From: Wolfram Sang <[email protected]> Use standard i2c error codes for i2c failures. Also, don't print something on timeout since it happens regularly with i2c. Simplify some, logic, too.
Signed-off-by: Wolfram Sang <[email protected]> --- drivers/i2c/busses/i2c-sh_mobile.c | 25 +++++++++---------------- 1 file changed, 9 insertions(+), 16 deletions(-) diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c index d91625eea6bb..d2fa222df3d1 100644 --- a/drivers/i2c/busses/i2c-sh_mobile.c +++ b/drivers/i2c/busses/i2c-sh_mobile.c @@ -480,7 +480,7 @@ static int start_ch(struct sh_mobile_i2c_data *pd, struct i2c_msg *usr_msg, { if (usr_msg->len == 0 && (usr_msg->flags & I2C_M_RD)) { dev_err(pd->dev, "Unsupported zero length i2c read\n"); - return -EIO; + return -EOPNOTSUPP; } if (do_init) { @@ -515,17 +515,12 @@ static int poll_dte(struct sh_mobile_i2c_data *pd) break; if (val & ICSR_TACK) - return -EIO; + return -ENXIO; udelay(10); } - if (!i) { - dev_warn(pd->dev, "Timeout polling for DTE!\n"); - return -ETIMEDOUT; - } - - return 0; + return i ? 0 : -ETIMEDOUT; } static int poll_busy(struct sh_mobile_i2c_data *pd) @@ -543,20 +538,18 @@ static int poll_busy(struct sh_mobile_i2c_data *pd) */ if (!(val & ICSR_BUSY)) { /* handle missing acknowledge and arbitration lost */ - if ((val | pd->sr) & (ICSR_TACK | ICSR_AL)) - return -EIO; + val |= pd->sr; + if (val & ICSR_TACK) + return -ENXIO; + if (val & ICSR_AL) + return -EAGAIN; break; } udelay(10); } - if (!i) { - dev_err(pd->dev, "Polling timed out\n"); - return -ETIMEDOUT; - } - - return 0; + return i ? 0 : -ETIMEDOUT; } static int sh_mobile_i2c_xfer(struct i2c_adapter *adapter, -- 1.9.2 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
