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authorJens Rottmann <JRottmann@LiPPERT-AT.de>2008-04-28 05:15:22 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 11:58:39 -0400
commit3888d4639e78802c4ec1086127124e890461b9e4 (patch)
tree5a02c224f4a106ef43ba32b30771fa0829fad0d3 /drivers/video
parent5fb2d929a070fd31b8fb8f74cef8694a09853fdb (diff)
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. Signed-off-by: Jens Rottmann <JRottmann@LiPPERT-AT.de> Cc: Jordan Crouse <jordan.crouse@amd.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/geode/lxfb_ops.c112
1 files changed, 81 insertions, 31 deletions
diff --git a/drivers/video/geode/lxfb_ops.c b/drivers/video/geode/lxfb_ops.c
index a52c180062c8..afe8e33ac1c2 100644
--- a/drivers/video/geode/lxfb_ops.c
+++ b/drivers/video/geode/lxfb_ops.c
@@ -35,35 +35,85 @@ static const struct {
35 unsigned int pllval; 35 unsigned int pllval;
36 unsigned int freq; 36 unsigned int freq;
37} pll_table[] = { 37} pll_table[] = {
38 { 0x000031AC, 24923 }, 38 { 0x000131AC, 6231 },
39 { 0x0000215D, 25175 }, 39 { 0x0001215D, 6294 },
40 { 0x00001087, 27000 }, 40 { 0x00011087, 6750 },
41 { 0x0000216C, 28322 }, 41 { 0x0001216C, 7081 },
42 { 0x0000218D, 28560 }, 42 { 0x0001218D, 7140 },
43 { 0x000010C9, 31200 }, 43 { 0x000110C9, 7800 },
44 { 0x00003147, 31500 }, 44 { 0x00013147, 7875 },
45 { 0x000010A7, 33032 }, 45 { 0x000110A7, 8258 },
46 { 0x00002159, 35112 }, 46 { 0x00012159, 8778 },
47 { 0x00004249, 35500 }, 47 { 0x00014249, 8875 },
48 { 0x00000057, 36000 }, 48 { 0x00010057, 9000 },
49 { 0x0000219A, 37889 }, 49 { 0x0001219A, 9472 },
50 { 0x00002158, 39168 }, 50 { 0x00012158, 9792 },
51 { 0x00000045, 40000 }, 51 { 0x00010045, 10000 },
52 { 0x00000089, 43163 }, 52 { 0x00010089, 10791 },
53 { 0x000010E7, 44900 }, 53 { 0x000110E7, 11225 },
54 { 0x00002136, 45720 }, 54 { 0x00012136, 11430 },
55 { 0x00003207, 49500 }, 55 { 0x00013207, 12375 },
56 { 0x00002187, 50000 }, 56 { 0x00012187, 12500 },
57 { 0x00004286, 56250 }, 57 { 0x00014286, 14063 },
58 { 0x000010E5, 60065 }, 58 { 0x000110E5, 15016 },
59 { 0x00004214, 65000 }, 59 { 0x00014214, 16250 },
60 { 0x00001105, 68179 }, 60 { 0x00011105, 17045 },
61 { 0x000031E4, 74250 }, 61 { 0x000131E4, 18563 },
62 { 0x00003183, 75000 }, 62 { 0x00013183, 18750 },
63 { 0x00004284, 78750 }, 63 { 0x00014284, 19688 },
64 { 0x00001104, 81600 }, 64 { 0x00011104, 20400 },
65 { 0x00006363, 94500 }, 65 { 0x00016363, 23625 },
66 { 0x00005303, 97520 }, 66 { 0x00015303, 24380 },
67 { 0x000031AC, 24923 },
68 { 0x0000215D, 25175 },
69 { 0x00001087, 27000 },
70 { 0x0000216C, 28322 },
71 { 0x0000218D, 28560 },
72 { 0x00010041, 29913 },
73 { 0x000010C9, 31200 },
74 { 0x00003147, 31500 },
75 { 0x000141A1, 32400 },
76 { 0x000010A7, 33032 },
77 { 0x00012182, 33375 },
78 { 0x000141B1, 33750 },
79 { 0x00002159, 35112 },
80 { 0x00004249, 35500 },
81 { 0x00000057, 36000 },
82 { 0x000141E1, 37125 },
83 { 0x0000219A, 37889 },
84 { 0x00002158, 39168 },
85 { 0x00000045, 40000 },
86 { 0x000131A1, 40500 },
87 { 0x00010061, 42301 },
88 { 0x00000089, 43163 },
89 { 0x00012151, 43875 },
90 { 0x000010E7, 44900 },
91 { 0x00002136, 45720 },
92 { 0x000152E1, 47250 },
93 { 0x00010071, 48000 },
94 { 0x00003207, 49500 },
95 { 0x00002187, 50000 },
96 { 0x00014291, 50625 },
97 { 0x00011101, 51188 },
98 { 0x00017481, 54563 },
99 { 0x00004286, 56250 },
100 { 0x00014170, 57375 },
101 { 0x00016210, 58500 },
102 { 0x000010E5, 60065 },
103 { 0x00013140, 62796 },
104 { 0x00004214, 65000 },
105 { 0x00016250, 65250 },
106 { 0x00001105, 68179 },
107 { 0x000141C0, 69600 },
108 { 0x00015220, 70160 },
109 { 0x00010050, 72000 },
110 { 0x000031E4, 74250 },
111 { 0x00003183, 75000 },
112 { 0x00004284, 78750 },
113 { 0x00012130, 80052 },
114 { 0x00001104, 81600 },
115 { 0x00006363, 94500 },
116 { 0x00005303, 97520 },
67 { 0x00002183, 100187 }, 117 { 0x00002183, 100187 },
68 { 0x00002122, 101420 }, 118 { 0x00002122, 101420 },
69 { 0x00001081, 108000 }, 119 { 0x00001081, 108000 },
@@ -138,7 +188,7 @@ static void lx_set_clock(struct fb_info *info)
138 unsigned int diff, min, best = 0; 188 unsigned int diff, min, best = 0;
139 unsigned int freq, i; 189 unsigned int freq, i;
140 190
141 freq = (unsigned int) (0x3b9aca00 / info->var.pixclock); 191 freq = (unsigned int) (1000000000 / info->var.pixclock);
142 192
143 min = abs(pll_table[0].freq - freq); 193 min = abs(pll_table[0].freq - freq);
144 194
@@ -150,7 +200,7 @@ static void lx_set_clock(struct fb_info *info)
150 } 200 }
151 } 201 }
152 202
153 lx_set_dotpll(pll_table[best].pllval & 0x7FFF); 203 lx_set_dotpll(pll_table[best].pllval & 0x00017FFF);
154} 204}
155 205
156static void lx_graphics_disable(struct fb_info *info) 206static void lx_graphics_disable(struct fb_info *info)
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-25 10:44:58 -0500