linux-kernel - Re: [PATCHv6 2/4] ARM: dts: exynos5422-odroidxu3: Enable TMU at Exynos5422 base

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Message-ID: <557E8FA7.1090200@fivetechno.de>
Date:	Mon, 15 Jun 2015 10:41:11 +0200
From:	Markus Reichl <m.reichl@...etechno.de>
To:	Anand Moon <linux.amoon@...il.com>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>
CC:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	Kukjin Kim <kgene@...nel.org>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCHv6 2/4] ARM: dts: exynos5422-odroidxu3: Enable TMU at Exynos5422
 base

Hi Anand, Krzysztof

Am 15.06.2015 um 04:23 schrieb Anand Moon:
> hi Krzysztof
> 
> On 15 June 2015 at 05:41, Krzysztof Kozlowski <k.kozlowski@...sung.com> wrote:
>> On 14.06.2015 19:24, Anand Moon wrote:
>>> This changes enables TMU IP block on the Exynos5422 Odroid-XU3
>>> device.
>>>
>>> Signed-off-by: Anand Moon <linux.amoon@...il.com>
>>> Tested-by: Markus Reichl <m.reichl@...etechno.de>
>>
>> This does not look right.
>> You put this "Tested-by" since beginning of this patchset (v1) but first
>> it was LDO10. Then you proposed LDO18 and now you use LDO7 from my
>> suggestion. Which of this was tested by Markus because I cannot find his
>> emails with it on LKML?
> 
> Markus Reichl tested the earlier version with LDO10.

This is right.

> Commit logs got carry forward by mistake.
> 
> -Anand Moon
> 
>>
>> Krzysztof
>>
>>> Acked-by: Lukasz Majewski <l.majewski@...sung.com>
>>> ---
>>> Changes rebase on git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung branch for-next
>>> Changes from v5: Use LDO7 regulator instead of LD010.
>>>
>>> The output of LDO18 goes to VDD_EMMC_1V8. This is not regulator for TMU.
>>>
>>> I think the schematics are missing some of details but it can be deducted that:
>>> 1. TEMP SE is supplied by VDD18_TS power domain. It consists of 5
>>> pairs of pins (XTSTEST_OUT[0-4], XTSEXT_RES[0-4]).
>>> 2. The VDD18_TS01, VDD18_TS23 and VDD18_TS4 are wired to the LDO7 of
>>> S2MPS11 PMIC.
>>> 3. I confirmed with the Exynos5422 datasheet that these
>>> VDD18_TS{01,23,4} supply the XTSTEST pins (OUT and RES).
>>>
>>> So the LDO7 it is... but before using it there is a caveat. The LDO7
>>> is also connected to VDD of MIPI, HDMI and few more. So when you use
>>> this regulator in TMU it may be turned off by TMU driver (e.g. during
>>> unbind). In such case these other blocks also should be tested and
>>> checked whether they take this regulator and enable it.
>>> ---
>>>  arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi | 25 ++++++++++++++++++++++
>>>  1 file changed, 25 insertions(+)
>>
> 
> 


-- 
Markus Reichl
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