The MK808 has a button inside the cover for the boot loader to do
some action. Add the adc-keys node to the rk3066a-mk808.dts file.
The rk3066 has a higher maximum DC supply voltage for the analog part of
SAR-ADC VDDA_SARADC of 2.75V then other Rockchip SoCs.
For the "rockchip,saradc" node is a vref-supply property required,
so add a regulator for it as well.
Signed-off-by: Johan Jonker <jbx6244@xxxxxxxxx>
---
arch/arm/boot/dts/rk3066a-mk808.dts | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/arch/arm/boot/dts/rk3066a-mk808.dts b/arch/arm/boot/dts/rk3066a-mk808.dts
index 9790bc63b..667d57a4f 100644
--- a/arch/arm/boot/dts/rk3066a-mk808.dts
+++ b/arch/arm/boot/dts/rk3066a-mk808.dts
@@ -4,6 +4,7 @@
*/
/dts-v1/;
+#include <dt-bindings/input/input.h>
#include "rk3066a.dtsi"
/ {
@@ -24,6 +25,20 @@
device_type = "memory";
};
+ adc-keys {
+ compatible = "adc-keys";
+ io-channels = <&saradc 1>;
+ io-channel-names = "buttons";
+ keyup-threshold-microvolt = <2500000>;
+ poll-interval = <100>;
+
+ recovery {
+ label = "recovery";
+ linux,code = <KEY_VENDOR>;
+ press-threshold-microvolt = <0>;
+ };
+ };
+
gpio-leds {
compatible = "gpio-leds";
@@ -46,6 +61,13 @@
};
};
+ vcc_2v5: vcc-2v5 {
+ compatible = "regulator-fixed";
+ regulator-name = "vcc_2v5";
+ regulator-min-microvolt = <2500000>;
+ regulator-max-microvolt = <2500000>;
+ };
+
vcc_io: vcc-io {
compatible = "regulator-fixed";
regulator-name = "vcc_io";
@@ -164,6 +186,11 @@
};
};
+&saradc {
+ vref-supply = <&vcc_2v5>;
+ status = "okay";
+};
+
&uart2 {
status = "okay";
};
--
2.20.1
