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arm64: dts: freescale: imx93-phy{core,board}: Add i2c bus recovery

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Add bus recovery feature for I2C buses on the PHYTEC phyCORE-i.MX93 SoM
based boards (that is phyBOARD-Nash-i.MX93 and phyBOARD-Segin-i.MX93).
This enables the i2c-imx-lpi2c driver to recover the stuck I2C bus by
switching the SCL and SDA pinmuxing and do the I2C bus bit-banging.

Signed-off-by: Primoz Fiser <primoz.fiser@norik.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
This commit is contained in:
Primoz Fiser 2025-10-23 12:34:26 +02:00 committed by Frank Li
parent 2d763a22a6
commit 89320a1b9b
3 changed files with 33 additions and 3 deletions
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12
arch/arm64/boot/dts/freescale/imx93-phyboard-nash.dts
View File

@ -144,8 +144,11 @@ &flexcan1 {
/* I2C2 */
&lpi2c2 {
clock-frequency = <400000>;
pinctrl-names = "default";
pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_lpi2c2>;
pinctrl-1 = <&pinctrl_lpi2c2_gpio>;
scl-gpios = <&gpio1 2 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
sda-gpios = <&gpio1 3 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
status = "okay";
/* RTC */
@ -277,6 +280,13 @@ MX93_PAD_I2C2_SDA__LPI2C2_SDA 0x40000b9e
>;
};
pinctrl_lpi2c2_gpio: lpi2c2gpiogrp {
fsl,pins = <
MX93_PAD_I2C2_SCL__GPIO1_IO02 0x31e
MX93_PAD_I2C2_SDA__GPIO1_IO03 0x31e
>;
};
pinctrl_lpspi6: lpspi6grp {
fsl,pins = <
MX93_PAD_GPIO_IO00__GPIO2_IO00 0x386

12
arch/arm64/boot/dts/freescale/imx93-phyboard-segin.dts
View File

@ -148,8 +148,11 @@ &flexcan1 {
/* I2C2 */
&lpi2c2 {
clock-frequency = <400000>;
pinctrl-names = "default";
pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_lpi2c2>;
pinctrl-1 = <&pinctrl_lpi2c2_gpio>;
scl-gpios = <&gpio1 2 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
sda-gpios = <&gpio1 3 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
status = "okay";
/* Codec */
@ -262,6 +265,13 @@ MX93_PAD_I2C2_SDA__LPI2C2_SDA 0x40000b9e
>;
};
pinctrl_lpi2c2_gpio: lpi2c2gpiogrp {
fsl,pins = <
MX93_PAD_I2C2_SCL__GPIO1_IO02 0x31e
MX93_PAD_I2C2_SDA__GPIO1_IO03 0x31e
>;
};
pinctrl_reg_usdhc2_vmmc: regusdhc2vmmcgrp {
fsl,pins = <
MX93_PAD_SD2_RESET_B__GPIO3_IO07 0x31e

12
arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi
View File

@ -93,8 +93,11 @@ ethphy1: ethernet-phy@1 {
/* I2C3 */
&lpi2c3 {
clock-frequency = <400000>;
pinctrl-names = "default";
pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_lpi2c3>;
pinctrl-1 = <&pinctrl_lpi2c3_gpio>;
scl-gpios = <&gpio2 29 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
sda-gpios = <&gpio2 28 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
status = "okay";
pmic@25 {
@ -234,6 +237,13 @@ MX93_PAD_GPIO_IO29__LPI2C3_SCL 0x40000b9e
>;
};
pinctrl_lpi2c3_gpio: lpi2c3gpiogrp {
fsl,pins = <
MX93_PAD_GPIO_IO28__GPIO2_IO28 0x31e
MX93_PAD_GPIO_IO29__GPIO2_IO29 0x31e
>;
};
pinctrl_pmic: pmicgrp {
fsl,pins = <
MX93_PAD_ENET2_RD3__GPIO4_IO27 0x31e