linux-kernel - Re: [RFC v6 0/3] usb: phy: hold wakeupsource on usb phy events.

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Message-ID: <CA+RfmHapPLLMEmVM9P=JxaN5ZNQJ8TkzRu=dTmQic2O_D6xBLw@mail.gmail.com>
Date:	Mon, 17 Nov 2014 13:48:54 +0530
From:	Kiran Raparthy <kiran.kumar@...aro.org>
To:	LKML <linux-kernel@...r.kernel.org>, Felipe Balbi <balbi@...com>
Cc:	Kiran Kumar Raparthy <kiran.kumar@...aro.org>
Subject: Re: [RFC v6 0/3] usb: phy: hold wakeupsource on usb phy events.

Hi Felipe,
Just a gentle reminder. Could you please review/share your comments
for the below v6 patches which i sent earlier.

[RFC v6 1/3] usb: phy: introduce usb_phy_set_event interface
[RFC v6 2/3] usb: phy: handle per-PHY connect and disconnect events
[RFC v6 3/3] usb: phy: hold wakeupsource when USB is enumerated in
peripheral mode

Thanks in advance for your time.

Regards,
Kiran

On 12 November 2014 12:08, Kiran Kumar Raparthy <kiran.kumar@...aro.org> wrote:
> This patch set aims to hold wakeupsource per-PHY on usb connect/disconnect
> events.
>
> First patch introduces usb_phy_set_event  which just sets
> event to phy event.
> In second patch, phy drivers call usb_phy_set_event for each phy event.
> In third patch, wakeupsource is held when usb is enumerated in
> peripheral mode and wakeupsource held temporarily on disconnect
> event(to allow other parts of the system react to disconnect event).
>
> v6:
> * Break the patch into three sub patches
>   patch 1: Introduce usb_phy_set_event
>   patch 2: Call usb_phy_set_event from phy drivers
>   patch 3: Hold wakeupsource for connect events and
>             temporarily hold wakeupsource for disconnect events.
> * Include usb_phy_wsource_init and usb_phy_wource_trash functionality
>   in usb_add_phy and usb_remove_phy respectively.
>
> v5:
> * with the new approach,i was able to chnage only 5 phy drivers
>   as mentioned below to use the wakeupsource funtionality.
>
> drivers/phy/phy-omap-control.c
> drivers/usb/phy/phy-ab8500-usb.c
> drivers/usb/phy/phy-tahvo.c
> drivers/usb/phy/phy-mv-usb.c
> drivers/usb/phy/phy-gpio-vbus-usb.c
>
> * Notification method not used any more.
> * introduced usb_phy_set_event in phy.c to hold wakeupsource
> * introduced usb_phy_wsource_init/usb_phy_wsource_trash in phy.c to
>   initialize/relese per-PHY wakeupsource.These interfaces called from
>   probe/remove functions of phy drivers.
> * usb_phy_set_event called from phy drivers where usb enumeration
>   event is handled.
> * usb_phy_set_event expects usb_phy handle where as phy-omap-control.c
>   provides its own type(omap_control_phy), so directly called __pm_stay_awake
>   and  __pm_awake_event from phy-omap-control.c instead of calling
>   usb_phy_set_event.
>
> v4:
> * Temporarily hold wakeupsource patch integrated into main patch.
> * As per feedback,dropped "enabled" module parameter.
> * Introduced otgws_otg_usb3_notifications function to handle event
>   notifications from usb3 phy.
> * Handled wakeupsource initialization,spinlock,registration of notifier block
>   per-PHY.
> * Updated usb_phy structure.
>
> v3:
> * As per the feedback,no global phy pointer used.
> * called the one-liner wakeupsource handling calls
>   directly instead of indirect functions implemented in v2.
> * Removed indirect function get_phy_hook and used usb_get_phy
>   to get the phy handle..
>
> v2:
> * wakeupsource handling implemeted per-PHY
> * Implemented wakeupsource handling calls in phy
> * included Todd's refactoring logic.
>
> v1:
> * changed to "disabled by default" from "enable by default".
> * Kconfig help text modified
> * Included better commit text
> * otgws_nb moved to otg_wakeupsource_init function
> * Introduced get_phy_hook to handle otgws_xceiv per-PHY
>
> Initial RFC:
> * Included build fix from Benoit Goby and Arve Hjønnevåg
> * Removed lock->held field in driver as this mechanism is
>   provided in wakeupsource driver.
> * wakelock(wl) terminology replaced with wakeup_source(ws).
>
> Todd Poynor (3):
>   usb: phy: introduce usb_phy_set_event interface
>   usb: phy: Handle per-PHY event for connect and disconnect events
>   usb: phy: Hold wakeupsource when USB is enumerated in peripheral mode
>
>  drivers/usb/phy/phy-ab8500-usb.c    | 15 +++++++++++++++
>  drivers/usb/phy/phy-gpio-vbus-usb.c |  2 ++
>  drivers/usb/phy/phy-mv-usb.c        |  2 ++
>  drivers/usb/phy/phy-tahvo.c         |  2 ++
>  drivers/usb/phy/phy.c               | 37 +++++++++++++++++++++++++++++++++++++
>  include/linux/usb/phy.h             | 10 ++++++++++
>  6 files changed, 68 insertions(+)
>
> --
> 1.8.2.1
>
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