From: Mathias Nyman <mathias.nyman@nokia.com>
Date: Thu, 26 Aug 2010 07:36:44 +0000 (+0000)
Subject: i2c-omap: Make sure i2c bus is free before setting it to idle
X-Git-Tag: upstream/snapshot3+hdmi~12853^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5c64eb26ed5c5550fbabd345e573af3fc6a7f775;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

i2c-omap: Make sure i2c bus is free before setting it to idle

If the i2c bus receives an interrupt with both BB (bus busy) and
ARDY (register access ready) statuses set during the tranfer of the last message
the bus was put to idle while still busy.

This caused bus to timeout.

Signed-off-by: Mathias Nyman <mathias.nyman@nokia.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
---

diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 7674efb..b33c785 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -680,6 +680,8 @@ omap_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
 
 	if (r == 0)
 		r = num;
+
+	omap_i2c_wait_for_bb(dev);
 out:
 	omap_i2c_idle(dev);
 	return r;