linux-kernel - Re: [PATCHv4 07/10] fbdev: ssd1307fb: Add a module parameter to set the refresh rate

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Message-ID: <20150319131824.GB4255@lukather>
Date:	Thu, 19 Mar 2015 14:18:24 +0100
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Thomas Niederprüm <niederp@...sik.uni-kl.de>
Cc:	plagnioj@...osoft.com, tomi.valkeinen@...com,
	kernel@...gutronix.de, shawn.guo@...aro.org, robh+dt@...nel.org,
	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv4 07/10] fbdev: ssd1307fb: Add a module parameter to set
 the refresh rate

On Mon, Mar 16, 2015 at 06:11:55PM +0100, Thomas Niederprüm wrote:
> This patch adds the module parameter "refreshrate" to set delay for the
> deferred io. The refresh rate is given in units of Hertz. The default
> refresh rate is 1 Hz. The refresh rate set through the newly introduced
> parameter applies to all instances of the driver and for now it is not
> possible to change it individually.
> 
> Signed-off-by: Thomas Niederprüm <niederp@...sik.uni-kl.de>
> ---
>  drivers/video/fbdev/ssd1307fb.c | 23 +++++++++++++++++------
>  1 file changed, 17 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c
> index 6fecec8..8a8d305 100644
> --- a/drivers/video/fbdev/ssd1307fb.c
> +++ b/drivers/video/fbdev/ssd1307fb.c
> @@ -42,6 +42,11 @@
>  #define	SSD1307FB_SET_COM_PINS_CONFIG	0xda
>  #define	SSD1307FB_SET_VCOMH		0xdb
>  
> +#define REFRASHRATE 1
> +
> +static u_int refreshrate = REFRASHRATE;

s/REFRASH/REFRESH/ :)

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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