* [PATCH 1/3] radeonfb: Speed up the I2C buses
@ 2008-02-12 9:19 Jean Delvare
2008-02-12 20:56 ` Benjamin Herrenschmidt
0 siblings, 1 reply; 2+ messages in thread
From: Jean Delvare @ 2008-02-12 9:19 UTC (permalink / raw)
To: Benjamin Herrenschmidt; +Cc: linux-fbdev-devel
There is no reason to drive the radeon I2C buses at such a low
speed, so bump it from 12.5 kbps to 50 kbps. The Intel (i810) and
Matrox framebuffer drivers already run their I2C bus at this speed.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
---
This patch was already sent on:
* 2007-03-08
* 2007-09-09
drivers/video/aty/radeon_i2c.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- linux-2.6.21-git.orig/drivers/video/aty/radeon_i2c.c 2007-05-09 10:52:26.000000000 +0200
+++ linux-2.6.21-git/drivers/video/aty/radeon_i2c.c 2007-05-09 10:55:51.000000000 +0200
@@ -77,7 +77,7 @@ static int radeon_setup_i2c_bus(struct r
chan->algo.setscl = radeon_gpio_setscl;
chan->algo.getsda = radeon_gpio_getsda;
chan->algo.getscl = radeon_gpio_getscl;
- chan->algo.udelay = 40;
+ chan->algo.udelay = 10;
chan->algo.timeout = 20;
chan->algo.data = chan;
--
Jean Delvare
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH 1/3] radeonfb: Speed up the I2C buses
2008-02-12 9:19 [PATCH 1/3] radeonfb: Speed up the I2C buses Jean Delvare
@ 2008-02-12 20:56 ` Benjamin Herrenschmidt
0 siblings, 0 replies; 2+ messages in thread
From: Benjamin Herrenschmidt @ 2008-02-12 20:56 UTC (permalink / raw)
To: linux-fbdev-devel
On Tue, 2008-02-12 at 10:19 +0100, Jean Delvare wrote:
> There is no reason to drive the radeon I2C buses at such a low
> speed, so bump it from 12.5 kbps to 50 kbps. The Intel (i810) and
> Matrox framebuffer drivers already run their I2C bus at this speed.
>
> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Ack.
> ---
> This patch was already sent on:
> * 2007-03-08
> * 2007-09-09
>
> drivers/video/aty/radeon_i2c.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> --- linux-2.6.21-git.orig/drivers/video/aty/radeon_i2c.c 2007-05-09 10:52:26.000000000 +0200
> +++ linux-2.6.21-git/drivers/video/aty/radeon_i2c.c 2007-05-09 10:55:51.000000000 +0200
> @@ -77,7 +77,7 @@ static int radeon_setup_i2c_bus(struct r
> chan->algo.setscl = radeon_gpio_setscl;
> chan->algo.getsda = radeon_gpio_getsda;
> chan->algo.getscl = radeon_gpio_getscl;
> - chan->algo.udelay = 40;
> + chan->algo.udelay = 10;
> chan->algo.timeout = 20;
> chan->algo.data = chan;
>
>
>
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^ permalink raw reply [flat|nested] 2+ messages in thread
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2008-02-12 20:56 ` Benjamin Herrenschmidt
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