From: Chris Morgan <macromorgan@xxxxxxxxxxx>
Add support for the ADC joysticks found on the Anbernic RG35XX-H. The
joysticks use one channel of the GPADC which is muxed 4 ways by an ADC
mux.
Signed-off-by: Chris Morgan <macromorgan@xxxxxxxxxxx>
---
.../sun50i-h700-anbernic-rg35xx-h.dts | 79 +++++++++++++++++++
1 file changed, 79 insertions(+)
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-h.dts b/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-h.dts
index 63036256917f..ff453336eab1 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-h.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h700-anbernic-rg35xx-h.dts
@@ -9,6 +9,78 @@
/ {
model = "Anbernic RG35XX H";
compatible = "anbernic,rg35xx-h", "allwinner,sun50i-h700";
+
+ adc-joystick {
+ compatible = "adc-joystick";
+ io-channels = <&adc_mux 0>,
+ <&adc_mux 1>,
+ <&adc_mux 2>,
+ <&adc_mux 3>;
+ pinctrl-0 = <&joy_mux_pin>;
+ pinctrl-names = "default";
+ poll-interval = <60>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ axis@0 {
+ reg = <0>;
+ abs-flat = <32>;
+ abs-fuzz = <32>;
+ abs-range = <4096 0>;
+ linux,code = <ABS_X>;
+ };
+
+ axis@1 {
+ reg = <1>;
+ abs-flat = <32>;
+ abs-fuzz = <32>;
+ abs-range = <0 4096>;
+ linux,code = <ABS_Y>;
+ };
+
+ axis@2 {
+ reg = <2>;
+ abs-flat = <32>;
+ abs-fuzz = <32>;
+ abs-range = <0 4096>;
+ linux,code = <ABS_RX>;
+ };
+
+ axis@3 {
+ reg = <3>;
+ abs-flat = <32>;
+ abs-fuzz = <32>;
+ abs-range = <4096 0>;
+ linux,code = <ABS_RY>;
+ };
+ };
+
+ adc_mux: adc-mux {
+ compatible = "io-channel-mux";
+ channels = "left_x", "left_y", "right_x", "right_y";
+ #io-channel-cells = <1>;
+ io-channels = <&gpadc 0>;
+ io-channel-names = "parent";
+ mux-controls = <&gpio_mux>;
+ settle-time-us = <100>;
+ };
+
+ gpio_mux: mux-controller {
+ compatible = "gpio-mux";
+ mux-gpios = <&pio 8 1 GPIO_ACTIVE_LOW>,
+ <&pio 8 2 GPIO_ACTIVE_LOW>;
+ #mux-control-cells = <0>;
+ };
+};
+
+&gpadc {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "okay";
+
+ channel@0 {
+ reg = <0>;
+ };
};
&gpio_keys_gamepad {
@@ -34,3 +106,10 @@ &ehci1 {
&ohci1 {
status = "okay";
};
+
+&pio {
+ joy_mux_pin: joy-mux-pin {
+ pins = "PI0";
+ function = "gpio_out";
+ };
+};
--
2.34.1
