linux-kernel - [PATCH v1 2/2] arm64: dts: freescale: imx8mp-verdin: don't limit i2c2 max. clock

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Message-ID: <20240527160359.1965512-3-max.oss.09@gmail.com>
Date: Mon, 27 May 2024 18:03:46 +0200
From: max.oss.09@...il.com
To: Max Krummenacher <max.krummenacher@...adex.com>
Cc: Conor Dooley <conor+dt@...nel.org>,
	Fabio Estevam <festevam@...il.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Rob Herring <robh@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Shawn Guo <shawnguo@...nel.org>,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1 2/2] arm64: dts: freescale: imx8mp-verdin: don't limit i2c2 max. clock

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

Verdin I2C2 may be used to access other I2C devices apart from serving
as an HDMI DDC channel.
Thus do not limit the used I2C clock frequency to 10kHz in the module
specific device tree part.
If an overlay configures i2c2 as DDC the overlay is also responsible
to cope with an appropriate I2C clock.

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

---

 arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
index aef4bef4bccd..3c6b47edd4c1 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
@@ -650,8 +650,7 @@ eeprom@50 {
 
 /* Verdin I2C_2_DSI */
 &i2c2 {
-	/* Lower frequency to avoid DDC/EDID issues with certain displays/screens. */
-	clock-frequency = <10000>;
+	clock-frequency = <400000>;
 	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c2>;
 	pinctrl-1 = <&pinctrl_i2c2_gpio>;
-- 
2.42.0