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authorPaul Mundt <lethal@linux-sh.org>2007-05-09 17:33:24 +0900
committerPaul Mundt <lethal@linux-sh.org>2007-05-09 17:33:24 +0900
commit57be2b484a417bffae66359b9b89e7239480b729 (patch)
treed517f5b449b4f6b629790476082a4a7c478112bb /arch/sh/Kconfig
parent1ce7ddd5f4cc754b6afe9eec5cee89ede75348ea (diff)
downloadop-kernel-dev-57be2b484a417bffae66359b9b89e7239480b729.zip
op-kernel-dev-57be2b484a417bffae66359b9b89e7239480b729.tar.gz
sh: clockevent/clocksource/hrtimers/nohz TMU support.
This adds basic support for clockevents and clocksources, presently only implemented for TMU-based systems (which are the majority of SH-3 and SH-4 systems). The old NO_IDLE_HZ implementation is also dropped completely, the only users of this were on TMU-based systems anyways. More work needs to be done to generalize the TMU handling, in that the current implementation is rather tied to the notion of TMU0 and TMU1 utilization. Additionally, as more SH timers switch over to this scheme, we'll be able to gut most of the remaining system timer infrastructure that existed before. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/Kconfig')
-rw-r--r--arch/sh/Kconfig29
1 files changed, 7 insertions, 22 deletions
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index d74eb12..038179e 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -52,6 +52,9 @@ config GENERIC_IOMAP
config GENERIC_TIME
def_bool n
+config GENERIC_CLOCKEVENTS
+ def_bool n
+
config SYS_SUPPORTS_APM_EMULATION
bool
@@ -436,11 +439,11 @@ endmenu
menu "Timer and clock configuration"
-if !GENERIC_TIME
-
config SH_TMU
bool "TMU timer support"
depends on CPU_SH3 || CPU_SH4
+ select GENERIC_TIME
+ select GENERIC_CLOCKEVENTS
default y
help
This enables the use of the TMU as the system timer.
@@ -459,8 +462,6 @@ config SH_MTU2
help
This enables the use of the MTU2 as the system timer.
-endif
-
config SH_TIMER_IRQ
int
default "28" if CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785
@@ -468,24 +469,6 @@ config SH_TIMER_IRQ
default "140" if CPU_SUBTYPE_SH7206
default "16"
-config NO_IDLE_HZ
- bool "Dynamic tick timer"
- help
- Select this option if you want to disable continuous timer ticks
- and have them programmed to occur as required. This option saves
- power as the system can remain in idle state for longer.
-
- By default dynamic tick is disabled during the boot, and can be
- manually enabled with:
-
- echo 1 > /sys/devices/system/timer/timer0/dyn_tick
-
- Alternatively, if you want dynamic tick automatically enabled
- during boot, pass "dyntick=enable" via the kernel command string.
-
- Please note that dynamic tick may affect the accuracy of
- timekeeping on some platforms depending on the implementation.
-
config SH_PCLK_FREQ
int "Peripheral clock frequency (in Hz)"
default "27000000" if CPU_SUBTYPE_SH73180 || CPU_SUBTYPE_SH7343
@@ -509,6 +492,8 @@ config SH_CLK_MD
help
MD2 - MD0 pin setting.
+source "kernel/time/Kconfig"
+
endmenu
menu "CPU Frequency scaling"
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