imx8mm on android9 i2c4 enable fail??

[13660284951]

hello,nxp

our soc is imx8mm and os is android9.0

from fsl_imx8mm_evk.dts,we can see i2c4 is not enable and the pin had resued。

so delete the mux pin。

below is my i2c4 dts

pinctrl_i2c4: i2c4grp {
    fsl,pins = <
      MX8MM_IOMUXC_I2C4_SCL_I2C4_SCL 0x400001c3
      MX8MM_IOMUXC_I2C4_SDA_I2C4_SDA 0x400001c3
    >;
};

&i2c4 {
    clock-frequency = <100000>;
    pinctrl-names = "default";
    pinctrl-0 = <&pinctrl_i2c4>;
    status = "okay";

    goodix_ts:goodix_ts@28 {
    compatible = "goodix,gt1x";
    reg = <0x28>;
    interrupt-parent = <&gpio1>;
    interrupts = <7 0x2>;
    vdd_ana-supply = <&reg_usdhc2_vmmc>;
    pinctrl-names = "default";
    pinctrl-0 = <&pinctrl_ts_int_pull_up>;
    goodix,reset-gpio = <&gpio1 7 0x00>;
    goodix,irq-gpio = <&gpio1 6 0x00>;
    goodix,default-config0 = [
       5c 00 12 11 10 11 5f 00 cc bb
      22 00 11 00 00 00 00 00 00 00
    ];
    goodix,charger-config2 = [
      5f 00 12 11 10 11 5f 00 cc bb
      23 00 11 00 00 00 00 00 00 00
    ];
  };
};

from start log:we could know i2c1,i2c2 and i2c3 is enable,but i2c4 is not enable

[weidong_sun]

Hi Zhouwei,

   In fsl-imx8mm-evk.dts, you can find I2C4_SCL and I2C4_SDA pins have been used by default:

-----------------------------------------------------------------------------

        pinctrl_pcie0: pcie0grp {
            fsl,pins = <
                MX8MM_IOMUXC_I2C4_SCL_PCIE1_CLKREQ_B    0x61 /* open drain, pull up */
                MX8MM_IOMUXC_GPIO1_IO05_GPIO1_IO5    0x41
                MX8MM_IOMUXC_SAI2_RXFS_GPIO4_IO21    0x41
            >;
        };

        pinctrl_sai3: sai3grp {
            fsl,pins = <
                MX8MM_IOMUXC_SAI3_TXFS_SAI3_TX_SYNC     0xd6
                MX8MM_IOMUXC_SAI3_TXC_SAI3_TX_BCLK      0xd6
                MX8MM_IOMUXC_SAI3_MCLK_SAI3_MCLK        0xd6
                MX8MM_IOMUXC_SAI3_TXD_SAI3_TX_DATA0     0xd6
                MX8MM_IOMUXC_I2C4_SDA_GPIO5_IO21        0xd6
            >;
        };

-----------------------------------------------------------------------------------

If you want to use it as I2C4, you should comment or delete above 2 lines at first.

Then add your above code for I2C4 to the dts file.

Hope the information is helpful to you.

Have a nice day!

B.R,

Weidong

[13660284951]

thks Wigros Sun

i had been delete there pins

but the i2c4 is still fail,

the i2c_imx.c probe function is not recoginse the i2c4。

[weidong_sun]

Is I2C4 in your schematic 3.3V or 1.8V?

[13660284951]

the soc section is 1.8V,but we pull it to 3.3,

i had a doubt why i2c-imx.c is not recognise i2c4,dts is below,i can not see any wrong

[weidong_sun · Accepted solution]

Try the setting for I2C4 PAD:

MX8MM_IOMUXC_I2C4_SCL_I2C4_SCL    0xc3      // change 0x400001C3 to 0xc3 
MX8MM_IOMUXC_I2C4_SDA_I2C4_SDA    0xc3    // change 0x400001C3 to 0xc3 

weidong

[13660284951]

i2c4 is ok now,thks   Wigros Sun