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修改设备树中的以下内容,就为i.MX6的i2c1增加了i2c恢复功能。
diff --git a/arch/arm/boot/dts/imx6qdl-phytec-mira.dtsi b/arch/arm/boot/dts/imx6qdl-phytec-mira.dtsi index 2e4dae8..79f3152 100644 --- a/arch/arm/boot/dts/imx6qdl-phytec-mira.dtsi +++ b/arch/arm/boot/dts/imx6qdl-phytec-mira.dtsi @@ -200,8 +200,11 @@ }; &i2c1 { - pinctrl-names = "default"; + pinctrl-names = "default","gpio"; pinctrl-0 = <&pinctrl_i2c1>; + pinctrl-1 = <&pinctrl_i2c1_gpio>; + scl-gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>; + sda-gpios = <&gpio3 28 GPIO_ACTIVE_HIGH>; clock-frequency = <100000>; status = "disabled"; @@ -604,6 +607,13 @@ >; }; + pinctrl_i2c1_gpio: i2c1gpiogrp { + fsl,pins = < + MX6QDL_PAD_EIM_D21__GPIO3_IO21 0x4001b8b1 + MX6QDL_PAD_EIM_D28__GPIO3_IO28 0x4001b8b1 + >; + }; + pinctrl_pcie: pciegrp { fsl,pins = < MX6QDL_PAD_EIM_OE__GPIO2_IO25 0xb0b1
需要注意的是不同的i2c接口需要单独配置io口。
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