i2c error for ME port

[Vijay Khemka]

On 11/25/19, 3:21 PM, "Jae Hyun Yoo" <jae.hyun.yoo at linux.intel.com> wrote:

    > &i2c4 {
    >    status = "okay";
    >    // BMC Debug Header
    >    ipmb0 at 10 {
    >      compatible = "ipmb-dev";
    >      reg = <0x10>;
    >      i2c-protocol;
    >    };
    > };
    
    If it's for BMC-ME channel, you should add 'multi-master;' to enable H/W
    arbitration. Also, you should set the slave address like below after
    including '#include <dt-bindings/i2c/i2c.h>' in dts file.
    
    reg = <(0x10 | I2C_OWN_SLAVE_ADDRESS)>;
    
I changed to this
&i2c4 {
  status = "okay";
  multi-master;
  // BMC Debug Header
  ipmb0 at 10 {
    compatible = "ipmb-dev";
    reg = <0x40000010>;
    i2c-protocol;
  };
};
But no improvement. In fact sometimes I am unable to communicate with ME via i2c.
    Cheers,
    
    Jae