[COMMON] i2c: s3c: Add debugging log for Normal i2c

Previously we only print "bus idle" log when the bus is busy.
This patch we put I2C STAT SFR info for more convinient debugging.

Change-Id: I9b18366f7bdcdacfec0e7d0ae4b7cc4e26851e73
Signed-off-by: Kyungwoo Kang <kwoo.kang@samsung.com>

diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
index 9c8274c86981eff092f3b88bc685da483688673b..bba0e569aa4da0150705b34700ce24b732ad25ca 100644 (file)
--- a/drivers/i2c/busses/i2c-s3c2410.c
+++ b/drivers/i2c/busses/i2c-s3c2410.c
@@ -759,7 +759,10 @@ static void s3c24xx_i2c_wait_idle(struct s3c24xx_i2c *i2c)
        }
 
        if (iicstat & S3C2410_IICSTAT_START) {
-               dev_warn(i2c->dev, "timeout waiting for bus idle\n");
+               dev_warn(i2c->dev, "timeout waiting for bus idle\n"
+                               "I2C Stat Reg dump:\n"
+                               "IIC STAT = 0x%08x\n"
+                               , readl(i2c->regs + S3C2410_IICSTAT));
                if (i2c->state != STATE_STOP)
                        s3c24xx_i2c_stop(i2c, -ENXIO);
        }