diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2012-03-15 18:42:31 +0100 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2012-03-15 15:14:13 -0600 |
| commit | 35faa55cff56441477973e454f62408714f35cd3 (patch) | |
| tree | 933a91b2e07ba392fa04d2e00aaa0d99e4d8553e /drivers/spi | |
| parent | bb9c5687e8cd02d6f8a3aea40c118b439cb09501 (diff) | |
| download | blackbird-obmc-linux-35faa55cff56441477973e454f62408714f35cd3.tar.gz blackbird-obmc-linux-35faa55cff56441477973e454f62408714f35cd3.zip | |
spi/fsl-espi: make the clock computation easier to read
The -1 +1 thingy should probably do what DIV_ROUND_UP does. The 4 is 2
the "platform_clock => sysclock" and 2 from the computation part. The 64
is the same 4 times 16.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-fsl-espi.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c index d770f03705c3..43350f999314 100644 --- a/drivers/spi/spi-fsl-espi.c +++ b/drivers/spi/spi-fsl-espi.c @@ -180,7 +180,7 @@ static int fsl_espi_setup_transfer(struct spi_device *spi, if ((mpc8xxx_spi->spibrg / hz) > 64) { cs->hw_mode |= CSMODE_DIV16; - pm = (mpc8xxx_spi->spibrg - 1) / (hz * 64) + 1; + pm = DIV_ROUND_UP(mpc8xxx_spi->spibrg, hz * 16 * 4); WARN_ONCE(pm > 16, "%s: Requested speed is too low: %d Hz. " "Will use %d Hz instead.\n", dev_name(&spi->dev), @@ -188,7 +188,7 @@ static int fsl_espi_setup_transfer(struct spi_device *spi, if (pm > 16) pm = 16; } else { - pm = (mpc8xxx_spi->spibrg - 1) / (hz * 4) + 1; + pm = DIV_ROUND_UP(mpc8xxx_spi->spibrg, hz * 4); } if (pm) pm--; |
