linux-kernel - Re: [PATCH v2 3/6] clocksource/drivers: atmel-pit: allow unselecting ATMEL

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Message-ID: <20180107184455.GG5545@piout.net>
Date:   Sun, 7 Jan 2018 19:44:55 +0100
From:   Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/6] clocksource/drivers: atmel-pit: allow unselecting
 ATMEL_PIT

On 07/01/2018 at 19:07:13 +0100, Daniel Lezcano wrote:
> On 05/01/2018 15:30, Alexandre Belloni wrote:
> > With the new TCB clocksource driver, atmel platforms are now able to boot
> > without the PIT driver. Allow unselecting it.
> > 
> > Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
> > ---
> >  drivers/clocksource/Kconfig | 9 ++++++++-
> >  1 file changed, 8 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> > index 5609572e0236..55ccfa0ba63b 100644
> > --- a/drivers/clocksource/Kconfig
> > +++ b/drivers/clocksource/Kconfig
> > @@ -381,7 +381,14 @@ config ARMV7M_SYSTICK
> >  
> >  config ATMEL_PIT
> >  	select TIMER_OF if OF
> > -	def_bool SOC_AT91SAM9 || SOC_SAMA5
> > +	bool "Atmel Periodic Interval Timer (PIT)"
> > +	depends on SOC_AT91SAM9 || SOC_SAMA5
> > +	default SOC_AT91SAM9 || SOC_SAMA5
> > +	help
> > +	  Select this to get a clocksource based on the Atmel Periodic Interval
> > +	  Timer. It has a relatively low resolution and the TC Block clocksource
> > +	  should be preferred.
> > +	  It also provides a clock event device.
> 
> Please conform to the format:
> 
> config ATMEL_PIT
> 	bool "Atmel Periodic Interval Timer (PIT)" if COMPILE_TEST
> 	select ...
> 	help
> 	    bla bla
> 
> and select ATMEL_PIT from the platform's Kconfig.
> 

Well, the goal is actually to allow people to unselect it so we don't
want the platform to select it.


-- 
Alexandre Belloni, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com