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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>
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2 changed files with 19 additions and 0 deletions
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@ -52,6 +52,10 @@ struct kwspi_registers {
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#define KWSPI_ADRLEN_3BYTE (2 << 8)
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#define KWSPI_ADRLEN_4BYTE (3 << 8)
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#define KWSPI_ADRLEN_MASK (3 << 8)
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#define KWSPI_CPOL (1 << 11)
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#define KWSPI_CPHA (1 << 12)
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#define KWSPI_TXLSBF (1 << 13)
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#define KWSPI_RXLSBF (1 << 14)
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#define KWSPI_IRQUNMASK 1 /* unmask SPI interrupt */
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#define KWSPI_IRQMASK 0 /* mask SPI interrupt */
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@ -271,6 +271,21 @@ static int mvebu_spi_set_speed(struct udevice *bus, uint hz)
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static int mvebu_spi_set_mode(struct udevice *bus, uint mode)
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{
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struct mvebu_spi_platdata *plat = dev_get_platdata(bus);
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struct kwspi_registers *reg = plat->spireg;
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u32 data = readl(®->cfg);
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data &= ~(KWSPI_CPHA | KWSPI_CPOL | KWSPI_RXLSBF | KWSPI_TXLSBF);
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if (mode & SPI_CPHA)
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data |= KWSPI_CPHA;
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if (mode & SPI_CPOL)
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data |= KWSPI_CPOL;
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if (mode & SPI_LSB_FIRST)
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data |= (KWSPI_RXLSBF | KWSPI_TXLSBF);
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writel(data, ®->cfg);
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return 0;
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}
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