linux-kernel - Re: [PATCHv5 11/11] fbdev: ssd1307fb: Add blank mode

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Date:	Wed, 25 Mar 2015 21:33:47 +0100
From:	Thomas Niederprüm <niederp@...sik.uni-kl.de>
To:	Olliver Schinagl <oliver@...inagl.nl>
Cc:	plagnioj@...osoft.com, tomi.valkeinen@...com,
	maxime.ripard@...e-electrons.com, kernel@...gutronix.de,
	shawn.guo@...aro.org, robh+dt@...nel.org,
	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv5 11/11] fbdev: ssd1307fb: Add blank mode

Am Wed, 25 Mar 2015 16:50:05 +0100
schrieb Olliver Schinagl <oliver@...inagl.nl>:

> Hey Thomas,
> 
> On 24-03-15 22:23, Thomas Niederprüm wrote:
> > This patch adds ssd1307fb_blank() to make the framebuffer capable
> > of blanking.
> >
> > Signed-off-by: Thomas Niederprüm <niederp@...sik.uni-kl.de>
> > ---
> >   drivers/video/fbdev/ssd1307fb.c | 13 +++++++++++++
> >   1 file changed, 13 insertions(+)
> >
> > diff --git a/drivers/video/fbdev/ssd1307fb.c
> > b/drivers/video/fbdev/ssd1307fb.c index 061cc95..9101b27 100644
> > --- a/drivers/video/fbdev/ssd1307fb.c
> > +++ b/drivers/video/fbdev/ssd1307fb.c
> > @@ -238,6 +238,18 @@ static ssize_t ssd1307fb_write(struct fb_info
> > *info, const char __user *buf, return count;
> >   }
> >
> > +static int ssd1307fb_blank(int blank_mode, struct fb_info *info)
> > +{
> > +	struct ssd1307fb_par *par = info->par;
> > +	int ret;
> > +
> > +	if (blank_mode != FB_BLANK_UNBLANK)
> > +		ret = ssd1307fb_write_cmd(par->client,
> > SSD1307FB_DISPLAY_OFF);
> > +	else
> > +		ret = ssd1307fb_write_cmd(par->client,
> > SSD1307FB_DISPLAY_ON);
> I'd probably add an extra return, or drop the ret var at all and just 
> return the function.
> 
> or even shorter :)
> return sd1307fb_write_cmd(par->client, (blank_mode !=
> FB_BLANK_UNBLANK) ? SSD1307FB_DISPLAY_OFF : SSD1307FB_DISPLAY_ON;

Wow, short and elegant. Thanks for the hint, I will include it in v6.

Thomas


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