ARM: dts: mxs: Add iio-hwmon to mx23 soc

This allows to read the SoC on-die temperature sensor available on the LRADC by
using:
 cat /sys/class/hwmon/hwmon0/device/temp1_input

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

diff --git a/arch/arm/boot/dts/imx23.dtsi b/arch/arm/boot/dts/imx23.dtsi
index 581b754..9935e97 100644 (file)
--- a/arch/arm/boot/dts/imx23.dtsi
+++ b/arch/arm/boot/dts/imx23.dtsi
@@ -428,7 +428,7 @@
                                status = "disabled";
                        };
 
-                       lradc@80050000 {
+                       lradc: lradc@80050000 {
                                compatible = "fsl,imx23-lradc";
                                reg = <0x80050000 0x2000>;
                                interrupts = <36 37 38 39 40 41 42 43 44>;
@@ -526,4 +526,9 @@
                        status = "disabled";
                };
        };
+
+       iio_hwmon {
+               compatible = "iio-hwmon";
+               io-channels = <&lradc 8>;
+       };
 };