Re: dts: question about how to configure PIO used as i2c irq

[Jean-Christophe PLAGNIOL-VILLARD <plagnioj-sclMFOaUSTBWk0Htik3J/w@public.gmane.org>]

On 10:53 Mon 15 Oct     , Bo Shen wrote:
> Hi All,
>   When moving atmel qt1070 linux driver with DT support. The atmel
> qt1070 is an I2C device. I meet the following questions.
> 
>   The qt1070 DT node
>   --<--------------
>   qt1070: keyboard@1b {
>         compatible = "atmel,qt1070";
>         reg = <0x1b>;
>         interrupt-parent = <&pioA>;
>         interrupts = <7 0x0>;
>   };
>   -->--------------
> 
>   DT will parse this node and map irq, the i2c_client->irq. This can
> be used directly in atmel qt1070 driver. However, the PIO which used
> as irq need configure as a PIO input. Now, we can not use
> irq_to_gpio() function to convert irq to gpio. So, if we can not
> configure this gpio.
> 
>   If we configure the pio in board-dt.c, I think this is not a good
> place. For example, if the kernel image support multiplatform, while
> on these platform, using different pio for qt1070, so this will
> cause only one platform can use qt1070.
> 
>   So, for this question, how should I solve it? Would you please
> give me some advice?
I already reply you in private 4 times

you have only 2 choice pass the gpio and manage in c
or configure the gpio as input in the xlate or map of the gpio drivers and the
mux via pinctrl

Best Regards,
J.