From: Serge Semin <Sergey.Semin@baikalelectronics.ru> To: Mark Brown <broonie@kernel.org> Cc: Serge Semin <Sergey.Semin@baikalelectronics.ru>, Serge Semin <fancer.lancer@gmail.com>, Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>, Georgy Vlasov <Georgy.Vlasov@baikalelectronics.ru>, Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru>, Pavel Parkhomenko <Pavel.Parkhomenko@baikalelectronics.ru>, Peter Ujfalusi <peter.ujfalusi@ti.com>, Andy Shevchenko <andy.shevchenko@gmail.com>, Andy Shevchenko <andriy.shevchenko@linux.intel.com>, Feng Tang <feng.tang@intel.com>, Vinod Koul <vkoul@kernel.org>, <linux-spi@vger.kernel.org>, <linux-kernel@vger.kernel.org> Subject: [PATCH 5/8] spi: dw-dma: Detach DMA transfer into a dedicated method Date: Fri, 31 Jul 2020 10:59:50 +0300 Message-ID: <20200731075953.14416-6-Sergey.Semin@baikalelectronics.ru> (raw) In-Reply-To: <20200731075953.14416-1-Sergey.Semin@baikalelectronics.ru> In order to add an alternative method of DMA-based SPI transfer first we need to detach the currently available one from the common code. Here we move the normal DMA-based SPI transfer execution functionality into a dedicated method. It will be utilized if either the DMA engine supports an unlimited number SG entries or Tx-only SPI transfer is requested. But currently just use it for any SPI transfer. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> --- drivers/spi/spi-dw-dma.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-dw-dma.c b/drivers/spi/spi-dw-dma.c index 366978086781..32ef7913a73d 100644 --- a/drivers/spi/spi-dw-dma.c +++ b/drivers/spi/spi-dw-dma.c @@ -434,7 +434,8 @@ static int dw_spi_dma_setup(struct dw_spi *dws, struct spi_transfer *xfer) return 0; } -static int dw_spi_dma_transfer(struct dw_spi *dws, struct spi_transfer *xfer) +static int dw_spi_dma_transfer_all(struct dw_spi *dws, + struct spi_transfer *xfer) { int ret; @@ -455,7 +456,14 @@ static int dw_spi_dma_transfer(struct dw_spi *dws, struct spi_transfer *xfer) dma_async_issue_pending(dws->txchan); - ret = dw_spi_dma_wait(dws, xfer); + return dw_spi_dma_wait(dws, xfer); +} + +static int dw_spi_dma_transfer(struct dw_spi *dws, struct spi_transfer *xfer) +{ + int ret; + + ret = dw_spi_dma_transfer_all(dws, xfer); if (ret) return ret; -- 2.27.0
next prev parent reply index Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-31 7:59 [PATCH 0/8] spi: dw-dma: Add max SG entries burst capability support Serge Semin 2020-07-31 7:59 ` [PATCH 1/8] spi: dw-dma: Set DMA Level registers on init Serge Semin 2020-07-31 7:59 ` [PATCH 2/8] spi: dw-dma: Fail DMA-based transfer if no Tx-buffer specified Serge Semin 2020-07-31 7:59 ` [PATCH 3/8] spi: dw-dma: Configure the DMA channels in dma_setup Serge Semin 2020-07-31 9:16 ` Andy Shevchenko 2020-07-31 12:32 ` Serge Semin 2020-07-31 7:59 ` [PATCH 4/8] spi: dw-dma: Move DMA transfers submission to the channels prep methods Serge Semin 2020-07-31 9:15 ` Andy Shevchenko 2020-07-31 12:46 ` Serge Semin 2020-07-31 7:59 ` Serge Semin [this message] 2020-07-31 7:59 ` [PATCH 6/8] spi: dw-dma: Move DMAC register cleanup to DMA transfer method Serge Semin 2020-07-31 7:59 ` [PATCH 7/8] spi: dw-dma: Pass exact data to the DMA submit and wait methods Serge Semin 2020-07-31 7:59 ` [PATCH 8/8] spi: dw-dma: Add one-by-one SG list entries transfer Serge Semin 2020-07-31 9:26 ` [PATCH 0/8] spi: dw-dma: Add max SG entries burst capability support Andy Shevchenko 2020-07-31 12:59 ` Serge Semin 2020-08-04 21:14 ` Mark Brown 2020-08-05 11:31 ` Vinod Koul
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