linux-kernel - [PATCH 3/4] platform/surface: aggregator_registry: Add support for tablet mode switch on Surface Pro 8

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Date:   Fri, 24 Jun 2022 20:36:41 +0200
From:   Maximilian Luz <luzmaximilian@...il.com>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Mark Gross <markgross@...nel.org>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        Maximilian Luz <luzmaximilian@...il.com>
Subject: [PATCH 3/4] platform/surface: aggregator_registry: Add support for tablet mode switch on Surface Pro 8

Add a KIP subsystem tablet-mode switch device for the Surface Pro 8.
The respective driver for this device provides SW_TABLET_MODE input
events for user-space based on the state of the keyboard cover (e.g.
detached, folded-back, normal/laptop mode).

Signed-off-by: Maximilian Luz <luzmaximilian@...il.com>
---
 drivers/platform/surface/surface_aggregator_registry.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/surface/surface_aggregator_registry.c b/drivers/platform/surface/surface_aggregator_registry.c
index bf3303f1aa71..8f249df673a4 100644
--- a/drivers/platform/surface/surface_aggregator_registry.c
+++ b/drivers/platform/surface/surface_aggregator_registry.c
@@ -77,6 +77,12 @@ static const struct software_node ssam_node_tmp_pprof = {
 	.parent = &ssam_node_root,
 };
 
+/* Tablet-mode switch via KIP subsystem. */
+static const struct software_node ssam_node_kip_tablet_switch = {
+	.name = "ssam:01:0e:01:00:01",
+	.parent = &ssam_node_root,
+};
+
 /* DTX / detachment-system device (Surface Book 3). */
 static const struct software_node ssam_node_bas_dtx = {
 	.name = "ssam:01:11:01:00:00",
@@ -264,11 +270,11 @@ static const struct software_node *ssam_node_group_sp8[] = {
 	&ssam_node_bat_ac,
 	&ssam_node_bat_main,
 	&ssam_node_tmp_pprof,
+	&ssam_node_kip_tablet_switch,
 	&ssam_node_hid_kip_keyboard,
 	&ssam_node_hid_kip_penstash,
 	&ssam_node_hid_kip_touchpad,
 	&ssam_node_hid_kip_iid5,
-	/* TODO: Add support for tablet mode switch. */
 	NULL,
 };
 
-- 
2.36.1