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i2c: designware: retry transfer on transient failure 

Set the i2c_adapter retries field to a sensible value. This allows the i2c core
to retry master_xfer() when it returns -EAGAIN. Currently the i2c-designware
driver returns -EAGAIN only on Tx arbitration failure (DW_IC_TX_ARB_LOST).

Reported-by: Rolland Chau <zourongrong@gmail.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Baruch Siach 2015-12-23 18:43:24 +02:00 committed by Wolfram Sang
parent f199b2605c
commit 8d22f30938
1 changed files with 1 additions and 0 deletions
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1
drivers/i2c/busses/i2c-designware-core.c
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@ -854,6 +854,7 @@ int i2c_dw_probe(struct dw_i2c_dev *dev)
snprintf(adap->name, sizeof(adap->name),
"Synopsys DesignWare I2C adapter");
adap->retries = 3;
adap->algo = &i2c_dw_algo;
adap->dev.parent = dev->dev;
i2c_set_adapdata(adap, dev);