From: Rob Herring <robh@kernel.org>
To: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Linus Walleij <linus.walleij@linaro.org>
Subject: [PATCH] clocksource: versatile: Allow CONFIG_CLKSRC_VERSATILE to be disabled
Date: Fri, 17 Apr 2020 16:20:45 -0500 [thread overview]
Message-ID: <20200417212045.16917-1-robh@kernel.org> (raw)
The timer-versatile driver provides a sched_clock for certain Arm Ltd.
reference platforms. Specifically, it is used on Versatile and 32-bit
VExpress. It is not needed for those platforms with an arch timer (all
the 64-bit ones) yet CONFIG_MFD_VEXPRESS_SYSREG does still need to be
enabled. In that case, the timer-versatile can only be disabled when
COMPILE_TEST is enabled which is not desirable. Let's use the sub-arch
kconfig symbols instead.
Realview platforms don't have the sysregs that this driver uses so
correct the help text.
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
---
This is part of a larger effort to modularize Versatile Express support,
but this change doesn't have any dependency, so it can be applied
independently.
Rob
drivers/clocksource/Kconfig | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index f2142e6bbea3..679b35fc07a8 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -562,12 +562,11 @@ config CLKSRC_VERSATILE
bool "ARM Versatile (Express) reference platforms clock source" if COMPILE_TEST
depends on GENERIC_SCHED_CLOCK && !ARCH_USES_GETTIMEOFFSET
select TIMER_OF
- default y if MFD_VEXPRESS_SYSREG
+ default y if (ARCH_VEXPRESS || ARCH_VERSATILE) && ARM
help
This option enables clock source based on free running
counter available in the "System Registers" block of
- ARM Versatile, RealView and Versatile Express reference
- platforms.
+ ARM Versatile and Versatile Express reference platforms.
config CLKSRC_MIPS_GIC
bool
--
2.20.1
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next reply other threads:[~2020-04-17 21:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-17 21:20 Rob Herring [this message]
2020-04-17 23:37 ` [PATCH] clocksource: versatile: Allow CONFIG_CLKSRC_VERSATILE to be disabled Linus Walleij
2020-04-27 9:34 ` Daniel Lezcano
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