From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomoya MORINAGA Subject: [PATCH 7/7] i2c-eg20t: Add initialize processing in case i2c-error occurs Date: Wed, 21 Sep 2011 16:51:49 +0900 Message-ID: <1316591509-4433-7-git-send-email-tomoya-linux@dsn.okisemi.com> References: <1316591509-4433-1-git-send-email-tomoya-linux@dsn.okisemi.com> Return-path: In-Reply-To: <1316591509-4433-1-git-send-email-tomoya-linux-ECg8zkTtlr0C6LszWs/t0g@public.gmane.org> Sender: linux-i2c-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Jean Delvare , Ben Dooks , linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: Qi Wang , yong.y.wang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, joel.clark-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, kok.howg.ewe-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, toshiharu-linux-ECg8zkTtlr0C6LszWs/t0g@public.gmane.org, Tomoya MORINAGA List-Id: linux-i2c@vger.kernel.org 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 --- 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 6d6baf0..b594378 100644 --- a/drivers/i2c/busses/i2c-eg20t.c +++ b/drivers/i2c/busses/i2c-eg20t.c @@ -288,6 +288,7 @@ static s32 pch_i2c_wait_for_bus_idle(struct i2c_algo_pch_data *adap, if (!ktime_lt(ktime_get(), ns_val)) { pch_err(adap, "%s: Timeout Error.return%d\n", __func__, -ETIME); + pch_i2c_init(adap); return -ETIME; } @@ -432,6 +433,7 @@ 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); @@ -548,6 +550,7 @@ 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); -- 1.7.4.4