Firefly-rk3288 I2C 驱动

junhai · 发表于 2016-3-28 22:36:51

请问：I2C4的GPIO要用做普通GPIO的话，删除设备树中的配置就可以了吗？

junhai · 发表于 2016-3-29 10:19:14

madman 发表于 2016-3-29 08:59
dts里disabled掉，然后按普通io那样申请使用就可以了

i2c4: i2c@ff160000 {
compatible = "rockchip,rk30-i2c";
reg = <0xff160000 0x1000>;
interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
#address-cells = <1>;
#size-cells = <0>;
pinctrl-names = "default", "gpio";
pinctrl-0 = <&i2c4_sda &i2c4_scl>;
pinctrl-1 = <&i2c4_gpio>;
gpios = <&gpio7 GPIO_C1 GPIO_ACTIVE_LOW>, <&gpio7 GPIO_C2 GPIO_ACTIVE_LOW>;
clocks = <&clk_gates6 15>;
rockchip,check-idle = <1>;
status = "disabled";
};

i2c4在dts中的status = "disabled"的，但是为什么dev/下还有i2c4设备（crw-rw-rw- root root 89, 4 2011-01-01 12:00 i2c-4）？
我在自己的驱动中申请gpio是失败的啊！

junhai · 发表于 2016-3-29 14:43:02

madman 发表于 2016-3-29 14:04
去dts里面disabled，你这个是dtsi里面的，dts使能了的话会覆盖dtsi

谢谢，

junhai · 发表于 2016-3-29 20:04:28

madman 发表于 2016-3-29 14:04
去dts里面disabled，你这个是dtsi里面的，dts使能了的话会覆盖dtsi

dts里只有这个啊
&i2c4 {
status = "okay";
ts@55 {
compatible = "goodix,gt8xx";
reg = <0x55>;
touch-gpio = <&gpio7 GPIO_A6 IRQ_TYPE_LEVEL_LOW>;
reset-gpio = <&gpio7 GPIO_A5 GPIO_ACTIVE_LOW>;
//power-gpio = <&gpio0 GPIO_C5 GPIO_ACTIVE_LOW>;
max-x = <1280>;
max-y = <800>;
};

ts@01 {
compatible = "ct,vtl_ts";
reg = <0x01>;
screen_max_x = <2048>;
screen_max_y = <1536>;
irq_gpio_number = <&gpio7 GPIO_A6 IRQ_TYPE_LEVEL_LOW>;
rst_gpio_number = <&gpio7 GPIO_A5 GPIO_ACTIVE_HIGH>;
};
};