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

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

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>

authored by

Geert Uytterhoeven and committed by

Mark Brown 10 months ago 8f836868 acb47aa9

1 changed file

expand all

drivers

spi

spi-sh-msiof.c

drivers/spi/spi-sh-msiof.c

··· 86 86 /* SITMDR1 and SIRMDR1 */ 87 87 #define SIMDR1_TRMD BIT(31) /* Transfer Mode (1 = Master mode) */ 88 88 #define SIMDR1_SYNCMD GENMASK(29, 28) /* SYNC Mode */ 89 + #define SIMDR1_SYNCMD_PULSE 0U /* Frame start sync pulse */ 89 90 #define SIMDR1_SYNCMD_SPI 2U /* Level mode/SPI */ 90 91 #define SIMDR1_SYNCMD_LR 3U /* L/R mode */ 91 92 #define SIMDR1_SYNCAC BIT(25) /* Sync Polarity (1 = Active-low) */