linux-kernel - Re: [PATCH] atmel_lcdfb: backlight control

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Message-Id: <20080123140610.4509f165.akpm@linux-foundation.org>
Date:	Wed, 23 Jan 2008 14:06:10 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Nicolas Ferre <nicolas.ferre@...el.com>
Cc:	linux-fbdev-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, david-b@...bell.net,
	linux@...im.org.za, linux-arm-kernel@...ts.arm.linux.org.uk
Subject: Re: [PATCH] atmel_lcdfb: backlight control

> On Fri, 18 Jan 2008 15:44:35 +0100 Nicolas Ferre <nicolas.ferre@...el.com> wrote:
> From: David Brownell <dbrownell@...rs.sourceforge.net>
> 
> On the sam9 EK boards, the LCD backlight is hooked up to a PWM output
> from the LCD controller.  It's controlled by "contrast" registers though.
> 
> This patch lets boards declare that they have that kind of backlight
> control.  The driver can then export this control, letting screenblank
> and other operations actually take effect ... reducing the typically
> substantial power drain from the backlight.
> 
> +static inline void init_backlight(struct atmel_lcdfb_info *sinfo)
> +static inline void exit_contrast(struct atmel_lcdfb_info *sinfo)
> +static inline void init_backlight(struct atmel_lcdfb_info *sinfo)
> +static inline void exit_contrast(struct atmel_lcdfb_info *sinfo)
> +static inline void init_contrast(struct atmel_lcdfb_info *sinfo)

You really don't need to add manual inlining.  The compiler takes
care of it.
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