ARM: dts: imx53-tx53: add support for I2C bus recovery

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@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/boot/dts/imx53-tx53-x13x.dts b/arch/arm/boot/dts/imx53-tx53-x13x.dts
index e21bc91b8dcea7f9961bd1ee8c174bb599fd0b2b..a87a10b942cfcecad071024db86f2fdd8b2d89a1 100644 (file)
--- 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 33934e53d5186da73d357d39d354f53e9373f135..8e10c4757770d30d49b61222c53151b65d1f0c66 100644 (file)
--- 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