The imx-i2c driver supports automatic bus recovery via the GPIO
function of the I2C pins. Enable this functionality for the Ka-Ro
electronics TX53 modules.
Signed-off-by: Lothar Waßmann <LW@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/boot/dts/imx53-tx53-x13x.dts | 5 ++++-
arch/arm/boot/dts/imx53-tx53.dtsi | 19 ++++++++++++++++++-
2 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/arch/arm/boot/dts/imx53-tx53-x13x.dts b/arch/arm/boot/dts/imx53-tx53-x13x.dts
index e21bc91..a87a10b 100644
--- a/arch/arm/boot/dts/imx53-tx53-x13x.dts
+++ b/arch/arm/boot/dts/imx53-tx53-x13x.dts
@@ -121,8 +121,11 @@
};
&i2c3 {
- pinctrl-names = "default";
+ pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_i2c3>;
+ pinctrl-1 = <&pinctrl_i2c3_gpio>;
+ scl-gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;
+ sda-gpios = <&gpio3 28 GPIO_ACTIVE_HIGH>;
status = "okay";
sgtl5000: codec@0a {
diff --git a/arch/arm/boot/dts/imx53-tx53.dtsi b/arch/arm/boot/dts/imx53-tx53.dtsi
index 33934e5..8e10c47 100644
--- a/arch/arm/boot/dts/imx53-tx53.dtsi
+++ b/arch/arm/boot/dts/imx53-tx53.dtsi
@@ -233,8 +233,11 @@
};
&i2c1 {
- pinctrl-names = "default";
+ pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_i2c1>;
+ pinctrl-0 = <&pinctrl_i2c1_gpio>;
+ scl-gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;
+ sda-gpios = <&gpio3 28 GPIO_ACTIVE_HIGH>;
clock-frequency = <400000>;
status = "okay";
@@ -394,6 +397,13 @@
>;
};
+ pinctrl_i2c1_gpio: i2c1-gpiogrp {
+ fsl,pins = <
+ MX53_PAD_EIM_D21__GPIO3_21 0x400001e6
+ MX53_PAD_EIM_D28__GPIO3_28 0x400001e6
+ >;
+ };
+
pinctrl_i2c3: i2c3grp {
fsl,pins = <
MX53_PAD_GPIO_3__I2C3_SCL 0x400001e4
@@ -401,6 +411,13 @@
>;
};
+ pinctrl_i2c3_gpio: i2c3-gpiogrp {
+ fsl,pins = <
+ MX53_PAD_GPIO_3__GPIO1_3 0x400001e6
+ MX53_PAD_GPIO_6__GPIO1_6 0x400001e6
+ >;
+ };
+
pinctrl_nand: nandgrp {
fsl,pins = <
MX53_PAD_NANDF_WE_B__EMI_NANDF_WE_B 0x4
--
2.1.4
--
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