ARM: dts: vf610-twr: Add ADC support

vf610 has two ADC controllers, and vf610-twr board ADC0_SE5 pin connect
to sliding rheostat for ADC test, other ADC pins connect to connectors for
future use.

Add support for ADC0_SE5.

CC: Jonathan Cameron <jic23@kernel.org>
CC: Mark Rutland <mark.rutland@arm.com>
CC: Otavio Salvador <otavio@ossystems.com.br>
CC: Peter Meerwald <pmeerw@pmeerw.net>
CC: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/vf610-twr.dts b/arch/arm/boot/dts/vf610-twr.dts
index da52ed7eefa2..7dd1d6ede525 100644
--- a/arch/arm/boot/dts/vf610-twr.dts
+++ b/arch/arm/boot/dts/vf610-twr.dts
@@ -47,6 +47,14 @@
                         regulator-max-microvolt = <3300000>;
                         regulator-always-on;
                 };
+
+                reg_vcc_3v3_mcu: regulator@1 {
+                        compatible = "regulator-fixed";
+                        reg = <1>;
+                        regulator-name = "vcc_3v3_mcu";
+                        regulator-min-microvolt = <3300000>;
+                        regulator-max-microvolt = <3300000>;
+                };
         };
 
         sound {
@@ -79,6 +87,13 @@
         };
 };
 
+&adc0 {
+        pinctrl-names = "default";
+        pinctrl-0 = <&pinctrl_adc0_ad5>;
+        vref-supply = <&reg_vcc_3v3_mcu>;
+        status = "okay";
+};
+
 &dspi0 {
         bus-num = <0>;
         pinctrl-names = "default";
@@ -128,6 +143,12 @@
 
 &iomuxc {
         vf610-twr {
+                pinctrl_adc0_ad5: adc0ad5grp {
+                        fsl,pins = <
+                                VF610_PAD_PTC30__ADC0_SE5               0xa1
+                        >;
+                };
+
                 pinctrl_dspi0: dspi0grp {
                         fsl,pins = <
                                 VF610_PAD_PTB19__DSPI0_CS0              0x1182