Blackfin: SMP: make core timers per-cpu clock events for HRT
SMP systems require per-cpu local clock event devices in order to enable
HRT support. One a BF561, we can use local core timer for this purpose.
Originally, there was one global core-timer clock event device set up for
core A.
To accomplish this feat, we need to split the gptimer0/core timer logic
so that each is a standalone clock event. There is no requirement that
we only have one clock event source anyways. Once we have this, we just
define per-cpu clock event devices for each local core timer.
Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index b483639..0bd26db 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -236,7 +236,7 @@
config SMP
depends on BF561
- select GENERIC_CLOCKEVENTS
+ select TICKSOURCE_CORETMR
bool "Symmetric multi-processing support"
---help---
This enables support for systems with more than one CPU,
@@ -610,23 +610,23 @@
bool "Generic clock events"
default y
-choice
- prompt "Kernel Tick Source"
+menu "Clock event device"
depends on GENERIC_CLOCKEVENTS
- default TICKSOURCE_CORETMR
-
config TICKSOURCE_GPTMR0
- bool "Gptimer0 (SCLK domain)"
+ bool "GPTimer0"
+ depends on !SMP
select BFIN_GPTIMERS
config TICKSOURCE_CORETMR
- bool "Core timer (CCLK domain)"
+ bool "Core timer"
+ default y
+endmenu
-endchoice
-
-config CYCLES_CLOCKSOURCE
- bool "Use 'CYCLES' as a clocksource"
+menu "Clock souce"
depends on GENERIC_CLOCKEVENTS
+config CYCLES_CLOCKSOURCE
+ bool "CYCLES"
+ default y
depends on !BFIN_SCRATCH_REG_CYCLES
depends on !SMP
help
@@ -637,10 +637,10 @@
writing the registers will most likely crash the kernel.
config GPTMR0_CLOCKSOURCE
- bool "Use GPTimer0 as a clocksource"
+ bool "GPTimer0"
select BFIN_GPTIMERS
- depends on GENERIC_CLOCKEVENTS
depends on !TICKSOURCE_GPTMR0
+endmenu
config ARCH_USES_GETTIMEOFFSET
depends on !GENERIC_CLOCKEVENTS