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| author | Dirk Behme <dirk.behme@gmail.com> | 2013-05-11 07:25:54 +0200 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2013-06-26 16:23:30 +0200 |
| commit | 9a30903b44a63861de93d5beaaf4c91173bbac0c (patch) | |
| tree | 5a4af903597414caf5d8f62d7725a32858709e78 /drivers/block/dwc_ahsata.c | |
| parent | 8d4c4ffb95d528f6a709bf68da5e0beb0f4ee72f (diff) | |
| download | talos-obmc-uboot-9a30903b44a63861de93d5beaaf4c91173bbac0c.tar.gz talos-obmc-uboot-9a30903b44a63861de93d5beaaf4c91173bbac0c.zip | |
spi: mxc_spi: Update pre and post divider algorithm
The spi clock divisor is of the form x * (2**y), or x << y, where x is
1 to 16, and y is 0 to 15. Note the similarity with floating point numbers.
Convert the desired divisor to the smallest number which is >= desired divisor,
and can be represented in this form. The previous algorithm chose a divisor
which could be almost twice as large as needed.
Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Signed-off-by: Dirk Behme <dirk.behme@gmail.com>
Diffstat (limited to 'drivers/block/dwc_ahsata.c')
0 files changed, 0 insertions, 0 deletions
