2015-12-07 07:09:12

by Andreas Werner

Subject: [PATCH] spi/spi-fsl-espi.c: Add spi cs polarity support

Add CS polarity flag to be able to set the CS polarity
via the DT property spi-cs-high.

Signed-off-by: Andreas Werner <[email protected]>
---
drivers/spi/spi-fsl-espi.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c
index c27124a..2dc70953 100644
--- a/drivers/spi/spi-fsl-espi.c
+++ b/drivers/spi/spi-fsl-espi.c
@@ -495,7 +495,7 @@ static int fsl_espi_setup(struct spi_device *spi)
&reg_base->csmode[spi->chip_select]);
/* mask out bits we are going to set */
cs->hw_mode &= ~(CSMODE_CP_BEGIN_EDGECLK | CSMODE_CI_INACTIVEHIGH
- | CSMODE_REV);
+ | CSMODE_REV | CSMODE_POL_1);

if (spi->mode & SPI_CPHA)
cs->hw_mode |= CSMODE_CP_BEGIN_EDGECLK;
@@ -503,6 +503,8 @@ static int fsl_espi_setup(struct spi_device *spi)
cs->hw_mode |= CSMODE_CI_INACTIVEHIGH;
if (!(spi->mode & SPI_LSB_FIRST))
cs->hw_mode |= CSMODE_REV;
+ if (!(spi->mode & SPI_CS_HIGH))
+ cs->hw_mode |= CSMODE_POL_1;

/* Handle the loop mode */
loop_mode = mpc8xxx_spi_read_reg(&reg_base->mode);
--
2.6.2