【MA35D1】默认NAU8822的IIC接口用GPIO-base的驱动，如何换成硬件IIC的驱动

1万 · 2023-3-3 13:31

修改dts配置文件，以som 256的camera为例，查看实际硬件连接的是i2C3：

&i2c_gpio0 {

      status = "disabled";

      hm1055@24 {

            compatible = "himax,hm1055";

            reg = <0x24>;

            pinctrl-names = "default";

            pinctrl-0 = <&pinctrl_ccap0>;

            clocks = <&clk CCAP0_GATE>;

            clock-names = "xclk";

            reset-gpios = <&gpiom 1 GPIO_ACTIVE_LOW>; /* PM1 */

            powerdown-gpios = <&gpiok 8 GPIO_ACTIVE_HIGH>; /* PK8 */

            port {

                     hm1055_0: endpoint {

                              remote-endpoint = <&ccap0_1>;

                     };

            };

      };

};

修改为：

&i2c3 {

      status = "okay";

      pinctrl-names = "default";

      pinctrl-0 = <&pinctrl_i2c3>;

      hm1055@24 {

            compatible = "himax,hm1055";

            reg = <0x24>;

            pinctrl-names = "default";

            pinctrl-0 = <&pinctrl_ccap0>;

            clocks = <&clk CCAP0_GATE>;

            clock-names = "xclk";

            reset-gpios = <&gpiom 1 GPIO_ACTIVE_LOW>; /* PM1 */

            powerdown-gpios = <&gpiok 8 GPIO_ACTIVE_HIGH>; /* PK8 */

            port {

                     hm1055_0: endpoint {

                              remote-endpoint = <&ccap0_1>;

                     };

            };

      };

};

然后增加i2c3相关配置：

   i2c3 {

            pinctrl_i2c3: i2c3grp{

                     nuvoton,pins =

                              <SYS_GPM_MFPH_PM14MFP_I2C3_SDA &pcfg_default>,

                              <SYS_GPM_MFPH_PM15MFP_I2C3_SCL &pcfg_default>;

            };

      };