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-sama5d27_som1.dtsi | 12 ++++++++++-
arch/arm/boot/dts/at91-sama5d27_som1_ek.dts | 23 +++++++++++++++++++--
2 files changed, 32 insertions(+), 3 deletions(-)
diff --git a/arch/arm/boot/dts/at91-sama5d27_som1.dtsi b/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
index e3251f3e3eaa..edce6bcf6cd6 100644
--- a/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
+++ b/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
@@ -8,6 +8,7 @@
*/
#include "sama5d2.dtsi"
#include "sama5d2-pinfunc.h"
+#include <dt-bindings/gpio/gpio.h>
/ {
model = "Atmel SAMA5D27 SoM1";
@@ -95,8 +96,11 @@ ethernet-phy@7 {
i2c0: i2c@f8028000 {
dmas = <0>, <0>;
- pinctrl-names = "default";
+ pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_i2c0_default>;
+ pinctrl-1 = <&pinctrl_i2c0_gpio>;
+ sda-gpios = <&pioA PIN_PD21 GPIO_ACTIVE_HIGH>;
+ scl-gpios = <&pioA PIN_PD22 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
status = "okay";
at24@50 {
@@ -113,6 +117,12 @@ pinctrl_i2c0_default: i2c0_default {
bias-disable;
};
+ pinctrl_i2c0_gpio: i2c0_gpio {
+ pinmux = <PIN_PD21__GPIO>,
+ <PIN_PD22__GPIO>;
+ bias-disable;
+ };
+
pinctrl_qspi1_default: qspi1_default {
sck_cs {
pinmux = <PIN_PB5__QSPI1_SCK>,
diff --git a/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts b/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts
index 614999dcb990..0f10e05d6e23 100644
--- a/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts
+++ b/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts
@@ -131,8 +131,11 @@ i2c3: i2c@600 {
i2c-analog-filter;
i2c-digital-filter;
i2c-digital-filter-width-ns = <35>;
- pinctrl-names = "default";
+ pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_mikrobus_i2c>;
+ pinctrl-1 = <&pinctrl_i2c3_gpio>;
+ sda-gpios = <&pioA PIN_PA24 GPIO_ACTIVE_HIGH>;
+ scl-gpios = <&pioA PIN_PA23 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
status = "okay";
};
};
@@ -216,8 +219,11 @@ i2c1: i2c@fc028000 {
i2c-analog-filter;
i2c-digital-filter;
i2c-digital-filter-width-ns = <35>;
- pinctrl-names = "default";
+ pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_i2c1_default>;
+ pinctrl-1 = <&pinctrl_i2c1_gpio>;
+ sda-gpios = <&pioA PIN_PD4 GPIO_ACTIVE_HIGH>;
+ scl-gpios = <&pioA PIN_PD5 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
status = "okay";
};
@@ -253,6 +259,13 @@ pinctrl_i2c1_default: i2c1_default {
bias-disable;
};
+ pinctrl_i2c1_gpio: i2c1_gpio {
+ pinmux = <PIN_PD4__GPIO>,
+ <PIN_PD5__GPIO>;
+ bias-disable;
+ };
+
+
pinctrl_isc_base: isc_base {
pinmux = <PIN_PC21__ISC_PCK>,
<PIN_PC22__ISC_VSYNC>,
@@ -442,6 +455,12 @@ pinctrl_mikrobus_i2c: mikrobus1_i2c {
bias-disable;
};
+ pinctrl_i2c3_gpio: i2c3_gpio {
+ pinmux = <PIN_PA24__GPIO>,
+ <PIN_PA23__GPIO>;
+ bias-disable;
+ };
+
pinctrl_flx4_default: flx4_uart_default {
pinmux = <PIN_PC28__FLEXCOM4_IO0>,
<PIN_PC29__FLEXCOM4_IO1>,
--
2.25.1
