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| author | Chris Packham <judge.packham@gmail.com> | 2016-10-27 21:16:05 +1300 |
|---|---|---|
| committer | Jagan Teki <jagan@openedev.com> | 2016-11-18 13:04:52 +0530 |
| commit | ebfa18cb3d8b5e6f57ac22e39b21c4fc1c1d3597 (patch) | |
| tree | c05005b35591ae1a99f010d1dbad4ebc7899119f | |
| parent | c2cbd164ea5b5f564fcf03447c7bf9ec4a9f5699 (diff) | |
| download | u-boot-imx-ebfa18cb3d8b5e6f57ac22e39b21c4fc1c1d3597.zip u-boot-imx-ebfa18cb3d8b5e6f57ac22e39b21c4fc1c1d3597.tar.gz u-boot-imx-ebfa18cb3d8b5e6f57ac22e39b21c4fc1c1d3597.tar.bz2 | |
spi: kirkwood_spi: implement mvebu_spi_set_mode()
Set the appropriate bits in the interface config register based
on the SPI_ mode flags.
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Jagan Teki <jteki@openedev.com>
Signed-off-by: Chris Packham <judge.packham@gmail.com>
| -rw-r--r-- | arch/arm/include/asm/arch-mvebu/spi.h | 4 | ||||
| -rw-r--r-- | drivers/spi/kirkwood_spi.c | 15 |
2 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-mvebu/spi.h b/arch/arm/include/asm/arch-mvebu/spi.h index 78869a2..3545aed 100644 --- a/arch/arm/include/asm/arch-mvebu/spi.h +++ b/arch/arm/include/asm/arch-mvebu/spi.h @@ -52,6 +52,10 @@ struct kwspi_registers { #define KWSPI_ADRLEN_3BYTE (2 << 8) #define KWSPI_ADRLEN_4BYTE (3 << 8) #define KWSPI_ADRLEN_MASK (3 << 8) +#define KWSPI_CPOL (1 << 11) +#define KWSPI_CPHA (1 << 12) +#define KWSPI_TXLSBF (1 << 13) +#define KWSPI_RXLSBF (1 << 14) #define KWSPI_IRQUNMASK 1 /* unmask SPI interrupt */ #define KWSPI_IRQMASK 0 /* mask SPI interrupt */ diff --git a/drivers/spi/kirkwood_spi.c b/drivers/spi/kirkwood_spi.c index 6851ba9..791f3e8 100644 --- a/drivers/spi/kirkwood_spi.c +++ b/drivers/spi/kirkwood_spi.c @@ -271,6 +271,21 @@ static int mvebu_spi_set_speed(struct udevice *bus, uint hz) static int mvebu_spi_set_mode(struct udevice *bus, uint mode) { + struct mvebu_spi_platdata *plat = dev_get_platdata(bus); + struct kwspi_registers *reg = plat->spireg; + u32 data = readl(®->cfg); + + data &= ~(KWSPI_CPHA | KWSPI_CPOL | KWSPI_RXLSBF | KWSPI_TXLSBF); + + if (mode & SPI_CPHA) + data |= KWSPI_CPHA; + if (mode & SPI_CPOL) + data |= KWSPI_CPOL; + if (mode & SPI_LSB_FIRST) + data |= (KWSPI_RXLSBF | KWSPI_TXLSBF); + + writel(data, ®->cfg); + return 0; } |