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-rw-r--r--arch/arm/mach-shmobile/Kconfig12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/Kconfig b/arch/arm/mach-shmobile/Kconfig
index f2b88c5fe142..4c704b4e8b34 100644
--- a/arch/arm/mach-shmobile/Kconfig
+++ b/arch/arm/mach-shmobile/Kconfig
@@ -70,6 +70,18 @@ endmenu
70 70
71menu "Timer and clock configuration" 71menu "Timer and clock configuration"
72 72
73config SHMOBILE_TIMER_HZ
74 int "Kernel HZ (jiffies per second)"
75 range 32 1024
76 default "128"
77 help
78 Allows the configuration of the timer frequency. It is customary
79 to have the timer interrupt run at 1000 Hz or 100 Hz, but in the
80 case of low timer frequencies other values may be more suitable.
81 SH-Mobile systems using a 32768 Hz RCLK for clock events may want
82 to select a HZ value such as 128 that can evenly divide RCLK.
83 A HZ value that does not divide evenly may cause timer drift.
84
73config SH_TIMER_CMT 85config SH_TIMER_CMT
74 bool "CMT timer driver" 86 bool "CMT timer driver"
75 default y 87 default y