Re: [PATCH 2/3] doc,dts - add XRA1403 DTS binding documentation

[Linus Walleij]

On Mon, Mar 27, 2017 at 8:23 AM, Nandor Han <nandor.han@xxxxxx> wrote:

> Add the XRA1403 DTS binding documentation.
>
> Signed-off-by: Nandor Han <nandor.han@xxxxxx>

There is no big problem with this but:

> +The XRA1403 is an 16-bit GPIO expander with an SPI interface. Features available:
> +       - Individually programmable inputs:
> +               - Internal pull-up resistors
> +               - Polarity inversion
> +               - Individual interrupt enable
> +               - Rising edge and/or Falling edge interrupt
> +               - Input filter

Since you mention that it has interrupts maybe you want to add bindings
for the cascaded interrupt and the interrupt-controller; keyword etc
already now.

We just document what the hardware can do, we don't have to do all
of it in the first Linux driver submission.

Yours,
Linus Walleij