From: Sonic Zhang <[email protected]> Once the last byte has been received, we can then move on to further processing of the transfer rather than delaying. This improves the response times with long transfers.
Signed-off-by: Sonic Zhang <[email protected]> Signed-off-by: Mike Frysinger <[email protected]> --- drivers/i2c/busses/i2c-bfin-twi.c | 41 ++++++++++++++++++++---------------- 1 files changed, 23 insertions(+), 18 deletions(-) diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c index 5ed6c2f..aaabd5d 100644 --- a/drivers/i2c/busses/i2c-bfin-twi.c +++ b/drivers/i2c/busses/i2c-bfin-twi.c @@ -130,21 +130,25 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface, } iface->transPtr++; iface->readNum--; - } else if (iface->manual_stop) { - /* Avoid possible bus stall - - * Flush FIFO before issuing the STOP condition - */ - read_RCV_DATA16(iface); - write_MASTER_CTL(iface, - read_MASTER_CTL(iface) | STOP); - } else if (iface->cur_mode == TWI_I2C_MODE_REPEAT && - iface->cur_msg + 1 < iface->msg_num) { - if (iface->pmsg[iface->cur_msg + 1].flags & I2C_M_RD) - write_MASTER_CTL(iface, - read_MASTER_CTL(iface) | RSTART | MDIR); - else + } + + if (iface->readNum == 0) { + if (iface->manual_stop) { + /* Avoid possible bus stall - + * Flush FIFO before issuing the STOP condition + */ + read_RCV_DATA16(iface); write_MASTER_CTL(iface, - (read_MASTER_CTL(iface) | RSTART) & ~MDIR); + read_MASTER_CTL(iface) | STOP); + } else if (iface->cur_mode == TWI_I2C_MODE_REPEAT && + iface->cur_msg + 1 < iface->msg_num) { + if (iface->pmsg[iface->cur_msg + 1].flags & I2C_M_RD) + write_MASTER_CTL(iface, + read_MASTER_CTL(iface) | RSTART | MDIR); + else + write_MASTER_CTL(iface, + (read_MASTER_CTL(iface) | RSTART) & ~MDIR); + } } } if (twi_int_status & MERR) { @@ -239,12 +243,13 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface, } } - if (iface->pmsg[iface->cur_msg].len <= 255) - write_MASTER_CTL(iface, + if (iface->pmsg[iface->cur_msg].len <= 255) { + write_MASTER_CTL(iface, (read_MASTER_CTL(iface) & (~(0xff << 6))) | - (iface->pmsg[iface->cur_msg].len << 6)); - else { + (iface->pmsg[iface->cur_msg].len << 6)); + iface->manual_stop = 0; + } else { write_MASTER_CTL(iface, (read_MASTER_CTL(iface) | (0xff << 6))); -- 1.7.5.rc3 -- 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
