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标题: 最新sdk rk3288_linux_release_20210304 I2C复用问题 [打印本页]

作者: xuhao 时间: 2022-4-14 16:57
标题: 最新sdk rk3288_linux_release_20210304 I2C复用问题
参考https://wiki.t-firefly.com/zh_CN/AIO-3288C/driver_gpio.html
代码与说明不匹配，
自己修改后，GPIO只能是拉高，无法清零
修改 kernel/arch/arm/boot/dts/rk3288.dts 如下
506    i2c4: i2c@ff160000 {
507       compatible = "rockchip,rk3288-i2c";
508       reg = <0x0 0xff160000 0x0 0x1000>;
509       interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
510       #address-cells = <1>;
511       #size-cells = <0>;
512       clock-names = "i2c";
513       clocks = <&cru PCLK_I2C4>;
514       pinctrl-names = "default", "gpio";
515       pinctrl-0 = <&i2c4_xfer>;
516       pinctrl-1 = <&i2c4_gpio>;
517       status = "disabled";
518    };

2177       i2c4 {
2178          i2c4_xfer: i2c4-xfer {
2179                rockchip,pins = <7 17 RK_FUNC_1 &pcfg_pull_none>,
2180                      <7 18 RK_FUNC_1 &pcfg_pull_none>;
2181          };
2182          i2c4_gpio: i2c4-gpio {
2183                rockchip,pins = <7 17 RK_FUNC_GPIO &pcfg_pull_none>,
2184                      <7 18 RK_FUNC_GPIO &pcfg_pull_none>;
2185          };
2186
2187       };

作者: xuhao 时间: 2022-4-15 08:39
已解决，自身原因。

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