linux-kernel - Re: [PATCH] arm64: dts: renesas: rzg3s-smarc: Add gpio keys

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Date: Fri, 12 Jan 2024 17:20:39 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: claudiu beznea <claudiu.beznea@...on.dev>
Cc: magnus.damm@...il.com, robh+dt@...nel.org, 
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org, 
	linux-renesas-soc@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, 
	Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH] arm64: dts: renesas: rzg3s-smarc: Add gpio keys

Hi Claudiu,

On Fri, Jan 12, 2024 at 4:38 PM claudiu beznea <claudiu.beznea@...on.dev> wrote:
> On 12.01.2024 15:55, Geert Uytterhoeven wrote:
> > On Wed, Dec 27, 2023 at 2:08 PM Claudiu <claudiu.beznea@...on.dev> wrote:
> >> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> >>
> >> RZ SMARC Carrier II board has 3 user buttons called USER_SW1, USER_SW2,
> >> USER_SW3. Add a DT node in device tree to propertly instantiate the
> >> gpio-keys driver for these buttons.
> >>
> >> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> >
> > Thanks for your patch!
> >
> >> --- a/arch/arm64/boot/dts/renesas/rzg3s-smarc.dtsi
> >> +++ b/arch/arm64/boot/dts/renesas/rzg3s-smarc.dtsi
> >> @@ -14,6 +15,37 @@ aliases {
> >>                 mmc1 = &sdhi1;
> >>         };
> >>
> >> +       keys {
> >
> > Do you mind if I s/keys/keypad/ while applying? ...
>
> Is not actually a keypad... there are 3 buttons in a corner of the board..
>
> I see only 2 entries in arm64 and arm DTS directory following this pattern
> for gpio-keys compatible node:
>
>  arch/arm/boot/dts/renesas/r8a7779-marzen.dts
>  arch/arm/boot/dts/renesas/r8a7779-marzen.dts
>
> But if you prefer it like this, I have nothing against.
>
> Just asking, do you have a particular reason for naming it like this?

See the discussion in [1], and the resulting patch[2], which added the
(so far) single user in arch/arm/boot/dts/renesas/r8a7779-marzen.dts

[1] https://lore.kernel.org/all/20231023144134.1881973-1-geert+renesas@glider.be
[2] https://lore.kernel.org/all/eec1ccfb75c6215428609fdcaf3a37c75fe1fc87.1698228163.git.geert+renesas@glider.be
>
> >> +                       interrupt-parent = <&pinctrl>;
> >
> > ... and move these one level up, to avoid duplication?
>
> Moving it just near compatible will make the schema validation to fail with
> this (driver is working, though):
>
> arch/arm64/boot/dts/renesas/r9a08g045s33-smarc.dtb: keys:
> 'interrupt-parent' does not match any of the regexes:
> '^(button|event|key|switch|(button|event|key|switch)-[a-z0-9-]+|[a-z0-9-]+-(button|event|key|switch))$',
> 'pinctrl-[0-9]+'
>         from schema $id: http://devicetree.org/schemas/input/gpio-keys.yaml#

Oops, I had completely forgotten r8a7779-marzen.dts triggers this, too...
Let's keep it for now.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68korg

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds