From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Fri, 9 Dec 2011 12:55:03 +0000 (+0800)
Subject: i2c: i2c-s3c2410: Add a cpu_relax() to busy wait for bus idle
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=37de03ea1246c8280f6c8c6f61ea98973e9b9448;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

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>
---

diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
index 2754cef86a06..37b2de106808 100644
--- a/drivers/i2c/busses/i2c-s3c2410.c
+++ b/drivers/i2c/busses/i2c-s3c2410.c
@@ -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);