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Platform: Rockchip
OS: Android 6.0 Kernel: 3.10.92 使用rk3288的i2c5读写时,会出现以下error log: root@rk3288:/ # cat /sys/bus/i2c/drivers/at24/5-0050/eeprom [ 24.297924] rockchip_i2c ff170000.i2c: Addr[0x0050] wait event timeout, state: 1, is_busy: 1, error: 0, complete_what: 0x0, ipd: 0x0 [ 24.302052] rockchip_i2c ff170000.i2c: I2C_CON: start bit is set [ 24.514383] rockchip_i2c ff170000.i2c: Addr[0x0050] wait event timeout, state: 2, is_busy: 1, error: 0, complete_what: 0x2, ipd: 0x20 解决方法: [kris@:~/rk3288/kernel]$ g df arch/arm/boot/dts/rk3288-pinctrl.dtsi diff --git a/arch/arm/boot/dts/rk3288-pinctrl.dtsi b/arch/arm/boot/dts/rk3288-pinctrl.dtsi index a35d4d7..4a4ebc8 100755 --- a/arch/arm/boot/dts/rk3288-pinctrl.dtsi +++ b/arch/arm/boot/dts/rk3288-pinctrl.dtsi @@ -404,21 +404,21 @@ gpio7_i2c5 { i2c5_sda:i2c5-sda { - rockchip,pins = + rockchip,pins = rockchip,pull = rockchip,drive = //rockchip,tristate = }; i2c5_scl:i2c5-scl { - rockchip,pins = + rockchip,pins = rockchip,pull = rockchip,drive = //rockchip,tristate = }; i2c5_gpio: i2c5-gpio { - rockchip,pins = + rockchip,pins = rockchip,drive = }; }; 很奇怪I2C的配置居然也有两种,datasheet也没具体说明这两种i2c复用功能的区别。 |
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