Hello.
On 01/26/2014 07:05 PM, Ben Dooks wrote:
The i2c-rcar driver currently prints an error message if the master_xfer
callback fails. However if the bus is being probed then lots of NAKs
will be generated, causing the output of a number of errors printed.
To solve this, disable the print if the error is not -EREMOTEIO.
An example of running i2cdetect:
10: i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
-- 12 i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
-- i2c-rcar e6530000.i2c: error -121 : 15
Cc: Simon Horman <[email protected]>
Cc: Wolfram Sang <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Ben Dooks <[email protected]>
---
drivers/i2c/busses/i2c-rcar.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c
index 2c2fd7c..0d25104 100644
--- a/drivers/i2c/busses/i2c-rcar.c
+++ b/drivers/i2c/busses/i2c-rcar.c
@@ -623,7 +623,7 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap,
pm_runtime_put(dev);
- if (ret < 0)
+ if (ret < 0 && ret != -EREMOTEIO)
dev_err(dev, "error %d : %x\n", ret, priv->flags);
Hm, I'm now getting -EBUSY and -EAGAIN running i2cdetect on R8A7791 base
Henninger board. Only when I comment out the above 2 lines, I can get the bus
scanned, otherwise I don't see any devices at all.
WBR, Sergei
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