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Commit ce00bab3 authored by Varadarajan Narayanan's avatar Varadarajan Narayanan Committed by Mark Brown
Browse files

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



Signed-off-by: default avatarAndy Gross <andy.gross@linaro.org>
Signed-off-by: default avatarVaradarajan Narayanan <varada@codeaurora.org>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 5f13fd60

drivers/spi/spi-qup.c

+15 −0
Original line number Diff line number Diff line
@@ -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;