ARM: dts: at91: sama5d2_xplained: enable ADTRG pin

Enable pinctrl for ADTRG pin (PD31) for ADC hardware trigger support.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>

diff --git a/arch/arm/boot/dts/at91-sama5d2_xplained.dts b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
index c7e9ccf2bc8724304f44c574bc901b3e9b3999af..cbc26001247bea2fabcf186ad784f187810dbc63 100644 (file)
--- a/arch/arm/boot/dts/at91-sama5d2_xplained.dts
+++ b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
@@ -309,7 +309,7 @@
                                vddana-supply = <&vdd_3v3_lp_reg>;
                                vref-supply = <&vdd_3v3_lp_reg>;
                                pinctrl-names = "default";
-                               pinctrl-0 = <&pinctrl_adc_default>;
+                               pinctrl-0 = <&pinctrl_adc_default &pinctrl_adtrg_default>;
                                status = "okay";
                        };
 
@@ -340,6 +340,20 @@
                                        bias-disable;
                                };
 
+                               /*
+                                * The ADTRG pin can work on any edge type.
+                                * In here it's being pulled up, so need to
+                                * connect it to ground to get an edge e.g.
+                                * Trigger can be configured on falling, rise
+                                * or any edge, and the pull-up can be changed
+                                * to pull-down or left floating according to
+                                * needs.
+                                */
+                               pinctrl_adtrg_default: adtrg_default {
+                                       pinmux = <PIN_PD31__ADTRG>;
+                                       bias-pull-up;
+                               };
+
                                pinctrl_charger_chglev: charger_chglev {
                                        pinmux = <PIN_PA12__GPIO>;
                                        bias-disable;