diff options
| author | Stefan Roese <sr@denx.de> | 2016-02-11 11:37:38 +0100 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2016-04-06 15:38:56 +0200 |
| commit | 9fc56631a4f784ecaf860ae822d48580cd4317ed (patch) | |
| tree | 754c9b85d12926bb08006681a739c09c68d4cd7e /drivers | |
| parent | 4ed6ed3c27a069a00c8a557d606a05276cc4653e (diff) | |
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 <sr@denx.de>
Cc: Luka Perkov <luka.perkov@sartura.hr>
Reviewed-by: Jagan Teki <jteki@openedev.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/spi/kirkwood_spi.c | 14 |
1 files changed, 14 insertions, 0 deletions
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, |