linux-kernel - Re: [PATCH 1/2] ARM: simplify timer initialisation and remove arm

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Message-ID: <20150518104043.GS2067@n2100.arm.linux.org.uk>
Date:	Mon, 18 May 2015 11:40:43 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Rob Herring <robh@...nel.org>
Cc:	Sudeep Holla <sudeep.holla@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>
Subject: Re: [PATCH 1/2] ARM: simplify timer initialisation and remove
 arm_timer.h inclusion

On Thu, Apr 30, 2015 at 09:09:47AM -0500, Rob Herring wrote:
> On Thu, Apr 30, 2015 at 5:44 AM, Sudeep Holla <sudeep.holla@....com> wrote:
> > The header asm/hardware/arm_timer.h is included in various machine
> > specific files to access TIMER_CTRL and initialise to a known state.
> > However that's not required as the clock{source,event} driver timer-sp
> > initialises all the timer being used.
> 
> I believe the idea is not to initialize the timers being used, but the
> ones not being used and perhaps left running by the bootloader. Cases
> where the interrupt is shared could cause a problem.

Exactly.  IMHO this code needs to stay.

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