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

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Date:	Thu, 29 Aug 2013 15:38:29 -0400
From:	Eduardo Valentin <eduardo.valentin@...com>
To:	Durgadoss R <durgadoss.r@...el.com>
CC:	<rui.zhang@...el.com>, <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
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.

> 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


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