ARM: dts: sun7i: Add backlight node to Wexler TAB7200 tablet

Add a backlight for controlling the lcd panel backlight on Wexler TAB7200 tablet

Signed-off-by: Aleksei Mamlin <mamlinav@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --git a/arch/arm/boot/dts/sun7i-a20-wexler-tab7200.dts b/arch/arm/boot/dts/sun7i-a20-wexler-tab7200.dts
index 1dc9079..f47e5f1 100644 (file)
--- a/arch/arm/boot/dts/sun7i-a20-wexler-tab7200.dts
+++ b/arch/arm/boot/dts/sun7i-a20-wexler-tab7200.dts
@@ -48,6 +48,7 @@
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/pwm/pwm.h>
 
 / {
        model = "Wexler TAB7200";
@@ -57,6 +58,16 @@
                serial0 = &uart0;
        };
 
+       backlight {
+               compatible = "pwm-backlight";
+               pwms = <&pwm 0 50000 PWM_POLARITY_INVERTED>;
+               brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
+               default-brightness-level = <8>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&bl_enable_pin>;
+               enable-gpios = <&pio 7 7 GPIO_ACTIVE_HIGH>; /* PH7 */
+       };
+
        chosen {
                stdout-path = "serial0:115200n8";
        };
@@ -158,6 +169,13 @@
 };
 
 &pio {
+       bl_enable_pin: bl_enable_pin@0 {
+               allwinner,pins = "PH7";
+               allwinner,function = "gpio_out";
+               allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+               allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+       };
+
        ts_reset_pin: ts_reset_pin@0 {
                allwinner,pins = "PB13";
                allwinner,function = "gpio_out";