spi: rspi: Do not call rspi_receive_init() for TX-only

Since commit 8449fd76deb9ac67a15a6fb8ead7bb4595d019d2 ("spi: rspi: Merge
rspi_send_pio() and rspi_receive_pio()"), rspi_receive_init() is called
for transmit-only transfers too, while this is not needed.
Only call rspi_receive_init() when receiving, to preserve behavior on
RSPI on SH.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c
index d04a4ac..57beda2 100644 (file)
--- a/drivers/spi/spi-rspi.c
+++ b/drivers/spi/spi-rspi.c
@@ -726,13 +726,13 @@ static int rspi_transfer_out_in(struct rspi_data *rspi,
        u8 *rx_buf = xfer->rx_buf;
        u8 spcr, data;
 
-       rspi_receive_init(rspi);
-
        spcr = rspi_read8(rspi, RSPI_SPCR);
-       if (rx_buf)
+       if (rx_buf) {
+               rspi_receive_init(rspi);
                spcr &= ~SPCR_TXMD;
-       else
+       } else {
                spcr |= SPCR_TXMD;
+       }
        rspi_write8(rspi, spcr, RSPI_SPCR);
 
        while (remain > 0) {