linux-kernel - [PATCHv2] iio:light:tsl2563: Add DT support

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Message-Id: <1382624835-10228-1-git-send-email-sre@debian.org>
Date:	Thu, 24 Oct 2013 16:27:15 +0200
From:	Sebastian Reichel <sre@...ian.org>
To:	Sebastian Reichel <sre@...g0.de>, linux-iio@...r.kernel.org
Cc:	Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Rob Landley <rob@...dley.net>,
	Jonathan Cameron <jic23@....ac.uk>,
	Sebastian Reichel <sre@...ian.org>,
	Peter Meerwald <pmeerw@...erw.net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Bill Pemberton <wfp5p@...ginia.edu>,
	Sachin Kamat <sachin.kamat@...aro.org>,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCHv2] iio:light:tsl2563: Add DT support

Add Device Tree support for the TSL2563 driver
and document the binding.

Signed-off-by: Sebastian Reichel <sre@...ian.org>
---
 .../devicetree/bindings/iio/light/tsl2563.txt         | 19 +++++++++++++++++++
 Documentation/devicetree/bindings/vendor-prefixes.txt |  1 +
 drivers/iio/light/tsl2563.c                           |  4 ++++
 3 files changed, 24 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/light/tsl2563.txt

diff --git a/Documentation/devicetree/bindings/iio/light/tsl2563.txt b/Documentation/devicetree/bindings/iio/light/tsl2563.txt
new file mode 100644
index 0000000..f91e809
--- /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 2cc3dad..d26c834 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 ebb962c..261660a 100644
--- a/drivers/iio/light/tsl2563.c
+++ b/drivers/iio/light/tsl2563.c
@@ -699,6 +699,7 @@ 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;
 
@@ -735,6 +736,9 @@ 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_index(np, "amstaos,cover-comp-gain", 0,
+							&chip->cover_comp_gain);
 	else
 		chip->cover_comp_gain = 1;
 
-- 
1.8.4.rc3

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