[PATCH] set correct mclk/xclk values for aty in ibook

[Olaf Hering]

The first iBook needs special mclk/xclk values, or the screen will show
only garbage. A patch like this went into 2.4.23. It stopped working
after 2.6.10-rc1.

http://linux.bkbits.net:8080/linux-2.4/cset@3f966ca7mqKxZorh7Uw2SBAuVbv3mA

It was discussed here:
http://marc.theaimsgroup.com/?t=106345749200001&r=1&w=4

Signed-off-by: Olaf Hering <olh@xxxxxxx>

diff -purN linux-2.6.10-rc1-bk9.orig/drivers/video/aty/atyfb_base.c linux-2.6.10-rc1-bk9-olh/drivers/video/aty/atyfb_base.c
--- linux-2.6.10-rc1-bk9.orig/drivers/video/aty/atyfb_base.c	2004-10-30 20:13:02.000000000 +0200
+++ linux-2.6.10-rc1-bk9-olh/drivers/video/aty/atyfb_base.c	2004-11-01 16:29:57.613561216 +0100
@@ -2190,6 +2190,14 @@ static int __init aty_init(struct fb_inf
 
 	par->aty_cmap_regs =
 	    (struct aty_cmap_regs __iomem *) (par->ati_regbase + 0xc0);
+#ifdef CONFIG_PPC_PMAC
+	/* The Apple iBook1 uses non-standard memory frequencies. We detect it
+	 * and set the frequency manually. */
+	if (machine_is_compatible("PowerBook2,1")) {
+		par->pll_limits.mclk = 70;
+		par->pll_limits.xclk = 53;
+	}
+#endif
 
 	if (pll)
 		par->pll_limits.pll_max = pll;

-- 
USB is for mice, FireWire is for men!

sUse lINUX ag, nÃRNBERG
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