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| author | Wolfram Sang <w.sang@pengutronix.de> | 2012-04-05 16:15:24 +0200 |
|---|---|---|
| committer | Wolfram Sang <w.sang@pengutronix.de> | 2012-04-25 22:59:44 +0200 |
| commit | c95eeae9e39314273bcda057f27100603d333518 (patch) | |
| tree | 52ab3eee720240c6556d803574d9bee53f47d06f /drivers/i2c | |
| parent | 096407136769ec10690abe1baba092abcb763662 (diff) | |
| download | blackbird-op-linux-c95eeae9e39314273bcda057f27100603d333518.tar.gz blackbird-op-linux-c95eeae9e39314273bcda057f27100603d333518.zip | |
i2c: mxs: handle spurious interrupt
After an error interrupt setting cmd->err, I see another interrupt that
the data engine is empty which clears cmd->err before being processed.
So, clear cmd->err at the beginning of a transfer only to handle these
consecutive interrupts.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-mxs.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-mxs.c b/drivers/i2c/busses/i2c-mxs.c index 3d471d56bf15..4c37347973e6 100644 --- a/drivers/i2c/busses/i2c-mxs.c +++ b/drivers/i2c/busses/i2c-mxs.c @@ -227,6 +227,7 @@ static int mxs_i2c_xfer_msg(struct i2c_adapter *adap, struct i2c_msg *msg, return -EINVAL; init_completion(&i2c->cmd_complete); + i2c->cmd_err = 0; flags = stop ? MXS_I2C_CTRL0_POST_SEND_STOP : 0; @@ -299,8 +300,6 @@ static irqreturn_t mxs_i2c_isr(int this_irq, void *dev_id) MXS_I2C_CTRL1_SLAVE_STOP_IRQ | MXS_I2C_CTRL1_SLAVE_IRQ)) /* MXS_I2C_CTRL1_OVERSIZE_XFER_TERM_IRQ is only for slaves */ i2c->cmd_err = -EIO; - else - i2c->cmd_err = 0; is_last_cmd = (readl(i2c->regs + MXS_I2C_QUEUESTAT) & MXS_I2C_QUEUESTAT_WRITE_QUEUE_CNT_MASK) == 0; |
