx */ + AL3010_RANGE_4 /* 1216 lx */ +}; + +static const int al3010_scales[][2] = { + {0, 1187200}, {0, 296800}, {0, 74200}, {0, 18600} +}; + +struct al3010_data { + struct i2c_client *client; +}; + +static const struct iio_chan_spec al3010_channels[] = { + { + .type = IIO_LIGHT, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + } +}; + +static int al3010_set_gain(struct al3010_data *data, int gain) +{ + int ret; + + ret = i2c_smbus_write_byte_data(data->client, AL3010_REG_CONFIG, + (gain<<AL3010_GAIN_SHIFT)&AL3010_GAIN_MASK); + + return ret; +} + +static int al3010_set_mode(struct al3010_data *data, int mode) +{ + int ret; + + ret = i2c_smbus_write_byte_data(data->client, AL3010_REG_SYSTEM, mode); + + return ret; +} + +static int al3010_get_mode(struct al3010_data *data) +{ + int ret; + + ret = i2c_smbus_read_byte_data(data->client, AL3010_REG_SYSTEM); + + return ret; +} + +static int al3010_get_adc_value(struct al3010_data *data) +{ + int ret; + + ret = i2c_smbus_read_word_data(data->client, AL3010_REG_DATA_LOW); + + return ret; +} + +static int al3010_get_lux(struct al3010_data *data) +{ + int ret; + long int ret64; + + ret = al3010_get_adc_value(data); + ret64 = ret; + ret64 = (ret64 * 74200) / 1000000; + ret = ret64; + + return ret; +} + +/* lux */ +static ssize_t al3010_show_lux(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct al3010_data *data = iio_priv(dev_to_iio_dev(dev)); + int ret; + + /* No LUX data if not operational */ + if (al3010_get_mode(data) != AL3010_CONFIG_ENABLE) + return -EBUSY; + + ret = al3010_get_lux(data); + + return sprintf(buf, "%d\n", ret); +} + +static IIO_CONST_ATTR(in_illuminance_scale_available, AL3010_SCALE_AVAILABLE); + +static DEVICE_ATTR(illuminance0_input, S_IRUGO, al3010_show_lux, NULL); + +static struct attribute *al3010_attributes[] = { + &dev_attr_illuminance0_input.attr, + &iio_const_attr_in_illuminance_scale_available.dev_attr.attr, + NULL, +}; + +static const struct attribute_group al3010_attribute_group = { + .attrs = al3010_attributes, +}; + +static int al3010_init(struct al3010_data *data) +{ + int err = 0; + + err = al3010_set_mode(data, AL3010_CONFIG_ENABLE); + if (err) { + dev_err(&data->client->dev, + "%s: al3010_set_mode returned error %d\n", + __func__, err); + return err; + } + + /* + * set sensor range to 4863 lux. + * (If panel luminousness is 10% , the range of pad is 0 ~ 48630 lux.) + */ + err = al3010_set_gain(data, AL3010_RANGE_3); + if (err) { + dev_err(&data->client->dev, + "%s: al3010_set_range returned error %d\n", + __func__, err); + return err; + } + + return 0; +} + +static int al3010_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, + int *val2, long mask) +{ + struct al3010_data *data = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + /* + * ALS ADC value is stored in two adjacent registers: + * - low byte of output is stored at AL3320A_REG_DATA_LOW + * - high byte of output is stored at AL3320A_REG_DATA_LOW + 1 + */ + ret = i2c_smbus_read_word_data(data->client, + AL3010_REG_DATA_LOW); + if (ret < 0) + return ret; + *val = ret; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + ret = i2c_smbus_read_byte_data(data->client, + AL3010_REG_CONFIG); + if (ret < 0) + return ret; + + ret = (ret & AL3010_GAIN_MASK) >> AL3010_GAIN_SHIFT; + *val = al3010_scales[ret][0]; + *val2 = al3010_scales[ret][1]; + + return IIO_VAL_INT_PLUS_MICRO; + } + return -EINVAL; +} + +static int al3010_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, + int val2, long mask) +{ + struct al3010_data *data = iio_priv(indio_dev); + int i; + + switch (mask) { + case IIO_CHAN_INFO_SCALE: + for (i = 0; i < ARRAY_SIZE(al3010_scales); i++) { + if (val == al3010_scales[i][0] && + val2 == al3010_scales[i][1]) + return al3010_set_gain(data, i); + } + break; + } + return -EINVAL; +} + +static const struct iio_info al3010_info = { + .driver_module = THIS_MODULE, + .read_raw = al3010_read_raw, + .write_raw = al3010_write_raw, + .attrs = &al3010_attribute_group, +}; + +static int al3010_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct al3010_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; + + indio_dev->dev.parent = &client->dev; + indio_dev->info = &al3010_info; + indio_dev->name = AL3010_DRV_NAME; + indio_dev->channels = al3010_channels; + indio_dev->num_channels = ARRAY_SIZE(al3010_channels); + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = al3010_init(data); + if (ret < 0) { + dev_err(&client->dev, "al3010 chip init failed\n"); + return ret; + } + + return devm_iio_device_register(&client->dev, indio_dev); +} + +static int al3010_remove(struct i2c_client *client) +{ + return i2c_smbus_write_byte_data(client, AL3010_REG_SYSTEM, 0x00); +} + +static const struct i2c_device_id al3010_id[] = { + {"al3010", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, al3010_id); + +static struct i2c_driver al3010_driver = { + .driver = { + .name = AL3010_DRV_NAME, + }, + .probe = al3010_probe, + .remove = al3010_remove, + .id_table = al3010_id, +}; + +module_i2c_driver(al3010_driver); + +MODULE_AUTHOR("Rocky Hsiao <rocky.hsiao@xxxxxxxxxxxxxx"); +MODULE_DESCRIPTION("AL3010 Ambient Light Sensor driver"); +MODULE_LICENSE("GPL v2"); + -- 2.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
