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| author | Wu Zhangjin <wuzhangjin@gmail.com> | 2009-11-17 01:32:59 +0800 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2009-12-17 01:57:20 +0000 |
| commit | f8ede0f700f5478851f242f291d203cde54ca6cf (patch) | |
| tree | 37fba17288bcd12468c454eb6c585d72fb6f9770 /arch/mips/kernel/cpu-probe.c | |
| parent | 9726b43a4d7aaa5b30f559e78768aeb3d17bc224 (diff) | |
| download | op-kernel-dev-f8ede0f700f5478851f242f291d203cde54ca6cf.zip op-kernel-dev-f8ede0f700f5478851f242f291d203cde54ca6cf.tar.gz | |
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 <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: cpufreq@vger.kernel.org,
Cc: Dave Jones <davej@redhat.com>,
Cc: Dominik Brodowski <linux@dominikbrodowski.net>,
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 <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/cpu-probe.c')
| -rw-r--r-- | arch/mips/kernel/cpu-probe.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index 7a51866..80e202e 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -16,6 +16,7 @@ #include <linux/ptrace.h> #include <linux/smp.h> #include <linux/stddef.h> +#include <linux/module.h> #include <asm/bugs.h> #include <asm/cpu.h> @@ -32,6 +33,7 @@ * the CPU very much. */ void (*cpu_wait)(void); +EXPORT_SYMBOL(cpu_wait); static void r3081_wait(void) { |
