linux-kernel - Re: [PATCH v6 1/5] platform: x86-android-tablets: other: Add swnode for Xiaomi pad2 indicator LED

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Date: Thu, 18 Apr 2024 15:46:07 +0800
From: Kate Hsuan <hpa@...hat.com>
To: Andy Shevchenko <andy.shevchenko@...il.com>
Cc: Pavel Machek <pavel@....cz>, Lee Jones <lee@...nel.org>, linux-leds@...r.kernel.org, 
	platform-driver-x86@...r.kernel.org, Hans de Goede <hdegoede@...hat.com>, 
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>, 
	André Apitzsch <git@...tzsch.eu>, 
	linux-kernel@...r.kernel.org, Sebastian Reichel <sre@...nel.org>, linux-pm@...r.kernel.org
Subject: Re: [PATCH v6 1/5] platform: x86-android-tablets: other: Add swnode
 for Xiaomi pad2 indicator LED

Hi Andy,

Thank you for reviewing.

On Tue, Apr 16, 2024 at 9:46 PM Andy Shevchenko
<andy.shevchenko@...il.com> wrote:
>
> On Tue, Apr 16, 2024 at 8:39 AM Kate Hsuan <hpa@...hat.com> wrote:
> >
> > KTD2026 LED controller manages the indicator LED for Xiaomi pad2. The ACPI
> > for it is not properly made so the kernel can't get a correct description.
> >
> > This work adds a description for this RGB LED controller and also sets a
> > trigger to indicate the changing event (bq27520-0-charging). When it is
> > charging, the indicator LED will be turned on.
>
> ...
>
> > +/*
> > + * The fwnode for ktd2026 on Xaomi pad2. It composed of a RGB LED node
>
> is composed

Okay.

>
> > + * with three subnodes for each color. The RGB LED node is named
> > + * "multi-led" to align with the name in the device tree.
> > + */
>
> ...
>
> > +static const struct software_node ktd2026_node = {
> > +       .name = "ktd2026"
>
> Please, leave a trailing comma as it's not a termination entry.

Okay.

>
> > +};
>
> (TBH I'm still unsure that having a name is a good idea even if it's
> supposed to be only a single device on the platform, but it's up to
> Hans who has an experience with those.)

Hans gave me an example without a name. I think, it can be dropped.
Moreover, Only one KTD2026 is on Xiaomi Pad2 so having a name is ok too.

>
> --
> With Best Regards,
> Andy Shevchenko
>


-- 
BR,
Kate