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i2c: i2c-s3c2410: Add a cpu_relax() to busy wait for bus idle 

Be a bit more friendly.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Mark Brown 2011-12-09 20:55:03 +08:00 committed by Ben Dooks
parent a36bfddd65
commit 37de03ea12
1 changed files with 1 additions and 0 deletions
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drivers/i2c/busses/i2c-s3c2410.c
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@ -534,6 +534,7 @@ static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c,
/* first, try busy waiting briefly */
do {
cpu_relax();
iicstat = readl(i2c->regs + S3C2410_IICSTAT);
} while ((iicstat & S3C2410_IICSTAT_START) && --spins);