linux-kernel - Re: [PATCH] platform/chrome: Create new USB driver for RGB keyboard in ChromeOS devices

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Message-ID: <CACeCKad16bs_f6bLthTAoEL28tPvf1S10WDeM7ugeaS9g7R25w@mail.gmail.com>
Date:   Thu, 1 Dec 2022 12:10:22 -0800
From:   Prashant Malani <pmalani@...omium.org>
To:     Won Chung <wonchung@...gle.com>
Cc:     Benson Leung <bleung@...omium.org>, linux-kernel@...r.kernel.org,
        chrome-platform@...ts.linux.dev
Subject: Re: [PATCH] platform/chrome: Create new USB driver for RGB keyboard
 in ChromeOS devices

Hi Won,

On Wed, Nov 30, 2022 at 3:19 PM Won Chung <wonchung@...gle.com> wrote:
>
> Without any driver bound to RGB keyboard, it may not be suspended
> properly, preventing USB xHCI to be suspended and causing power drain.
> Create new USB driver for RGB keyboard so that it can be suspended
> properly.

This seems like overkill. Can't you set this from USB's sysfs nodes
like power/control [1] ?

[1] https://www.kernel.org/doc/html/latest/driver-api/usb/power-management.html#the-user-interface-for-dynamic-pm


Best regards,

-Prashant