ARM: dts: sun5i: Add backlight node to UTOO P66 tablet

Add a node describing the lcd panel backlight on the UTOO P66 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/sun5i-a13-utoo-p66.dts b/arch/arm/boot/dts/sun5i-a13-utoo-p66.dts
index eb793d5..5236c1e 100644 (file)
--- a/arch/arm/boot/dts/sun5i-a13-utoo-p66.dts
+++ b/arch/arm/boot/dts/sun5i-a13-utoo-p66.dts
@@ -47,11 +47,21 @@
 #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 = "Utoo P66";
        compatible = "utoo,p66", "allwinner,sun5i-a13";
 
+       backlight: backlight {
+               compatible = "pwm-backlight";
+               pwms = <&pwm 0 50000 PWM_POLARITY_INVERTED>;
+               /* Note levels of 10 / 20% result in backlight off */
+               brightness-levels = <0 30 40 50 60 70 80 90 100>;
+               default-brightness-level = <6>;
+               /* TODO: backlight uses axp gpio1 as enable pin */
+       };
+
        i2c_lcd: i2c@0 {
                /* The lcd panel i2c interface is hooked up via gpios */
                compatible = "i2c-gpio";
@@ -201,6 +211,12 @@
        };
 };
 
+&pwm {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pwm0_pins>;
+       status = "okay";
+};
+
 &reg_dcdc2 {
        regulator-always-on;
        regulator-min-microvolt = <1000000>;