linux-kernel - Re: [PATCH] leds: Add Chrome OS keyboard backlight LEDs driver

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Date:	Fri, 4 Mar 2016 22:48:42 +0100
From:	Jacek Anaszewski <jacek.anaszewski@...il.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Jacek Anaszewski <j.anaszewski@...sung.com>,
	Evan McClain <aeroevan@...il.com>,
	Richard Purdie <rpurdie@...ys.net>,
	Bryan Wu <cooloney@...il.com>, Simon Que <sque@...omium.org>,
	Olof Johansson <olofj@...omium.org>,
	Duncan Laurie <dlaurie@...omium.org>,
	Guenter Roeck <groeck@...omium.org>,
	linux-kernel@...r.kernel.org, linux-leds@...r.kernel.org
Subject: Re: [PATCH] leds: Add Chrome OS keyboard backlight LEDs driver

On 03/04/2016 09:59 PM, Dmitry Torokhov wrote:
> On Fri, Mar 04, 2016 at 09:55:24PM +0100, Jacek Anaszewski wrote:
>> On 03/04/2016 08:13 PM, Dmitry Torokhov wrote:
>>> On Fri, Mar 04, 2016 at 10:38:40AM +0100, Jacek Anaszewski wrote:
>>>> Hi Evan,
>>>>
>>>> On 03/04/2016 09:38 AM, Evan McClain wrote:
>>>>> On Thu, 2016-03-03 at 15:46 -0800, Dmitry Torokhov wrote:
>>>>>> From: Simon Que <sque@...omium.org>
>>>>>>
>>>>>> This is a driver for ACPI-based keyboard backlight LEDs found on
>>>>>> Chromebooks. The driver locates \\_SB.KBLT ACPI device and exports
>>>>>> backlight as "chromeos::kbd_backlight" LED class device in sysfs.
>>>>>
>>>>> Was it ever decided where this driver should live? I was planning on
>>>>> submitting to platform/chrome since most keyboard backlights seem to
>>>>> live over there but I don't think I got a response.
>>>>>
>>>>
>>>> It hasn't been decided yet. I can take it, but could you submit one more
>>>> version, without
>>>>
>>>> 'owner	= THIS_MODULE' in struct platform_driver keyboard_led_driver ?
>>>>
>>>> It is redundant, because the core will do it.
>>>>
>>>> Also the line with devm_kzalloc has over 80 characters.
>>>
>>> Also:
>>>
>>> - preferably use sizeof(*cdev) instead of sizeof(struct ...)
>>> - do not check cdev->flags & LED_SUSPENDED in
>>>    keyboard_led_set_brightness() as it is not going to be called when led
>>>    device is suspended anyway
>>> - change the MODULE_LICENSE from "GPL v2" to "GPL" as to match the
>>
>> I can see "either version 2 of the License" in the license notice.
>
>>>From module.h:
>
>   *	"GPL"				[GNU Public License v2 or later]
>   *	"GPL v2"			[GNU Public License v2]
>
> leds-chromeos-keyboard is GPL v2+ so module license should be "GPL".


That's surprising. Thanks for spotting this.

-- 
Best Regards,
Jacek Anaszewski