linux-kernel - Re: [PATCH v4 1/2] platform: x86-android-tablets: other: Add swnode for Xiaomi pad2 indicator LED

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Date: Tue, 12 Mar 2024 12:35:38 +0200 (EET)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Andy Shevchenko <andy.shevchenko@...il.com>
cc: Kate Hsuan <hpa@...hat.com>, 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>, 
    André Apitzsch <git@...tzsch.eu>, 
    LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 1/2] platform: x86-android-tablets: other: Add swnode
 for Xiaomi pad2 indicator LED

On Tue, 12 Mar 2024, Andy Shevchenko wrote:

> Wed, Mar 06, 2024 at 10:58:00AM +0800, Kate Hsuan kirjoitti:
> > There is a KTD2026 LED controller to manage the indicator LED for Xiaomi
> > pad2. The ACPI for it is not properly made so the kernel can't get
> > a correct description of it.
> > 
> > This work add a description for this RGB LED controller and also set a
> > trigger to indicate the chaging event (bq27520-0-charging). When it is
> > charging, the indicator LED will be turn on.
> 
> Ilpo, Kate, please consider the following remarks.
> 
> ...
> 
> >  #include <linux/gpio/machine.h>
> >  #include <linux/input.h>
> >  #include <linux/platform_device.h>
> 
> + Blank line?
> 
> > +#include <dt-bindings/leds/common.h>
> 
> Not sure where to place this, some drivers put it the first, some after linux/*.
> 
> ...
> 
> > +/* main fwnode for ktd2026 */
> > +static const struct software_node ktd2026_node = {
> 
> No name?
> 
> > +};
> > +
> > +static const struct property_entry ktd2026_rgb_led_props[] = {
> > +	PROPERTY_ENTRY_U32("reg", 0),
> > +	PROPERTY_ENTRY_U32("color", LED_COLOR_ID_RGB),
> > +	PROPERTY_ENTRY_STRING("function", "indicator"),
> 
> > +	PROPERTY_ENTRY_STRING("linux,default-trigger",
> > +			      "bq27520-0-charging"),
> 
> It's less than 80, why not on a single line?
> 
> > +
> 
> Redundant blank line.
> 
> > +	{ }
> > +};
> 
> ...
> 
> > +/* B */
> 
> B for red?!
> 
> > +static const struct property_entry ktd2026_red_led_props[] = {
> > +	PROPERTY_ENTRY_U32("reg", 0),
> > +	PROPERTY_ENTRY_U32("color", LED_COLOR_ID_BLUE),
> > +	{ }
> > +};

The name with "red" and LED_COLOR_ID_BLUE are also inconsistent.

> ...
> 
> > +/* R */
> 
> R for blue?!
> 
> > +static const struct property_entry ktd2026_blue_led_props[] = {
> > +	PROPERTY_ENTRY_U32("reg", 2),
> > +	PROPERTY_ENTRY_U32("color", LED_COLOR_ID_RED),
> > +	{ }
> > +};

Here as well.

I think it's better I drop this patch (it's only in review-ilpo) and wait 
for v5 version as there's some much still to correct.


-- 
 i.