diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-designware.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-designware.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/drivers/i2c/busses/i2c-designware.c b/drivers/i2c/busses/i2c-designware.c index cdfd94e41cc..bfb42f0f87a 100644 --- a/drivers/i2c/busses/i2c-designware.c +++ b/drivers/i2c/busses/i2c-designware.c @@ -338,6 +338,8 @@ i2c_dw_xfer_msg(struct dw_i2c_dev *dev) u32 addr = msgs[dev->msg_write_idx].addr; u32 buf_len = dev->tx_buf_len; + intr_mask = DW_IC_INTR_STOP_DET | DW_IC_INTR_TX_ABRT; + if (!(dev->status & STATUS_WRITE_IN_PROGRESS)) { /* Disable the adapter */ writel(0, dev->base + DW_IC_ENABLE); @@ -387,17 +389,19 @@ i2c_dw_xfer_msg(struct dw_i2c_dev *dev) dev->base + DW_IC_DATA_CMD); tx_limit--; buf_len--; } + + dev->tx_buf_len = buf_len; + + if (buf_len > 0) { + /* more bytes to be written */ + intr_mask |= DW_IC_INTR_TX_EMPTY; + dev->status |= STATUS_WRITE_IN_PROGRESS; + break; + } else + dev->status &= ~STATUS_WRITE_IN_PROGRESS; } - intr_mask = DW_IC_INTR_STOP_DET | DW_IC_INTR_TX_ABRT; - if (buf_len > 0) { /* more bytes to be written */ - intr_mask |= DW_IC_INTR_TX_EMPTY; - dev->status |= STATUS_WRITE_IN_PROGRESS; - } else - dev->status &= ~STATUS_WRITE_IN_PROGRESS; writel(intr_mask, dev->base + DW_IC_INTR_MASK); - - dev->tx_buf_len = buf_len; } static void |