diff options
| author | Bai Ping <ping.bai@nxp.com> | 2018-04-17 14:00:14 +0800 |
|---|---|---|
| committer | Jason Liu <jason.hui.liu@nxp.com> | 2019-02-12 10:31:16 +0800 |
| commit | 5a80b116468e024ac4f2a2112dbbbae71460bf7c (patch) | |
| tree | fc51b863df65b9ddefc670da2b1e982b1cbc5741 /arch/arm/boot/dts/imx7ulp-evk.dts | |
| parent | 58c984c2e4f1b8d9640c98bade896e35f84aac09 (diff) | |
MLK-18042-02 arm: dts: update the backlight brightness on imx7ulp evk
On the i.MX7ULP EVK Rev.B baord, the backlight brigntness driver circuit
is updated. A RC filter is added on the MP3301's EN pin. So the PWM's frequency
should be change to 20KHZ. for EN pin, A DC voltage from 0.7V to 1.4V can control
the LED current from 0% to 100%. the backlight brightness level also need to be
updated.
Signed-off-by: Bai Ping <ping.bai@nxp.com>
Reviewed-by: Anson Huang <Anson.Huang@nxp.com>
Diffstat (limited to 'arch/arm/boot/dts/imx7ulp-evk.dts')
| -rw-r--r-- | arch/arm/boot/dts/imx7ulp-evk.dts | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm/boot/dts/imx7ulp-evk.dts b/arch/arm/boot/dts/imx7ulp-evk.dts index 90b0d767bfd7..3c08414bb07b 100644 --- a/arch/arm/boot/dts/imx7ulp-evk.dts +++ b/arch/arm/boot/dts/imx7ulp-evk.dts @@ -1,6 +1,6 @@ /* * Copyright 2016 Freescale Semiconductor, Inc. - * Copyright 2017 NXP. + * Copyright 2017-2018 NXP. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -32,8 +32,8 @@ backlight { compatible = "pwm-backlight"; - pwms = <&pwm0 1 5000000>; - brightness-levels = <0 4 8 16 32 64 128 255>; + pwms = <&pwm0 1 50000>; + brightness-levels = <0 20 25 30 35 40 100>; default-brightness-level = <6>; status = "okay"; }; |