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-rw-r--r--drivers/video/aty/mach64_ct.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/video/aty/mach64_ct.c b/drivers/video/aty/mach64_ct.c
index c50c7cf26fe..2745b853948 100644
--- a/drivers/video/aty/mach64_ct.c
+++ b/drivers/video/aty/mach64_ct.c
@@ -8,6 +8,9 @@
#include <asm/io.h>
#include <video/mach64.h>
#include "atyfb.h"
+#ifdef CONFIG_PPC
+#include <asm/machdep.h>
+#endif
#undef DEBUG
@@ -536,6 +539,14 @@ static int __devinit aty_init_pll_ct(const struct fb_info *info,
pll->ct.xclk_post_div_real = postdividers[xpost_div];
pll->ct.mclk_fb_div = q * pll->ct.xclk_post_div_real / 8;
+#ifdef CONFIG_PPC
+ if (machine_is(powermac)) {
+ /* Override PLL_EXT_CNTL & 0x07. */
+ pll->ct.xclk_post_div = xpost_div;
+ pll->ct.xclk_ref_div = 1;
+ }
+#endif
+
#ifdef DEBUG
pllmclk = (1000000 * pll->ct.mclk_fb_mult * pll->ct.mclk_fb_div) /
(par->ref_clk_per * pll->ct.pll_ref_div);