linux-kernel - [PATCH 1/3] input: add event codes for user programmable switch events

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Message-ID: <20220516142158.1612109-1-caleb@connolly.tech>
Date:   Mon, 16 May 2022 14:22:57 +0000
From:   Caleb Connolly <caleb@...nolly.tech>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        phone-devel@...r.kernel.org
Cc:     Caleb Connolly <caleb@...nolly.tech>
Subject: [PATCH 1/3] input: add event codes for user programmable switch events

Add SW_PROG{1,2,3,4} for device switches which are handled by userspace.

This can be used for devices with "generic" switches which are intended
to be user-programmable, for example OnePlus phones contain a tri-state
key which can be used for switching between mute/vibrate/ring, or
programmed by the user to perform any arbitrary actions.

These are analogous to the keys KEY_PROG{1,2,3,4} found on some
keyboards.

Signed-off-by: Caleb Connolly <caleb@...nolly.tech>
---
See the next patch in this series for an example usecase.
---
 include/linux/mod_devicetable.h        | 2 +-
 include/uapi/linux/input-event-codes.h | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 5da5d990ff58..45364fbeaaf7 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -326,7 +326,7 @@ struct pcmcia_device_id {
 #define INPUT_DEVICE_ID_LED_MAX		0x0f
 #define INPUT_DEVICE_ID_SND_MAX		0x07
 #define INPUT_DEVICE_ID_FF_MAX		0x7f
-#define INPUT_DEVICE_ID_SW_MAX		0x10
+#define INPUT_DEVICE_ID_SW_MAX		0x14
 #define INPUT_DEVICE_ID_PROP_MAX	0x1f

 #define INPUT_DEVICE_ID_MATCH_BUS	1
diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h
index dff8e7f17074..339153886a13 100644
--- a/include/uapi/linux/input-event-codes.h
+++ b/include/uapi/linux/input-event-codes.h
@@ -917,7 +917,11 @@
 #define SW_MUTE_DEVICE		0x0e  /* set = device disabled */
 #define SW_PEN_INSERTED		0x0f  /* set = pen inserted */
 #define SW_MACHINE_COVER	0x10  /* set = cover closed */
-#define SW_MAX			0x10
+#define SW_PROG1		0x11  /* set = program 1 (user defined) */
+#define SW_PROG2		0x12  /* set = program 2 (user defined) */
+#define SW_PROG3		0x13  /* set = program 3 (user defined) */
+#define SW_PROG4		0x14  /* set = program 4 (user defined) */
+#define SW_MAX			0x14
 #define SW_CNT			(SW_MAX+1)

 /*
--
2.36.1