diff mbox

[LTSI-3.14,290/894] spi: rspi: Add DMA support for RSPI on RZ/A1H

Message ID 1409209620-24487-291-git-send-email-horms+renesas@verge.net.au (mailing list archive)
State New, archived
Headers show

Commit Message

Simon Horman Aug. 28, 2014, 6:56 a.m. UTC 
From: Geert Uytterhoeven <geert+renesas@glider.be>

Enable DMA support for RSPI on r7s72100 (RZ/A1H).

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
(cherry picked from commit e7fb921d9f62df05240ad1a74b5a0f623e503c9c)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
---
 drivers/spi/spi-rspi.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox

Patch

diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c
index bec8147..4bc4138 100644
--- a/drivers/spi/spi-rspi.c
+++ b/drivers/spi/spi-rspi.c
@@ -625,6 +625,9 @@  static int rspi_rz_transfer_one(struct spi_master *master,
 
 	rspi_rz_receive_init(rspi);
 
+	if (master->can_dma && __rspi_can_dma(rspi, xfer))
+		return rspi_dma_transfer(rspi, &xfer->tx_sg, &xfer->rx_sg);
+
 	ret = rspi_pio_transfer(rspi, xfer->tx_buf, xfer->rx_buf, xfer->len);
 	if (ret < 0)
 		return ret;