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| author | Tomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com> | 2011-10-12 13:13:06 +0900 |
|---|---|---|
| committer | Ben Dooks <ben-linux@fluff.org> | 2011-10-29 11:09:33 +0100 |
| commit | 24597bf8012cf3fa5703c38e1bb13df3118d7588 (patch) | |
| tree | a32c2760af44828759d3712123f4a3b1405c8275 /drivers/i2c | |
| parent | cb59f5253a5313d62e8e345fcd5dd5a44a73e0d6 (diff) | |
| download | linux-3.10-24597bf8012cf3fa5703c38e1bb13df3118d7588.tar.gz linux-3.10-24597bf8012cf3fa5703c38e1bb13df3118d7588.tar.bz2 linux-3.10-24597bf8012cf3fa5703c38e1bb13df3118d7588.zip | |
i2c-eg20t: Add initialize processing in case i2c-error occurs
In case disconnecting physical connection,
need to initialize i2c device for retry access.
This patch adds initialize process in case bus-idle fails and Lost arbitration.
Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-eg20t.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-eg20t.c b/drivers/i2c/busses/i2c-eg20t.c index a1bf62dbd27..8cebef49aea 100644 --- a/drivers/i2c/busses/i2c-eg20t.c +++ b/drivers/i2c/busses/i2c-eg20t.c @@ -289,6 +289,7 @@ static s32 pch_i2c_wait_for_bus_idle(struct i2c_algo_pch_data *adap, pch_dbg(adap, "I2CSR = %x\n", ioread32(p + PCH_I2CSR)); pch_err(adap, "%s: Timeout Error.return%d\n", __func__, -ETIME); + pch_i2c_init(adap); return -ETIME; } @@ -456,6 +457,7 @@ static s32 pch_i2c_writebytes(struct i2c_adapter *i2c_adap, pch_err(adap, "Lost Arbitration\n"); pch_clrbit(adap->pch_base_address, PCH_I2CSR, I2CMAL_BIT); pch_clrbit(adap->pch_base_address, PCH_I2CSR, I2CMIF_BIT); + pch_i2c_init(adap); return -EAGAIN; } else { /* wait-event timeout */ pch_i2c_stop(adap); @@ -634,6 +636,7 @@ static s32 pch_i2c_readbytes(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, pch_err(adap, "Lost Arbitration\n"); pch_clrbit(adap->pch_base_address, PCH_I2CSR, I2CMAL_BIT); pch_clrbit(adap->pch_base_address, PCH_I2CSR, I2CMIF_BIT); + pch_i2c_init(adap); return -EAGAIN; } else { /* wait-event timeout */ pch_i2c_stop(adap); |