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Blackfin: add BF538/BF539 SPI portmux handling

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Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2009-03-26 15:42:12 -04:00
parent 46ac352f0f
commit bc72f50a65
1 changed files with 18 additions and 0 deletions
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18
drivers/spi/bfin_spi.c
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@ -36,6 +36,11 @@ MAKE_SPI_FUNC(SPI_BAUD, 0x14)
__attribute__((weak))
int spi_cs_is_valid(unsigned int bus, unsigned int cs)
{
#if defined(__ADSPBF538__) || defined(__ADSPBF539__)
/* The SPI1/SPI2 buses are weird ... only 1 CS */
if (bus > 0 && cs != 1)
return 0;
#endif
return (cs >= 1 && cs <= 7);
}
@ -204,6 +209,19 @@ static void spi_portmux(struct spi_slave *slave)
}
bfin_write_PORT_MUX(mux);
bfin_write_PORTF_FER(f_fer);
#elif defined(__ADSPBF538__) || defined(__ADSPBF539__)
u16 fer, pins;
if (slave->bus == 1)
pins = PD0 | PD1 | PD2 | (slave->cs == 1 ? PD4 : 0);
else if (slave->bus == 2)
pins = PD5 | PD6 | PD7 | (slave->cs == 1 ? PD9 : 0);
else
pins = 0;
if (pins) {
fer = bfin_read_PORTDIO_FER();
fer &= ~pins;
bfin_write_PORTDIO_FER(fer);
}
#elif defined(__ADSPBF54x__)
#define DO_MUX(port, pin) \
mux = ((mux & ~PORT_x_MUX_##pin##_MASK) | PORT_x_MUX_##pin##_FUNC_1); \