diff options
| author | Neil Armstrong <narmstrong@baylibre.com> | 2017-01-16 11:22:45 +0100 |
|---|---|---|
| committer | Kevin Hilman <khilman@baylibre.com> | 2017-01-30 10:47:59 -0800 |
| commit | 6b6a1867667a90f399762dc1ee6add5b4aa646c9 (patch) | |
| tree | 088a6caf6429f57b4ae760e5e021d39022dc3bae /arch | |
| parent | bd80ef5ed46233d90f216805ff40aba326ff1bdd (diff) | |
| download | linux-6b6a1867667a90f399762dc1ee6add5b4aa646c9.tar.bz2 | |
ARM64: dts: meson-gxbb-p200: add ADC laddered keys
Add the 5 buttons connected to a resistor laddered matrix and sampled
by the SAR ADC channel 0.
Only the p200 board has these buttons, the P201 doesn't.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/boot/dts/amlogic/meson-gxbb-p200.dts | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-p200.dts b/arch/arm64/boot/dts/amlogic/meson-gxbb-p200.dts index 03e3d76626dd..fc0e86cb4cde 100644 --- a/arch/arm64/boot/dts/amlogic/meson-gxbb-p200.dts +++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-p200.dts @@ -45,10 +45,55 @@ /dts-v1/; #include "meson-gxbb-p20x.dtsi" +#include <dt-bindings/input/input.h> / { compatible = "amlogic,p200", "amlogic,meson-gxbb"; model = "Amlogic Meson GXBB P200 Development Board"; + + avdd18_usb_adc: regulator-avdd18_usb_adc { + compatible = "regulator-fixed"; + regulator-name = "AVDD18_USB_ADC"; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; + }; + + adc_keys { + compatible = "adc-keys"; + io-channels = <&saradc 0>; + io-channel-names = "buttons"; + keyup-threshold-microvolt = <1800000>; + + button-home { + label = "Home"; + linux,code = <KEY_HOME>; + press-threshold-microvolt = <900000>; /* 50% */ + }; + + button-esc { + label = "Esc"; + linux,code = <KEY_ESC>; + press-threshold-microvolt = <684000>; /* 38% */ + }; + + button-up { + label = "Volume Up"; + linux,code = <KEY_VOLUMEUP>; + press-threshold-microvolt = <468000>; /* 26% */ + }; + + button-down { + label = "Volume Down"; + linux,code = <KEY_VOLUMEDOWN>; + press-threshold-microvolt = <252000>; /* 14% */ + }; + + button-menu { + label = "Menu"; + linux,code = <KEY_MENU>; + press-threshold-microvolt = <0>; /* 0% */ + }; + }; }; &i2c_B { @@ -56,3 +101,8 @@ pinctrl-0 = <&i2c_b_pins>; pinctrl-names = "default"; }; + +&saradc { + status = "okay"; + vref-supply = <&avdd18_usb_adc>; +}; |