From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
To: Anand Moon <linux.amoon@gmail.com>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>,
Dongjin Kim <tobetter@gmail.com>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-samsung-soc@vger.kernel.org"
<linux-samsung-soc@vger.kernel.org>,
Russell King <linux@arm.linux.org.uk>,
Lukasz Majewski <l.majewski@samsung.com>,
Eduardo Valentin <edubezval@gmail.com>,
Sjoerd Simons <sjoerd.simons@collabora.co.uk>,
Kukjin Kim <kgene@kernel.org>, Guenter Roeck <linux@roeck-us.net>,
Markus Reichl <m.reichl@fivetechno.de>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCHv5 2/5] ARM: dts: Odroid-XU3 Enable TMU at Exynos5422 base
Date: Sun, 24 May 2015 13:33:38 +0900 [thread overview]
Message-ID: <CAJKOXPcQBVaaS+32GYpyQHQ3m_EZYqu0noXtpp_FVBEaGyUgGw@mail.gmail.com> (raw)
In-Reply-To: <CANAwSgQzYvmquo9fcUPLK5XHqo1G=HYHc-YuhUvtw2yYaDi9GA@mail.gmail.com>
2015-05-24 2:35 GMT+09:00 Anand Moon <linux.amoon@gmail.com>:
> Hi Krzysztof,
>
> I did some debugging on the this using powerdebug utility.
> Using LDO7 to control TMU seams to me correct option compared to BUCK3.
>
> Setting LDO7 to control TMU I observed following output on powerdebug.
> I observed that the power drawn by the board on Odroid show is much
> less compare to BUCK3 on the same setup.
> I can see the HDMI output on Odroid-V2 display screen.
> I have done some stress testing on this configuration and It worked correctly.
>
> Powerdebug output using LDO7
> ---------------------------------------------------------------------------------------------------------------
> PowerDebug 0.7.3 Clocks Regulators Sensors Gpio
> Name Status State Type Users Microvolts
> Min u-volts Max u-volts
> phy 0 0
> 0 0
> phy 0 0
> 0 0
> vdd_ldo1 enabled voltage 0 1000000
> 1000000 1000000
> LDO1 0 0
> 0 0
> LDO2 enabled voltage 0 1800000
> 0 0
> vdd_ldo3 enabled voltage 0 1800000
> 1800000 1800000
> LDO3 0 0
> 0 0
> LDO4 enabled voltage 0 1800000
> 0 0
> vdd_ldo5 enabled voltage 0 1800000
> 1800000 1800000
> LDO5 0 0
> 0 0
> vdd_ldo6 enabled voltage 0 1000000
> 1000000 1000000
> hdmi okay 0 0
> 0 0
> hdmi okay 0 0
> 0 0
> LDO6 0 0
> 0 0
> vdd_ldo7 enabled voltage 0 1800000
> 1800000 1800000
> hdmi okay 0 0
> 0 0
> tmu okay 0 0
> 0 0
> tmu okay 0 0
> 0 0
> tmu okay 0 0
> 0 0
> tmu okay 0 0
> 0 0
> tmu okay 0 0
> 0 0
> LDO7 0 0
> 0 0
> vdd_ldo8 enabled voltage 0 1800000
> 1800000 1800000
> LDO8 0 0
> 0 0
> vdd_ldo9 enabled voltage 0 3000000
> 3000000 3000000
> LDO9 0 0
> 0 0
>
> Powerdebug output using BUCK3.
> --------------------------------------------------------------------------------------------------------------------------
> PowerDebug 0.7.3 Clocks Regulators Sensors Gpio
> Name Status State Type Users Microvolts
> Min u-volts Max u-volts
> LDO21 disabled voltage 0 1800000
> 0 0
> LDO22 disabled voltage 0 1200000
> 0 0
> LDO23 enabled voltage 0 1100000
> 0 0
> tsp_io enabled voltage 0 2800000
> 2800000 2800000
> LDO24 0 0
> 0 0
> LDO25 disabled voltage 0 1800000
> 0 0
> vdd_ldo26 enabled voltage 0 3000000
> 3000000 3000000
> LDO26 0 0
> 0 0
> LDO27 enabled voltage 0 1000000
> 0 0
> LDO28 disabled voltage 0 3300000
> 0 0
> LDO29 disabled voltage 0 1800000
> 0 0
> LDO30 disabled voltage 0 1800000
> 0 0
> LDO31 disabled voltage 0 1800000
> 0 0
> LDO32 disabled voltage 0 1800000
> 0 0
> LDO33 disabled voltage 0 1800000
> 0 0
> LDO34 disabled voltage 0 3000000
> 0 0
> LDO35 disabled voltage 0 1600000
> 0 0
> LDO36 disabled voltage 0 1800000
> 0 0
> LDO37 disabled voltage 0 1800000
> 0 0
> LDO38 disabled voltage 0 2800000
> 0 0
> vdd_mif enabled voltage 0 1100000
> 800000 1300000
> BUCK1 0 0
> 0 0
> vdd_arm enabled voltage 0 1000000
> 800000 1500000
> BUCK2 0 0
> 0 0
> vdd_int enabled voltage 0 1000000
> 800000 1400000
> tmu okay 0 0
> 0 0
> tmu okay 0 0
> 0 0
> tmu okay 0 0
> 0 0
> tmu okay 0 0
> 0 0
> tmu okay 0 0
> 0 0
> BUCK3 0 0
> 0 0
> vdd_g3d enabled voltage 0 1000000
> 800000 1400000
> BUCK4 0 0
> 0 0
> vdd_mem enabled voltage 0 1200000
> 800000 1400000
> BUCK5 0 0
> 0 0
> vdd_kfc enabled voltage 0 1025000
> 800000 1500000
>
> So I would like to go with LDO7.
