From ce00bab3187f9fc1afac07914959bff0c52547c2 Mon Sep 17 00:00:00 2001 From: Varadarajan Narayanan Date: Fri, 28 Jul 2017 12:22:51 +0530 Subject: spi: qup: Place the QUP in run mode before DMA Signed-off-by: Andy Gross Signed-off-by: Varadarajan Narayanan Signed-off-by: Mark Brown --- drivers/spi/spi-qup.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'drivers/spi') diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index fdd34c3ce426..f1aa5c15d180 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -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; -- cgit v1.2.3