How to enable i2c1 in device tree for vybrid vf50 (interrupts)

[sandrostiller]

Hello,

I'm trying to enable the 2nd i2c in the device tree for my linux kernel.

I took the entries for the i2c0 and modified them with this result:

i2c1: i2c@40067000 {
  #address-cells = <1>;
  #size-cells = <0>;
  compatible = "fsl,vf610-i2c";
  reg = <0x40067000 0x1000>;
  clocks = <&clks VF610_CLK_I2C1>;
  clock-names = "ipg";
  dmas = <&edma0 0 52>,
  <&edma0 0 53>;
  dma-names = "rx","tx";
  status = "disabled";                                                    
}; 
...
...
&i2c1 {
  clock-frequency = <400000>;
  pinctrl-names = "default";
  pinctrl-0 = <&pinctrl_i2c1>;
  status = "okay";
};

While starting the kernel prints this message:

[	0.171667] imx-i2c 40067000.i2c: can't get irq number

I think that I must add an "interrupts" entry, but where can I find the correct number?

In my i2c-0 the number 71 was given, in an other device tree i2c-0 got the 103 and the i2c-1 the number 104

Thanks,

Sandro

[timesys_support · Accepted solution]

Hello Sandro,

You can try using the value "72" for the "interrupts" entry. This can be found in the Vybrid reference manual at table 3-1, Interrupt Assignment, as the NVIC Interrupt ID for i2c1. The other device tree that you link to specifies the GIC interrupt ID values.

Thanks,

Timesys Support

[karina_valencia]

Thank timesyssupport​

[karina_valencia]

timesyssupport​ can you help here?