From: swarren@wwwdotorg•org (Stephen Warren)
To: linux-arm-kernel@lists•infradead.org
Subject: [RFC PATCH 8/9] ARM: dt: t30 cardhu: add dt entry for thermal driver
Date: Wed, 20 Feb 2013 10:18:37 -0700 [thread overview]
Message-ID: <5125056D.7060608@wwwdotorg.org> (raw)
In-Reply-To: <5124B934.3020900@nvidia.com>
On 02/20/2013 04:53 AM, Wei Ni wrote:
> On 02/20/2013 07:28 AM, Stephen Warren wrote:
>> On 02/18/2013 04:30 AM, Wei Ni wrote:
>>> Enable thermal driver in the dts file.
>>> Set sensor as lm90 remote sensor, and set throttle data.
>>
>>> diff --git a/Documentation/devicetree/bindings/thermal/tegra3-thermal.txt b/Documentation/devicetree/bindings/thermal/tegra3-thermal.txt
>> Also, what units are used for all these properties?
>
> they use "int".
> And according to our downstream dvfs driver, the throttle table use
> "unsigned long".
int and unsigned long are types, not units. Units means degrees C vs.
degrees F vs. degrees K, or Hz vs. KHz vs. MHz, etc.
>> Judging by the example below, this property is a list of tuples. The
>> meaning of each field in the tuple needs to be explained.
>>
>> What happens when the CPU/SoC needs to be throttled? Must some clock or
>> voltage be lowered/limited? If so, you need properties that indicate
>> which clock/voltage/... needs to be acted upon.
>
> This table which will be used by our DVFS driver, although it didn't be
> upstreamed yet. The table set clock frequency limited value with
> different cooling state. When the temperature touch the different
> limited value, we will set difficult cooling state, find the limited
> freq from this table and pass to the dvfs driver.
> I think may be this table should be set for cooling device node. This
> table is only for our tegra dvfs, so I think we can parse this table in
> the tegra3_cooling.c, which will be the new driver for cooling device.
Note that I expect the answers to these questions (pretty much all the
questions I asked in response to your patch) to be included in the DT
binding documentation, not just in email.
next prev parent reply other threads:[~2013-02-20 17:18 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-18 11:30 [RFC PATCH 0/9] Support for tegra30 thermal Wei Ni
2013-02-18 11:30 ` [RFC PATCH 1/9] ARM: dt: t30 cardhu: add dt entry for lm90 Wei Ni
2013-02-19 3:28 ` Alex Courbot
2013-02-19 9:52 ` Wei Ni
2013-02-19 22:48 ` Stephen Warren
2013-02-18 11:30 ` [RFC PATCH 2/9] hwmon: (lm90) split set&show temp as common codes Wei Ni
2013-02-18 22:29 ` Matthew Longnecker
2013-02-19 9:48 ` Wei Ni
2013-02-19 3:31 ` [lm-sensors] " Guenter Roeck
2013-02-19 10:00 ` Wei Ni
2013-02-19 22:56 ` Stephen Warren
2013-02-20 12:31 ` Wei Ni
2013-02-18 11:30 ` [RFC PATCH 3/9] hwmon: (lm90) add support to handle irq Wei Ni
2013-02-19 3:34 ` [lm-sensors] " Guenter Roeck
2013-02-19 10:43 ` Wei Ni
2013-02-19 23:00 ` Stephen Warren
2013-02-20 3:27 ` Alex Courbot
2013-02-20 10:27 ` Wei Ni
2013-02-18 11:30 ` [RFC PATCH 4/9] hwmon: (lm90) use macros for the indexes of temp8 and temp11 Wei Ni
2013-02-19 5:39 ` Alex Courbot
2013-02-19 9:58 ` Wei Ni
2013-02-19 23:02 ` Stephen Warren
2013-02-20 10:29 ` Wei Ni
2013-02-18 11:30 ` [RFC PATCH 5/9] Thermal: Support using dt node to get sensor Wei Ni
2013-02-19 23:12 ` Stephen Warren
2013-02-20 10:36 ` Wei Ni
2013-02-18 11:30 ` [RFC PATCH 6/9] hwmon: (lm90) Register to the thermal framework Wei Ni
2013-02-19 3:42 ` [lm-sensors] " Guenter Roeck
2013-02-19 10:47 ` Wei Ni
2013-02-19 5:22 ` Alex Courbot
2013-02-19 10:58 ` Wei Ni
2013-02-19 23:18 ` Stephen Warren
2013-02-20 10:40 ` Wei Ni
2013-02-18 11:30 ` [RFC PATCH 7/9] thermal: tegra30: add tegra30 thermal driver Wei Ni
2013-02-19 23:48 ` Stephen Warren
2013-02-20 12:23 ` Wei Ni
2013-02-19 23:56 ` Russell King - ARM Linux
2013-02-20 12:29 ` Wei Ni
2013-02-18 11:30 ` [RFC PATCH 8/9] ARM: dt: t30 cardhu: add dt entry for " Wei Ni
2013-02-19 3:42 ` Alex Courbot
2013-02-19 9:56 ` Wei Ni
2013-02-19 23:28 ` Stephen Warren
2013-02-20 11:53 ` Wei Ni
2013-02-20 17:18 ` Stephen Warren [this message]
2013-02-18 11:30 ` [RFC PATCH 9/9] ARM: tegra: defconfig: enable thermal framework Wei Ni
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