From f8ede0f700f5478851f242f291d203cde54ca6cf Mon Sep 17 00:00:00 2001 From: Wu Zhangjin Date: Tue, 17 Nov 2009 01:32:59 +0800 Subject: MIPS: Loongson 2F: Add CPU frequency scaling support Loongson 2F supports CPU clock scaling. When put it into wait mode by setting the frequency as ZERO it will stay in this mode until an external interrupt wakes the CPU again. To enable clock scaling support, an external timer of a known stable rate is required. Signed-off-by: Wu Zhangjin Cc: linux-mips@linux-mips.org Cc: cpufreq@vger.kernel.org, Cc: Dave Jones , Cc: Dominik Brodowski , Cc: yanh@lemote.com Cc: huhb@lemote.com, Patchwork: http://patchwork.linux-mips.org/patch/660/ Patchwork: http://patchwork.linux-mips.org/patch/751/ Signed-off-by: Ralf Baechle --- arch/mips/loongson/common/env.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/mips/loongson/common/env.c') diff --git a/arch/mips/loongson/common/env.c b/arch/mips/loongson/common/env.c index b9ef50385541..196d947d929a 100644 --- a/arch/mips/loongson/common/env.c +++ b/arch/mips/loongson/common/env.c @@ -17,11 +17,14 @@ * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ +#include + #include #include unsigned long bus_clock, cpu_clock_freq; +EXPORT_SYMBOL(cpu_clock_freq); unsigned long memsize, highmemsize; /* pmon passes arguments in 32bit pointers */ -- cgit v1.2.3