linux-kernel - Re: [PATCH v3] leds: provide helper to register "leds-gpio" devices

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Message-ID: <20110412214848.GI7806@n2100.arm.linux.org.uk>
Date:	Tue, 12 Apr 2011 22:48:48 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
Cc:	Richard Purdie <rpurdie@...ys.net>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	linux-kernel@...r.kernel.org, kernel@...gutronix.de,
	Andrew Morton <akpm@...ux-foundation.org>,
	H Hartley Sweeten <hartleys@...ionengravers.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3] leds: provide helper to register "leds-gpio" devices

On Mon, Apr 11, 2011 at 10:35:57PM +0200, Uwe Kleine-König wrote:
> diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
> index 9bec869..e8e101e 100644
> --- a/drivers/leds/Kconfig
> +++ b/drivers/leds/Kconfig
> @@ -14,6 +14,11 @@ config LEDS_CLASS
>  	  This option enables the led sysfs class in /sys/class/leds.  You'll
>  	  need this to do anything useful with LEDs.  If unsure, say N.
>  
> +config LED_REGISTER_GPIO
> +	bool
> +	help
> +	  This option provides the function gpio_led_register_device.
> +
>  if NEW_LEDS
>  
>  comment "LED drivers"
> diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
> index 39c80fc..ca428bd 100644
> --- a/drivers/leds/Makefile
> +++ b/drivers/leds/Makefile
> @@ -3,6 +3,7 @@
>  obj-$(CONFIG_NEW_LEDS)			+= led-core.o
>  obj-$(CONFIG_LEDS_CLASS)		+= led-class.o
>  obj-$(CONFIG_LEDS_TRIGGERS)		+= led-triggers.o
> +obj-y					+= led-register.o

Why not obj-$(CONFIG_LED_REGISTER_GPIO) += led-register.o

rather than wrapping the code of led-register.c with a #ifdef for the
same symbol?
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