sh: CMT clockevent platform driver

SuperH CMT clockevent driver.

Both 16-bit and 32-bit CMT versions are supported, but only 32-bit
is tested. This driver contains support for both clockevents and
clocksources, but no unregistration is supported at this point.

Works fine as clock source and/or event in periodic or oneshot mode.
Tested on sh7722 and sh7723, but should work with any cpu/architecture.

This version is lacking clocksource and early platform driver support
for now - this to minimize the amount of dependencies.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index ebabe518e729..5407e1295e51 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -397,6 +397,14 @@ source "arch/sh/boards/Kconfig"
 
 menu "Timer and clock configuration"
 
+config SH_TIMER_CMT
+        def_bool n
+        prompt "CMT support"
+        select GENERIC_TIME
+        select GENERIC_CLOCKEVENTS
+        help
+          This enables build of the CMT system timer driver.
+
 config SH_TMU
         def_bool y
         prompt "TMU timer support"