linux-kernel - Re: [PATCH v1 02/10] clockevents/drivers: add MPS2 Timer driver

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Message-ID: <5670129B.700@arm.com>
Date:	Tue, 15 Dec 2015 13:16:11 +0000
From:	Vladimir Murzin <vladimir.murzin@....com>
To:	Rob Herring <robh+dt@...nel.org>
CC:	Arnd Bergmann <arnd@...db.de>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>,
	Andreas Färber <afaerber@...e.de>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Mark Rutland <Mark.Rutland@....com>,
	Pawel Moll <Pawel.Moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, Jiri Slaby <jslaby@...e.cz>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
	"linux-api@...r.kernel.org" <linux-api@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 02/10] clockevents/drivers: add MPS2 Timer driver

On 14/12/15 13:56, Rob Herring wrote:
> On Wed, Dec 2, 2015 at 3:33 AM, Vladimir Murzin <vladimir.murzin@....com> wrote:
>> MPS2 platform has simple 32 bits general purpose countdown timers.
>>
>> The driver uses the first detected timer as a clocksource and the rest
>> of the timers as a clockevent
>>
>> Signed-off-by: Vladimir Murzin <vladimir.murzin@....com>
>> ---
>>  drivers/clocksource/Kconfig      |    5 +
>>  drivers/clocksource/Makefile     |    1 +
>>  drivers/clocksource/mps2-timer.c |  277 ++++++++++++++++++++++++++++++++++++++
>>  3 files changed, 283 insertions(+)
>>  create mode 100644 drivers/clocksource/mps2-timer.c
>>
>> diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
>> index 2eb5f0e..8bca09c 100644
>> --- a/drivers/clocksource/Kconfig
>> +++ b/drivers/clocksource/Kconfig
>> @@ -137,6 +137,11 @@ config CLKSRC_STM32
>>         depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)
>>         select CLKSRC_MMIO
>>
>> +config CLKSRC_MPS2
>> +       bool "Clocksource for MPS2 SoCs" if COMPILE_TEST
>> +       depends on OF && ARM
> 
> Does this really depend on both of these for COMPILE_TEST?

Not really...

> 
> You need to select CLKSRC_OF rather than CLKSRC_MMIO as well.
> 

Does it looks better?

config CLKSRC_MPS2
	bool "Clocksource for MPS2 SoCs" if COMPILE_TEST
	depends on GENERIC_SCHED_CLOCK
	select CLKSRC_MMIO
	select CLKSRC_OF


Cheers
Vladimir

> Rob
> 
> 
> 

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