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

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Date:	Mon, 15 Jun 2015 07:43:38 +0530
From:	Anand Moon <linux.amoon@...il.com>
To:	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 Krzysztof

On 15 June 2015 at 05:21, 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>
>> 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.
>
> Why did you took my email and pasted it here?
> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-May/343702.html
>
> It is written now in first person so it pretends that you wrote this.
> You are actually doing this for second time - taking my
> reply and putting into commit message or changelog. Why?
>
> And where is proper changelog?
>

Sorry: My intention was never to take credit on what your guidance and
your pointers.
I value ever input of your and try not to repeat the mistakes I am repeating.
I will send updated version soon.

-Anand Moon

> Krzysztof
>
>> ---
>>  arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi | 25 ++++++++++++++++++++++
>>  1 file changed, 25 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
>> index a2f9941..b6570fc 100644
>> --- a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
>> +++ b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
>> @@ -474,6 +474,31 @@
>>       status = "okay";
>>  };
>>
>> +&tmu_cpu0 {
>> +     vtmu-supply = <&ldo7_reg>;
>> +     status = "okay";
>> +};
>> +
>> +&tmu_cpu1 {
>> +     vtmu-supply = <&ldo7_reg>;
>> +     status = "okay";
>> +};
>> +
>> +&tmu_cpu2 {
>> +     vtmu-supply = <&ldo7_reg>;
>> +     status = "okay";
>> +};
>> +
>> +&tmu_cpu3 {
>> +     vtmu-supply = <&ldo7_reg>;
>> +     status = "okay";
>> +};
>> +
>> +&tmu_gpu {
>> +     vtmu-supply = <&ldo7_reg>;
>> +     status = "okay";
>> +};
>> +
>>  &rtc {
>>       status = "okay";
>>       clocks = <&clock CLK_RTC>, <&s2mps11_osc S2MPS11_CLK_AP>;
>>
>
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