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spi: qup: Place the QUP in run mode before DMA

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Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Varadarajan Narayanan 2017-07-28 12:22:51 +05:30 committed by Mark Brown
parent 5f13fd60b1
commit ce00bab318
1 changed files with 15 additions and 0 deletions
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15
drivers/spi/spi-qup.c
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@ -343,6 +343,14 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
else if (xfer->tx_buf)
tx_done = spi_qup_dma_done;
/* before issuing the descriptors, set the QUP to run */
ret = spi_qup_set_state(qup, QUP_STATE_RUN);
if (ret) {
dev_warn(qup->dev, "%s(%d): cannot set RUN state\n",
__func__, __LINE__);
return ret;
}
if (xfer->rx_buf) {
ret = spi_qup_prep_sg(master, xfer, DMA_DEV_TO_MEM, rx_done);
if (ret)
@ -385,6 +393,13 @@ static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer,
spi_qup_fifo_write(qup, xfer);
ret = spi_qup_set_state(qup, QUP_STATE_RUN);
if (ret) {
dev_warn(qup->dev, "%s(%d): cannot set RUN state\n",
__func__, __LINE__);
return ret;
}
if (!wait_for_completion_timeout(&qup->done, timeout))
return -ETIMEDOUT;