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authorZhiwu Song <Zhiwu.Song@csr.com>2013-08-13 17:11:31 +0800
committerWolfram Sang <wsa@the-dreams.de>2013-08-28 11:46:03 +0200
commit617da00cb11b75a17a271147e616296f754f591b (patch)
tree51c4be3af32c849491b5c8dce881f3d4a988d2c0 /drivers/i2c
parent5ebffa6b5e0c43edbdd41e5bc53137547a1378cb (diff)
downloadop-kernel-dev-617da00cb11b75a17a271147e616296f754f591b.zip
op-kernel-dev-617da00cb11b75a17a271147e616296f754f591b.tar.gz
i2c: sirf: retry 3 times as sometimes we get random noack and timeout
let i2c core retry 3 times as sometimes we get random noack and timeout even when we access an existing i2c client. Signed-off-by: Zhiwu Song <Zhiwu.Song@csr.com> Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-sirf.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-sirf.c b/drivers/i2c/busses/i2c-sirf.c
index 30ae378..6784f7f 100644
--- a/drivers/i2c/busses/i2c-sirf.c
+++ b/drivers/i2c/busses/i2c-sirf.c
@@ -229,7 +229,7 @@ static int i2c_sirfsoc_xfer_msg(struct sirfsoc_i2c *siic, struct i2c_msg *msg)
while (readl(siic->base + SIRFSOC_I2C_CTRL) & SIRFSOC_I2C_RESET)
cpu_relax();
}
- return siic->err_status ? -EIO : 0;
+ return siic->err_status ? -EAGAIN : 0;
}
static u32 i2c_sirfsoc_func(struct i2c_adapter *adap)
@@ -333,6 +333,7 @@ static int i2c_sirfsoc_probe(struct platform_device *pdev)
adap->algo = &i2c_sirfsoc_algo;
adap->algo_data = siic;
+ adap->retries = 3;
adap->dev.of_node = pdev->dev.of_node;
adap->dev.parent = &pdev->dev;
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