linux-kernel - [PATCH v1 16/17] ARM: dts: imx6q-apalis: backlight pwm: Adapt brightness steps

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Date:   Mon, 16 May 2022 13:58:44 +0200
From:   Max Krummenacher <max.oss.09@...il.com>
To:     max.krummenacher@...adex.com
Cc:     Fabio Estevam <festevam@...il.com>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 16/17] ARM: dts: imx6q-apalis: backlight pwm: Adapt brightness steps

From: Max Krummenacher <max.krummenacher@...adex.com>

Adapt the brightness steps as the backlight doesn't light up
for very low duty cycles.

Signed-off-by: Max Krummenacher <max.krummenacher@...adex.com>
---

 arch/arm/boot/dts/imx6qdl-apalis.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/imx6qdl-apalis.dtsi b/arch/arm/boot/dts/imx6qdl-apalis.dtsi
index 49669caac8b7..62d9d907432c 100644
--- a/arch/arm/boot/dts/imx6qdl-apalis.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-apalis.dtsi
@@ -20,8 +20,8 @@
 
 	backlight: backlight {
 		compatible = "pwm-backlight";
-		brightness-levels = <0 4 8 16 32 64 128 255>;
-		default-brightness-level = <6>;
+		brightness-levels = <0 45 63 88 119 158 203 255>;
+		default-brightness-level = <4>;
 		enable-gpios = <&gpio3 13 GPIO_ACTIVE_HIGH>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_gpio_bl_on>;
-- 
2.20.1