ARM: dts: AM33XX: Add PWM backlight DT data to am335x-evm
PWM output from ecap0 uses as backlight source. Also adds low threshold
value to have a uniform divisions in brightness-levels scales.
Signed-off-by: Philip Avinash <avinashphilip@ti.com>
Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Benoit Cousson <benoit.cousson@linaro.org>
diff --git a/arch/arm/boot/dts/am335x-evm.dts b/arch/arm/boot/dts/am335x-evm.dts
index 2c53247..a150d04 100644
--- a/arch/arm/boot/dts/am335x-evm.dts
+++ b/arch/arm/boot/dts/am335x-evm.dts
@@ -91,6 +91,12 @@
0x9c (PIN_OUTPUT | MUX_MODE0) /* gpmc_be0n_cle.gpmc_be0n_cle */
>;
};
+
+ ecap0_pins: backlight_pins {
+ pinctrl-single,pins = <
+ 0x164 0x0 /* eCAP0_in_PWM0_out.eCAP0_in_PWM0_out MODE0 */
+ >;
+ };
};
ocp {
@@ -163,6 +169,16 @@
status = "okay";
};
+ epwmss0: epwmss@48300000 {
+ status = "okay";
+
+ ecap0: ecap@48300100 {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&ecap0_pins>;
+ };
+ };
+
gpmc: gpmc@50000000 {
status = "okay";
pinctrl-names = "default";
@@ -299,6 +315,13 @@
gpio-key,wakeup;
};
};
+
+ backlight {
+ compatible = "pwm-backlight";
+ pwms = <&ecap0 0 50000 0>;
+ brightness-levels = <0 51 53 56 62 75 101 152 255>;
+ default-brightness-level = <8>;
+ };
};
#include "tps65910.dtsi"