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From: Chanho Park <chanho61.park@samsung.com>
To: 'Krzysztof Kozlowski' <k.kozlowski@samsung.com>,
	'Joonyoung Shim' <jy0922.shim@samsung.com>,
	'Kukjin Kim' <kgene@kernel.org>
Cc: cw00.choi@samsung.com, linux-samsung-soc@vger.kernel.org,
	javier.martinez@collabora.co.uk, khilman@linaro.org,
	sjoerd.simons@collabora.co.uk, heesub.shin@samsung.com,
	'Bartlomiej Zolnierkiewicz' <b.zolnierkie@samsung.com>
Subject: RE: [PATCH] ARM: dts: add exynos5422.dtsi to correct cpu order
Date: Thu, 28 May 2015 17:43:13 +0900	[thread overview]
Message-ID: <030f01d09922$55a2e120$00e8a360$@samsung.com> (raw)
In-Reply-To: <5566A7A0.4080608@samsung.com>

Hi,

> When adding new 5422 board we can split out CPU configuration to
> separate DTSI file. I already posted patches for Odroid XU3-family
> common DTSI file for XU3 Lite board:
> http://www.spinics.net/lists/linux-samsung-soc/msg44868.html

IMHO, all of the exynos5422 boards will be same cpu configurations. That's
why I added new exynos5422.dtsi.

> 
> > BTW, booting of secondary cpus are still broken. Is there any progress
> of
> > the patch[1]?
> > This patch is also generated top of the patch with some fixes.
> >
> > [1]. http://www.spinics.net/lists/linux-samsung-soc/msg39523.html
> 
> No progress so far. Apparently nobody knows why this works and what to
> do with it. I would suspect booted CPUs stuck somewhere in BL1 or BL2
> and writing to PMU_SPARE2 kicks them. However this is just a guess.
> 
> Kukjin which could be the closest person to the real knowledge (LSI) did
> not gave his feedback.
> 
> We have a lot of such hacks and undocumented interfaces between kernel
> and bootloaders. IMHO it would be good to start documenting them.

Good. But, who can do it?

Best Regards,
Chanho Park

  reply	other threads:[~2015-05-28  8:43 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-27 15:15 [PATCH] ARM: dts: add exynos5422.dtsi to correct cpu order Chanho Park
2015-05-28  1:58 ` Joonyoung Shim
2015-05-28  4:00   ` Chanho Park
2015-05-28  5:29     ` Krzysztof Kozlowski
2015-05-28  8:43       ` Chanho Park [this message]
2015-05-31  7:09         ` Krzysztof Kozlowski
2015-05-28  8:49     ` Marek Szyprowski
2015-05-28 17:19       ` Kevin Hilman

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