From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Shevchenko Subject: [PATCH v1 1/1] spi: dw-mid: set DMA burst on memory side Date: Mon, 11 Apr 2016 19:30:12 +0300 Message-ID: <1460392212-101116-1-git-send-email-andriy.shevchenko@linux.intel.com> Cc: Andy Shevchenko To: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Mark Brown Return-path: Sender: linux-spi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: To optimize amount of bus writes on memory side set burst to be the same amount of data on both sides. Signed-off-by: Andy Shevchenko --- drivers/spi/spi-dw-mid.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c index e31971f9..0e0c34e 100644 --- a/drivers/spi/spi-dw-mid.c +++ b/drivers/spi/spi-dw-mid.c @@ -157,6 +157,7 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_tx(struct dw_spi *dws, txconf.direction = DMA_MEM_TO_DEV; txconf.dst_addr = dws->dma_addr; + txconf.src_maxburst = 4 * dws->dma_width; txconf.dst_maxburst = 16; txconf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; txconf.dst_addr_width = convert_dma_width(dws->dma_width); @@ -203,6 +204,7 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_rx(struct dw_spi *dws, rxconf.direction = DMA_DEV_TO_MEM; rxconf.src_addr = dws->dma_addr; + rxconf.dst_maxburst = 4 * dws->dma_width; rxconf.src_maxburst = 16; rxconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; rxconf.src_addr_width = convert_dma_width(dws->dma_width); -- 2.8.0.rc3 -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html