leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

i2c-s3c2410: fix calculation of SDA line delay

Browse Source 
S3C2440 style I2C controller uses PCLK to calculate the SDA line delay.
The driver wrongly assumed that this delay is calculated from the
frequency that the controller is operating on. This patch fixes this
issue.

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
MyungJoo Ham 2010-09-30 15:54:46 +02:00 committed by Ben Dooks
parent 4bba0fd8d1
commit 7031307aef
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/i2c/busses/i2c-s3c2410.c
View File

@ -662,8 +662,8 @@ static int s3c24xx_i2c_clockrate(struct s3c24xx_i2c *i2c, unsigned int *got)
unsigned long sda_delay;
if (pdata->sda_delay) {
sda_delay = (freq / 1000) * pdata->sda_delay;
sda_delay /= 1000000;
sda_delay = clkin * pdata->sda_delay;
sda_delay = DIV_ROUND_UP(sda_delay, 1000000);
sda_delay = DIV_ROUND_UP(sda_delay, 5);
if (sda_delay > 3)
sda_delay = 3;