netdev - Re: [PATCH 3/3 v2] net: smsc911x: add wake-up event interrupt support

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Date:   Fri, 26 Aug 2016 07:40:21 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     netdev@...r.kernel.org, "David S . Miller" <davem@...emloft.net>,
        Steve Glendinning <steve.glendinning@...c.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Jeremy Linton <jeremy.linton@....com>,
        Kamlakant Patel <kamlakant.patel@...adcom.com>,
        Pavel Fedin <p.fedin@...sung.com>,
        Sudeep Holla <sudeep.holla@....com>,
        Florian Fainelli <f.fainelli@...il.com>
Subject: Re: [PATCH 3/3 v2] net: smsc911x: add wake-up event interrupt support

* Linus Walleij <linus.walleij@...aro.org> [160824 06:00]:
> The SMSC911x have a line out of the chip called "PME",
> Power Management Event. When connected to an asynchronous
> interrupt controller this is able to wake the system up
> from sleep in response to certain network events.
> 
> This is the first attempt to support this in the Linux
> driver: the Qualcomm APQ8060 Dragonboard has this line
> routed to a GPIO line on the primary SoC padring, and as
> such it can be armed as a wakeup interrupt.
> 
> The patch is inspired by the wakeup code in the RTC
> subsystem.
> 
> The code looks for an additional interrupt - apart from the
> ordinary device interrupt - and in case that is present,
> we register an interrupt handler to respons to this,
> and flag the device and this interrupt as a wakeup.
> 
> Cc: Sudeep Holla <sudeep.holla@....com>
> Cc: Tony Lindgren <tony@...mide.com>
> Cc: Florian Fainelli <f.fainelli@...il.com>
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
> ChangeLog v1->v2:
> - Call pm_wakeup_event() in the wakeup IRQ thread to
>   account for the wakeup event.
> - Drop the enable/disable_irq_wake() calls from suspend/resume:
>   this is handled from the irq core when you call
>   dev_pm_set_wake_irq() as we do.

Looks OK to me:

Acked-by: Tony Lindgren <tony@...mide.com>