sparc32: generic clockevent support

The kernel uses l14 timers as clockevents. l10 timer is used
as clocksource if platform master_l10_counter isn't constantly
zero. The clocksource is continuous, so it's possible to use
high resolution timers. l10 timer is also used as clockevent
on UP configurations.

This realization is for sun4m, sun4d, sun4c, microsparc-IIep
and LEON platforms. The appropriate LEON changes was made by
Konrad Eisele.

In case of sun4m's oneshot mode, profile irq is zeroed in
smp4m_percpu_timer_interrupt(). It is maybe
needless (double, triple etc overflow does nothing).

sun4d is able to have oneshot mode too, but I haven't
any way to test it. So code of its percpu timer handler
is made as much equal to the current code as possible.

The patch is tested on sun4m box in SMP mode by me,
and tested by Konrad on leon in up mode (leon smp
is broken atm - due to other reasons).

Signed-off-by: Tkhai Kirill <tkhai@yandex.ru>
Tested-by: Konrad Eisele <konrad@gaisler.com> [leon up]
[sam: revised patch to provide generic support for leon]
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 6 deletions

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 6c0683d3fcba..db4e821b3ed0 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -73,17 +73,12 @@ config BITS
         default 32 if SPARC32
         default 64 if SPARC64
 
-config ARCH_USES_GETTIMEOFFSET
-        bool
-        default y if SPARC32
-
 config GENERIC_CMOS_UPDATE
         bool
         default y
 
 config GENERIC_CLOCKEVENTS
-        bool
-        default y if SPARC64
+        def_bool y
 
 config IOMMU_HELPER
         bool