bfin_spi: add spi_set_speed

The new speed will be applied by spi_claim_bus.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/drivers/spi/bfin_spi.c b/drivers/spi/bfin_spi.c
index e8a4de5b9facc39f81e6c58c4342f4449700cfa3..213e79281aca3ddb8f24841927c4a890a3181aaa 100644 (file)
--- a/drivers/spi/bfin_spi.c
+++ b/drivers/spi/bfin_spi.c
@@ -138,13 +138,29 @@ static const unsigned short cs_pins[][7] = {
 #endif
 };
 
+void spi_set_speed(struct spi_slave *slave, uint hz)
+{
+       struct bfin_spi_slave *bss = to_bfin_spi_slave(slave);
+       ulong sclk;
+       u32 baud;
+
+       sclk = get_sclk();
+       baud = sclk / (2 * hz);
+       /* baud should be rounded up */
+       if (sclk % (2 * hz))
+               baud += 1;
+       if (baud < 2)
+               baud = 2;
+       else if (baud > (u16)-1)
+               baud = -1;
+       bss->baud = baud;
+}
+
 struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
                unsigned int max_hz, unsigned int mode)
 {
        struct bfin_spi_slave *bss;
-       ulong sclk;
        u32 mmr_base;
-       u32 baud;
 
        if (!spi_cs_is_valid(bus, cs))
                return NULL;
@@ -166,16 +182,6 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
                default: return NULL;
        }
 
-       sclk = get_sclk();
-       baud = sclk / (2 * max_hz);
-       /* baud should be rounded up */
-       if (sclk % (2 * max_hz))
-               baud += 1;
-       if (baud < 2)
-               baud = 2;
-       else if (baud > (u16)-1)
-               baud = -1;
-
        bss = malloc(sizeof(*bss));
        if (!bss)
                return NULL;
@@ -187,8 +193,8 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
        if (mode & SPI_CPHA) bss->ctl |= CPHA;
        if (mode & SPI_CPOL) bss->ctl |= CPOL;
        if (mode & SPI_LSB_FIRST) bss->ctl |= LSBF;
-       bss->baud = baud;
        bss->flg = mode & SPI_CS_HIGH ? 1 : 0;
+       spi_set_speed(&bss->slave, max_hz);
 
        debug("%s: bus:%i cs:%i mmr:%x ctl:%x baud:%i flg:%i\n", __func__,
                bus, cs, mmr_base, bss->ctl, baud, bss->flg);