linux-kernel - Re: [PATCH V3 00/11] Add T210 support in Tegra soctherm

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Date:	Fri, 22 Jan 2016 15:27:49 +0800
From:	Wei Ni <wni@...dia.com>
To:	Thierry Reding <thierry.reding@...il.com>
CC:	<rui.zhang@...el.com>, <MLongnecker@...dia.com>,
	<swarren@...dotorg.org>, <mikko.perttunen@...si.fi>,
	<linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V3 00/11] Add T210 support in Tegra soctherm



On 2016年01月21日 22:56, Thierry Reding wrote:
> * PGP Signed by an unknown key
> 
> On Mon, Jan 18, 2016 at 06:02:25PM +0800, Wei Ni wrote:
>> This patchset adds following functions for tegra_soctherm driver:
>> 1. add T210 support.
>> 2. export debugfs to show some registers.
>> 3. add thermtrip funciton.
>> 4. add suspend/resume function.
>>
>> The V1 serial is in:
>> http://www.spinics.net/lists/linux-tegra/msg24808.html
>> The V2 serial is in:
>> http://www.spinics.net/lists/linux-tegra/msg24901.html
>>
>> Main changes from V2:
>> 1. Fix build error in patch [1/11].
>> 2. Use of_get_child_by_name instead of of_find_node_by_name in patch [8/11].
>> 3. Use debugfs_remove_recursive to remove debugfs in patch [6/11].
>>
>> Main changes from V1:
>> 1. Use the new type to handl different Tegra chips in one driver,
>> which suggested by Thierry.
>> 2. Changes per Thieery's other comments.
>>
>> Wei Ni (11):
>>   thermal: tegra: move tegra thermal files into tegra directory
>>   thermal: tegra: combine sensor group-related data
>>   thermal: tegra: get rid of PDIV/HOTSPOT hack
>>   thermal: tegra: split tegra_soctherm driver
>>   thermal: tegra: add T210-specific SOC_THERM driver
>>   thermal: tegra: add a debugfs to show registers
>>   of: Add bindings of hw-trips for soctherm
>>   thermal: tegra: add thermtrip function
>>   thermal: tegra: add PM support
>>   arm64: tegra: add soctherm node for Tegra210
>>   ARM: tegra: set hw trips for Tegra124
> 
> Hi Wei,
> 
> This series looks mostly good to me. I've commented on a couple of minor
> things as replies to the individual patches.

Thanks for your review, I will check your comments and send out next version in
next few days.

> 
> On a higher level, what's the test procedure that we can use to validate
> that this code works?

You can check following files:
1. Run "cat /sys/class/thermal/thermal*/temp" to read temperature
This driver will register four thermal zones: cpu, gpu, mem and pll.
2. Run "cat /sys/kernel/debug/tegra_soctherm/regs" to show the register contents.
3. Write a low temperature value to
/sys/kernel/debug/tegra_soctherm/thermtrip/xxx to trigger the thermtrip function.
For example, if the cpu temperature is 30000 now, you can read it from above
thermal zones, then "echo 25000 >
/sys/kernel/debug/tegra_soctherm/thermtrip/cpu", the system will be shutdown
immediately.

> 
> Thierry
> 
> * Unknown Key
> * 0x7F3EB3A1
>