board: gateworks: venice: poll I2C lines to wait for GSC firmware
In some situations the GSC firmware where the EEPROM containing the
model and DRAM configuration may not be ready by the time the SoC
is ready to talk to it over I2C.
Instead of a hard delay, poll the I2C lines to wait until they are
released to avoid the I2C drivers 'Arbitation lost' error message.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
diff --git a/arch/arm/dts/imx8mn-venice.dts b/arch/arm/dts/imx8mn-venice.dts
index eeae225..9e31b37 100644
--- a/arch/arm/dts/imx8mn-venice.dts
+++ b/arch/arm/dts/imx8mn-venice.dts
@@ -23,8 +23,11 @@
&i2c1 {
clock-frequency = <100000>;
- pinctrl-names = "default";
+ pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_i2c1>;
+ pinctrl-1 = <&pinctrl_i2c1_gpio>;
+ scl-gpios = <&gpio5 14 GPIO_ACTIVE_HIGH>;
+ sda-gpios = <&gpio5 15 GPIO_ACTIVE_HIGH>;
status = "okay";
gsc: gsc@20 {
@@ -89,6 +92,13 @@
>;
};
+ pinctrl_i2c1_gpio: i2c1grp-gpio-grp {
+ fsl,pins = <
+ MX8MN_IOMUXC_I2C1_SCL_GPIO5_IO14 0x400001c3
+ MX8MN_IOMUXC_I2C1_SDA_GPIO5_IO15 0x400001c3
+ >;
+ };
+
pinctrl_i2c2: i2c2grp {
fsl,pins = <
MX8MN_IOMUXC_I2C2_SCL_I2C2_SCL 0x400001c3