diff options
| author | Greg Ungerer <gerg@uclinux.org> | 2014-09-28 23:24:04 +1000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2014-10-01 19:21:51 +0100 |
| commit | df59fa7f4bca9658b75f0f5fee225b3a057475c5 (patch) | |
| tree | 6c01e397e59715c8043f0de634299f2273bac18b /Makefile | |
| parent | 7d1311b93e58ed55f3a31cc8f94c4b8fe988a2b9 (diff) | |
spi: orion: support armada extended baud rates
The Armada SoC family implementation of this SPI hardware module has
extended the configuration register to allow for a wider range of SPI
clock rates. Specifically the Serial Baud Rate Pre-selection bits in the
SPI Interface Configuration Register now also use bits 6 and 7 as well.
Modify the baud rate calculation to handle these differences for the
Armada case. Potentially a baud rate can be setup using a number of
different pre-scalar and scalar combinations. This code tries all
possible pre-scalar divisors (8 in total) to try and find the most
accurate set.
This change introduces (and documents) a new device tree compatible
device name "armada-370-spi" to support this.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Reviewed-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'Makefile')
0 files changed, 0 insertions, 0 deletions