linux-kernel - [PATCH 3/3] arm64: dts: rockchip: shift boost frequency for rk3566-pinenote backlight

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Message-Id: <20230602-lm3630a_boost_frequency-v1-3-076472036d1a@mweigand.net>
Date:   Wed, 14 Jun 2023 21:08:54 +0200
From:   Maximilian Weigand <mweigand2017@...il.com>
To:     Lee Jones <lee@...nel.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Helge Deller <deller@....de>, Pavel Machek <pavel@....cz>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>
Cc:     dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-leds@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org,
        Maximilian Weigand <mweigand@...igand.net>
Subject: [PATCH 3/3] arm64: dts: rockchip: shift boost frequency for
 rk3566-pinenote backlight

From: Maximilian Weigand <mweigand@...igand.net>

The PineNote exhibits visible flickering of its backlight for certain
brightness settings. Alleviate this by enabling a frequency shift from
500 kHz to 560 kHz for the boost converter of the led driver.

Signed-off-by: Maximilian Weigand <mweigand@...igand.net>
---
 arch/arm64/boot/dts/rockchip/rk3566-pinenote.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3566-pinenote.dtsi b/arch/arm64/boot/dts/rockchip/rk3566-pinenote.dtsi
index 8d61f824c12d..4e4b3bbaa157 100644
--- a/arch/arm64/boot/dts/rockchip/rk3566-pinenote.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3566-pinenote.dtsi
@@ -453,6 +453,7 @@ led-controller@36 {
 		pinctrl-names = "default";
 		#address-cells = <1>;
 		#size-cells = <0>;
+		ti,boost_frequency_shift;
 
 		led@0 {
 			reg = <0>;

-- 
2.39.2