spi: sh-msiof: Document frame start sync pulse mode

Unused, but nice to have it documented.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/3d3acaab4a4125106a0655d28c09c050341c5eeb.1747401908.git.geert+renesas@glider.be
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index 4d9a44118e1c9d6c394ffb208c05ecc328fb671c..5d9d551dbd220389a7701e2cac0ee8bbfa80a0c7 100644 (file)
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -86,6 +86,7 @@ struct sh_msiof_spi_priv {
 /* SITMDR1 and SIRMDR1 */
 #define SIMDR1_TRMD            BIT(31)         /* Transfer Mode (1 = Master mode) */
 #define SIMDR1_SYNCMD          GENMASK(29, 28) /* SYNC Mode */
+#define SIMDR1_SYNCMD_PULSE    0U              /*   Frame start sync pulse */
 #define SIMDR1_SYNCMD_SPI      2U              /*   Level mode/SPI */
 #define SIMDR1_SYNCMD_LR       3U              /*   L/R mode */
 #define SIMDR1_SYNCAC          BIT(25)         /* Sync Polarity (1 = Active-low) */