linux-kernel - Re: [PATCH v2 0/4] toshiba_acpi: Add support for USB Sleep functions

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Message-ID: <CAGdLNWGJwXTS1GBkWeOZKfeACZhociMqSVrz-=7XFQTTxEf+TA@mail.gmail.com>
Date:	Wed, 21 Jan 2015 11:21:06 -0700
From:	Azael Avalos <coproscefalo@...il.com>
To:	Oliver Neukum <oneukum@...e.de>
Cc:	Darren Hart <dvhart@...radead.org>,
	"platform-driver-x86@...r.kernel.org" 
	<platform-driver-x86@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-usb@...r.kernel.org
Subject: Re: [PATCH v2 0/4] toshiba_acpi: Add support for USB Sleep functions

Hi there,

Sorry for the late reply.

2015-01-20 4:15 GMT-07:00 Oliver Neukum <oneukum@...e.de>:
> On Sun, 2015-01-18 at 18:30 -0700, Azael Avalos wrote:
>> The following patches add support to several USB Sleep functions
>> found on newer Toshiba laptops, allowing to use the USB ports while
>> the laptop is asleep or turned off.
>
> Hi,
>
> this is most interesting. But the interface is terrible. If

Well, I'm just providing the on/off switch on Toshiba specific hardware,
but I'm unaware/unfamiliar with how other vendors implement this
feature.

> possible we would like to have a generic interface for this,
> which should not depend on the specific platform in use and would
> have to be per bus or even per port (for example the ports on a
> Thunderbolt dock would not work with your module).

Sounds good, as not all ports carry such functionality, on my
current laptop only two ports provide this, the other two are just
normal USB 2/3 ports (configurable ;-) ).

> Do you think we could provide a hook from generic code into
> platform code to detect the capability for power control?

If there's an existing API already, I'll be glad to modify the code to
use it, if it doesn't exist yet, I'll simply adapt the code to the chosen
standard whenever becomes available.

>
>         Regards
>                 Oliver
>
>
>

Cheers
Azael



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