Add nodes for the backlight / pwm found on a23-gt90h-v4 tablets.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
arch/arm/boot/dts/sun8i-a23-gt90h-v4.dts | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/arch/arm/boot/dts/sun8i-a23-gt90h-v4.dts b/arch/arm/boot/dts/sun8i-a23-gt90h-v4.dts
index 6a22ee3..1be8d5f 100644
--- a/arch/arm/boot/dts/sun8i-a23-gt90h-v4.dts
+++ b/arch/arm/boot/dts/sun8i-a23-gt90h-v4.dts
@@ -47,6 +47,7 @@
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>
#include <dt-bindings/pinctrl/sun4i-a10.h>
+#include <dt-bindings/pwm/pwm.h>
/ {
model = "Allwinner GT90H Quad Core Tablet (v4)";
@@ -56,6 +57,16 @@
serial0 = &r_uart;
};
+ backlight: backlight {
+ compatible = "pwm-backlight";
+ pinctrl-names = "default";
+ pinctrl-0 = <&bl_en_pin_gt90h>;
+ pwms = <&pwm 0 50000 PWM_POLARITY_INVERTED>;
+ brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
+ default-brightness-level = <8>;
+ enable-gpios = <&pio 7 6 GPIO_ACTIVE_HIGH>; /* PH6 */
+ };
+
chosen {
stdout-path = "serial0:115200n8";
};
@@ -115,6 +126,13 @@
};
&pio {
+ bl_en_pin_gt90h: bl_en_pin@0 {
+ allwinner,pins = "PH6";
+ allwinner,function = "gpio_in";
+ allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+ allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+ };
+
mmc0_cd_pin_gt90h: mmc0_cd_pin@0 {
allwinner,pins = "PB4";
allwinner,function = "gpio_in";
@@ -123,6 +141,12 @@
};
};
+&pwm {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pwm0_pins>;
+ status = "okay";
+};
+
&r_rsb {
status = "okay";
--
2.7.2
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