iio:magnetometer:hmc5843 - add basic dt support

Compatible string, documenation and an optional gpio
for the dataready pin.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/Documentation/devicetree/bindings/iio/magnetometer/hmc5843.txt b/Documentation/devicetree/bindings/iio/magnetometer/hmc5843.txt
new file mode 100644 (file)
index 0000000..90d5f34
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/magnetometer/hmc5843.txt
@@ -0,0 +1,17 @@
+* Honeywell HMC5843 magnetometer sensor
+
+Required properties:
+
+  - compatible : should be "honeywell,hmc5843"
+  - reg : the I2C address of the magnetometer - typically 0x1e
+
+Optional properties:
+
+  - gpios : should be device tree identifier of the magnetometer DRDY pin
+
+Example:
+
+hmc5843@1e {
+        compatible = "honeywell,hmc5843"
+        reg = <0x1e>;
+};

diff --git a/drivers/staging/iio/magnetometer/hmc5843.c b/drivers/staging/iio/magnetometer/hmc5843.c
index 99421f9..bdb0188 100644 (file)
--- a/drivers/staging/iio/magnetometer/hmc5843.c
+++ b/drivers/staging/iio/magnetometer/hmc5843.c
@@ -624,10 +624,17 @@ static const struct i2c_device_id hmc5843_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, hmc5843_id);
 
+static const struct of_device_id hmc5843_of_match[] = {
+       { .compatible = "honeywell,hmc5843" },
+       {}
+};
+MODULE_DEVICE_TABLE(of, hmc5843_of_match);
+
 static struct i2c_driver hmc5843_driver = {
        .driver = {
                .name   = "hmc5843",
                .pm     = HMC5843_PM_OPS,
+               .of_match_table = of_match_ptr(hmc5843_of_match),
        },
        .id_table       = hmc5843_id,
        .probe          = hmc5843_probe,