Hi Jonathan,
Please don't push this patchset until I test it. I will let you know once
I am done.
> 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@xxxxxxxxxxxxxxx>
> Signed-off-by: Daniel Baluta <daniel.baluta@xxxxxxxxx>
> ---
> drivers/iio/light/Kconfig | 2 +-
> drivers/iio/light/ltr501.c | 76
> +++++++++++++++++++++++++++++++++++++++++++---
> 2 files changed, 73 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
> index 16a0ba1..a437bad 100644
> --- a/drivers/iio/light/Kconfig
> +++ b/drivers/iio/light/Kconfig
> @@ -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.
> diff --git a/drivers/iio/light/ltr501.c b/drivers/iio/light/ltr501.c
> index 92da514..ca4bf47 100644
> --- a/drivers/iio/light/ltr501.c
> +++ b/drivers/iio/light/ltr501.c
> @@ -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 = <r301_attribute_group,
> + .driver_module = THIS_MODULE,
> +};
> +
> +static const struct iio_info ltr301_info = {
> + .read_raw = ltr501_read_raw,
> + .write_raw = ltr501_write_raw,
> + .attrs = <r301_attribute_group,
> + .read_event_value = <r501_read_event,
> + .write_event_value = <r501_write_event,
> + .read_event_config = <r501_read_event_config,
> + .write_event_config = <r501_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 = <r501_info,
> + .info_no_irq = <r501_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 = <r501_info,
> + .info_no_irq = <r501_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 = <r301_info,
> + .info_no_irq = <r301_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 = <r501_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 = <r501_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);
> --
> 1.9.1
>
> --
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>
--
Sathyanarayanan Kuppuswamy
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