[PATCH v5 04/14] spi: qup: Place the QUP in run mode before DMA

[Varadarajan Narayanan]

Signed-off-by: Andy Gross <andy.gr...@linaro.org>
Signed-off-by: Varadarajan Narayanan <var...@codeaurora.org>
---
 drivers/spi/spi-qup.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 92922b6..e6294f8 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -342,6 +342,14 @@ 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)
@@ -387,6 +395,13 @@ 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;
 
-- 
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