From: Knut Wohlrab knut.wohl...@de.bosch.com
There are SPI devices which need a SPI clock with active low polarity and
high inactive state.
Add the setting of the inactive state ECSPIx_CONFIGREG:SCLK CTL
according to the clock polarity ECSPIx_CONFIGREG:SCLK POL:
DT without spi-cpol = 0 = clock active high polarity = inactive state low
DT withspi-cpol = 1 = clock active low polarity = inactive state high
Signed-off-by: Knut Wohlrab knut.wohl...@de.bosch.com
Signed-off-by: Dirk Behme dirk.be...@de.bosch.com
Acked-by: Shawn Guo shawn@linaro.org
CC: Mark Brown broo...@opensource.wolfsonmicro.com
---
Changes in v2:
No functional changes on the patch itself. Add Acked-by and Sob tags,
CC to Mark Brown.
drivers/spi/spi-imx.c |6 --
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index e834ff8..d64655b 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -197,6 +197,7 @@ static unsigned int spi_imx_clkdiv_2(unsigned int fin,
#define MX51_ECSPI_CONFIG_SCLKPOL(cs) (1 ((cs) + 4))
#define MX51_ECSPI_CONFIG_SBBCTRL(cs) (1 ((cs) + 8))
#define MX51_ECSPI_CONFIG_SSBPOL(cs) (1 ((cs) + 12))
+#define MX51_ECSPI_CONFIG_SCLKCTL(cs) (1 ((cs) + 20))
#define MX51_ECSPI_INT 0x10
#define MX51_ECSPI_INT_TEEN(1 0)
@@ -287,9 +288,10 @@ static int __maybe_unused mx51_ecspi_config(struct
spi_imx_data *spi_imx,
if (config-mode SPI_CPHA)
cfg |= MX51_ECSPI_CONFIG_SCLKPHA(config-cs);
- if (config-mode SPI_CPOL)
+ if (config-mode SPI_CPOL) {
cfg |= MX51_ECSPI_CONFIG_SCLKPOL(config-cs);
-
+ cfg |= MX51_ECSPI_CONFIG_SCLKCTL(config-cs);
+ }
if (config-mode SPI_CS_HIGH)
cfg |= MX51_ECSPI_CONFIG_SSBPOL(config-cs);
--
1.7.0.4
--
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