linux-kernel - Re: [PATCH V4 00/30] thermal: exynos: Add thermal driver for exynos5440

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Message-ID: <51ADE515.5020802@ti.com>
Date:	Tue, 4 Jun 2013 09:01:09 -0400
From:	Eduardo Valentin <eduardo.valentin@...com>
To:	Eduardo Valentin <eduardo.valentin@...com>
CC:	amit daniel kachhap <amit.daniel@...sung.com>,
	<linux-pm@...r.kernel.org>, Zhang Rui <rui.zhang@...el.com>,
	<linux-samsung-soc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Kukjin Kim <kgene.kim@...sung.com>
Subject: Re: [PATCH V4 00/30] thermal: exynos: Add thermal driver for exynos5440


Hi,

On 04-06-2013 08:57, Eduardo Valentin wrote:
> On 04-06-2013 00:55, amit daniel kachhap wrote:
>> Hi Eduardo,
>>
>> On Wed, May 15, 2013 at 8:14 PM, Eduardo Valentin
>> <eduardo.valentin@...com> wrote:
>>> On 14-05-2013 05:58, Amit Daniel Kachhap wrote:
>>>> Changes in V4:
>>>>  Almost all the changes in this version is as per suggestion from Eduardo.The
>>>>  major ones are listed below,
>>>> * Added kconfig symbol ARCH_HAS_TMU which needs to be enabled by platform. With
>>>>   this change existing symbol EXYNOS_TMU_DATA is not needed.
>>>
>>> I was more thinking if we could have a single flag that we could use in
>>> thermal drivers. Besides, my proposal for ARCH_HAS_BANDGAP is still not
>>> merged yet.
>>
>> yes a single flag might be useful such as ARCH_HAS_THERMAL but this
>> patch can work as an intermediate solution.
> 
> I think bandgap is a generic enough term IMO.
> 
> [1] - http://en.wikipedia.org/wiki/Bandgap_voltage_reference
> [2] - http://en.wikipedia.org/wiki/Silicon_bandgap_temperature_sensor
> 

Hit the send button too early. So, I think bandgap is a generic enough
term. Using bandgap I believe it is better because its meaning has the
implication of having a device to control thermal.

But if you feel more confident with the thermal term we can switch to
something like HAS_THERMAL_CONTROL.

