Re: [PATCH v4 06/14] MIPS: jz4740: DTS: Add nodes for ingenic pinctrl and gpio drivers

Linus Walleij
2017-04-07T09:44:31Z

On Sun, Apr 2, 2017 at 10:42 PM, Paul Cercueil <paul@crapouillou.net> wrote:

> For a description of the pinctrl devicetree node, please read
> Documentation/devicetree/bindings/pinctrl/ingenic,pinctrl.txt
>
> For a description of the gpio devicetree nodes, please read
> Documentation/devicetree/bindings/gpio/ingenic,gpio.txt
>
> Signed-off-by: Paul Cercueil <paul@crapouillou.net>
> ---
> arch/mips/boot/dts/ingenic/jz4740.dtsi | 61 ++++++++++++++++++++++++++++++++++
> 1 file changed, 61 insertions(+)
>
> v2: Changed the devicetree bindings to match the new driver
> v3: No changes
> v4: Update the bindings for the v4 version of the drivers
(...)

> + pinctrl: ingenic-pinctrl@10010000 {
> + compatible = "ingenic,jz4740-pinctrl";
> + reg = <0x10010000 0x400>;
> +
> + gpa: gpio-controller@0 {
> + compatible = "ingenic,gpio-bank-a", "ingenic,jz4740-gpio";

As Sergei and Rob notes, the bank compatible properties look
a bit strange. Especially if they are all the same essentially.

I like Sergei's idea to simply use the reg property if what you want
is really a unique ID number. What do you think about this?

Yours,
Linus Walleij