linux-kernel - Re: [PATCHv3 0/8] Thermal Framework Enhancements

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Date:	Fri, 30 Aug 2013 08:34:18 -0400
From:	Eduardo Valentin <eduardo.valentin@...com>
To:	"R, Durgadoss" <durgadoss.r@...el.com>
CC:	Eduardo Valentin <eduardo.valentin@...com>,
	"Zhang, Rui" <rui.zhang@...el.com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"hongbo.zhang@...aro.org" <hongbo.zhang@...aro.org>,
	"wni@...dia.com" <wni@...dia.com>
Subject: Re: [PATCHv3 0/8] Thermal Framework Enhancements

On 30-08-2013 05:20, R, Durgadoss wrote:
> Hi Eduardo,
> 
>> -----Original Message-----
>> From: Eduardo Valentin [mailto:eduardo.valentin@...com]
>> Sent: Friday, August 30, 2013 1:08 AM
>> To: R, Durgadoss
>> Cc: Zhang, Rui; linux-pm@...r.kernel.org; linux-kernel@...r.kernel.org;
>> eduardo.valentin@...com; hongbo.zhang@...aro.org; wni@...dia.com
>> Subject: Re: [PATCHv3 0/8] Thermal Framework Enhancements
>>
>> Durga,
>>
>> On 05-02-2013 06:46, Durgadoss R wrote:
>>> This patch set is a v3 of the previous versions submitted here:
>>> [v2]: http://lwn.net/Articles/531720/
>>> [v1]: https://lkml.org/lkml/2012/12/18/108
>>> [RFC]:https://patchwork.kernel.org/patch/1758921/
>>>
>>
>> Long time this work is not moving forward. While writing the device tree
> 
> I am trying my best to get to this,
> Will try to refresh in a couple of weeks.
> 
>> parser, I thought of using your work as baseline to see how the multiple
>> sensor per zone would look like (also in DT).
>>
>> But while checking your code again, I realized that you are actually
>> creating a new API, that is probably why you named it sysfs-api2. While
>> I understand the motivation (they are pretty different), I believe this
>> is not a good thing to do. I would suggest making so that we have a
>> single API.
> 
> As in the sensor APIs ? or the zone level APIs ?
> The sensor level APIs are anyway new; the zone level ones
> we have to work out a way for them.
> 
> Is this what you are referring to ? Could you confirm/explain a bit more ?

OK. Let's assume that maybe I didn't quite get your proposal then. Let
me step back and ask you what is the relation between existing
thermal_zone_device and thermal_zone? Would existing drivers be
complaint with new API?

> 
> Thanks,
> Durga
> 
>>
>>> This patch set is based on Rui's -next tree, and is
>>> tested on a Core-i5 and an Atom netbook.
>>>
>>> Changes since v2:
>>>  * Reworked the map sysfs attributes in patch [5/8]
>>>  * Dropped configuration for maximum sensors and
>>>    cooling devices, through Kconfig.
>>>  * Added __remove_trip_attr method
>>>  * Renamed __clean_map_entry to __remove_map_entry
>>>    for consistency in naming.
>>> Changes Since v1:
>>>  * Removed kobject creation for thermal_trip and thermal_map
>>>    nodes as per Greg-KH's comments.
>>>  * Added ABI Documentation under 'testing'.
>>>  * Modified the GET_INDEX macro to be more linux-like, thanks
>>>    to Joe Perches.
>>>  * Added get_[sensor/cdev]_by_name APIs to thermal.h
>>>
>>> This series contains 8 patches:
>>> Patch 1/8: Creates new sensor level APIs
>>> Patch 2/8: Creates new zone level APIs. The existing tzd structure is
>>>            kept as such for clarity and compatibility purposes.
>>> Patch 3/8: Creates functions to add/remove a cdev to/from a zone. The
>>>            existing tcd structure need not be modified.
>>> Patch 4/8: Adds sensorX_trip_[active/passive/hot/critical] sysfs nodes,
>>> 	   under /sys/class/thermal/zoneY/. This exposes various trip
>>>            points for sensorX present in zoneY.
>>> Patch 5/8: Adds mapY_* sysfs node. These attributes represent
>>>            the binding relationship between a sensor and a cdev,
>>>            within a zone.
>>> Patch 6/8: Creates Documentation for the new APIs. A new file is
>>>            created for clarity. Final goal is to merge with the existing
>>>            file or refactor the files, as whatever seems appropriate.
>>> Patch 7/8: Add ABI documentation for sysfs interfaces introduced in this patch.
>>> Patch 8/8: A dummy driver that can be used for testing. This is not for merge.
>>>
>>> Durgadoss R (8):
>>>   Thermal: Create sensor level APIs
>>>   Thermal: Create zone level APIs
>>>   Thermal: Add APIs to bind cdev to new zone structure
>>>   Thermal: Add trip point sysfs nodes for sensor
>>>   Thermal: Create Thermal map sysfs attributes for a zone
>>>   Thermal: Add Documentation to new APIs
>>>   Thermal: Add ABI Documentation for sysfs interfaces
>>>   Thermal: Dummy driver used for testing
>>>
>>>  Documentation/ABI/testing/sysfs-class-thermal |  137 ++++
>>>  Documentation/thermal/sysfs-api2.txt          |  247 ++++++
>>>  drivers/thermal/Kconfig                       |    5 +
>>>  drivers/thermal/Makefile                      |    2 +
>>>  drivers/thermal/thermal_sys.c                 |  994 +++++++++++++++++++++++++
>>>  drivers/thermal/thermal_test.c                |  324 ++++++++
>>>  include/linux/thermal.h                       |  123 ++-
>>>  7 files changed, 1831 insertions(+), 1 deletion(-)
>>>  create mode 100644 Documentation/ABI/testing/sysfs-class-thermal
>>>  create mode 100644 Documentation/thermal/sysfs-api2.txt
>>>  create mode 100644 drivers/thermal/thermal_test.c
>>>
>>
>>
>> --
>> You have got to be excited about what you are doing. (L. Lamport)
>>
>> Eduardo Valentin
> 
> 
> 


-- 
You have got to be excited about what you are doing. (L. Lamport)

Eduardo Valentin


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