iio:light:tsl2563: Add DT support

Add Device Tree support for the TSL2563 driver,
document the binding and add AMS-TAOS Inc. to the
list of vendor prefixes.

Signed-off-by: Sebastian Reichel <sre@debian.org>
Acked-by: Kumar Gala <galak@codeaurora.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

3 files changed, 24 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/iio/light/tsl2563.txt b/Documentation/devicetree/bindings/iio/light/tsl2563.txt
new file mode 100644
index 000000000000..f91e809e736e
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/light/tsl2563.txt
@@ -0,0 +1,19 @@
+* AMS TAOS TSL2563 ambient light sensor
+
+Required properties:
+
+  - compatible : should be "amstaos,tsl2563"
+  - reg : the I2C address of the sensor
+
+Optional properties:
+
+  - amstaos,cover-comp-gain : integer used as multiplier for gain
+                              compensation (default = 1)
+
+Example:
+
+tsl2563@29 {
+        compatible = "amstaos,tsl2563";
+        reg = <0x29>;
+        amstaos,cover-comp-gain = <16>;
+};
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index 04eab45dd148..b65a44041ec1 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -9,6 +9,7 @@ aeroflexgaisler	Aeroflex Gaisler AB
 ak      Asahi Kasei Corp.
 altr    Altera Corp.
 amcc    Applied Micro Circuits Corporation (APM, formally AMCC)
+amstaos AMS-Taos Inc.
 apm     Applied Micro Circuits Corporation (APM)
 arm     ARM Ltd.
 atmel   Atmel Corporation
diff --git a/drivers/iio/light/tsl2563.c b/drivers/iio/light/tsl2563.c
index 5e5d9dea22c5..0c6e459c86b1 100644
--- a/drivers/iio/light/tsl2563.c
+++ b/drivers/iio/light/tsl2563.c
@@ -714,6 +714,7 @@ static int tsl2563_probe(struct i2c_client *client,
         struct iio_dev *indio_dev;
         struct tsl2563_chip *chip;
         struct tsl2563_platform_data *pdata = client->dev.platform_data;
+        struct device_node *np = client->dev.of_node;
         int err = 0;
         u8 id = 0;
 
@@ -750,6 +751,9 @@ static int tsl2563_probe(struct i2c_client *client,
 
         if (pdata)
                 chip->cover_comp_gain = pdata->cover_comp_gain;
+        else if (np)
+                of_property_read_u32(np, "amstaos,cover-comp-gain",
+                                     &chip->cover_comp_gain);
         else
                 chip->cover_comp_gain = 1;