From 9fc56631a4f784ecaf860ae822d48580cd4317ed Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Thu, 11 Feb 2016 11:37:38 +0100 Subject: spi: kirkwood_spi: Add support for multiple chip-selects on MVEBU Currently only chip-select 0 is supported by the kirkwood SPI driver. The Armada XP / 38x SoCs also use this driver and support multiple chip selects. This patch adds support for multiple CS on MVEBU. The register definitions are restructured a bit with this patch. Grouping them to the corresponding registers. Signed-off-by: Stefan Roese Cc: Luka Perkov Reviewed-by: Jagan Teki --- drivers/spi/kirkwood_spi.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'drivers/spi') diff --git a/drivers/spi/kirkwood_spi.c b/drivers/spi/kirkwood_spi.c index 80cdbd08fc..6851ba942f 100644 --- a/drivers/spi/kirkwood_spi.c +++ b/drivers/spi/kirkwood_spi.c @@ -283,6 +283,19 @@ static int mvebu_spi_xfer(struct udevice *dev, unsigned int bitlen, return _spi_xfer(plat->spireg, bitlen, dout, din, flags); } +static int mvebu_spi_claim_bus(struct udevice *dev) +{ + struct udevice *bus = dev->parent; + struct mvebu_spi_platdata *plat = dev_get_platdata(bus); + + /* Configure the chip-select in the CTRL register */ + clrsetbits_le32(&plat->spireg->ctrl, + KWSPI_CS_MASK << KWSPI_CS_SHIFT, + spi_chip_select(dev) << KWSPI_CS_SHIFT); + + return 0; +} + static int mvebu_spi_probe(struct udevice *bus) { struct mvebu_spi_platdata *plat = dev_get_platdata(bus); @@ -305,6 +318,7 @@ static int mvebu_spi_ofdata_to_platdata(struct udevice *bus) } static const struct dm_spi_ops mvebu_spi_ops = { + .claim_bus = mvebu_spi_claim_bus, .xfer = mvebu_spi_xfer, .set_speed = mvebu_spi_set_speed, .set_mode = mvebu_spi_set_mode, -- cgit v1.2.3