[PATCH v3 4/5] ARM: at91/dt: sama5d2 Xplained: enable the adc device

[Ludovic Desroches]

Enable the adc on the sama5d2 Xplained board.

Signed-off-by: Ludovic Desroches <ludovic.desroches at atmel.com>
---
 arch/arm/boot/dts/at91-sama5d2_xplained.dts | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm/boot/dts/at91-sama5d2_xplained.dts b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
index 77ddff0..c3102a0 100644
--- a/arch/arm/boot/dts/at91-sama5d2_xplained.dts
+++ b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
@@ -261,7 +261,29 @@
 				};
 			};
 
+			adc: adc at fc030000 {
+				vddana-supply = <&vdd_3v3_lp_reg>;
+				vref-supply = <&vdd_3v3_lp_reg>;
+				pinctrl-names = "default";
+				pinctrl-0 = <&pinctrl_adc_default>;
+				status = "okay";
+			};
+
 			pinctrl at fc038000 {
+				/*
+				 * There is no real pinmux for ADC, if the pin
+				 * is not requested by another peripheral then
+				 * the muxing is done when channel is enabled.
+				 * Requesting pins for ADC is GPIO is
+				 * encouraged to prevent conflicts and to
+				 * disable bias in order to be in the same
+				 * state when the pin is not muxed to the adc.
+				 */
+				pinctrl_adc_default: adc_default {
+					pinmux = <PIN_PD23__GPIO>;
+					bias-disable;
+				};
+
 				pinctrl_flx0_default: flx0_default {
 					pinmux = <PIN_PB28__FLEXCOM0_IO0>,
 						 <PIN_PB29__FLEXCOM0_IO1>;
-- 
2.5.0