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[PATCH v5 04/14] 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>
---
 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;
 
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

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Thread

[PATCH v5 00/14] spi: qup: Fixes and add support for >64k transfers Varadarajan Narayanan <varada@codeaurora.org> - 2017-07-24 09:50 +0200
  [PATCH v5 08/14] spi: qup: refactor spi_qup_io_config into two functions Varadarajan Narayanan <varada@codeaurora.org> - 2017-07-24 09:50 +0200
  [PATCH v5 04/14] spi: qup: Place the QUP in run mode before DMA Varadarajan Narayanan <varada@codeaurora.org> - 2017-07-24 10:00 +0200
  [PATCH v5 11/14] spi: qup: refactor spi_qup_prep_sg Varadarajan Narayanan <varada@codeaurora.org> - 2017-07-24 10:00 +0200
  [PATCH v5 06/14] spi: qup: Fix transaction done signaling Varadarajan Narayanan <varada@codeaurora.org> - 2017-07-24 10:00 +0200
  [PATCH v5 12/14] spi: qup: allow multiple DMA transactions per spi xfer Varadarajan Narayanan <varada@codeaurora.org> - 2017-07-24 10:00 +0200
  [PATCH v5 14/14] spi: qup: Fix QUP version identify method Varadarajan Narayanan <varada@codeaurora.org> - 2017-07-24 10:00 +0200
  [PATCH v5 13/14] spi: qup: Ensure done detection Varadarajan Narayanan <varada@codeaurora.org> - 2017-07-24 10:00 +0200
  [PATCH v5 07/14] spi: qup: Do block sized read/write in block mode Varadarajan Narayanan <varada@codeaurora.org> - 2017-07-24 10:00 +0200

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