MIPS: Add basic CPUFreq options.
authorWu Zhangjin <wuzhangjin@gmail.com>
Mon, 16 Nov 2009 17:32:58 +0000 (01:32 +0800)
committerRalf Baechle <ralf@linux-mips.org>
Thu, 17 Dec 2009 01:57:20 +0000 (01:57 +0000)
This patch adds basic options for MIPS CPUFreq support.

Since the cp0 timer's frequency is based on the processor clockrate it can
not be used with CPUFReq; an additional external timer 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/659/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
arch/mips/Kconfig
arch/mips/kernel/cpufreq/Kconfig [new file with mode: 0644]

index e7f385444d41a439dbc207dc5e568511bfcaeb2c..435838ec9591084a92ef29d60ddc81f940a155d1 100644 (file)
@@ -2161,6 +2161,7 @@ config MMU
 
 config I8253
        bool
+       select MIPS_EXTERNAL_TIMER
 
 config ZONE_DMA32
        bool
@@ -2237,6 +2238,8 @@ 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 (file)
index 0000000..37983a1
--- /dev/null
@@ -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