linux-kernel - [PATCH 1/4] input: uapi: Add trigger_left and trigger_right to ff_rumble

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Date:   Sun, 10 Apr 2022 17:06:33 -0500
From:   Daniel Bomar <dbdaniel42@...il.com>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Daniel Bomar <dbdaniel42@...il.com>
Subject: [PATCH 1/4] input: uapi: Add trigger_left and trigger_right to ff_rumble_effect struct

Add 2 variables to the control the trigger motors into the struct that
gets passed in from userspace.

ff_rumble_effect is part of a union in ff_effect. This does not grow the
total size of the union so should be ABI compatible.

Signed-off-by: Daniel Bomar <dbdaniel42@...il.com>
---
 include/uapi/linux/input.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/uapi/linux/input.h b/include/uapi/linux/input.h
index ee3127461ee0..d187e00d91a1 100644
--- a/include/uapi/linux/input.h
+++ b/include/uapi/linux/input.h
@@ -415,6 +415,8 @@ struct ff_periodic_effect {
  * struct ff_rumble_effect - defines parameters of a periodic force-feedback effect
  * @strong_magnitude: magnitude of the heavy motor
  * @weak_magnitude: magnitude of the light one
+ * @trigger_left: magnitude of the motor behind the left trigger
+ * @trigger_right: magnitude of the motor behind the right trigger
  *
  * Some rumble pads have two motors of different weight. Strong_magnitude
  * represents the magnitude of the vibration generated by the heavy one.
@@ -422,6 +424,8 @@ struct ff_periodic_effect {
 struct ff_rumble_effect {
 	__u16 strong_magnitude;
 	__u16 weak_magnitude;
+	__u16 trigger_left;
+	__u16 trigger_right;
 };
 
 /**
-- 
2.35.1