Re: [PATCH v11 2/8] power: add power sequence library

[Peter Chen]

On Tue, Jan 10, 2017 at 03:02:41PM +0800, Peter Chen wrote:
> On Sat, Jan 07, 2017 at 10:54:56AM +0200, Krzysztof Kozlowski wrote:
> > On Thu, Jan 05, 2017 at 02:01:53PM +0800, Peter Chen wrote:
> > > 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 <peter.chen@xxxxxxx>
> > > Tested-by: Maciej S. Szmigiero <mail@xxxxxxxxxxxxxxxxxxxxx>
> > > Tested-by Joshua Clayton <stillcompiling@xxxxxxxxx>
> > > Reviewed-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
> > > Tested-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
> > 
> > Acked-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
> > Tested on Odroid U3 (reset sequence for LAN9730):
> > Tested-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
> > 
> 
> 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.

-- 

Best Regards,
Peter Chen