ARM: dts: omap3logic: Add PWM-Backlight

The backlight pin is shared with Timer 10 PWM.  This patch allows the
pwm_bl driver to enable the pwm run by this timer to dim the backlight.

Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/boot/dts/logicpd-torpedo-37xx-devkit.dts b/arch/arm/boot/dts/logicpd-torpedo-37xx-devkit.dts
index 874ce46..6cbcce2 100644 (file)
--- a/arch/arm/boot/dts/logicpd-torpedo-37xx-devkit.dts
+++ b/arch/arm/boot/dts/logicpd-torpedo-37xx-devkit.dts
@@ -71,6 +71,15 @@
                        linux,default-trigger = "none";
                };
        };
+
+       pwm10: dmtimer-pwm@10 {
+               compatible = "ti,omap-dmtimer-pwm";
+               pinctrl-names = "default";
+               pinctrl-0 = <&pwm_pins>;
+               ti,timers = <&timer10>;
+               #pwm-cells = <3>;
+       };
+
 };
 
 &vaux1 {
@@ -168,13 +177,13 @@
        };
 
        bl: backlight {
-               compatible = "gpio-backlight";
+               compatible = "pwm-backlight";
                pinctrl-names = "default";
                pinctrl-0 = <&backlight_pins>;
-
-               gpios = <&gpio5 26 GPIO_ACTIVE_HIGH>, /* gpio_154 */
-                       <&gpio2 24 GPIO_ACTIVE_HIGH>; /* gpio_56 */
-               default-on;
+               pwms = <&pwm10 0 5000000 0>;
+               brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
+               default-brightness-level = <7>;
+               enable-gpios = <&gpio5 26 GPIO_ACTIVE_HIGH>; /* gpio_154 */
        };
 };
 
@@ -196,6 +205,12 @@
                >;
        };
 
+       pwm_pins: pinmux_pwm_pins {
+               pinctrl-single,pins = <
+                       OMAP3_CORE1_IOPAD(0x20B8, PIN_OUTPUT | PIN_OFF_OUTPUT_LOW | MUX_MODE3)       /* gpmc_ncs5.gpt_10_pwm_evt */
+               >;
+       };
+
        led_pins: pinmux_led_pins {
                pinctrl-single,pins = <
                        OMAP3_CORE1_IOPAD(0x21d8, PIN_OUTPUT | MUX_MODE4)       /* gpio_179 */
@@ -222,7 +237,6 @@
 
        backlight_pins: pinmux_backlight_pins {
                pinctrl-single,pins = <
-                       OMAP3_CORE1_IOPAD(0x20B8, PIN_OUTPUT | PIN_OFF_OUTPUT_LOW | MUX_MODE4)       /* gpmc_ncs5.gpio_56 */
                        OMAP3_CORE1_IOPAD(0x2188, PIN_OUTPUT | PIN_OFF_OUTPUT_LOW | MUX_MODE4)       /* mcbsp4_dx.gpio_154 */
                >;
        };