diff options
| 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/loongson/Kconfig | |
| parent | 9726b43a4d7aaa5b30f559e78768aeb3d17bc224 (diff) | |
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/loongson/Kconfig')
| -rw-r--r-- | arch/mips/loongson/Kconfig | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/mips/loongson/Kconfig b/arch/mips/loongson/Kconfig index 8b5cc138611..7a86987b478 100644 --- a/arch/mips/loongson/Kconfig +++ b/arch/mips/loongson/Kconfig @@ -34,10 +34,10 @@ config LEMOTE_MACH2F select ARCH_SPARSEMEM_ENABLE select BOARD_SCACHE select BOOT_ELF32 - select CEVT_R4K + select CEVT_R4K if ! MIPS_EXTERNAL_TIMER select CPU_HAS_WB select CS5536 - select CSRC_R4K + select CSRC_R4K if ! MIPS_EXTERNAL_TIMER select DMA_NONCOHERENT select GENERIC_HARDIRQS_NO__DO_IRQ select GENERIC_ISA_DMA_SUPPORT_BROKEN @@ -65,6 +65,7 @@ config CS5536 config CS5536_MFGPT bool "CS5536 MFGPT Timer" depends on CS5536 + select MIPS_EXTERNAL_TIMER help This option enables the mfgpt0 timer of AMD CS5536. |