Re: [PATCH RESEND] Documentation: devicetree: Clean up gpio-keys example

Julien Chauveau
2016-03-10T23:08:49Z

> Le 8 mars 2016 à 11:16, Andreas Färber <afaerber@suse.de> a écrit :
>
> Am 08.03.2016 um 10:41 schrieb Julien Chauveau:
>> Le 8 mars 2016 à 09:54, Geert Uytterhoeven <geert@linux-m68k.org> a écrit :
>>> On Mon, Mar 7, 2016 at 7:24 PM, Andreas Färber <afaerber@suse.de> wrote:
>>>> Drop #address-cells and #size-cells, which are not required by the
>>>> gpio-keys binding documentation, as button sub-nodes are not devices.
>>>>
>>>> Reported-by: Julien Chauveau <chauveau.julien@gmail.com>
>>>> Signed-off-by: Andreas Färber <afaerber@suse.de>
>>>> ---
>>>> Documentation/devicetree/bindings/input/gpio-keys.txt | 2 --
>>>> 1 file changed, 2 deletions(-)
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/input/gpio-keys.txt b/Documentation/devicetree/bindings/input/gpio-keys.txt
>>>> index 21641236c095..1552a11f6786 100644
>>>> --- a/Documentation/devicetree/bindings/input/gpio-keys.txt
>>>> +++ b/Documentation/devicetree/bindings/input/gpio-keys.txt
>>>> @@ -34,8 +34,6 @@ Example nodes:
>>>>
>>>> gpio_keys {
>>>> compatible = "gpio-keys";
>>>> - #address-cells = <1>;
>>>> - #size-cells = <0>;
>>>> autorepeat;
>>>> button@21 {
>>>
>>> FYI, with "[PATCH] scripts/dtc: Update to upstream version 53bf130b1cdd":
>>> (http://www.spinics.net/lists/devicetree/msg117206.html) applied:
>>>
>>> Warning (unit_address_vs_reg): Node /keyboard/button@21 has a unit
>>> name, but no reg property
>>>
>>
>> Hi Andreas,
>> This means you can also drop the unit-address (the @21 part) for the button.
>> What about using a more relevant name like "key_up" instead of "button"?
>
> Or in my case power-key or power-button. Or would just power suffice?

For the example nodes of the documentation, according to the labels you’ll probably want to use "up" and "down" (or "key-up" and "key-down", or "up-key" and "down-key").

For the Geekbox, I think "power" is meaningful enough.

>
> The Landingship baseboard does have four more buttons not yet enabled,
> so I do need some way to distinguish nodes.

The labels on the board are key1, key2, key3 and key4. Maybe you can use that?