diff options
Diffstat (limited to 'drivers/spi/omap3_spi.c')
| -rw-r--r-- | drivers/spi/omap3_spi.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/drivers/spi/omap3_spi.c b/drivers/spi/omap3_spi.c index 073a98f0c1..c62288b160 100644 --- a/drivers/spi/omap3_spi.c +++ b/drivers/spi/omap3_spi.c @@ -106,8 +106,15 @@ int spi_claim_bus(struct spi_device *spi) /* standard 4-wire master mode: SCK, MOSI/out, MISO/in, nCS * REVISIT: this controller could support SPI_3WIRE mode. */ - conf &= ~(OMAP3_MCSPI_CHCONF_IS|OMAP3_MCSPI_CHCONF_DPE1); - conf |= OMAP3_MCSPI_CHCONF_DPE0; + if (omap3_master->swap_miso_mosi) { + /* swapped */ + conf |= (OMAP3_MCSPI_CHCONF_IS | OMAP3_MCSPI_CHCONF_DPE1); + conf &= ~OMAP3_MCSPI_CHCONF_DPE0; + } else { + /* bootloader default */ + conf &= ~(OMAP3_MCSPI_CHCONF_IS | OMAP3_MCSPI_CHCONF_DPE1); + conf |= OMAP3_MCSPI_CHCONF_DPE0; + } /* wordlength */ conf &= ~OMAP3_MCSPI_CHCONF_WL_MASK; @@ -343,6 +350,17 @@ static int omap3_spi_setup(struct spi_device *spi) return 0; } +static int omap3_spi_probe_dt(struct device_d *dev, struct omap3_spi_master *omap3_master) +{ + if (!IS_ENABLED(CONFIG_OFDEVICE) || !dev->device_node) + return -ENODEV; + + if (of_property_read_bool(dev->device_node, "ti,pindir-d0-out-d1-in")) + omap3_master->swap_miso_mosi = 1; + + return 0; +} + static int omap3_spi_probe(struct device_d *dev) { struct spi_master *master; @@ -356,6 +374,8 @@ static int omap3_spi_probe(struct device_d *dev) omap3_master = xzalloc(sizeof(*omap3_master)); + omap3_spi_probe_dt(dev, omap3_master); + master = &omap3_master->master; master->dev = dev; |