> 
>>
>> Thanks,
>> Amit Daniel
>>>
>>>> * Movement of freq_clip_table from exynos_tmu.h to exynos_thermal_common.h is
>>>>   explained in the commit logs.
>>>> * Wrote all register description documentation.
>>>> * Split 5440 TMU support patch into controller change, configuration data and
>>>>   feature addition patches.
>>>> * Remove all *LINUX_* in the header files.
>>>> * Still regulator enable is kept optional but a TODO: comment is added to fix
>>>>   it later.
>>>>
>>>> Changes in V3:
>>>> * Added proper dependency of different exynos thermal Kconfig symbols. Basically 3
>>>>  Kconfig can be enabled now and corresponds to tmu driver. exynos common part
>>>>  and exynos configuration data. This issue was raised by Rui Zhang.
>>>>
>>>> Changes in V2:
>>>> * Separated SOC data from TMU driver. This is as per suggestion from Eduardo.
>>>> * Merged the new file created for exynos5440 TMU controller with the existing
>>>>  TMU controller code.
>>>> * Removed the DT parsing code as now the SOC specific data are cleanly put
>>>>  inside the data specific file.
>>>> * Even the register definations/bitfields are treated as data as there is
>>>>  some variation across SOC's.
>>>>
>>>> This patchset adds TMU(Thermal management Unit) driver support for
>>>> exynos5440 platform. There are 3 instances of the TMU controllers so
>>>> necessary cleanup/re-structure is done to handle multiple thermal zone.
>>>>
>>>> Patch (exynos4: Add documentation for Exynos SoC thermal bindings) from
>>>> Lukasz Majewski is already posted to mainline. Adding it here for completeness.
>>>> (http://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg17817.html)
>>>>
>>>> Patch (thermal: exynos: Support thermal tripping ) from Jonghwan Choi is
>>>> added here with some changes.
>>>> (https://patchwork.kernel.org/patch/1668371/)
>>>>
>>>> Patch (thermal: exynos: Support for TMU regulator defined at device tree)
>>>> is a repost of my earlier patch(https://patchwork-mail1.kernel.org/patch/2510771/)
>>>> and adds regulator support.
>>>>
>>>> Patch (ARM: dts: Add device tree node for exynos5440 TMU controller) and
>>>> patch (arm: exynos: enable ARCH_HAS_TMU) can be merged through exynos platform
>>>> maintainer as this can cause merge conflict.
>>>>
>>>> All these patches are based on thermal maintainers git tree,
>>>> git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux.git next.
>>>>
>>>> Amit Daniel Kachhap (29):
>>>>   thermal: exynos: Moving exynos thermal files into samsung directory
>>>>   thermal: exynos: Add ARCH_HAS_TMU config to know the supported soc's
>>>>   thermal: exynos: Remove CPU_THERMAL dependency for using TMU driver
>>>>   thermal: exynos: Bifurcate exynos thermal common and tmu controller
>>>>     code
>>>>   thermal: exynos: Rename exynos_thermal.c to exynos_tmu.c
>>>>   thermal: exynos: Move exynos_thermal.h from include/* to driver/*
>>>>     folder
>>>>   thermal: exynos: Bifurcate exynos tmu driver and configuration data
>>>>   thermal: exynos: Add missing definations and code cleanup
>>>>   thermal: exynos: Add extra entries in the tmu platform data
>>>>   thermal: exynos: Support thermal tripping
>>>>   thermal: exynos: Move register definitions from driver file to data
>>>>     file
>>>>   thermal: exynos: Fix to clear only the generated interrupts
>>>>   thermal: exynos: Add support for instance based register/unregister
>>>>   thermal: exynos: Modify private_data to appropriate name driver_data
>>>>   thermal: exynos: Return success even if no cooling data supplied
>>>>   thermal: exynos: Make the zone handling dependent on trip count
>>>>   thermal: exynos: Add support to handle many instances of TMU
>>>>   thermal: exynos: Add TMU features to check instead of using SOC type
>>>>   thermal: exynos: use device resource management infrastructure
>>>>   thermal: exynos: Add support to access common register for
>>>>     multistance
>>>>   thermal: exynos: Add support for exynos5440 TMU sensor.
>>>>   thermal: exynos: Fix to set the second point correction value
>>>>     properly
>>>>   thermal: exynos: Add thermal configuration data for exynos5440 TMU
>>>>     sensor
>>>>   thermal: exynos: Add a compensation logic on swapped e-fuse values
>>>>   thermal: exynos: Add hardware mode thermal calibration support
>>>>   Documentation: thermal: Explain the exynos thermal driver model
>>>>   thermal: exynos: Support for TMU regulator defined at device tree
>>>>   ARM: dts: Add device tree node for exynos5440 TMU controller
>>>>   arm: exynos: enable ARCH_HAS_TMU
>>>>
>>>> Lukasz Majewski (1):
>>>>   ARM: dts: thermal: exynos4: Add documentation for Exynos SoC thermal
>>>>     bindings
>>>>
>>>>  .../devicetree/bindings/thermal/exynos-thermal.txt |   53 +
>>>>  Documentation/thermal/exynos_thermal               |   43 +-
>>>>  arch/arm/boot/dts/exynos5440.dtsi                  |   30 +
>>>>  arch/arm/mach-exynos/Kconfig                       |    5 +
>>>>  drivers/thermal/Kconfig                            |   13 +-
>>>>  drivers/thermal/Makefile                           |    2 +-
>>>>  drivers/thermal/exynos_thermal.c                   | 1066 --------------------
>>>>  drivers/thermal/samsung/Kconfig                    |   21 +
>>>>  drivers/thermal/samsung/Makefile                   |    7 +
>>>>  drivers/thermal/samsung/exynos_thermal_common.c    |  407 ++++++++
>>>>  drivers/thermal/samsung/exynos_thermal_common.h    |   98 ++
>>>>  drivers/thermal/samsung/exynos_tmu.c               |  741 ++++++++++++++
>>>>  drivers/thermal/samsung/exynos_tmu.h               |  294 ++++++
>>>>  drivers/thermal/samsung/exynos_tmu_data.c          |  225 ++++
>>>>  drivers/thermal/samsung/exynos_tmu_data.h          |  155 +++
>>>>  include/linux/platform_data/exynos_thermal.h       |  119 ---
>>>>  16 files changed, 2076 insertions(+), 1203 deletions(-)
>>>>  create mode 100644 Documentation/devicetree/bindings/thermal/exynos-thermal.txt
>>>>  delete mode 100644 drivers/thermal/exynos_thermal.c
>>>>  create mode 100644 drivers/thermal/samsung/Kconfig
>>>>  create mode 100644 drivers/thermal/samsung/Makefile
>>>>  create mode 100644 drivers/thermal/samsung/exynos_thermal_common.c
>>>>  create mode 100644 drivers/thermal/samsung/exynos_thermal_common.h
>>>>  create mode 100644 drivers/thermal/samsung/exynos_tmu.c
>>>>  create mode 100644 drivers/thermal/samsung/exynos_tmu.h
>>>>  create mode 100644 drivers/thermal/samsung/exynos_tmu_data.c
>>>>  create mode 100644 drivers/thermal/samsung/exynos_tmu_data.h
>>>>  delete mode 100644 include/linux/platform_data/exynos_thermal.h
>>>>
>>>>
>>>>
>>>
>>>
>>
>>
> 
> 


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

Eduardo Valentin


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