[MIPS] Make timer interrupt frequency configurable from kconfig.

Make HZ configurable.  DECSTATION can select 128/256/1024 HZ, JAZZ can
only select 100 HZ, others can select 100/128/250/256/1000/1024 HZ if
not explicitly specified).  Also remove all mach-xxx/param.h files and
update all defconfigs according to current HZ value.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 75 insertions, 0 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 50274fcacde0..35e038a974c6 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -168,6 +168,9 @@ config MACH_DECSTATION
         select SYS_SUPPORTS_32BIT_KERNEL
         select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
         select SYS_SUPPORTS_LITTLE_ENDIAN
+        select SYS_SUPPORTS_128HZ
+        select SYS_SUPPORTS_256HZ
+        select SYS_SUPPORTS_1024HZ
         help
           This enables support for DEC's MIPS based workstations.  For details
           see the Linux/MIPS FAQ on <http://www.linux-mips.org/> and the
@@ -265,6 +268,7 @@ config MACH_JAZZ
         select SYS_HAS_CPU_R4X00
         select SYS_SUPPORTS_32BIT_KERNEL
         select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
+        select SYS_SUPPORTS_100HZ
         help
          This a family of machines based on the MIPS R4030 chipset which was
          used by several vendors to build RISC/os and Windows NT workstations.
@@ -1707,6 +1711,77 @@ config NR_CPUS
           This is purely to save memory - each supported CPU adds
           approximately eight kilobytes to the kernel image.
 
+#
+# Timer Interrupt Frequency Configuration
+#
+
+choice
+        prompt "Timer frequency"
+        default HZ_250
+        help
+         Allows the configuration of the timer frequency.
+
+        config HZ_48
+                bool "48 HZ" if SYS_SUPPORTS_48HZ
+
+        config HZ_100
+                bool "100 HZ" if SYS_SUPPORTS_100HZ || SYS_SUPPORTS_ARBIT_HZ
+
+        config HZ_128
+                bool "128 HZ" if SYS_SUPPORTS_128HZ || SYS_SUPPORTS_ARBIT_HZ
+
+        config HZ_250
+                bool "250 HZ" if SYS_SUPPORTS_250HZ || SYS_SUPPORTS_ARBIT_HZ
+
+        config HZ_256
+                bool "256 HZ" if SYS_SUPPORTS_256HZ || SYS_SUPPORTS_ARBIT_HZ
+
+        config HZ_1000
+                bool "1000 HZ" if SYS_SUPPORTS_1000HZ || SYS_SUPPORTS_ARBIT_HZ
+
+        config HZ_1024
+                bool "1024 HZ" if SYS_SUPPORTS_1024HZ || SYS_SUPPORTS_ARBIT_HZ
+
+endchoice
+
+config SYS_SUPPORTS_48HZ
+        bool
+
+config SYS_SUPPORTS_100HZ
+        bool
+
+config SYS_SUPPORTS_128HZ
+        bool
+
+config SYS_SUPPORTS_250HZ
+        bool
+
+config SYS_SUPPORTS_256HZ
+        bool
+
+config SYS_SUPPORTS_1000HZ
+        bool
+
+config SYS_SUPPORTS_1024HZ
+        bool
+
+config SYS_SUPPORTS_ARBIT_HZ
+        bool
+        default y if !SYS_SUPPORTS_48HZ && !SYS_SUPPORTS_100HZ && \
+                     !SYS_SUPPORTS_128HZ && !SYS_SUPPORTS_250HZ && \
+                     !SYS_SUPPORTS_256HZ && !SYS_SUPPORTS_1000HZ && \
+                     !SYS_SUPPORTS_1024HZ
+
+config HZ
+        int
+        default 48 if HZ_48
+        default 100 if HZ_100
+        default 128 if HZ_128
+        default 250 if HZ_250
+        default 256 if HZ_256
+        default 1000 if HZ_1000
+        default 1024 if HZ_1024
+
 source "kernel/Kconfig.preempt"
 
 config RTC_DS1742