From mboxrd@z Thu Jan 1 00:00:00 1970 From: u.kleine-koenig@pengutronix.de (Uwe =?iso-8859-1?Q?Kleine-K=F6nig?=) Date: Fri, 20 Feb 2015 20:54:37 +0100 Subject: [PATCH v2 04/18] clocksource: Add ARM System timer driver In-Reply-To: <1424455277-29983-5-git-send-email-mcoquelin.stm32@gmail.com> References: <1424455277-29983-1-git-send-email-mcoquelin.stm32@gmail.com> <1424455277-29983-5-git-send-email-mcoquelin.stm32@gmail.com> Message-ID: <20150220195437.GT19388@pengutronix.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hello, On Fri, Feb 20, 2015 at 07:01:03PM +0100, Maxime Coquelin wrote: > This patch adds clocksource support for ARMv7-M's System timer, > also known as SysTick. > > Signed-off-by: Maxime Coquelin > --- > drivers/clocksource/Kconfig | 7 ++++ > drivers/clocksource/Makefile | 1 + > drivers/clocksource/armv7m_systick.c | 78 ++++++++++++++++++++++++++++++++++++ > 3 files changed, 86 insertions(+) > create mode 100644 drivers/clocksource/armv7m_systick.c > > diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig > index fc01ec2..fb6011e 100644 > --- a/drivers/clocksource/Kconfig > +++ b/drivers/clocksource/Kconfig > @@ -124,6 +124,13 @@ config CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK > help > Use ARM global timer clock source as sched_clock > > +config ARMV7M_SYSTICK > + bool I assume this symbol is enabled later in the series. Would it make sense to allow enabing the symbol for compile test coverage? > + select CLKSRC_OF if OF What happens if ARMV7M_SYSTICK=y but OF=n? Doesn't the driver fail to compile? > + select CLKSRC_MMIO > + help > + This options enables support for the ARMv7M system timer unit the right spelling is ARMv7-M. Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-K?nig | Industrial Linux Solutions | http://www.pengutronix.de/ |