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Commit 24597bf8 authored by Tomoya MORINAGA's avatar Tomoya MORINAGA Committed by Ben Dooks
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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: default avatarTomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com>
Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
parent cb59f525

drivers/i2c/busses/i2c-eg20t.c

+3 −0
Original line number Diff line number Diff line
@@ -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);