[PATCH 1/6] arm64: dts: imx8mq-librem5: Enable I2C recovery
From: Sebastian Krzyszkowiak via B4 Relay <devnull+sebastian.krzyszkowiak.puri.sm@kernel.org>
Date: 2026-01-05 20:40:03
Also in:
b4-sent, imx, linux-devicetree, lkml
Subsystem:
arm/freescale imx / mxc arm architecture, the rest · Maintainers:
Frank Li, Sascha Hauer, Linus Torvalds
From: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm> i2c-imx can perform bus recovery by temporarily switching I2C pins into GPIO mode. To do so, it needs GPIO and pinctrl handles to be provided in the device tree. Suggested-by: Denis Sergeevich <redacted> Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm> --- arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi | 48 +++++++++++++++++++++-- 1 file changed, 44 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi b/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi
index 9e0e2d7271ef..ce039bd701c2 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi@@ -512,6 +512,13 @@ MX8MQ_IOMUXC_I2C1_SDA_I2C1_SDA 0x40000026 >; }; + pinctrl_i2c1_gpio: i2c1-gpiogrp { + fsl,pins = < + MX8MQ_IOMUXC_I2C1_SCL_GPIO5_IO14 0x26 + MX8MQ_IOMUXC_I2C1_SDA_GPIO5_IO15 0x26 + >; + }; + pinctrl_i2c2: i2c2grp { fsl,pins = < MX8MQ_IOMUXC_I2C2_SCL_I2C2_SCL 0x40000026
@@ -519,6 +526,13 @@ MX8MQ_IOMUXC_I2C2_SDA_I2C2_SDA 0x40000026 >; }; + pinctrl_i2c2_gpio: i2c2-gpiogrp { + fsl,pins = < + MX8MQ_IOMUXC_I2C2_SCL_GPIO5_IO16 0x26 + MX8MQ_IOMUXC_I2C2_SDA_GPIO5_IO17 0x26 + >; + }; + pinctrl_i2c3: i2c3grp { fsl,pins = < MX8MQ_IOMUXC_I2C3_SCL_I2C3_SCL 0x40000026
@@ -526,6 +540,13 @@ MX8MQ_IOMUXC_I2C3_SDA_I2C3_SDA 0x40000026 >; }; + pinctrl_i2c3_gpio: i2c3-gpiogrp { + fsl,pins = < + MX8MQ_IOMUXC_I2C3_SCL_GPIO5_IO18 0x26 + MX8MQ_IOMUXC_I2C3_SDA_GPIO5_IO19 0x26 + >; + }; + pinctrl_i2c4: i2c4grp { fsl,pins = < MX8MQ_IOMUXC_I2C4_SCL_I2C4_SCL 0x40000026
@@ -533,6 +554,13 @@ MX8MQ_IOMUXC_I2C4_SDA_I2C4_SDA 0x40000026 >; }; + pinctrl_i2c4_gpio: i2c4-gpiogrp { + fsl,pins = < + MX8MQ_IOMUXC_I2C4_SCL_GPIO5_IO20 0x26 + MX8MQ_IOMUXC_I2C4_SDA_GPIO5_IO21 0x26 + >; + }; + pinctrl_keys: keysgrp { fsl,pins = < /* VOL- */
@@ -782,8 +810,11 @@ MX8MQ_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B 0x1f &i2c1 { clock-frequency = <384000>; - 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"; typec_pd: usb-pd@3f {
@@ -982,8 +1013,11 @@ rtc@68 { &i2c2 { clock-frequency = <384000>; - 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)>; status = "okay"; magnetometer: magnetometer@1e {
@@ -1031,8 +1065,11 @@ accel_gyro: accel-gyro@6a { &i2c3 { clock-frequency = <384000>; - 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"; codec: audio-codec@1a {
@@ -1121,8 +1158,11 @@ touchscreen@38 { &i2c4 { clock-frequency = <384000>; - 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"; vcm@c {
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2.52.0