iio: light: add Dyna-Image AL3010 driver
Based on: - 3320A in-kernel driver - https://www.spinics.net/lists/linux-iio/msg25145.html - https://lore.kernel.org/patchwork/patch/684179/ I decided to keep it aside of AL3320A due to different approach and much simpler design of 3010. Tested on Nexus 7 2012 (grouper/tilapia). Tested-by: David Heidelberg <david@ixit.cz> Tested-by: Dmitry Osipenko <digetx@gmail.com> Tested-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Reviewed-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: David Heidelberg <david@ixit.cz> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
parent
58d22a911d
commit
c36b5195ab
|
@ -43,6 +43,16 @@ config ADUX1020
|
|||
To compile this driver as a module, choose M here: the
|
||||
module will be called adux1020.
|
||||
|
||||
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 AL3320A
|
||||
tristate "AL3320A ambient light sensor"
|
||||
depends on I2C
|
||||
|
|
|
@ -7,6 +7,7 @@
|
|||
obj-$(CONFIG_ACPI_ALS) += acpi-als.o
|
||||
obj-$(CONFIG_ADJD_S311) += adjd_s311.o
|
||||
obj-$(CONFIG_ADUX1020) += adux1020.o
|
||||
obj-$(CONFIG_AL3010) += al3010.o
|
||||
obj-$(CONFIG_AL3320A) += al3320a.o
|
||||
obj-$(CONFIG_APDS9300) += apds9300.o
|
||||
obj-$(CONFIG_APDS9960) += apds9960.o
|
||||
|
|
242
drivers/iio/light/al3010.c
Normal file
242
drivers/iio/light/al3010.c
Normal file
|
@ -0,0 +1,242 @@
|
|||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
/*
|
||||
* AL3010 - Dyna Image Ambient Light Sensor
|
||||
*
|
||||
* Copyright (c) 2014, Intel Corporation.
|
||||
* Copyright (c) 2016, Dyna-Image Corp.
|
||||
* Copyright (c) 2020, David Heidelberg, Michał Mirosław, Dmitry Osipenko
|
||||
*
|
||||
* IIO driver for AL3010 (7-bit I2C slave address 0x1C).
|
||||
*
|
||||
* TODO: interrupt support, thresholds
|
||||
* When the driver will get support for interrupt handling, then interrupt
|
||||
* will need to be disabled before turning sensor OFF in order to avoid
|
||||
* potential races with the interrupt handling.
|
||||
*/
|
||||
|
||||
#include <linux/bitfield.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of.h>
|
||||
|
||||
#include <linux/iio/iio.h>
|
||||
#include <linux/iio/sysfs.h>
|
||||
|
||||
#define AL3010_DRV_NAME "al3010"
|
||||
|
||||
#define AL3010_REG_SYSTEM 0x00
|
||||
#define AL3010_REG_DATA_LOW 0x0c
|
||||
#define AL3010_REG_CONFIG 0x10
|
||||
|
||||
#define AL3010_CONFIG_DISABLE 0x00
|
||||
#define AL3010_CONFIG_ENABLE 0x01
|
||||
|
||||
#define AL3010_GAIN_MASK GENMASK(6,4)
|
||||
|
||||
#define AL3010_SCALE_AVAILABLE "1.1872 0.2968 0.0742 0.018"
|
||||
|
||||
enum al3xxxx_range {
|
||||
AL3XXX_RANGE_1, /* 77806 lx */
|
||||
AL3XXX_RANGE_2, /* 19542 lx */
|
||||
AL3XXX_RANGE_3, /* 4863 lx */
|
||||
AL3XXX_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 IIO_CONST_ATTR(in_illuminance_scale_available, AL3010_SCALE_AVAILABLE);
|
||||
|
||||
static struct attribute *al3010_attributes[] = {
|
||||
&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_set_pwr(struct i2c_client *client, bool pwr)
|
||||
{
|
||||
u8 val = pwr ? AL3010_CONFIG_ENABLE : AL3010_CONFIG_DISABLE;
|
||||
return i2c_smbus_write_byte_data(client, AL3010_REG_SYSTEM, val);
|
||||
}
|
||||
|
||||
static void al3010_set_pwr_off(void *_data)
|
||||
{
|
||||
struct al3010_data *data = _data;
|
||||
|
||||
al3010_set_pwr(data->client, false);
|
||||
}
|
||||
|
||||
static int al3010_init(struct al3010_data *data)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = al3010_set_pwr(data->client, true);
|
||||
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = i2c_smbus_write_byte_data(data->client, AL3010_REG_CONFIG,
|
||||
FIELD_PREP(AL3010_GAIN_MASK,
|
||||
AL3XXX_RANGE_3));
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
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 AL3010_REG_DATA_LOW
|
||||
* - high byte of output is stored at AL3010_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 = FIELD_GET(AL3010_GAIN_MASK, ret);
|
||||
*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])
|
||||
continue;
|
||||
|
||||
return i2c_smbus_write_byte_data(data->client,
|
||||
AL3010_REG_CONFIG,
|
||||
FIELD_PREP(AL3010_GAIN_MASK, i));
|
||||
}
|
||||
break;
|
||||
}
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static const struct iio_info al3010_info = {
|
||||
.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;
|
||||
}
|
||||
|
||||
ret = devm_add_action_or_reset(&client->dev,
|
||||
al3010_set_pwr_off,
|
||||
data);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
return devm_iio_device_register(&client->dev, indio_dev);
|
||||
}
|
||||
|
||||
static int __maybe_unused al3010_suspend(struct device *dev)
|
||||
{
|
||||
return al3010_set_pwr(to_i2c_client(dev), false);
|
||||
}
|
||||
|
||||
static int __maybe_unused al3010_resume(struct device *dev)
|
||||
{
|
||||
return al3010_set_pwr(to_i2c_client(dev), true);
|
||||
}
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(al3010_pm_ops, al3010_suspend, al3010_resume);
|
||||
|
||||
static const struct i2c_device_id al3010_id[] = {
|
||||
{"al3010", },
|
||||
{}
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, al3010_id);
|
||||
|
||||
static const struct of_device_id al3010_of_match[] = {
|
||||
{ .compatible = "dynaimage,al3010", },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, al3010_of_match);
|
||||
|
||||
static struct i2c_driver al3010_driver = {
|
||||
.driver = {
|
||||
.name = AL3010_DRV_NAME,
|
||||
.of_match_table = al3010_of_match,
|
||||
.pm = &al3010_pm_ops,
|
||||
},
|
||||
.probe = al3010_probe,
|
||||
.id_table = al3010_id,
|
||||
};
|
||||
module_i2c_driver(al3010_driver);
|
||||
|
||||
MODULE_AUTHOR("Daniel Baluta <daniel.baluta@nxp.com>");
|
||||
MODULE_AUTHOR("David Heidelberg <david@ixit.cz>");
|
||||
MODULE_DESCRIPTION("AL3010 Ambient Light Sensor driver");
|
||||
MODULE_LICENSE("GPL v2");
|
Loading…
Reference in a new issue