linux-kernel - Re: [PATCH 0/4] Add support for Exynos clock output configuration

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Message-ID: <CAD8Lp46pFGWSA6c1r-xGUbNDkcACyZZkru+m7+xH+BQRr7ULPg@mail.gmail.com>
Date:	Wed, 18 Jun 2014 17:17:19 +0100
From:	Daniel Drake <drake@...lessm.com>
To:	Tomasz Figa <t.figa@...sung.com>
Cc:	Mark Rutland <mark.rutland@....com>, devicetree@...r.kernel.org,
	Kukjin Kim <kgene.kim@...sung.com>,
	Mike Turquette <mturquette@...aro.org>,
	Pankaj Dubey <pankaj.dubey@...sung.com>,
	Rahul Sharma <rahul.sharma@...sung.com>,
	linux-kernel@...r.kernel.org, Tomasz Figa <tomasz.figa@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Mark Brown <broonie@...nel.org>,
	Tushar Behera <tushar.behera@...aro.org>,
	linux-arm-kernel@...ts.infradead.org,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>
Subject: Re: [PATCH 0/4] Add support for Exynos clock output configuration

Hi Tomasz,

On Tue, May 20, 2014 at 5:43 PM, Tomasz Figa <t.figa@...sung.com> wrote:
> Since the block responsible for handling the pin is PMU, not CMU,
> a separate driver, that binds to PMU node is required and acquires
> all input clocks by standard DT clock look-up. This way we don't need
> any cross-IP block drivers and cross-driver register sharing or
> nodes for fake devices.
>
> To represent the PMU mux/gate clock, generic composite clock is registered.
>
> Tested on Odroid U3, with HSIC/USB hub using CLKOUT as reference clock,
> with some additional patches.
>
> Depends on:
> [PATCHv5 0/4] Enable usbphy and hsotg for exynos4
> (No link, sorry, I could not find it in any archive yet...)
> for Exynos4210/4x12 PMU binding and DT nodes.

This isn't working for me.
Testing linus master e99cfa2d0634881b8a41d56c48b5956b9a3ba162 plus:
    ARM: dts: exynos4: add port sub-nodes to exynos usb host modules
    ARM: dts: exynos4412-odroidx: enable common hardware blocks
    ARM: dts: exynos4412-odroidx: add support for USB (phy, host, device)
    ARM: dts: refactor Odroid DTS file and add support for Odroid X2 and U2/U3

Testing on ODROID-U2.

I apply the first patch here (clk: samsung: exynos4: Add missing
CPU/DMC clock hierarchy) and things continue to work. Now when I add
the second patch "clk: samsung: exynos4: Add CLKOUT clock hierarchy"
boot hangs at:

[    4.753740] s3c-rtc 10070000.rtc: setting system clock to
2000-01-01 02:43:30 UTC (946694610)
[    4.753809] ### dt-test ### No testcase data in device tree; not
running tests
[    4.791155] gps-power-domain: Power-off latency e

Any ideas?
Thanks
Daniel
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