From f4b7f751c6fd2bd7e6d3a83385ee292c39995bdb Mon Sep 17 00:00:00 2001 From: Jacek Anaszewski Date: Tue, 7 May 2013 11:41:00 +0100 Subject: [PATCH] iio:ak8975 Add support for gpios DT property Add support for parsing 'gpios' property when initializing from oftree. This patch adds also the binding documentation file. Signed-off-by: Jacek Anaszewski Signed-off-by: Kyungmin Park Signed-off-by: Jonathan Cameron --- .../bindings/iio/magnetometer/ak8975.txt | 18 ++++++++++++++++++ drivers/iio/magnetometer/ak8975.c | 12 +++++++++--- 2 files changed, 27 insertions(+), 3 deletions(-) create mode 100644 Documentation/devicetree/bindings/iio/magnetometer/ak8975.txt diff --git a/Documentation/devicetree/bindings/iio/magnetometer/ak8975.txt b/Documentation/devicetree/bindings/iio/magnetometer/ak8975.txt new file mode 100644 index 000000000000..011679f1a425 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/magnetometer/ak8975.txt @@ -0,0 +1,18 @@ +* AsahiKASEI AK8975 magnetometer sensor + +Required properties: + + - compatible : should be "asahi-kasei,ak8975" + - reg : the I2C address of the magnetometer + +Optional properties: + + - gpios : should be device tree identifier of the magnetometer DRDY pin + +Example: + +ak8975@0c { + compatible = "asahi-kasei,ak8975"; + reg = <0x0c>; + gpios = <&gpj0 7 0>; +}; diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c index af6c320a534e..d75cc23e8ae7 100644 --- a/drivers/iio/magnetometer/ak8975.c +++ b/drivers/iio/magnetometer/ak8975.c @@ -29,6 +29,7 @@ #include #include +#include #include #include @@ -384,10 +385,15 @@ static int ak8975_probe(struct i2c_client *client, int err; /* Grab and set up the supplied GPIO. */ - if (client->dev.platform_data == NULL) - eoc_gpio = -1; - else + if (client->dev.platform_data) eoc_gpio = *(int *)(client->dev.platform_data); + else if (client->dev.of_node) + eoc_gpio = of_get_gpio(client->dev.of_node, 0); + else + eoc_gpio = -1; + + if (eoc_gpio == -EPROBE_DEFER) + return -EPROBE_DEFER; /* We may not have a GPIO based IRQ to scan, that is fine, we will poll if so */ -- 2.20.1