[PATCH] i2c-s3c2410: Decrease delay after end of transaction
in [Kernel]
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From: Yauhen Kharuzhy on 20 Apr 2010 07:00 msleep(1) which has been used for delay after issuing a STOP condition to bus cause very big delay (min 1/HZ s). This is makes bulk register update in I2C devices (for instance video camera) very slowly. Seems that this delay can be safely decreased to few tens of microseconds. Signed-off-by: Yauhen Kharuzhy <yauhen.kharuzhy(a)promwad.com> --- drivers/i2c/busses/i2c-s3c2410.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c index d27072b..de20a4e 100644 --- a/drivers/i2c/busses/i2c-s3c2410.c +++ b/drivers/i2c/busses/i2c-s3c2410.c @@ -521,7 +521,7 @@ static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, /* ensure the stop has been through the bus */ - msleep(1); + udelay(50); out: return ret; -- 1.6.6.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |