linux-kernel - Re: [PATCH v2] Input: cros_ec_keyb: add support for base attached event

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Date: Fri, 19 Jan 2024 00:15:11 -0800
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Ting Shen <phoenixshen@...omium.org>
Cc: LKML <linux-kernel@...r.kernel.org>, fshao@...omium.org,
	Ting Shen <phoenixshen@...gle.com>,
	Benson Leung <bleung@...omium.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Guenter Roeck <groeck@...omium.org>,
	Tzung-Bi Shih <tzungbi@...nel.org>,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	chrome-platform@...ts.linux.dev,
	joewu (吳仲振) <joewu@....com>,
	linux-input@...r.kernel.org
Subject: Re: [PATCH v2] Input: cros_ec_keyb: add support for base attached
 event

On Fri, Jan 19, 2024 at 03:48:17PM +0800, Ting Shen wrote:
> There is a new type of ChromeOS detachable keyboard that talks to
> the host via CrOS EC host command interface, rather than the USB
> interface.
> 
> To trigger the firmware update daemon (hammerd) on this keyboard, a
> signal is required to replace the typical USB hotplug event. This patch
> addresses this by mapping the EC's BASE_ATTACHED event to SW_DOCK.

I think emitting an uevent on attachment might make more sense here,
SW_DOCK is to signal attachment of a legacy docking station.

Thanks.

-- 
Dmitry