iio: si7020: Add devicetree support and trivial bindings

This adds devicetree support for the si7020 iio driver. Since it works
well without requiring any additional property, its compatible string is
added to the trivial i2c devices bindings list.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/Documentation/devicetree/bindings/i2c/trivial-devices.txt b/Documentation/devicetree/bindings/i2c/trivial-devices.txt
index 6e4ba81..03349ad 100644 (file)
--- a/Documentation/devicetree/bindings/i2c/trivial-devices.txt
+++ b/Documentation/devicetree/bindings/i2c/trivial-devices.txt
@@ -152,6 +152,7 @@ ricoh,rv5c387a              I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
 samsung,24ad0xd1       S524AD0XF1 (128K/256K-bit Serial EEPROM for Low Power)
 sgx,vz89x              SGX Sensortech VZ89X Sensors
 sii,s35390a            2-wire CMOS real-time clock
+silabs,si7020          Relative Humidity and Temperature Sensors
 skyworks,sky81452      Skyworks SKY81452: Six-Channel White LED Driver with Touch Panel Bias Supply
 st,24c256              i2c serial eeprom  (24cxx)
 st,m41t00              Serial real-time clock (RTC)

diff --git a/drivers/iio/humidity/si7020.c b/drivers/iio/humidity/si7020.c
index ffc2ccf..345a765 100644 (file)
--- a/drivers/iio/humidity/si7020.c
+++ b/drivers/iio/humidity/si7020.c
@@ -154,8 +154,17 @@ static const struct i2c_device_id si7020_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, si7020_id);
 
+static const struct of_device_id si7020_dt_ids[] = {
+       { .compatible = "silabs,si7020" },
+       { }
+};
+MODULE_DEVICE_TABLE(of, si7020_dt_ids);
+
 static struct i2c_driver si7020_driver = {
-       .driver.name    = "si7020",
+       .driver = {
+               .name = "si7020",
+               .of_match_table = of_match_ptr(si7020_dt_ids),
+       },
        .probe          = si7020_probe,
        .id_table       = si7020_id,
 };