linux-kernel - [PATCH 1/6] HID: hid-input: Add offhook and ring LEDs for headsets

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Message-Id: <20210703220202.5637-2-maxtram95@gmail.com>
Date:   Sun,  4 Jul 2021 01:01:57 +0300
From:   Maxim Mikityanskiy <maxtram95@...il.com>
To:     Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Daniel Kurtz <djkurtz@...omium.org>,
        Oliver Neukum <oneukum@...e.de>
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Maxim Mikityanskiy <maxtram95@...il.com>
Subject: [PATCH 1/6] HID: hid-input: Add offhook and ring LEDs for headsets

A lot of USBHID headsets available on the market have LEDs that indicate
ringing and off-hook states when used with VoIP applications. This
commit exposes these LEDs via the standard sysfs interface.

Signed-off-by: Maxim Mikityanskiy <maxtram95@...il.com>
---
 drivers/hid/hid-input.c                | 2 ++
 drivers/input/input-leds.c             | 2 ++
 include/uapi/linux/input-event-codes.h | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 4286a51f7f16..44b8243f9924 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -798,6 +798,8 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
 		case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 		case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 		case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
+		case 0x17:  map_led (LED_OFFHOOK);  break;    /*   "Off-Hook"                 */
+		case 0x18:  map_led (LED_RING);     break;    /*   "Ring"                     */
 
 		default: goto ignore;
 		}
diff --git a/drivers/input/input-leds.c b/drivers/input/input-leds.c
index 0b11990ade46..bc6e25b9af25 100644
--- a/drivers/input/input-leds.c
+++ b/drivers/input/input-leds.c
@@ -33,6 +33,8 @@ static const struct {
 	[LED_MISC]	= { "misc" },
 	[LED_MAIL]	= { "mail" },
 	[LED_CHARGING]	= { "charging" },
+	[LED_OFFHOOK]	= { "offhook" },
+	[LED_RING]	= { "ring" },
 };
 
 struct input_led {
diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h
index 225ec87d4f22..dd785a5b5076 100644
--- a/include/uapi/linux/input-event-codes.h
+++ b/include/uapi/linux/input-event-codes.h
@@ -925,6 +925,8 @@
 #define LED_MISC		0x08
 #define LED_MAIL		0x09
 #define LED_CHARGING		0x0a
+#define LED_OFFHOOK		0x0b
+#define LED_RING		0x0c
 #define LED_MAX			0x0f
 #define LED_CNT			(LED_MAX+1)
 
-- 
2.32.0