[PATCH v2 04/18] clocksource: Add ARM System timer driver
From: Uwe Kleine-König <hidden>
Date: 2015-02-20 19:55:27
Also in:
linux-api, linux-arch, linux-devicetree, linux-gpio, linux-serial, lkml
Hello, On Fri, Feb 20, 2015 at 07:01:03PM +0100, Maxime Coquelin wrote:
quoted hunk ↗ jump to hunk
This patch adds clocksource support for ARMv7-M's System timer, also known as SysTick. Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com> --- 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.cdiff --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/ |