>
> Please share your thoughts.
I don't understand how grepping through /sys/class/regulator helps in
making this decision. I just don't get it. Can you please explain it
to me?
Best regards,
Krzysztof
next prev parent reply other threads:[~2015-05-24 4:33 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-13 6:36 v5 Exynos5422 odroidxu3 pwm-fan control using thermal sensors Anand Moon
2015-05-13 6:36 ` [PATCHv5 1/5] ARM: dts: exynos5422-odroidxu3 Add pwm-fan node to the Odroid-XU3 board Anand Moon
2015-05-13 7:11 ` Krzysztof Kozlowski
[not found] ` <CAJKOXPefJwqvfZPDovQ6EjEOBfuJkidgeYDF_=KC9O+=2=_KoQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-05-13 7:46 ` Anand Moon
2015-06-14 5:31 ` Krzysztof Kozlowski
2015-06-14 5:35 ` Anand Moon
2015-05-13 8:17 ` [PATCHv5 1/5] ARM: dts: exynos5422-odroidxu3 Add pwm-fan node tothe " Kukjin Kim
2015-05-13 6:36 ` [PATCHv5 2/5] ARM: dts: Odroid-XU3 Enable TMU at Exynos5422 base Anand Moon
[not found] ` <1431499020-3912-3-git-send-email-linux.amoon-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-05-13 7:21 ` Krzysztof Kozlowski
2015-05-13 8:21 ` Anand Moon
2015-05-13 8:32 ` Krzysztof Kozlowski
[not found] ` <CAJKOXPfC9nGEsYJ3qJ6m_iMsB=D8_6sOEpLQzEvmLry5zS5j3g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-05-13 8:45 ` Anand Moon
2015-05-14 16:16 ` Anand Moon
2015-05-15 0:12 ` Krzysztof Kozlowski
[not found] ` <CAJKOXPd_1rTZZCz66nQKidUOOEBmgUD+05fHUBvXN-VuD5mTCw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-05-15 1:36 ` Anand Moon
2015-05-19 7:28 ` Anand Moon
[not found] ` <CANAwSgTbjmSxhJj4o2pnD5pR2V9JbQ3az+TSSCDwgwNnvF7P9w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-05-19 7:42 ` Krzysztof Kozlowski
[not found] ` <CADoNuNfuDCn_vvACc0=xj0MjdKr4pYcj_-Xh0--Q8_qciuW5YA@mail.gmail.com>
2015-05-20 14:59 ` Anand Moon
2015-05-21 0:03 ` Krzysztof Kozlowski
2015-05-23 17:35 ` Anand Moon
2015-05-24 4:33 ` Krzysztof Kozlowski [this message]
2015-05-24 5:19 ` Anand Moon
2015-05-13 6:36 ` [PATCHv5 3/5] ARM: dts: define default thermal-zones for exynos5422 Anand Moon
2015-05-13 7:23 ` Krzysztof Kozlowski
[not found] ` <CAJKOXPerF9xgGzFuU+HC_9QaOAAMkoQo2DxH0Y=NwLJ7TMWH0A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-05-13 8:02 ` Krzysztof Kozlowski
2015-05-13 13:16 ` Lukasz Majewski
2015-05-13 6:36 ` [PATCHv5 4/5] ARM: dts: exynos5420 update the cooling cells for core cpu0 Anand Moon
2015-05-13 7:31 ` Krzysztof Kozlowski
2015-05-13 7:58 ` Anand Moon
2015-05-13 8:05 ` Krzysztof Kozlowski
2015-05-13 10:07 ` Anand Moon
[not found] ` <CANAwSgTdQk6BGD4xxB6k=p=YOV+CHv_+Q_bSyrxiPsdXVps92g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-05-13 10:12 ` Krzysztof Kozlowski
2015-05-13 11:01 ` Anand Moon
2015-05-13 6:37 ` [PATCHv5 5/5] ARM: dts: Enable thermal_zone for exynos5422-odroidxu3 Anand Moon
2015-05-13 7:40 ` Krzysztof Kozlowski
2015-05-13 8:39 ` Anand Moon
2015-05-13 10:05 ` Krzysztof Kozlowski
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