ARM: dts: am43x-epos-evm: Add pwm backlight support.

Add pwm backlight support for am43x epos evm.

Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Signed-off-by: Benoit Cousson <bcousson@baylibre.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/am43x-epos-evm.dts b/arch/arm/boot/dts/am43x-epos-evm.dts
index fbf9c4c7a94f..0899c5fa8824 100644
--- a/arch/arm/boot/dts/am43x-epos-evm.dts
+++ b/arch/arm/boot/dts/am43x-epos-evm.dts
@@ -13,6 +13,7 @@
 #include "am4372.dtsi"
 #include <dt-bindings/pinctrl/am43xx.h>
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/pwm/pwm.h>
 
 / {
         model = "TI AM43x EPOS EVM";
@@ -79,6 +80,12 @@
                                 0x18c (PIN_INPUT_PULLUP | SLEWCTRL_FAST | MUX_MODE0)    /* i2c0_scl.i2c0_scl */
                         >;
                 };
+
+                ecap0_pins: backlight_pins {
+                        pinctrl-single,pins = <
+                                0x164 MUX_MODE0         /* eCAP0_in_PWM0_out.eCAP0_in_PWM0_out MODE0 */
+                        >;
+                };
         };
 
         matrix_keypad: matrix_keypad@0 {
@@ -113,6 +120,13 @@
                                 0x0203006c      /* DOWN */
                                 0x03030069>;    /* LEFT */
                 };
+
+        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>;
+        };
 };
 
 &mmc1 {
@@ -184,3 +198,13 @@
 &gpio3 {
         status = "okay";
 };
+
+&epwmss0 {
+        status = "okay";
+};
+
+&ecap0 {
+                status = "okay";
+                pinctrl-names = "default";
+                pinctrl-0 = <&ecap0_pins>;
+};