diff options
| author | Leonard Crestez <leonard.crestez@nxp.com> | 2018-06-20 13:41:16 +0300 |
|---|---|---|
| committer | Shawn Guo <shawnguo@kernel.org> | 2018-07-01 05:54:54 +0300 |
| commit | 4a23e6ee9f691cfbd6bfc99c2c5aa8d23d8c1662 (patch) | |
| tree | 4ecbc634b1c69d722d42fc2906c4e5422d2be6ac /arch | |
| parent | eecd78bc7805964527acdaba5f2b91d7b317aeea (diff) | |
| download | linux-4a23e6ee9f691cfbd6bfc99c2c5aa8d23d8c1662.tar.xz | |
ARM: dts: imx7d-sdb: Restore pwm backlight support
This was removed in commit 5eaeaccdaedb ("ARM: dts: imx7d-sdb: Pass
'enable-gpios' and 'power-supply' properties") with a note claiming that
GPIO1_IO01 is connected to a pin labeled as "PWREN" on the connector.
Despite that label this pin does actually work as a PWM controlling
brightness. So restore pwm functionality.
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/boot/dts/imx7d-sdb.dts | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/arch/arm/boot/dts/imx7d-sdb.dts b/arch/arm/boot/dts/imx7d-sdb.dts index 9f9e6a1e3b72..8d137acb9f07 100644 --- a/arch/arm/boot/dts/imx7d-sdb.dts +++ b/arch/arm/boot/dts/imx7d-sdb.dts @@ -108,10 +108,17 @@ gpio = <&gpio2 14 GPIO_ACTIVE_LOW>; }; + backlight: backlight { + compatible = "pwm-backlight"; + pwms = <&pwm1 0 5000000 0>; + brightness-levels = <0 4 8 16 32 64 128 255>; + default-brightness-level = <6>; + status = "okay"; + }; + panel { compatible = "innolux,at043tn24"; - pinctrl-0 = <&pinctrl_backlight>; - enable-gpios = <&gpio1 1 GPIO_ACTIVE_HIGH>; + backlight = <&backlight>; power-supply = <®_lcd_3v3>; port { @@ -704,6 +711,12 @@ }; }; +&pwm1 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_pwm1>; + status = "okay"; +}; + &iomuxc_lpsr { pinctrl_wdog: wdoggrp { fsl,pins = < @@ -711,9 +724,9 @@ >; }; - pinctrl_backlight: backlightgrp { + pinctrl_pwm1: pwm1grp { fsl,pins = < - MX7D_PAD_LPSR_GPIO1_IO01__GPIO1_IO1 0x110b0 + MX7D_PAD_LPSR_GPIO1_IO01__PWM1_OUT 0x30 >; }; }; |