From: kfx <kfx@rock-chips.com>
Date: Tue, 22 Mar 2011 03:09:38 +0000 (+0800)
Subject: update i2c drivers about 'set scl_rate'
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=401817083f1f9b610e7a2f6d659414282323959b;p=firefly-linux-kernel-4.4.55.git

update i2c drivers about 'set scl_rate'
---

diff --git a/drivers/i2c/busses/i2c-rk29.c b/drivers/i2c/busses/i2c-rk29.c
index 1d0be8d550dd..efc129f0e0fa 100755
--- a/drivers/i2c/busses/i2c-rk29.c
+++ b/drivers/i2c/busses/i2c-rk29.c
@@ -184,6 +184,7 @@ static void  rk29_i2c_clockrate(struct rk29_i2c_data *i2c)
 	rk29_i2c_calcdivisor(i2c->i2c_rate, scl_rate, &real_rate, &rem, &exp);
 
 	tmp = readl(i2c->regs + I2C_OPR);
+	tmp &= ~0x3f;
 	tmp |= exp;
 	tmp |= rem<<I2CCDVR_EXP_BITS;	
 	writel(tmp, i2c->regs + I2C_OPR);