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

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Message-ID: <20240119074831.2979671-1-phoenixshen@google.com>
Date: Fri, 19 Jan 2024 15:48:17 +0800
From: Ting Shen <phoenixshen@...omium.org>
To: LKML <linux-kernel@...r.kernel.org>
Cc: fshao@...omium.org,
	Ting Shen <phoenixshen@...gle.com>,
	Benson Leung <bleung@...omium.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	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: [PATCH v2] Input: cros_ec_keyb: add support for base attached event

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.

Signed-off-by: Ting Shen <phoenixshen@...gle.com>
---

Changes in v2:
- update commit message

 drivers/input/keyboard/cros_ec_keyb.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/input/keyboard/cros_ec_keyb.c b/drivers/input/keyboard/cros_ec_keyb.c
index 30678a34cf647..d2e0d89d4ffdf 100644
--- a/drivers/input/keyboard/cros_ec_keyb.c
+++ b/drivers/input/keyboard/cros_ec_keyb.c
@@ -128,6 +128,11 @@ static const struct cros_ec_bs_map cros_ec_keyb_bs[] = {
 		.code		= SW_TABLET_MODE,
 		.bit		= EC_MKBP_TABLET_MODE,
 	},
+	{
+		.ev_type	= EV_SW,
+		.code		= SW_DOCK,
+		.bit		= EC_MKBP_BASE_ATTACHED,
+	},
 };
 
 /*
-- 
2.43.0.429.g432eaa2c6b-goog