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path: root/drivers/spi/davinci_spi.c
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Diffstat (limited to 'drivers/spi/davinci_spi.c')
-rw-r--r--drivers/spi/davinci_spi.c49
1 files changed, 46 insertions, 3 deletions
diff --git a/drivers/spi/davinci_spi.c b/drivers/spi/davinci_spi.c
index e3fb321..28fb3a2 100644
--- a/drivers/spi/davinci_spi.c
+++ b/drivers/spi/davinci_spi.c
@@ -32,7 +32,27 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
if (!ds)
return NULL;
- ds->regs = (struct davinci_spi_regs *)CONFIG_SYS_SPI_BASE;
+ ds->slave.bus = bus;
+ ds->slave.cs = cs;
+
+ switch (bus) {
+ case SPI0_BUS:
+ ds->regs = (struct davinci_spi_regs *)SPI0_BASE;
+ break;
+#ifdef CONFIG_SYS_SPI1
+ case SPI1_BUS:
+ ds->regs = (struct davinci_spi_regs *)SPI0_BASE;
+ break;
+#endif
+#ifdef CONFIG_SYS_SPI2
+ case SPI2_BUS:
+ ds->regs = (struct davinci_spi_regs *)SPI2_BASE;
+ break;
+#endif
+ default: /* Invalid bus number */
+ return NULL;
+ }
+
ds->freq = max_hz;
return &ds->slave;
@@ -59,7 +79,7 @@ int spi_claim_bus(struct spi_slave *slave)
writel(SPIGCR1_MASTER_MASK | SPIGCR1_CLKMOD_MASK, &ds->regs->gcr1);
/* CS, CLK, SIMO and SOMI are functional pins */
- writel((SPIPC0_EN0FUN_MASK | SPIPC0_CLKFUN_MASK |
+ writel(((1 << slave->cs) | SPIPC0_CLKFUN_MASK |
SPIPC0_DOFUN_MASK | SPIPC0_DIFUN_MASK), &ds->regs->pc0);
/* setup format */
@@ -264,7 +284,30 @@ out:
int spi_cs_is_valid(unsigned int bus, unsigned int cs)
{
- return bus == 0 && cs == 0;
+ int ret = 0;
+
+ switch (bus) {
+ case SPI0_BUS:
+ if (cs < SPI0_NUM_CS)
+ ret = 1;
+ break;
+#ifdef CONFIG_SYS_SPI1
+ case SPI1_BUS:
+ if (cs < SPI1_NUM_CS)
+ ret = 1;
+ break;
+#endif
+#ifdef CONFIG_SYS_SPI2
+ case SPI2_BUS:
+ if (cs < SPI2_NUM_CS)
+ ret = 1;
+ break;
+#endif
+ default:
+ /* Invalid bus number. Do nothing */
+ break;
+ }
+ return ret;
}
void spi_cs_activate(struct spi_slave *slave)