Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-24 13:11:40 +00:00
Code Issues Packages Projects Releases Wiki Activity

i2c-eg20t: Add initialize processing in case i2c-error occurs

Browse Source 
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>
This commit is contained in:
Tomoya MORINAGA 2011-10-12 13:13:06 +09:00 committed by Ben Dooks
parent cb59f5253a
commit 24597bf801
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/i2c/busses/i2c-eg20t.c
View File

@ -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);