Add pwm backlight support for gp evm.
Signed-off-by: Sourav Poddar <sourav.poddar@xxxxxx>
---
arch/arm/boot/dts/am437x-gp-evm.dts | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/arch/arm/boot/dts/am437x-gp-evm.dts b/arch/arm/boot/dts/am437x-gp-evm.dts
index 11d93ba..2e79bda 100644
--- a/arch/arm/boot/dts/am437x-gp-evm.dts
+++ b/arch/arm/boot/dts/am437x-gp-evm.dts
@@ -12,10 +12,18 @@
#include "am4372.dtsi"
#include <dt-bindings/pinctrl/am43xx.h>
+#include <dt-bindings/pwm/pwm.h>
/ {
model = "TI AM437x GP EVM";
compatible = "ti,am437x-gp-evm","ti,am4372","ti,am43";
+
+ backlight {
+ compatible = "pwm-backlight";
+ pwms = <&ecap0 0 50000 PWM_POLARITY_INVERTED>;
+ brightness-levels = <0 51 53 56 62 75 101 152 255>;
+ default-brightness-level = <8>;
+ };
};
&am43xx_pinmux {
@@ -32,6 +40,12 @@
0x158 (PIN_INPUT_PULLUP | SLEWCTRL_FAST | MUX_MODE2) /* spi0_d1.i2c1_sda */
>;
};
+
+ ecap0_pins: backlight_pins {
+ pinctrl-single,pins = <
+ 0x164 MUX_MODE0 /* eCAP0_in_PWM0_out.eCAP0_in_PWM0_out MODE0 */
+ >;
+ };
};
&i2c0 {
@@ -45,3 +59,13 @@
pinctrl-names = "default";
pinctrl-0 = <&i2c1_pins>;
};
+
+&epwmss0 {
+ status = "okay";
+};
+
+&ecap0 {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&ecap0_pins>;
+};
--
1.7.9.5
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