From: 柯飞雄 <kfx@rock-chips.com>
Date: Wed, 12 May 2010 02:19:45 +0000 (+0000)
Subject: mod i2c
X-Git-Tag: firefly_0821_release~11565
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=08e5c91a299ae84b3397e0b50d0da57eaa92dd53;p=firefly-linux-kernel-4.4.55.git

mod i2c
---

diff --git a/drivers/i2c/busses/i2c-rk2818.c b/drivers/i2c/busses/i2c-rk2818.c
index 32f28c449bf2..6abc52fce7c7 100755
--- a/drivers/i2c/busses/i2c-rk2818.c
+++ b/drivers/i2c/busses/i2c-rk2818.c
@@ -246,13 +246,15 @@ static int rk2818_wait_while_busy(struct rk2818_i2c_data *i2c)
 {
 	unsigned long timeout = jiffies + RK2818_I2C_TIMEOUT;
 	unsigned long lsr;
+	unsigned int time = 10;
 	dev_dbg(i2c->dev,"wait_while_busy");
 	while(!time_after(jiffies, timeout))
 	{
 		lsr = readl(i2c->regs + I2C_LSR);
 		if(!(lsr & I2C_LSR_BUSY))
 			return 0;
-		udelay(100);
+		udelay(time);
+		time *= 2;
 	}
 	return -ETIMEDOUT;
 }