linux-kernel - [PATCH 1/3] Input: add `SW_BOOT

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Message-Id: <20220922101211.3215888-2-foss+kernel@0leil.net>
Date:   Thu, 22 Sep 2022 12:12:09 +0200
From:   Quentin Schulz <foss+kernel@...il.net>
To:     unlisted-recipients:; (no To-header on input)
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        heiko@...ech.de, dmitry.torokhov@...il.com,
        klaus.goger@...obroma-systems.com, foss+kernel@...il.net,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-input@...r.kernel.org,
        Quentin Schulz <quentin.schulz@...obroma-systems.com>
Subject: [PATCH 1/3] Input: add `SW_BOOT_ALT`

From: Quentin Schulz <quentin.schulz@...obroma-systems.com>

This event code represents the firmware source to use at boot.
Value 0 means using "standard" firmware source, value 1 means using
"alternative" firmware source.

For example, some hardware has the ability to force the BOOTROM to load
the bootloader from a secondary firmware source (say SD card) instead of
trying with the standard first and then the secondary. This event allows
the userspace to know which firmware source was requested *in hardware*.

Signed-off-by: Quentin Schulz <quentin.schulz@...obroma-systems.com>
---
 include/linux/mod_devicetable.h        | 2 +-
 include/uapi/linux/input-event-codes.h | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 549590e9c644..009e71376a61 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		0x11
 #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..8cd2b58c81d7 100644
--- a/include/uapi/linux/input-event-codes.h
+++ b/include/uapi/linux/input-event-codes.h
@@ -917,7 +917,8 @@
 #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_BOOT_ALT		0x11  /* set = alternative boot firmware source */
+#define SW_MAX			0x11
 #define SW_CNT			(SW_MAX+1)
 
 /*
-- 
2.37.3