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iio: ltr501: Add support for ltr301 chip 

Added support for Liteon 301 Ambient light sensor. Since
LTR-301 and LTR-501 are register compatible(and even have same
part id), LTR-501 driver has been extended to support both
devices. LTR-501 is similar to LTR-301 in ALS sensing, But the
only difference is, LTR-501 also supports proximity sensing.

LTR-501 - ALS + Proximity combo
LTR-301 - ALS sensor.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Daniel Baluta 2015-04-21 19:11:00 +03:00 committed by Jonathan Cameron
parent 8592a7eefa
commit 035ebb1510
2 changed files with 73 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/iio/light/Kconfig
View File

@ -170,7 +170,7 @@ config LTR501
help
If you say yes here you get support for the Lite-On LTR-501ALS-01
ambient light and proximity sensor. This driver also supports LTR-559
ALS/PS sensor.
ALS/PS or LTR-301 ALS sensors.
This driver can also be built as a module. If so, the module
will be called ltr501.

76
drivers/iio/light/ltr501.c
View File

@ -93,6 +93,7 @@ struct ltr501_samp_table {
enum {
ltr501 = 0,
ltr559,
ltr301,
};
struct ltr501_gain {
@ -139,6 +140,10 @@ struct ltr501_chip_info {
u8 als_mode_active;
u8 als_gain_mask;
u8 als_gain_shift;
struct iio_chan_spec const *channels;
const int no_channels;
const struct iio_info *info;
const struct iio_info *info_no_irq;
};
struct ltr501_data {
@ -570,6 +575,18 @@ static const struct iio_chan_spec ltr501_channels[] = {
IIO_CHAN_SOFT_TIMESTAMP(3),
};
static const struct iio_chan_spec ltr301_channels[] = {
LTR501_INTENSITY_CHANNEL(0, LTR501_ALS_DATA0, IIO_MOD_LIGHT_BOTH, 0,
ltr501_als_event_spec,
ARRAY_SIZE(ltr501_als_event_spec)),
LTR501_INTENSITY_CHANNEL(1, LTR501_ALS_DATA1, IIO_MOD_LIGHT_IR,
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_INT_TIME) |
BIT(IIO_CHAN_INFO_SAMP_FREQ),
NULL, 0),
IIO_CHAN_SOFT_TIMESTAMP(2),
};
static int ltr501_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val, int *val2, long mask)
@ -1040,10 +1057,21 @@ static struct attribute *ltr501_attributes[] = {
NULL
};
static struct attribute *ltr301_attributes[] = {
&iio_dev_attr_in_intensity_scale_available.dev_attr.attr,
&iio_const_attr_integration_time_available.dev_attr.attr,
&iio_const_attr_sampling_frequency_available.dev_attr.attr,
NULL
};
static const struct attribute_group ltr501_attribute_group = {
.attrs = ltr501_attributes,
};
static const struct attribute_group ltr301_attribute_group = {
.attrs = ltr301_attributes,
};
static const struct iio_info ltr501_info_no_irq = {
.read_raw = ltr501_read_raw,
.write_raw = ltr501_write_raw,
@ -1062,6 +1090,24 @@ static const struct iio_info ltr501_info = {
.driver_module = THIS_MODULE,
};
static const struct iio_info ltr301_info_no_irq = {
.read_raw = ltr501_read_raw,
.write_raw = ltr501_write_raw,
.attrs = &ltr301_attribute_group,
.driver_module = THIS_MODULE,
};
static const struct iio_info ltr301_info = {
.read_raw = ltr501_read_raw,
.write_raw = ltr501_write_raw,
.attrs = &ltr301_attribute_group,
.read_event_value = &ltr501_read_event,
.write_event_value = &ltr501_write_event,
.read_event_config = &ltr501_read_event_config,
.write_event_config = &ltr501_write_event_config,
.driver_module = THIS_MODULE,
};
static struct ltr501_chip_info ltr501_chip_info_tbl[] = {
[ltr501] = {
.partid = 0x08,
@ -1072,6 +1118,10 @@ static struct ltr501_chip_info ltr501_chip_info_tbl[] = {
.als_mode_active = BIT(0) | BIT(1),
.als_gain_mask = BIT(3),
.als_gain_shift = 3,
.info = &ltr501_info,
.info_no_irq = &ltr501_info_no_irq,
.channels = ltr501_channels,
.no_channels = ARRAY_SIZE(ltr501_channels),
},
[ltr559] = {
.partid = 0x09,
@ -1082,6 +1132,22 @@ static struct ltr501_chip_info ltr501_chip_info_tbl[] = {
.als_mode_active = BIT(1),
.als_gain_mask = BIT(2) | BIT(3) | BIT(4),
.als_gain_shift = 2,
.info = &ltr501_info,
.info_no_irq = &ltr501_info_no_irq,
.channels = ltr501_channels,
.no_channels = ARRAY_SIZE(ltr501_channels),
},
[ltr301] = {
.partid = 0x08,
.als_gain = ltr501_als_gain_tbl,
.als_gain_tbl_size = ARRAY_SIZE(ltr501_als_gain_tbl),
.als_mode_active = BIT(0) | BIT(1),
.als_gain_mask = BIT(3),
.als_gain_shift = 3,
.info = &ltr301_info,
.info_no_irq = &ltr301_info_no_irq,
.channels = ltr301_channels,
.no_channels = ARRAY_SIZE(ltr301_channels),
},
};
@ -1338,8 +1404,9 @@ static int ltr501_probe(struct i2c_client *client,
return -ENODEV;
indio_dev->dev.parent = &client->dev;
indio_dev->channels = ltr501_channels;
indio_dev->num_channels = ARRAY_SIZE(ltr501_channels);
indio_dev->info = data->chip_info->info;
indio_dev->channels = data->chip_info->channels;
indio_dev->num_channels = data->chip_info->no_channels;
indio_dev->name = name;
indio_dev->modes = INDIO_DIRECT_MODE;
@ -1348,7 +1415,6 @@ static int ltr501_probe(struct i2c_client *client,
return ret;
if (client->irq > 0) {
indio_dev->info = &ltr501_info;
ret = devm_request_threaded_irq(&client->dev, client->irq,
NULL, ltr501_interrupt_handler,
IRQF_TRIGGER_FALLING |
@ -1361,7 +1427,7 @@ static int ltr501_probe(struct i2c_client *client,
return ret;
}
} else {
indio_dev->info = &ltr501_info_no_irq;
indio_dev->info = data->chip_info->info_no_irq;
}
ret = iio_triggered_buffer_setup(indio_dev, NULL,
@ -1416,6 +1482,7 @@ static SIMPLE_DEV_PM_OPS(ltr501_pm_ops, ltr501_suspend, ltr501_resume);
static const struct acpi_device_id ltr_acpi_match[] = {
{"LTER0501", ltr501},
{"LTER0559", ltr559},
{"LTER0301", ltr301},
{ },
};
MODULE_DEVICE_TABLE(acpi, ltr_acpi_match);
@ -1423,6 +1490,7 @@ MODULE_DEVICE_TABLE(acpi, ltr_acpi_match);
static const struct i2c_device_id ltr501_id[] = {
{ "ltr501", ltr501},
{ "ltr559", ltr559},
{ "ltr301", ltr301},
{ }
};
MODULE_DEVICE_TABLE(i2c, ltr501_id);