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@xxxxxxxxx>
---
arch/arm/boot/dts/logicpd-torpedo-37xx-devkit.dts | 26 +++++++++++++++++------
1 file changed, 20 insertions(+), 6 deletions(-)
diff --git a/arch/arm/boot/dts/logicpd-torpedo-37xx-devkit.dts b/arch/arm/boot/dts/logicpd-torpedo-37xx-devkit.dts
index 4b00b58..1a97dda 100644
--- 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 {
@@ -166,13 +175,13 @@
};
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 */
};
};
@@ -194,6 +203,12 @@
>;
};
+ 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 */
@@ -220,7 +235,6 @@
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 */
>;
};
--
1.9.1
--
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