[PATCH v10 0/8] power: add power sequence library

On Mon, Dec 19, 2016 at 09:15:04PM +0200, Krzysztof Kozlowski wrote:

On Mon, Nov 14, 2016 at 09:35:51AM +0800, Peter Chen wrote:

quoted

Hi all,

This is a follow-up for my last power sequence framework patch set [1].
According to Rob Herring and Ulf Hansson's comments[2]. The kinds of
power sequence instances will be added at postcore_initcall, the match
criteria is compatible string first, if the compatible string is not
matched between dts and library, it will try to use generic power sequence.
	 
The host driver just needs to call of_pwrseq_on/of_pwrseq_off
if only one power sequence instance is needed, for more power sequences
are used, using of_pwrseq_on_list/of_pwrseq_off_list instead (eg, USB hub driver).

In future, if there are special power sequence requirements, the special
power sequence library can be created.

This patch set is tested on i.mx6 sabresx evk using a dts change, I use
two hot-plug devices to simulate this use case, the related binding
change is updated at patch [1/6], The udoo board changes were tested
using my last power sequence patch set.[3]

Except for hard-wired MMC and USB devices, I find the USB ULPI PHY also
need to power on itself before it can be found by ULPI bus.

[1] http://www.spinics.net/lists/linux-usb/msg142755.html
[2] http://www.spinics.net/lists/linux-usb/msg143106.html
[3] http://www.spinics.net/lists/linux-usb/msg142815.html

Changes for v10:
- Improve the kernel-doc for power sequence core, including exported APIs and
  main structure. [Patch 2/8]
- Change Kconfig, and let the user choose power sequence. [Patch 2/8]
- Delete EXPORT_SYMBOL and change related APIs as local, these APIs do not
  be intended to export currently. [Patch 2/8]
- Selete POWER_SEQUENCE at USB core's Kconfig. [Patch 4/8]

Hi Peter,

It is great that you continued the work on this.

I saw (in some previous mails) your repo mentioned:
https://git.kernel.org/cgit/linux/kernel/git/peter.chen/usb.git/
Does it contain the recent version of this patchset?

I want to build on top of it fixes for usb3503 on Odroid U3 board.

Krzysztof, I put v10 patch set at branch: pwrseq-lib. 
It seems there are no more comments I will send my v11 patch set
after new year holiday.

-- 

Best Regards,
Peter Chen