From mboxrd@z Thu Jan 1 00:00:00 1970 From: andrew@lunn.ch (Andrew Lunn) Date: Mon, 19 Oct 2015 17:15:50 +0200 Subject: [PATCH] clocksource; armada-370: implement ARM delay timer In-Reply-To: References: Message-ID: <20151019151550.GF26387@lunn.ch> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, Oct 19, 2015 at 04:03:31PM +0100, 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 +++++++++++++ > 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 > select ARCH_WANT_IPC_PARSE_VERSION > select BUILDTIME_EXTABLE_SORT if MMU > select CLONE_BACKWARDS Hi Russell Does this hunk belong in the patch? Thanks Andrew