linux-kernel - Re: [PATCH v2 32/48] arm64: dts: rockchip: align gpio-key node names with dtschema

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Message-ID: <e6406956-07b7-d217-f8f4-ef6168647cc2@linaro.org>
Date:   Thu, 9 Jun 2022 17:05:49 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Heiko Stübner <heiko@...ech.de>,
        Maya Matuszczyk <maccraft123mc@...il.com>
Cc:     Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
        arm@...nel.org, soc@...nel.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree <devicetree@...r.kernel.org>,
        arm-mail-list <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 32/48] arm64: dts: rockchip: align gpio-key node names
 with dtschema

On 09/06/2022 16:56, Heiko Stübner wrote:
> Am Donnerstag, 9. Juni 2022, 16:15:25 CEST schrieb Krzysztof Kozlowski:
>> On 09/06/2022 15:57, Maya Matuszczyk wrote:
>>> czw., 9 cze 2022 o 13:56 Krzysztof Kozlowski
>>> <krzysztof.kozlowski@...aro.org> napisał(a):
>>>>
>>>> The node names should be generic and DT schema expects certain pattern
>>>> (e.g. with key/button/switch).
>>>>
>>>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
>>>> ---
>>>>  arch/arm64/boot/dts/rockchip/rk3308-evb.dts   |  2 +-
>>>>  .../boot/dts/rockchip/rk3326-odroid-go2.dts   | 32 +++++++++----------
>>>>  .../boot/dts/rockchip/rk3328-nanopi-r2s.dts   |  2 +-
>>>>  arch/arm64/boot/dts/rockchip/rk3368-evb.dtsi  |  2 +-
>>>>  .../boot/dts/rockchip/rk3368-geekbox.dts      |  2 +-
>>>>  .../dts/rockchip/rk3368-orion-r68-meta.dts    |  2 +-
>>>>  .../boot/dts/rockchip/rk3368-px5-evb.dts      |  2 +-
>>>>  arch/arm64/boot/dts/rockchip/rk3368-r88.dts   |  2 +-
>>>>  .../boot/dts/rockchip/rk3399-firefly.dts      |  2 +-
>>>>  .../dts/rockchip/rk3399-gru-chromebook.dtsi   |  2 +-
>>>>  .../boot/dts/rockchip/rk3399-gru-kevin.dts    |  2 +-
>>>>  .../boot/dts/rockchip/rk3399-gru-scarlet.dtsi |  2 +-
>>>>  .../boot/dts/rockchip/rk3399-khadas-edge.dtsi |  2 +-
>>>>  .../boot/dts/rockchip/rk3399-nanopi-r4s.dts   |  4 +--
>>>>  .../boot/dts/rockchip/rk3399-nanopi4.dtsi     |  2 +-
>>>>  .../boot/dts/rockchip/rk3399-orangepi.dts     |  2 +-
>>>>  .../boot/dts/rockchip/rk3399-pinebook-pro.dts |  4 +--
>>>>  .../boot/dts/rockchip/rk3399-roc-pc.dtsi      |  2 +-
>>>>  .../boot/dts/rockchip/rk3399-rockpro64.dtsi   |  2 +-
>>>>  .../boot/dts/rockchip/rk3399-sapphire.dtsi    |  2 +-
>>>>  .../boot/dts/rockchip/rk3566-pinenote.dtsi    |  2 +-
>>>>  21 files changed, 38 insertions(+), 38 deletions(-)
>>>>
>>>> diff --git a/arch/arm64/boot/dts/rockchip/rk3308-evb.dts b/arch/arm64/boot/dts/rockchip/rk3308-evb.dts
>>>> index 9b4f855ea5d4..4b5413b12bfa 100644
>>>> --- a/arch/arm64/boot/dts/rockchip/rk3308-evb.dts
>>>> +++ b/arch/arm64/boot/dts/rockchip/rk3308-evb.dts
>>>> @@ -75,7 +75,7 @@ gpio-keys {
>>>>                 pinctrl-names = "default";
>>>>                 pinctrl-0 = <&pwr_key>;
>>>>
>>>> -               power {
>>>> +               power-key {
> 
> hmm, it looks like all the others below are named key-power, while
> only this uses power-key ?
> 

Because a bit earlier in DTS, there are two adc-keys nodes with "key"
suffix, so I kept that approach to be consistent within one DTS. If you
prefer, I can change it to key-power.

> 
>>>>                         gpios = <&gpio0 RK_PA6 GPIO_ACTIVE_LOW>;
>>>>                         linux,code = <KEY_POWER>;
>>>>                         label = "GPIO Key Power";
>>>> diff --git a/arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts b/arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts
>>>> index ea0695b51ecd..72328dd993ee 100644
>>>> --- a/arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts
>>>> +++ b/arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts
>>>> @@ -71,82 +71,82 @@ gpio-keys {
>>>>                  * |------------------------------------------------|
>>>>                  */
>>>>
>>>> -               sw1 {
>>>> +               switch-1 {
>>> Wouldn't it make more sense to rename this and all other
>>> renamed nodes in this dts into "button-dpad-up" or "button-1",
>>> as on the physical device those are buttons and the naming
>>> scheme of "sw" + number seems to be a carryover from
>>> downstream sources.
> 
> The naming actually carries over from the device itself.
> In the schematics the relevant keys are also named sw1, sw2, etc.
> 
> And I do believe it is way nicer when devicetree names correspond to the
> things you find in device schematics and not be named "arbitarily" to
> only conform to some schema ;-)

Then you are entirely depending on hardware engineers which might start
calling their buttons "cute-pony-xxx" :)

> 
> So personally I'd actually prefer going with switch-sw1 (or button-sw1 if
> you prefer) as being able to just use the search function in schematic pdfs
> is a helpful tool.

Both are fine with me, let's just pick one - switch-sw1 or button-sw1.
Since these are physically buttons, I propose the latter.


Best regards,
Krzysztof