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>
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 @@
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 @@
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;