From 24597bf8012cf3fa5703c38e1bb13df3118d7588 Mon Sep 17 00:00:00 2001 From: Tomoya MORINAGA Date: Wed, 12 Oct 2011 13:13:06 +0900 Subject: 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 Signed-off-by: Ben Dooks --- drivers/i2c/busses/i2c-eg20t.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/i2c') 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); -- cgit v1.2.3