ARM: dts: sun4i: Add backlight node to pov protab2 ips9 tablet

Add a node describing the lcd panel backlight on the pov protab2 ips9
tablet.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --git a/arch/arm/boot/dts/sun4i-a10-pov-protab2-ips9.dts b/arch/arm/boot/dts/sun4i-a10-pov-protab2-ips9.dts
index 82e69c3..d1ea36c 100644 (file)
--- a/arch/arm/boot/dts/sun4i-a10-pov-protab2-ips9.dts
+++ b/arch/arm/boot/dts/sun4i-a10-pov-protab2-ips9.dts
@@ -47,6 +47,7 @@
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/pinctrl/sun4i-a10.h>
+#include <dt-bindings/pwm/pwm.h>
 
 / {
        model = "Point of View Protab2-IPS9";
@@ -56,6 +57,16 @@
                serial0 = &uart0;
        };
 
+       backlight: backlight {
+               compatible = "pwm-backlight";
+               pinctrl-names = "default";
+               pinctrl-0 = <&bl_en_pin_protab>;
+               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 7 GPIO_ACTIVE_HIGH>; /* PH7 */
+       };
+
        chosen {
                stdout-path = "serial0:115200n8";
        };
@@ -129,6 +140,13 @@
 };
 
 &pio {
+       bl_en_pin_protab: bl_en_pin@0 {
+               allwinner,pins = "PH7";
+               allwinner,function = "gpio_out";
+               allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+               allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+       };
+
        usb0_id_detect_pin: usb0_id_detect_pin@0 {
                allwinner,pins = "PH4";
                allwinner,function = "gpio_in";
@@ -144,6 +162,12 @@
        };
 };
 
+&pwm {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pwm0_pins_a>;
+       status = "okay";
+};
+
 &reg_dcdc2 {
        regulator-always-on;
        regulator-min-microvolt = <1000000>;