[PATCH v1 2/3] MIPS: add basic options for CPUFreq support

[Wu Zhangjin <wuzhangjin@gmail.com>]

This patch adds basic options for MIPS CPUFreq support.

Since MIPS Timer's frequency is relative to the processor's frequency,
So, MIPS CPUFreq support not only need the processor's CPUFreq support
but also need an external timer. otherwise, we will make the system time
"mussy".

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
---
 arch/mips/Kconfig                |    3 +++
 arch/mips/kernel/cpufreq/Kconfig |   27 +++++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 0 deletions(-)
 create mode 100644 arch/mips/kernel/cpufreq/Kconfig

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 0e4b510..bfe8c39 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2146,6 +2146,7 @@ config MMU
 
 config I8253
        bool
+       select MIPS_EXTERNAL_TIMER
 
 config ZONE_DMA32
        bool
@@ -2222,6 +2223,8 @@ source "kernel/power/Kconfig"
 
 endmenu
 
+source "arch/mips/kernel/cpufreq/Kconfig"
+
 source "net/Kconfig"
 
 source "drivers/Kconfig"
diff --git a/arch/mips/kernel/cpufreq/Kconfig b/arch/mips/kernel/cpufreq/Kconfig
new file mode 100644
index 0000000..37983a1
--- /dev/null
+++ b/arch/mips/kernel/cpufreq/Kconfig
@@ -0,0 +1,27 @@
+#
+# CPU Frequency scaling
+#
+
+config MIPS_EXTERNAL_TIMER
+       bool
+
+config MIPS_CPUFREQ
+       bool
+       default y
+       depends on CPU_SUPPORTS_CPUFREQ && MIPS_EXTERNAL_TIMER
+
+if MIPS_CPUFREQ
+
+menu "CPU Frequency scaling"
+
+source "drivers/cpufreq/Kconfig"
+
+if CPU_FREQ
+
+comment "CPUFreq processor drivers"
+
+endif  # CPU_FREQ
+
+endmenu
+
+endif  # MIPS_CPUFREQ
-- 
1.6.2.1