RK3399 I2C使用问题请教

Chip Platform Rockchip
1

刚拿到板子,想添加一个I2C设备,但是怎么都进不去probe , 请教下各位是哪里的问题啊.

板子是RK3399-JD4 , Kernel的编译参数是make -j8 ARCH=arm64 rk3399-firefly-aiojd4.img

在rk3399-firefly-port.dtsi 文件I2C1里面添加设备信息如下:

&i2c1 {
	status = "okay";
	i2c-scl-rising-time-ns = <300>;
	i2c-scl-falling-time-ns = <15>;

	rt5640: rt5640@1c {
		#sound-dai-cells = <0>;
		compatible = "realtek,rt5640";
		reg = <0x1c>;
		clocks = <&cru SCLK_I2S_8CH_OUT>;
		clock-names = "mclk";
		realtek,in1-differential;
		pinctrl-names = "default";
		pinctrl-0 = <&rt5640_hpcon &i2s_8ch_mclk>;
		hp-con-gpio = <&gpio4 21 GPIO_ACTIVE_HIGH>;
		//hp-det-gpio = <&gpio4 28 GPIO_ACTIVE_LOW>;
		io-channels = <&saradc 4>;
		hp-det-adc-value = <500>;
	};

	cymbr3116@7A {
		compatible = "cymbr3116";
		reg = <0x7A>;
		status = "okay";
	};
};

其中cymbr3116是我添加的设备信息, I2C1我从/sys/bus/i2c/device看是已经挂在上了的.

然后设备驱动源码如下:

#if CONFIG_OF
static struct of_device_id cy311x_of_mach[] = {
    {.compatible = "cymbr3116" , },
    {},
};
MODULE_DEVICE_TABLE(of, cy311x_of_mach);
#endif

static int  cy3x_tk_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
    printk("cymbr311x into probe.\n");
    return 0;
}

static int cy3x_tk_remove(struct i2c_client *client)
{
    printk("cymbr311x into remove.\n");
    return 0;
}

static const struct i2c_device_id cy3xctouch_id[] = {
	{ "cymbr3116", 0 },
	{ },
};
MODULE_DEVICE_TABLE(i2c, cy3xctouch_id);

static struct i2c_driver cy3xtouch_i2c_driver  = {
	.driver = {
		.name  = "cymbr3116",
        #if CONFIG_OF
		.of_match_table = of_match_ptr(cy311x_of_mach),
        #endif
	},
	.probe		= cy3x_tk_probe,
	.remove		= cy3x_tk_remove,
	.id_table	= cy3xctouch_id,
};

module_i2c_driver(cy3xtouch_i2c_driver);

但是怎么都进不去probe , 请教下是哪里有错误啊.

谢谢!!!

2

补充下, I2C的驱动应该是成功了的, /sys/bus/i2c/drivers 里面能看到驱动

3

我看官方WIKI 里面的DEMO , gslx680 , 也进不去probe , 我已经吧状态从disabled 修改为okay了. ,还是进不去.

&i2c4 {
    gsl3680: gsl3680@41 {
	      status = "okay";
              compatible = "gslX680";
              reg = <0x41>;
              screen_max_x = <1536>;
              screen_max_y = <2048>;
              touch-gpio = <&gpio1 20 IRQ_TYPE_LEVEL_LOW>;
              reset-gpio = <&gpio0 12 GPIO_ACTIVE_HIGH>;
      };

	mpu6050:mpu@68{
            status = "disabled";
            compatible = "invensense,mpu6050";
            reg = <0x68>;
            mpu-int_config = <0x10>;
            mpu-level_shifter = <0>;
            mpu-orientation = <0 1 0 1 0 0 0 0 1>;
            orientation-x= <1>;
            orientation-y= <1>;
            orientation-z= <1>;
            irq-gpio = <&gpio1 4 IRQ_TYPE_LEVEL_LOW>;
            mpu-debug = <1>;
        };

};
4

我貌似找到问题了， 编译kernel生成的resource.img ，我没有烧写。

所以dtb并没有更新。

小白伤不起， 晚上没板子， 明天验证下。

5

解决了吗？

6

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