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@xxxxxx>
Reviewed-by: Thierry Reding <thierry.reding@xxxxxxxxxxxxxxxxx>
---
Changes since v4:
- Replaced usage of tab with space in compatible field
Changes since v3:
- Add epwmss parent status="okay" field.
arch/arm/boot/dts/am335x-evm.dts | 23 +++++++++++++++++++++++
1 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/arch/arm/boot/dts/am335x-evm.dts b/arch/arm/boot/dts/am335x-evm.dts
index 9f65f17..73a035b 100644
--- a/arch/arm/boot/dts/am335x-evm.dts
+++ b/arch/arm/boot/dts/am335x-evm.dts
@@ -44,6 +44,12 @@
0x154 0x27 /* spi0_d0.gpio0_3, INPUT | MODE7 */
>;
};
+
+ ecap0_pins: backlight_pins {
+ pinctrl-single,pins = <
+ 0x164 0x0 /* eCAP0_in_PWM0_out.eCAP0_in_PWM0_out MODE0 */
+ >;
+ };
};
ocp {
@@ -102,6 +108,16 @@
reg = <0x48>;
};
};
+
+ epwmss0: epwmss@48300000 {
+ status = "okay";
+
+ ecap0: ecap@48300100 {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&ecap0_pins>;
+ };
+ };
};
vbat: fixedregulator@0 {
@@ -158,6 +174,13 @@
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"
--
1.7.0.4
--
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