linux-kernel - Re: [PATCH v5 0/3] Exynos 5410 support

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Date:	Thu, 12 Dec 2013 16:32:46 -0800
From:	Kevin Hilman <khilman@...aro.org>
To:	Tarek Dakhran <t.dakhran@...sung.com>
Cc:	Vyacheslav Tyrtov <v.tyrtov@...sung.com>,
	linux-kernel@...r.kernel.org,
	Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Rob Landley <rob@...dley.net>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Russell King <linux@....linux.org.uk>,
	Ben Dooks <ben-linux@...ff.org>,
	Mike Turquette <mturquette@...aro.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Heiko Stuebner <heiko@...ech.de>,
	Naour Romain <romain.naour@...nwide.fr>,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, Dave.Martin@....com,
	nicolas.pitre@...aro.org, tomasz.figa@...il.com
Subject: Re: [PATCH v5 0/3] Exynos 5410 support

Tarek Dakhran <t.dakhran@...sung.com> writes:

> On 12/10/2013 08:40 PM, Kevin Hilman wrote:
>> Vyacheslav Tyrtov <v.tyrtov@...sung.com> writes:
>>
>>> The series of patches represent support of Exynos 5410 SoC
>>>
>>> The Exynos 5410 is the first Samsung SoC based on bigLITTLE architecture
>>>
>>> Patches add new platform description, support of clock controller and device
>>> tree for Exynos 5410.
>>>
>>> Dual cluster support for Exynos 5410 (EDCS) has been removed from this series
>>> This patches is activating only the big cluster (all A15 cores)
>> Testing this series on top of v3.13-rc3, plus a couple of other
>> necessary changes (which should've probably been noted in the changelog):
>>
>> 1) change CONFIG_NR_CPUS=8 in .config
>> 2) add the exynos combiner patch from Chander:
>>     [PATCH v2] irqchip: exynos-combiner: remove hard-coded irq_base value
>>
>> I'm still only seeing 2 out of 4 cores come up on my odroid-xu:
>>
>> [    0.045000] CPU: Testing write buffer coherency: ok
>> [    0.045000] CPU0: update cpu_power 1024
>> [    0.045000] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
>> [    0.045000] Setting up static identity map for 0x403717d8 - 0x40371830
>> [    0.045000] CPU1: Booted secondary processor
>> [    0.065000] CPU1: update cpu_power 1024
>> [    0.065000] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
>> [    1.075000] CPU2: failed to boot: -38
>> [    2.075000] CPU3: failed to boot: -38
>> [    2.075000] Brought up 2 CPUs
>> [    2.075000] SMP: Total of 2 processors activated.
>> [    2.075000] CPU: All CPU(s) started in SVC mode.
>>
> Hi Kevin,
>
> EDCS(exynos dual cluster support) moved to separate patch now.
> This patches introduce only base SoC support  (2xA15).

Thanks for the clarification

I thought there were 4 A15s, and the changelog mentioned this patch
enabled "all A15s".

Kevin

> Patches tested on samsung smdk5410 board.
>
> Next version of EDCS patches will be available soon.
> They allow power on and boot all 8 cores.

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