On Fri, Jan 20, 2017 at 11:21:27AM +0100, Rafael J. Wysocki wrote:

On Fri, Jan 20, 2017 at 8:52 AM, Peter Chen [off-list ref] wrote:

quoted

On Tue, Jan 10, 2017 at 03:02:41PM +0800, Peter Chen wrote:

quoted

On Sat, Jan 07, 2017 at 10:54:56AM +0200, Krzysztof Kozlowski wrote:

quoted

On Thu, Jan 05, 2017 at 02:01:53PM +0800, Peter Chen wrote:

quoted

We have an well-known problem that the device needs to do some power
sequence before it can be recognized by related host, the typical
example like hard-wired mmc devices and usb devices.

This power sequence is hard to be described at device tree and handled by
related host driver, so we have created a common power sequence
library to cover this requirement. The core code has supplied
some common helpers for host driver, and individual power sequence
libraries handle kinds of power sequence for devices. The pwrseq
librares always need to allocate extra instance for compatible
string match.

pwrseq_generic is intended for general purpose of power sequence, which
handles gpios and clocks currently, and can cover other controls in
future. The host driver just needs to call of_pwrseq_on/of_pwrseq_off
if only one power sequence is needed, else call of_pwrseq_on_list
/of_pwrseq_off_list instead (eg, USB hub driver).

For new power sequence library, it can add its compatible string
to pwrseq_of_match_table, then the pwrseq core will match it with
DT's, and choose this library at runtime.

Signed-off-by: Peter Chen <redacted>
Tested-by: Maciej S. Szmigiero <redacted>
Tested-by Joshua Clayton [off-list ref]
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Tested-by: Matthias Kaehlcke <mka@chromium.org>

Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested on Odroid U3 (reset sequence for LAN9730):
Tested-by: Krzysztof Kozlowski <krzk@kernel.org>

A nice ping...

Rafael, would you please review it? This series was discussed about
half a year, and many people need it, I hope it can be in v4.11-rc1,
thanks.

I'm travelling now
(http://marc.info/?l=linux-pm&m=148410629024194&w=2) and (as stated in
this message) I'll get to the patches when I'm back home.

There is a good chance for your code to go into 4.11-rc1 if the review
comments so far have been addressed.

Thanks, Rafael. I think I have addressed all your comments.

-- 

Best Regards,
Peter Chen