Hi, On Wednesday 20 December 2017 11:59 AM, Manu Gautam wrote: > Hi, > > > On 12/20/2017 11:19 AM, Kishon Vijay Abraham I wrote: >> Hi, >> >> On Tuesday 12 December 2017 08:54 PM, Manu Gautam wrote: >>> Hi, >>> >>> >>> On 12/12/2017 5:13 PM, Kishon Vijay Abraham I wrote: >>>> Hi, >>>> >>>> On Tuesday 21 November 2017 02:53 PM, Manu Gautam wrote: >>>>> QCOM USB PHYs can monitor resume/remote-wakeup event in >>>>> suspended state. However PHY driver must know current >>>>> operational speed of PHY in order to set correct polarity of >>>>> wakeup events for detection. E.g. QUSB2 PHY monitors DP/DM >>>>> signals depending on speed is LS or FS/HS to detect resume. >>>>> Similarly QMP USB3 PHY in SS mode should monitor RX >>>>> terminations attach/detach and LFPS events depending on >>>>> SSPHY is active or not. >> Why not use a notification mechanism instead of adding new APIs in phy-core. >> This will only bloat phy-core with APIs for a particular platform. > > Do you mean notifier_chains ? > When we have multiple instances of USB PHYs then notifier chains are not > of much help. For any platform glue or PHY driver it will be very difficult to > figure out if notification received for speed was for same phy/bus or a > different one. > Using PHY callbacks looked more elegant to me. Additionally PHY drivers > can also use this info decide power management policy e.g. if speed is > INVALID then it means PHY is not in a session and it can enter deepest > low power state. > Additionally if you prefer set_speed name over notify_speed then I am > ok with that as well so that it sounds more generic. I'd prefer adding modes in enum phy_mode according to speed and using phy_set_mode. Thanks Kishon -- 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
