[PATCH 1/2] iio: light: stk3310: add support for stk3013

[Kaustabh Chakraborty <kauschluss@disroot.org>]

Add support for Sensortek's STK3013 in the driver. The part bears the
product ID 0x31.

As seen in [1], Sensortek lists STK3013 as a proximity sensor. But it
has been experimentally observed that they do have ambient light sensing
capabilities. Furthermore, [2] implements a proximity and ambient light
sensor driver for STK3x1x devices, which is also indicative of the fact
that these parts are also ambient light sensors.

[1] https://www.sensortek.com.tw/index.php/en/products/optical-sensor/
[2] https://android.googlesource.com/kernel/msm.git/+/e6dfa4641d88201e8019be19ff557e5d2cf4572f

Signed-off-by: Kaustabh Chakraborty <kauschluss@disroot.org>
---
 drivers/iio/light/stk3310.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c
index e3470d6743ef..003e7c1473d7 100644
--- a/drivers/iio/light/stk3310.c
+++ b/drivers/iio/light/stk3310.c
@@ -35,6 +35,7 @@
 #define STK3310_STATE_EN_ALS			BIT(1)
 #define STK3310_STATE_STANDBY			0x00
 
+#define STK3013_CHIP_ID_VAL			0x31
 #define STK3310_CHIP_ID_VAL			0x13
 #define STK3311_CHIP_ID_VAL			0x1D
 #define STK3311A_CHIP_ID_VAL			0x15
@@ -84,6 +85,7 @@ static const struct reg_field stk3310_reg_field_flag_nf =
 				REG_FIELD(STK3310_REG_FLAG, 0, 0);
 
 static const u8 stk3310_chip_ids[] = {
+	STK3013_CHIP_ID_VAL,
 	STK3310_CHIP_ID_VAL,
 	STK3311A_CHIP_ID_VAL,
 	STK3311S34_CHIP_ID_VAL,
@@ -700,6 +702,7 @@ static DEFINE_SIMPLE_DEV_PM_OPS(stk3310_pm_ops, stk3310_suspend,
 				stk3310_resume);
 
 static const struct i2c_device_id stk3310_i2c_id[] = {
+	{ "STK3013" },
 	{ "STK3310" },
 	{ "STK3311" },
 	{ "STK3335" },
@@ -708,6 +711,7 @@ static const struct i2c_device_id stk3310_i2c_id[] = {
 MODULE_DEVICE_TABLE(i2c, stk3310_i2c_id);
 
 static const struct acpi_device_id stk3310_acpi_id[] = {
+	{"STK3013", 0},
 	{"STK3310", 0},
 	{"STK3311", 0},
 	{}
@@ -716,6 +720,7 @@ static const struct acpi_device_id stk3310_acpi_id[] = {
 MODULE_DEVICE_TABLE(acpi, stk3310_acpi_id);
 
 static const struct of_device_id stk3310_of_match[] = {
+	{ .compatible = "sensortek,stk3013", },
 	{ .compatible = "sensortek,stk3310", },
 	{ .compatible = "sensortek,stk3311", },
 	{ .compatible = "sensortek,stk3335", },
-- 
2.45.2