linux-kernel - Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

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Date:	Fri, 08 May 2015 12:09:57 +0200
From:	Paul Bolle <pebolle@...cali.nl>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kernel@...inux.com, devicetree@...r.kernel.org,
	daniel.lezcano@...aro.org, tglx@...utronix.de, wim@...ana.be,
	a.zummo@...ertech.it, linux-watchdog@...r.kernel.org,
	rtc-linux@...glegroups.com, linux@...ck-us.net
Subject: Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC
 Clocksource IP

On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig

> +config CLKSRC_ST_LPC
> +	bool
> +	depends on ARCH_STI

By itself this does nothing. You can't set this symbol to 'y', even if
ARCH_STI is 'y', right? Of course, ARCH_STI will select this symbol (see
11/12) otherwise it would be inert. But as ARCH_STI selects
CLKSRC_ST_LPC I'd say this dependency isn't actually needed.

Are other selects of CLKSRC_ST_LPC expected to be added in the future?
If not, CLKSRC_ST_LPC should operate in lockstep with ARCH_STI. In that
case you might as well not bother with CLKSRC_ST_LPC and use ARCH_STI
directly. (But that forces you to move the select statement below into
the ARCH_STI entry, which might be ugly.)

> +	select CLKSRC_OF if OF
> +	help
> +	  Enable this option to use the Low Power controller timer
> +	  as clocksource.

(Please add an empty line.)

>  endmenu

Thanks,

Paul Bolle

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