[U-Boot] [PATCH 00/19] [RFC] Power(full) framework based on Driver Model

[Przemyslaw Marczak <p.marczak@samsung.com>]

Hello Tom,

On 10/22/2014 05:31 PM, Tom Rini wrote:
> On Wed, Oct 08, 2014 at 10:48:36PM +0200, Przemyslaw Marczak wrote:
>
>> Hello,
>> This piece of code was a base for prepare my presentation talk
>> for the U-Boot Mini Summit, which taking place at ELCE2014 conference,
>> 13-th October 2014 Dusseldorf, Germany.
>>
>> The tittle of talk: "Power(full) framework based on Driver Model"
>>
>> The presentation will be shared after the Summit.
>>
>> This patchset introduces the new one PMIC framework for the U-Boot.
>> It is still under the construction, but the basic functionality was
>> achieved and tested. Please feel free to comment and share the opinion.
>>
>> I think that each patch is described full enough, but for some more design
>> details, please look into the documentation file. It includes some basic
>> examples for the PMIC drivers.
>>
>> Quick summary of:
>> Framework:
>> - The new approach - UCLASS_PMIC - simple and designed for device I/O only
>> - Add new uclass types: UCLASS_PMIC and UCLASS_PMIC_REGULATOR
>> - Two uclass drivers for above types
>> - A common regulator operations - will easy cover the real devices design
>>
>> Drivers:
>> - Introduce new PMIC API for drivers - now everything base on "struct udevice"
>> - Introduce Regulator Voltage descriptors and Operation Mode descriptors
>>    which are usually taken from the device tree (board dependent data)
>> - Two uclass device drivers for MAX77686(PMIC+REGULATOR)
>>
>> User Interface:
>> - command pmic, unchanged functionality and ported to the driver model
>> - command regulator(NEW) for safe regulator setup from commandline,
>>    - now can check output Voltage and operation mode of the regulators,
>>    - also can check the board Voltage limits and driver available modes
>>
>> The future plans:
>> - Wait for the I2c Driver Model implementation
>> - Introduce a common way to bind pmic devices - now done by alias "pmic"
>> - Add additional uclass types: MUIC, CHARGER, BATTERY, MFD and maybe more.
>> - Introduce optimal operations for new uclasses
>> - Port all U-Boot drivers to the new Framework
>> - Remove the old drivers and the old PMIC Framework code
>>
>> The assumptions of this work is:
>> - Add new code to independent files
>> - Keep two Frameworks as independent and without conflicts
>> - Don't mix OLD/NEW Framework code - for the readability
>> - Port all drivers using new API
>> - Remove the old Framework and the old drivers
>>
>> A disadvantage:
>> - some parts of the present code is duplicated
>>
>> Need help:
>> - After merge this, it is welcome to help with driver porting.
>> - Everything should be tested
>>
>> The extra feature:
>> The first commit introduces errno_str() function.
>> It is a common function which I hope will be usefull for commands and not only.
>> If any visible error says: -19 or some other magic number, then it means that
>> this function should be used.
>>
>> U-Boot Mini Summit members:
>> This code is maybe not as good as it could be, but the time was limited,
>> and the conference is comming soon. I don't expects a code review of this
>> now, but it would be nice if you take a look of this piece of code before
>> our U-Boot Mini Summit. Of course it depends on you.
>
> Per the mini-summit, please add a patch adding yourself as pmic
> custodian (so something to doc/git-mailrc, shoot me your patchwork
> username and Detlev an ssh key so we can get a repo setup).  For this
> series, I'm going to review/ack and I want Simon to pick it up for the
> DM tree since I think that makes the most sense, yes?  Thanks!
>
> And for all the patches in the series I don't reply to, they seem fine
> but aren't for me to ack (being board specific stuff, that looked fine
> but I don't have the HW) or I just agree with Simon's comments.
>

Ok, so this code will be rebased on to u-boot-dm/i2c-working.
And I will send the required informations to you and Detlev.

Best Regards,
-- 
Przemyslaw Marczak
Samsung R&D Institute Poland
Samsung Electronics
p.marczak at samsung.com