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| author | Philip Avinash <avinashphilip@ti.com> | 2013-06-06 15:52:39 +0200 |
|---|---|---|
| committer | Benoit Cousson <benoit.cousson@linaro.org> | 2013-06-19 01:53:47 +0200 |
| commit | 1632fbdee713de3213b24eda9de062c0ef865634 (patch) | |
| tree | 903ec9fbd0c774a199ffedcc5cd8958b7caaa4f9 /arch | |
| parent | ARM: dts: AM33XX: Add PWM backlight DT data to am335x-evm (diff) | |
| download | linux-1632fbdee713de3213b24eda9de062c0ef865634.tar.xz linux-1632fbdee713de3213b24eda9de062c0ef865634.zip | |
ARM: dts: AM33XX: Add PWM backlight DT data to am335x-evmsk
PWM output from ecap2 uses as backlight source. Also adds low threshold
value to have a uniform divisions in brightness-levels scales with
inverse polarity.
Signed-off-by: Philip Avinash <avinashphilip@ti.com>
Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Benoit Cousson <benoit.cousson@linaro.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/boot/dts/am335x-evmsk.dts | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/am335x-evmsk.dts b/arch/arm/boot/dts/am335x-evmsk.dts index 338b68188349..2033a37c86ec 100644 --- a/arch/arm/boot/dts/am335x-evmsk.dts +++ b/arch/arm/boot/dts/am335x-evmsk.dts @@ -71,6 +71,12 @@ 0x1b4 (PIN_OUTPUT_PULLDOWN | MUX_MODE3) /* xdma_event_intr1.clkout2 */ >; }; + + ecap2_pins: backlight_pins { + pinctrl-single,pins = < + 0x19c 0x4 /* mcasp0_ahclkr.ecap2_in_pwm2_out MODE4 */ + >; + }; }; ocp { @@ -120,6 +126,16 @@ st,max-limit-z = <750>; }; }; + + epwmss2: epwmss@48304000 { + status = "okay"; + + ecap2: ecap@48304100 { + status = "okay"; + pinctrl-names = "default"; + pinctrl-0 = <&ecap2_pins>; + }; + }; }; vbat: fixedregulator@0 { @@ -199,6 +215,13 @@ gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>; }; }; + + backlight { + compatible = "pwm-backlight"; + pwms = <&ecap2 0 50000 1>; + brightness-levels = <0 58 61 66 75 90 125 170 255>; + default-brightness-level = <8>; + }; }; #include "tps65910.dtsi" |