commit 21c3dcad793b7e5cb490bf2ded5217be88cc4a63
author Chris Packham <judge.packham@gmail.com> Thu Oct 27 21:16:05 2016 +1300
committer Jagan Teki <jagan@openedev.com> Fri Nov 18 13:04:52 2016 +0530
tree c05005b35591ae1a99f010d1dbad4ebc7899119f
parent 276a9dcf216a5a6608e880e02cea86b9e5bc149a

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>

arch/arm/include/asm/arch-mvebu/spi.h

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 @@
 #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 */

drivers/spi/kirkwood_spi.c

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_mode(struct udevice *bus, uint mode)
 {
+	struct mvebu_spi_platdata *plat = dev_get_platdata(bus);
+	struct kwspi_registers *reg = plat->spireg;
+	u32 data = readl(&reg->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, &reg->cfg);
+
 	return 0;
 }