spi: rspi: Add configuration for LSB/MSB
diff mbox series

Message ID 1554282541-8952-1-git-send-email-na-hoan@jinso.co.jp
State Under Review
Delegated to: Geert Uytterhoeven
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Series
  • spi: rspi: Add configuration for LSB/MSB
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Commit Message

グェン・アン・ホァン April 3, 2019, 9:09 a.m. UTC 
From: Hoan Nguyen An <na-hoan@jinso.co.jp>

SPI controllers can support LSB or MSB depending on
the structure of the message that Slave requires,
Add support.

Signed-off-by: Hoan Nguyen An <na-hoan@jinso.co.jp>
---
 drivers/spi/spi-rspi.c | 2 ++
 1 file changed, 2 insertions(+)

Patch
diff mbox series 

diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c
index 3be8fbe..7ae5f09 100644
--- a/drivers/spi/spi-rspi.c
+++ b/drivers/spi/spi-rspi.c
@@ -950,6 +950,8 @@  static int rspi_prepare_message(struct spi_controller *ctlr,
 		rspi->spcmd |= SPCMD_CPOL;
 	if (spi->mode & SPI_CPHA)
 		rspi->spcmd |= SPCMD_CPHA;
+	if (spi->mode & SPI_LSB_FIRST)
+		rspi->spcmd |= SPCMD_LSBF;
 
 	/* CMOS output mode and MOSI signal from previous transfer */
 	rspi->sppcr = 0;