[PATCH v1 2/2] iio: light: ltr501: Add support for the LTR-659PS-01 proximity sensor

[Svyatoslav Ryhel <clamor95@gmail.com>]

Add support for the Lite-On LTR-659PS-01 proximity sensor. This device is
nearly identical to the LTR-559ALS-01, but omits all elements related to
ambient light sensing (Even the regmap is identical, but ALS registers are
marked as reserved and interactions with them are discouraged).

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
 drivers/iio/light/ltr501.c | 58 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/drivers/iio/light/ltr501.c b/drivers/iio/light/ltr501.c
index 302be2fc314c5..5cc1141322ad5 100644
--- a/drivers/iio/light/ltr501.c
+++ b/drivers/iio/light/ltr501.c
@@ -96,6 +96,7 @@ enum {
 	ltr329,
 	ltr501,
 	ltr559,
+	ltr659,
 };
 
 struct ltr501_gain {
@@ -649,6 +650,26 @@ static const struct iio_chan_spec ltr301_channels[] = {
 	IIO_CHAN_SOFT_TIMESTAMP(2),
 };
 
+static const struct iio_chan_spec ltr659_channels[] = {
+	{
+		.type = IIO_PROXIMITY,
+		.address = LTR501_PS_DATA,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				      BIT(IIO_CHAN_INFO_SCALE),
+		.scan_index = 0,
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 11,
+			.storagebits = 16,
+			.endianness = IIO_CPU,
+		},
+		.event_spec = ltr501_pxs_event_spec,
+		.num_event_specs = ARRAY_SIZE(ltr501_pxs_event_spec),
+		.ext_info = ltr501_ext_info,
+	},
+	IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
 static int ltr501_read_info_raw(struct ltr501_data *data,
 				struct iio_chan_spec const *chan,
 				int *val)
@@ -1178,6 +1199,12 @@ static struct attribute *ltr301_attributes[] = {
 	NULL
 };
 
+static struct attribute *ltr659_attributes[] = {
+	&iio_dev_attr_in_proximity_scale_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,
 };
@@ -1186,6 +1213,10 @@ static const struct attribute_group ltr301_attribute_group = {
 	.attrs = ltr301_attributes,
 };
 
+static const struct attribute_group ltr659_attribute_group = {
+	.attrs = ltr659_attributes,
+};
+
 static const struct iio_info ltr501_info_no_irq = {
 	.read_raw = ltr501_read_raw,
 	.write_raw = ltr501_write_raw,
@@ -1218,6 +1249,22 @@ static const struct iio_info ltr301_info = {
 	.write_event_config	= &ltr501_write_event_config,
 };
 
+static const struct iio_info ltr659_info_no_irq = {
+	.read_raw = ltr501_read_raw,
+	.write_raw = ltr501_write_raw,
+	.attrs = &ltr659_attribute_group,
+};
+
+static const struct iio_info ltr659_info = {
+	.read_raw = ltr501_read_raw,
+	.write_raw = ltr501_write_raw,
+	.attrs = &ltr659_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,
+};
+
 static const struct ltr501_chip_info ltr501_chip_info_tbl[] = {
 	[ltr301] = {
 		.partid = 0x08,
@@ -1283,6 +1330,15 @@ static const struct ltr501_chip_info ltr501_chip_info_tbl[] = {
 		.channels = ltr501_channels,
 		.no_channels = ARRAY_SIZE(ltr501_channels),
 	},
+	[ltr659] = {
+		.partid = 0x09,
+		.ps_gain = ltr559_ps_gain_tbl,
+		.ps_gain_tbl_size = ARRAY_SIZE(ltr559_ps_gain_tbl),
+		.info = &ltr659_info,
+		.info_no_irq = &ltr659_info_no_irq,
+		.channels = ltr659_channels,
+		.no_channels = ARRAY_SIZE(ltr659_channels),
+	},
 };
 
 static int ltr501_write_contr(struct ltr501_data *data, u8 als_val, u8 ps_val)
@@ -1635,6 +1691,7 @@ static const struct i2c_device_id ltr501_id[] = {
 	{ .name = "ltr329", .driver_data = ltr329 },
 	{ .name = "ltr501", .driver_data = ltr501 },
 	{ .name = "ltr559", .driver_data = ltr559 },
+	{ .name = "ltr659", .driver_data = ltr659 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, ltr501_id);
@@ -1645,6 +1702,7 @@ static const struct of_device_id ltr501_of_match[] = {
 	{ .compatible = "liteon,ltr329", },
 	{ .compatible = "liteon,ltr501", },
 	{ .compatible = "liteon,ltr559", },
+	{ .compatible = "liteon,ltr659", },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, ltr501_of_match);
-- 
2.53.0