spi: rspi: Fix sequencer reset during initialization

While the sequencer is reset after each SPI message since commit
880c6d114fd79a69 ("spi: rspi: Add support for Quad and Dual SPI
Transfers on QSPI"), it was never reset for the first message, thus
relying on reset state or bootloader settings.

Fix this by initializing it explicitly during configuration.

Fixes: 0b2182ddac4b8837 ("spi: add support for Renesas RSPI")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c
index b30fed824e6643a289bbcbefa40624f8e89c7c0e..3be8fbe80b084ac0994ea1a0bd86cf14dba714b1 100644 (file)
--- a/drivers/spi/spi-rspi.c
+++ b/drivers/spi/spi-rspi.c
@@ -271,7 +271,8 @@ static int rspi_set_config_register(struct rspi_data *rspi, int access_size)
        /* Sets parity, interrupt mask */
        rspi_write8(rspi, 0x00, RSPI_SPCR2);
 
-       /* Sets SPCMD */
+       /* Resets sequencer */
+       rspi_write8(rspi, 0, RSPI_SPSCR);
        rspi->spcmd |= SPCMD_SPB_8_TO_16(access_size);
        rspi_write16(rspi, rspi->spcmd, RSPI_SPCMD0);
 
@@ -315,7 +316,8 @@ static int rspi_rz_set_config_register(struct rspi_data *rspi, int access_size)
        rspi_write8(rspi, 0x00, RSPI_SSLND);
        rspi_write8(rspi, 0x00, RSPI_SPND);
 
-       /* Sets SPCMD */
+       /* Resets sequencer */
+       rspi_write8(rspi, 0, RSPI_SPSCR);
        rspi->spcmd |= SPCMD_SPB_8_TO_16(access_size);
        rspi_write16(rspi, rspi->spcmd, RSPI_SPCMD0);
 
@@ -366,7 +368,8 @@ static int qspi_set_config_register(struct rspi_data *rspi, int access_size)
        /* Sets buffer to allow normal operation */
        rspi_write8(rspi, 0x00, QSPI_SPBFCR);
 
-       /* Sets SPCMD */
+       /* Resets sequencer */
+       rspi_write8(rspi, 0, RSPI_SPSCR);
        rspi_write16(rspi, rspi->spcmd, RSPI_SPCMD0);
 
        /* Sets RSPI mode */