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    Subject[PATCH 6/7 v2] i2c-eg20t: Add initialize processing in case i2c-error occurs
    Date
    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>
    ---
    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 66de0a9..cf64e21 100644
    --- a/drivers/i2c/busses/i2c-eg20t.c
    +++ b/drivers/i2c/busses/i2c-eg20t.c
    @@ -286,6 +286,7 @@ static s32 pch_i2c_wait_for_bus_idle(struct i2c_algo_pch_data *adap,

    if (timeout == 0) {
    pch_err(adap, "%s: Timeout Error.return%d\n", __func__, -ETIME);
    + pch_i2c_init(adap);
    return -ETIME;
    }

    @@ -430,6 +431,7 @@ 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);
    @@ -546,6 +548,7 @@ 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);
    --
    1.7.6.4


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