diff options
| author | Tony Lindgren <tony@atomide.com> | 2020-02-19 11:25:27 -0800 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2020-02-20 06:51:13 -0800 |
| commit | 10dc62d0ae4167770e9ab150fc1ab55baa82e010 (patch) | |
| tree | af9a9b986155375a8c4bba408400eac89d418603 | |
| parent | ae232e45acf9621f2c96b41ca3af006ac7552c33 (diff) | |
| download | linux-omap-omap-for-v5.6/droid4-lcd-fix.tar.gz | |
ARM: dts: droid4: Configure LED backlight for lm3532omap-for-v5.6/droid4-lcd-fix-signedomap-for-v5.6/droid4-lcd-fix
With the LED backlight changes merged, we still need the dts configured
to have backlight working for droid4. Based on an earlier patch from
Pavel Machek <pavel@ucw.cz>, let's configure the backlight but update
the value range to be more usable.
We have a range of 256 register values split into 8 steps, so we can
generate the brightness levels backwards with:
$ for i in 0 1 2 3 4 5 6 7; do echo "255 - ${i} * (256 / 8)" | bc; done
To avoid more confusion why the LCD backlight is still not on, let's
also enable LED backlight as a loadable module for omap2plus_defconfig.
Cc: Merlijn Wajer <merlijn@wizzup.org>
Cc: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Tony Lindgren <tony@atomide.com>
| -rw-r--r-- | arch/arm/boot/dts/motorola-mapphone-common.dtsi | 13 | ||||
| -rw-r--r-- | arch/arm/configs/omap2plus_defconfig | 1 |
2 files changed, 12 insertions, 2 deletions
diff --git a/arch/arm/boot/dts/motorola-mapphone-common.dtsi b/arch/arm/boot/dts/motorola-mapphone-common.dtsi index 85665506f4f801..b6e82b165f5c5a 100644 --- a/arch/arm/boot/dts/motorola-mapphone-common.dtsi +++ b/arch/arm/boot/dts/motorola-mapphone-common.dtsi @@ -182,6 +182,14 @@ pwm-names = "enable", "direction"; direction-duty-cycle-ns = <10000000>; }; + + backlight: backlight { + compatible = "led-backlight"; + + leds = <&backlight_led>; + brightness-levels = <31 63 95 127 159 191 223 255>; + default-brightness-level = <6>; + }; }; &dss { @@ -205,6 +213,8 @@ vddi-supply = <&lcd_regulator>; reset-gpios = <&gpio4 5 GPIO_ACTIVE_HIGH>; /* gpio101 */ + backlight = <&backlight>; + width-mm = <50>; height-mm = <89>; @@ -393,12 +403,11 @@ ramp-up-us = <1024>; ramp-down-us = <8193>; - led@0 { + backlight_led: led@0 { reg = <0>; led-sources = <2>; ti,led-mode = <0>; label = ":backlight"; - linux,default-trigger = "backlight"; }; led@1 { diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig index c32c338f770426..847f9874ccc4ad 100644 --- a/arch/arm/configs/omap2plus_defconfig +++ b/arch/arm/configs/omap2plus_defconfig @@ -375,6 +375,7 @@ CONFIG_BACKLIGHT_GENERIC=m CONFIG_BACKLIGHT_PWM=m CONFIG_BACKLIGHT_PANDORA=m CONFIG_BACKLIGHT_GPIO=m +CONFIG_BACKLIGHT_LED=m CONFIG_FRAMEBUFFER_CONSOLE=y CONFIG_FRAMEBUFFER_CONSOLE_ROTATION=y CONFIG_LOGO=y |