linux-kernel - [PATCH] ARM: dts: imx6: phytec: Add gpio pinctrl for i2c bus recovery

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Message-Id: <20211004064822.97170-1-y.bas@phytec.de>
Date:   Mon, 4 Oct 2021 08:48:22 +0200
From:   Yunus Bas <y.bas@...tec.de>
To:     robh+dt@...nel.org, shawnguo@...nel.org, festevam@...il.com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     s.hauer@...gutronix.de, kernel@...gutronix.de,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] ARM: dts: imx6: phytec: Add gpio pinctrl for i2c bus recovery

Make use of the i2c bus recovery feature and enable it on PHYTEC
phyCORE-based modules and boards.

Signed-off-by: Yunus Bas <y.bas@...tec.de>
---
 arch/arm/boot/dts/imx6qdl-phytec-mira.dtsi    | 30 +++++++++++++++----
 .../boot/dts/imx6qdl-phytec-phycore-som.dtsi  | 12 +++++++-
 .../boot/dts/imx6ul-phytec-phycore-som.dtsi   | 12 +++++++-
 3 files changed, 47 insertions(+), 7 deletions(-)

diff --git a/arch/arm/boot/dts/imx6qdl-phytec-mira.dtsi b/arch/arm/boot/dts/imx6qdl-phytec-mira.dtsi
index 0873f53ea275..120d6e997a4c 100644
--- a/arch/arm/boot/dts/imx6qdl-phytec-mira.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-phytec-mira.dtsi
@@ -145,8 +145,11 @@ &hdmi {
 };
 
 &i2c1 {
-	pinctrl-names = "default";
+	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c1>;
+	pinctrl-1 = <&pinctrl_i2c1_gpio>;
+	scl-gpios = <&gpio3 21 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	sda-gpios = <&gpio3 28 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 	clock-frequency = <400000>;
 	status = "disabled";
 
@@ -185,8 +188,11 @@ i2c_rtc: rtc@68 {
 };
 
 &i2c2 {
-	pinctrl-names = "default";
+	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c2>;
+	pinctrl-1 = <&pinctrl_i2c2_gpio>;
+	scl-gpios = <&gpio4 12 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	sda-gpios = <&gpio4 13 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 	clock-frequency = <100000>;
 	status = "disabled";
 };
@@ -300,6 +306,20 @@ MX6QDL_PAD_KEY_ROW2__HDMI_TX_CEC_LINE	0x1f8b0
 		>;
 	};
 
+	pinctrl_i2c1: i2c1grp {
+		fsl,pins = <
+			MX6QDL_PAD_EIM_D21__I2C1_SCL		0x4001b8b1
+			MX6QDL_PAD_EIM_D28__I2C1_SDA		0x4001b8b1
+		>;
+	};
+
+	pinctrl_i2c1_gpio: i2c1gpiogrp {
+		fsl,pins = <
+			MX6QDL_PAD_EIM_D21__GPIO3_IO21		0x4001b8b1
+			MX6QDL_PAD_EIM_D28__GPIO3_IO28		0x4001b8b1
+		>;
+	};
+
 	pinctrl_i2c2: i2c2grp {
 		fsl,pins = <
 			MX6QDL_PAD_KEY_ROW3__I2C2_SDA		0x4001b8b1
@@ -307,10 +327,10 @@ MX6QDL_PAD_KEY_COL3__I2C2_SCL		0x4001b8b1
 		>;
 	};
 
-	pinctrl_i2c1: i2c1grp {
+	pinctrl_i2c2_gpio: i2c2gpiogrp {
 		fsl,pins = <
-			MX6QDL_PAD_EIM_D21__I2C1_SCL		0x4001b8b1
-			MX6QDL_PAD_EIM_D28__I2C1_SDA		0x4001b8b1
+			MX6QDL_PAD_KEY_ROW3__GPIO4_IO13		0x4001b8b1
+			MX6QDL_PAD_KEY_COL3__GPIO4_IO12		0x4001b8b1
 		>;
 	};
 
diff --git a/arch/arm/boot/dts/imx6qdl-phytec-phycore-som.dtsi b/arch/arm/boot/dts/imx6qdl-phytec-phycore-som.dtsi
index a80aa08a37cb..94b254bfd054 100644
--- a/arch/arm/boot/dts/imx6qdl-phytec-phycore-som.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-phytec-phycore-som.dtsi
@@ -78,8 +78,11 @@ &gpmi {
 };
 
 &i2c3 {
-	pinctrl-names = "default";
+	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c3>;
+	pinctrl-1 = <&pinctrl_i2c3_gpio>;
+	scl-gpios = <&gpio1 5 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	sda-gpios = <&gpio1 6 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 	clock-frequency = <400000>;
 	status = "okay";
 
@@ -259,6 +262,13 @@ MX6QDL_PAD_GPIO_5__I2C3_SCL		0x4001b8b1
 		>;
 	};
 
+	pinctrl_i2c3_gpio: i2c3gpiogrp {
+		fsl,pins = <
+			MX6QDL_PAD_GPIO_6__GPIO1_IO06	0x4001b8b1
+			MX6QDL_PAD_GPIO_5__GPIO1_IO05	0x4001b8b1
+		>;
+	};
+
 	pinctrl_ecspi1: ecspi1grp {
 		fsl,pins = <
 			MX6QDL_PAD_EIM_D16__ECSPI1_SCLK		0x100b1
diff --git a/arch/arm/boot/dts/imx6ul-phytec-phycore-som.dtsi b/arch/arm/boot/dts/imx6ul-phytec-phycore-som.dtsi
index 19a062635ff6..3cddc68917a0 100644
--- a/arch/arm/boot/dts/imx6ul-phytec-phycore-som.dtsi
+++ b/arch/arm/boot/dts/imx6ul-phytec-phycore-som.dtsi
@@ -68,8 +68,11 @@ &gpmi {
 };
 
 &i2c1 {
-	pinctrl-names = "default";
+	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c1>;
+	pinctrl-1 = <&pinctrl_i2c1_gpio>;
+	scl-gpios = <&gpio1 28 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	sda-gpios = <&gpio1 29 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 	clock-frequency = <100000>;
 	status = "okay";
 
@@ -147,6 +150,13 @@ MX6UL_PAD_UART4_RX_DATA__I2C1_SDA	0x4001b8b0
 		>;
 	};
 
+	pinctrl_i2c1_gpio: i2cgpiogrp {
+		fsl,pins = <
+			MX6UL_PAD_UART4_TX_DATA__GPIO1_IO28	0x4001b8b0
+			MX6UL_PAD_UART4_RX_DATA__GPIO1_IO29	0x4001b8b0
+		>;
+	};
+
 	pinctrl_uart1: uart1grp {
 		fsl,pins = <
 			MX6UL_PAD_UART1_TX_DATA__UART1_DCE_TX	0x1b0b1
-- 
2.33.0