From mboxrd@z Thu Jan 1 00:00:00 1970 From: gregory.clement@free-electrons.com (Gregory CLEMENT) Date: Mon, 19 Oct 2015 17:19:24 +0200 Subject: [PATCH] clocksource; armada-370: implement ARM delay timer In-Reply-To: (Russell King's message of "Mon, 19 Oct 2015 16:03:31 +0100") References: Message-ID: <874mhmga2r.fsf@free-electrons.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Russell, On lun., oct. 19 2015, Russell King wrote: > Implement an ARM delay timer to be used for udelay() on Armada 37x > platforms. This allows us to skip the delay loop calibration at boot, > saving 180ms on the boot time of the kernel (which is around 10%). > > It also means that udelay() will be unaffected by CPU frequency changes > when cpufreq is enabled on these platforms. > > Signed-off-by: Russell King > --- > arch/arm/Kconfig | 1 + > arch/arm/plat-orion/time.c | 13 +++++++++++++ You spoke only about the armada37x but you also modified the timer of the orion platforms. Could you split your patch in two part? Then the arch/arm/plat-orion/time.c related part would be applied through the mvebu tree and the drivers/clocksource/time-armada-370-xp.c through the clocksource tree. > drivers/clocksource/time-armada-370-xp.c | 14 ++++++++++++++ > 3 files changed, 28 insertions(+) > > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > index f3dfca632a8a..194569c23271 100644 > --- a/arch/arm/Kconfig > +++ b/arch/arm/Kconfig > @@ -10,6 +10,7 @@ config ARM > select ARCH_SUPPORTS_ATOMIC_RMW > select ARCH_USE_BUILTIN_BSWAP > select ARCH_USE_CMPXCHG_LOCKREF > + select ARCH_WANT_FRAME_POINTERS Is it related to this patch? Thanks, Gregory > select ARCH_WANT_IPC_PARSE_VERSION > select BUILDTIME_EXTABLE_SORT if MMU > select CLONE_BACKWARDS -- Gregory Clement, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com