On Fri, Jan 20, 2017 at 8:52 AM, Peter Chen <hzpeterchen@xxxxxxxxx> wrote: > 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. 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 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
