diff options
| author | Mark Brown <broonie@linaro.org> | 2013-07-10 13:57:26 (GMT) |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-07-15 10:34:51 (GMT) |
| commit | a2fd4f9fa3b9f051550b36c4dfa74bc32bda24ee (patch) | |
| tree | b317a65457403d0e3175cd3fa36a66b6b2627527 /drivers/spi/spi.c | |
| parent | ad81f0545ef01ea651886dddac4bef6cec930092 (diff) | |
| download | linux-fsl-qoriq-a2fd4f9fa3b9f051550b36c4dfa74bc32bda24ee.tar.xz | |
spi: Support transfer speed checking in the core
Allow drivers to avoid implementing their own checks for simple rates by
specifying the limits in the master structure.
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi/spi.c')
| -rw-r--r-- | drivers/spi/spi.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 978dda2..a52f166 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1387,6 +1387,13 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message) BIT(xfer->bits_per_word - 1))) return -EINVAL; } + + if (xfer->speed_hz && master->min_speed_hz && + xfer->speed_hz < master->min_speed_hz) + return -EINVAL; + if (xfer->speed_hz && master->max_speed_hz && + xfer->speed_hz > master->max_speed_hz) + return -EINVAL; } message->spi = spi; |