Messages in this thread Patch in this message | | | From | Varadarajan Narayanan <> | Subject | [PATCH v3 05/15] spi: qup: Place the QUP in run mode before DMA | Date | Tue, 20 Jun 2017 14:40:47 +0530 |
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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 d3ccf53..0683e47 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -336,6 +336,14 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer, struct spi_qup *qup = spi_master_get_devdata(master); int ret; + /* 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, spi_qup_dma_done, &qup->rxc); @@ -383,6 +391,13 @@ 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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