linux-kernel - Re: [PATCH v3 00/25] Add generic support for composing LED class device name

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Date:   Sat, 6 Apr 2019 11:46:32 +0200
From:   Pavel Machek <pavel@....cz>
To:     Jacek Anaszewski <jacek.anaszewski@...il.com>
Cc:     linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, robh@...nel.org
Subject: Re: [PATCH v3 00/25] Add generic support for composing LED class
 device name

Hi!

> >I have not yet gone through the series in great detail.
> >
> >This will change the userland ABI, right? Now, I understand that old ABI is bad, but
> >will it break someone's code?
> 
> It will not break anyone since the generic support for composing
> LED names is used only if struct init_data is provided. Otherwise
> led_cdev->name property is taken as is for the LED class device name.
> 
> Moreover, it is safe to switch many of existing DT (or fwnode in
> general) based drivers to using generic mechanism.
> If the DT provides label property it will be concatenated with the
> led_hw_name provided by the driver. The problem would be only with
> the drivers whose bindings erroneously require devicename section
> in the label. They will need to be left intact.

Ok. Plus it seems series causes some compile issues:

 924     kbuild tes [j.anaszewski-leds:led_naming_v3 13/37]
 drivers/leds/leds-pwm.c:117:8: error:
  925 N   kbuild tes [j.anaszewski-leds:led_naming_v3 17/37]
 drivers/leds/led-core.o:undefined ref
  926 N   kbuild tes [j.anaszewski-leds:led_naming_v3 13/37]
 drivers/leds/leds-pwm.c:117:44: spars
  927 N   kbuild tes [j.anaszewski-leds:led_naming_v3 13/37]
 drivers/leds/leds-pwm.c:117:8: error:

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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