SDA and SCL is configured as GPIO for I2C bus to recover during
I2C bus malfunction.
Signed-off-by: Durai Manickam KR <durai.manickamkr@xxxxxxxxxxxxx>
---
arch/arm/boot/dts/at91-sama5d2_icp.dts | 22 ++++++++++++++++++++--
1 file changed, 20 insertions(+), 2 deletions(-)
diff --git a/arch/arm/boot/dts/at91-sama5d2_icp.dts b/arch/arm/boot/dts/at91-sama5d2_icp.dts
index e06b58724ca8..806eb1d911d7 100644
--- a/arch/arm/boot/dts/at91-sama5d2_icp.dts
+++ b/arch/arm/boot/dts/at91-sama5d2_icp.dts
@@ -307,8 +307,11 @@ regulator-state-mem {
};
&i2c0 { /* mikrobus i2c */
- pinctrl-names = "default";
+ pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_mikrobus_i2c>;
+ pinctrl-1 = <&pinctrl_i2c0_gpio>;
+ sda-gpios = <&pioA PIN_PD21 GPIO_ACTIVE_HIGH>;
+ scl-gpios = <&pioA PIN_PD22 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
i2c-digital-filter;
i2c-digital-filter-width-ns = <35>;
status = "okay";
@@ -316,8 +319,11 @@ &i2c0 { /* mikrobus i2c */
&i2c1 {
dmas = <0>, <0>;
- pinctrl-names = "default";
+ pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_i2c1_default>;
+ pinctrl-1 = <&pinctrl_i2c1_gpio>;
+ sda-gpios = <&pioA PIN_PD19 GPIO_ACTIVE_HIGH>;
+ scl-gpios = <&pioA PIN_PD20 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
i2c-digital-filter;
i2c-digital-filter-width-ns = <35>;
status = "okay";
@@ -402,6 +408,12 @@ pinctrl_i2c1_default: i2c1_default {
bias-disable;
};
+ pinctrl_i2c1_gpio: i2c1_gpio {
+ pinmux = <PIN_PD19__GPIO>,
+ <PIN_PD20__GPIO>;
+ bias-disable;
+ };
+
pinctrl_key_gpio_default: key_gpio_default {
pinmux = <PIN_PD0__GPIO>;
bias-pull-up;
@@ -463,6 +475,12 @@ pinctrl_mikrobus_i2c: mikrobus_i2c {
bias-disable;
};
+ pinctrl_i2c0_gpio: i2c0_gpio {
+ pinmux = <PIN_PD21__GPIO>,
+ <PIN_PD22__GPIO>;
+ bias-disable;
+ };
+
pinctrl_mikrobus1_an: mikrobus1_an {
pinmux = <PIN_PD26__GPIO>;
bias-disable;
--
2.25.1
