From: Rodolfo Giometti <giometti-k2GhghHVRtY@public.gmane.org>
To: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org>,
Rodolfo Giometti <giometti-k2GhghHVRtY@public.gmane.org>
Subject: [PATCH 1/1] i2c pxa: try to reset controller if the bus is busy for too long.
Date: Wed, 18 Feb 2009 15:11:07 +0100 [thread overview]
Message-ID: <1234966267-12458-1-git-send-email-giometti@linux.it> (raw)
Signed-off-by: Rodolfo Giometti <giometti-k2GhghHVRtY@public.gmane.org>
---
drivers/i2c/busses/i2c-pxa.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index e29bde1..7dbe4dd 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -669,14 +669,22 @@ out:
static int i2c_pxa_do_xfer(struct pxa_i2c *i2c, struct i2c_msg *msg, int num)
{
long timeout;
+ int try_reset = 1;
int ret;
/*
* Wait for the bus to become free.
*/
+retry:
ret = i2c_pxa_wait_bus_not_busy(i2c);
if (ret) {
dev_err(&i2c->adap.dev, "i2c_pxa: timeout waiting for bus free\n");
+ if (try_reset--) {
+ dev_info(&i2c->adap.dev, "i2c_pxa: controller reset\n");
+ i2c_pxa_reset(i2c);
+ goto retry;
+ }
+
goto out;
}
--
1.5.6.3
reply other threads:[~2009-02-18 14:11 UTC|newest]
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