diff options
| author | Mike Frysinger <vapier@gentoo.org> | 2009-03-26 15:42:12 -0400 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2009-04-02 06:42:18 -0400 |
| commit | bc72f50a659d0d1b551817e1910b9b2be1c7e496 (patch) | |
| tree | 619589e1569b7ad9dd8686b33030b6a5ca179873 /drivers/spi | |
| parent | 46ac352f0f9406a5f9aa157ac62867fb4650dfd3 (diff) | |
Blackfin: add BF538/BF539 SPI portmux handling
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/bfin_spi.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/spi/bfin_spi.c b/drivers/spi/bfin_spi.c index 0472c1a72f..bc3394ad59 100644 --- a/drivers/spi/bfin_spi.c +++ b/drivers/spi/bfin_spi.c @@ -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); \ |