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How to change UART1 (Console) Pad on Android 5.x

Question asked by David Wu on Nov 4, 2016
Latest reply on Nov 6, 2016 by David Wu

Hi All,

  I have a customize board using i.mx6. Because we need using 16bit camera I/F, so we change uart1 console pad for CSI0_DAT10 and CSI0_DAT11 to SD3_DAT7 and SD3_DAT6.

 

 I modify uart1_pad[] in u-boot. It's working properly, I can get and wrire command on u-boot.

 But It's not workin on the kernel (boot.img). I did the modification as below:

 

in <imx6qdl-sabresd.dtsi> I modify ::

 

---->>> Original  <<<-----

 pinctrl_uart1: uart1grp {
   fsl,pins = <
    MX6QDL_PAD_CSI0_DAT10__UART1_TX_DATA 0x1b0b1
    MX6QDL_PAD_CSI0_DAT11__UART1_RX_DATA 0x1b0b1
   >;
  };

 

---->>> My Board <<<-----

  pinctrl_uart1: uart1grp {
   fsl,pins = <
    MX6QDL_PAD_SD3_DAT7__UART1_TX_DATA 0x1b0b1
    MX6QDL_PAD_SD3_DAT6__UART1_RX_DATA 0x1b0b1
   >;
  };

 and Remove PAD_SD3_DAT4 ~ PAD_SD3_DAT7 on <pinctrl_usdhc3>

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

My problems:

1). I got kernel log form pad SD3_DAT7, But  I cann't  input any command or characters.

2). I also can got kernel log form pad  SD3_DAT7  if i using default pad config (CSI0_DAT10),

 

How do i to modify pads for My boad ? Thanks!

 

BR.

David Wu

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