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

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Message-ID: <5559C24D.9010701@arm.com>
Date:	Mon, 18 May 2015 11:43:25 +0100
From:	Sudeep Holla <sudeep.holla@....com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>,
	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

Hi Russell,

On 18/05/15 11:40, Russell King - ARM Linux wrote:
> 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.
>

Thanks for confirming.

Regards,
Sudeep
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