fix "lxfb: extend PLL table to support dotclocks below 25 MHz"
authorJens Rottmann <JRottmann@LiPPERT-AT.de>
Wed, 14 May 2008 23:05:32 +0000 (16:05 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 15 May 2008 02:11:13 +0000 (19:11 -0700)
commit82f55af06af3d9c478292281ac37b48d2c43741e
tree430df5946f2521abac65622940d1ef8f4f9cb8ee
parent8b8b498836942c0c855333d357d121c0adeefbd9
fix "lxfb: extend PLL table to support dotclocks below 25 MHz"

The following patch caused a regression with OLPC panels:

 commit 3888d4639e78802c4ec1086127124e890461b9e4
    lxfb: extend PLL table to support dotclocks below 25 MHz

    Extends the PLL frequency table of the AMD Geode-LX frame buffer driver to
    make use of the DIV4 bit, thus adding support for dotclocks between 6 and 25
    MHz.  These are needed for small LCDs (e.g.  320x240).  Also inserts some
    intermediate steps between pre-existing frequencies.

The problem was the insertion of intermediate steps into the frequency
table; they would cause the wrong frequency to be matched.  This patch
drops those intermediate frequencies while keeping the sub-25MHz
frequencies.

Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Jens Rottmann <JRottmann@LiPPERT-AT.de>
Tested-by: Andres Salomon <dilinger@debian.org>
Acked-by: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/video/geode/lxfb_ops.c