On Thu, Nov 03, 2016 at 04:33:35PM -0700, Vineet Gupta wrote: > This adds support for > > - CONFIG_ARC_TIMERS : legacy 32-bit TIMER0 and TIMER1 which count UP > from @CNT to @LIMIT, before optionally triggering an interrupt. > These are programmed using ARC auxiliary register interface. > These are present in all ARC cores (ARC700 and ARC HS38) > TIMER0 serves as clockevent for all ARC linux builds. > TIMER1 is used for clocksource in arc700 builds. > > - CONFIG_ARC_TIMERS_64BIT: 64-bit counters, RTC and GFRC found in > ARC HS38 cores. These are independnet IP blocks with different > programming model respectively. > > Signed-off-by: Vineet Gupta <vgu...@synopsys.com> > ---
[ ... ] > config ARC > def_bool y > + select ARC_TIMERS > select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC > select BUILDTIME_EXTABLE_SORT > - select CLKSRC_OF > select CLONE_BACKWARDS > select COMMON_CLK > select GENERIC_ATOMIC64 if !ISA_ARCV2 || !(ARC_HAS_LL64 && ARC_HAS_LLSC) > @@ -115,6 +115,7 @@ config ISA_ARCOMPACT > > config ISA_ARCV2 > bool "ARC ISA v2" > + select ARC_TIMERS_64BIT > help > ISA for the Next Generation ARC-HS cores > > @@ -410,10 +411,6 @@ config ARC_HAS_DIV_REM > bool "Insn: div, divu, rem, remu" > default y > > -config ARC_TIMERS_64BIT > - bool "64-bit r/o cycle counters RTC (up) and GFRC (smp)" > - default y > - > config ARC_NUMBER_OF_INTERRUPTS > int "Number of interrupts" > range 8 240 > diff --git a/arch/arc/kernel/Makefile b/arch/arc/kernel/Makefile > index cfcdedf52ff8..8942c5c3b4c5 100644 > --- a/arch/arc/kernel/Makefile > +++ b/arch/arc/kernel/Makefile > @@ -8,7 +8,7 @@ > # Pass UTS_MACHINE for user_regset definition > CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"' > > -obj-y := arcksyms.o setup.o irq.o time.o reset.o ptrace.o process.o > devtree.o > +obj-y := arcksyms.o setup.o irq.o reset.o ptrace.o process.o devtree.o > obj-y += signal.o traps.o sys.o troubleshoot.o stacktrace.o disasm.o > obj-$(CONFIG_ISA_ARCOMPACT) += entry-compact.o intc-compact.o > obj-$(CONFIG_ISA_ARCV2) += entry-arcv2.o intc-arcv2.o > diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig > index e2c6e43cf8ca..a53bd50164e7 100644 > --- a/drivers/clocksource/Kconfig > +++ b/drivers/clocksource/Kconfig > @@ -282,6 +282,25 @@ config CLKSRC_MPS2 > select CLKSRC_MMIO > select CLKSRC_OF > > +config ARC_TIMERS > + bool "Support for 32-bit TIMERn counters in ARC Cores" if COMPILE_TEST > + depends on GENERIC_CLOCKEVENTS > + select CLKSRC_OF > + help > + These are legacy 32-bit TIMER0 and TIMER1 counters found on all ARC > cores > + (ARC700 as well as ARC HS38). > + TIMER0 serves as clockevent while TIMER1 provides clocksource > + > +config ARC_TIMERS_64BIT > + bool "Support for 64-bit counters in ARC HS38 cores" if COMPILE_TEST > + depends on GENERIC_CLOCKEVENTS > + select CLKSRC_OF > + help > + This enables 2 different 64-bit timers: RTC (for UP) and GFRC (for > SMP) > + RTC is implemented inside the core, while GFRC sits outside the core > in > + ARConnect IP block. Driver automatically picks one of them for > clocksource > + as appropriate. > + > config ARM_ARCH_TIMER > bool > select CLKSRC_OF if OF > diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile > index cf87f407f1ad..a14111e1f087 100644 > --- a/drivers/clocksource/Makefile > +++ b/drivers/clocksource/Makefile > @@ -51,6 +51,7 @@ obj-$(CONFIG_CLKSRC_TI_32K) += timer-ti-32k.o > obj-$(CONFIG_CLKSRC_NPS) += timer-nps.o > obj-$(CONFIG_OXNAS_RPS_TIMER) += timer-oxnas-rps.o > > +obj-$(CONFIG_ARC_TIMERS) += arc_timer.o I don't see arc_timer.o compiled if ARC_TIMERS_64BIT only is set. Wouldn't make sense to fold ARC_TIMERS and ARC_TIMERS_64BIT ? _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
