spi: rspi: Add DMA support for RSPI on RZ/A1H

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>

diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c
index bec8147..4bc4138 100644 (file)
--- 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;