Messages in this thread Patch in this message | | | From | Andrew Bresticker <> | Subject | [PATCH 1/3] spi: img-spfi: Enable controller before starting TX DMA | Date | Tue, 16 Dec 2014 13:05:44 -0800 |
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It is recommended that the SPFI controller be enabled (i.e. setting SPFI_EN in SPFI_CONTROL) before TX DMA begins.
Signed-off-by: Andrew Bresticker <abrestic@chromium.org> --- drivers/spi/spi-img-spfi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/spi/spi-img-spfi.c b/drivers/spi/spi-img-spfi.c index 43781c9..e7e79e6 100644 --- a/drivers/spi/spi-img-spfi.c +++ b/drivers/spi/spi-img-spfi.c @@ -390,14 +390,14 @@ static int img_spfi_start_dma(struct spi_master *master, dma_async_issue_pending(spfi->rx_ch); } + spfi_start(spfi); + if (xfer->tx_buf) { spfi->tx_dma_busy = true; dmaengine_submit(txdesc); dma_async_issue_pending(spfi->tx_ch); } - spfi_start(spfi); - return 1; stop_dma: -- 2.2.0.rc0.207.ga3a616c
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