linux-kernel - [PATCH v2 4/6] arm64: dts: imx8mp-skov: describe I2C bus recovery for all controllers

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Message-Id: <20250218-skov-imx8mp-new-boards-v2-4-4040379742ea@pengutronix.de>
Date: Tue, 18 Feb 2025 19:38:16 +0100
From: Ahmad Fatoum <a.fatoum@...gutronix.de>
To: Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Fabio Estevam <festevam@...il.com>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 Ahmad Fatoum <a.fatoum@...gutronix.de>
Subject: [PATCH v2 4/6] arm64: dts: imx8mp-skov: describe I2C bus recovery
 for all controllers

I2C bus recovery can be used to recover when SCL/SDA are stuck low.
To be able to use it, add the necessary GPIO and pinctrl entries.

Signed-off-by: Ahmad Fatoum <a.fatoum@...gutronix.de>
---
 .../arm64/boot/dts/freescale/imx8mp-skov-reva.dtsi | 48 ++++++++++++++++++++--
 1 file changed, 44 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-skov-reva.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-skov-reva.dtsi
index b1dfd8eb7062ae5e736146458833a11c4d37eb7b..63742d88c3c69276f19c508779a3dbd572ed2c42 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-skov-reva.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp-skov-reva.dtsi
@@ -240,8 +240,11 @@ &flexcan2 {
 
 &i2c1 {
 	clock-frequency = <100000>;
-	pinctrl-names = "default";
+	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c1>;
+	pinctrl-1 = <&pinctrl_i2c1_gpio>;
+	scl-gpios = <&gpio5 14 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	sda-gpios = <&gpio5 15 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 	status = "okay";
 
 	pmic@25 {
@@ -332,14 +335,20 @@ reg_nvcc_sd2: LDO5 {
 };
 
 &i2c2 {
-	pinctrl-names = "default";
+	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c2>;
+	pinctrl-1 = <&pinctrl_i2c2_gpio>;
+	scl-gpios = <&gpio5 16 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	sda-gpios = <&gpio5 17 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 };
 
 &i2c3 {
 	clock-frequency = <400000>;
-	pinctrl-names = "default";
+	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c3>;
+	pinctrl-1 = <&pinctrl_i2c3_gpio>;
+	scl-gpios = <&gpio5 18 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	sda-gpios = <&gpio5 19 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 	status = "okay";
 
 	i2c_rtc: rtc@51 {
@@ -354,8 +363,11 @@ i2c_rtc: rtc@51 {
 
 &i2c4 {
 	clock-frequency = <380000>;
-	pinctrl-names = "default";
+	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c4>;
+	pinctrl-1 = <&pinctrl_i2c4_gpio>;
+	scl-gpios = <&gpio5 20 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	sda-gpios = <&gpio5 21 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 	status = "okay";
 
 	switch: switch@5f {
@@ -567,6 +579,13 @@ MX8MP_IOMUXC_I2C1_SDA__I2C1_SDA				0x400001c2
 		>;
 	};
 
+	pinctrl_i2c1_gpio: i2c1gpiogrp {
+		fsl,pins = <
+			MX8MP_IOMUXC_I2C1_SCL__GPIO5_IO14			0x400001c2
+			MX8MP_IOMUXC_I2C1_SDA__GPIO5_IO15			0x400001c2
+		>;
+	};
+
 	pinctrl_i2c2: i2c2grp {
 		fsl,pins = <
 			MX8MP_IOMUXC_I2C2_SCL__I2C2_SCL				0x400001c2
@@ -574,6 +593,13 @@ MX8MP_IOMUXC_I2C2_SDA__I2C2_SDA				0x400001c2
 		>;
 	};
 
+	pinctrl_i2c2_gpio: i2c2gpiogrp {
+		fsl,pins = <
+			MX8MP_IOMUXC_I2C2_SCL__GPIO5_IO16			0x400001c2
+			MX8MP_IOMUXC_I2C2_SDA__GPIO5_IO17			0x400001c2
+		>;
+	};
+
 	pinctrl_i2c3: i2c3grp {
 		fsl,pins = <
 			MX8MP_IOMUXC_I2C3_SCL__I2C3_SCL				0x400001c2
@@ -581,6 +607,13 @@ MX8MP_IOMUXC_I2C3_SDA__I2C3_SDA				0x400001c2
 		>;
 	};
 
+	pinctrl_i2c3_gpio: i2c3gpiogrp {
+		fsl,pins = <
+			MX8MP_IOMUXC_I2C3_SCL__GPIO5_IO18			0x400001c2
+			MX8MP_IOMUXC_I2C3_SDA__GPIO5_IO19			0x400001c2
+		>;
+	};
+
 	pinctrl_i2c4: i2c4grp {
 		fsl,pins = <
 			MX8MP_IOMUXC_I2C4_SCL__I2C4_SCL				0x400001c3
@@ -588,6 +621,13 @@ MX8MP_IOMUXC_I2C4_SDA__I2C4_SDA				0x400001c3
 		>;
 	};
 
+	pinctrl_i2c4_gpio: i2c4gpiogrp {
+		fsl,pins = <
+			MX8MP_IOMUXC_I2C4_SCL__GPIO5_IO20			0x400001c3
+			MX8MP_IOMUXC_I2C4_SDA__GPIO5_IO21			0x400001c3
+		>;
+	};
+
 	pinctrl_pmic: pmicirqgrp {
 		fsl,pins = <
 			MX8MP_IOMUXC_GPIO1_IO03__GPIO1_IO03			0x41

-- 
2.39.5