linux-kernel - [PATCH] ACPI: battery: Add device HID and quirk for Microsoft Surface Go 3

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Date:   Sun, 13 Feb 2022 16:49:20 +0100
From:   Maximilian Luz <luzmaximilian@...il.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Maximilian Luz <luzmaximilian@...il.com>,
        Len Brown <lenb@...nel.org>, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: [PATCH] ACPI: battery: Add device HID and quirk for Microsoft Surface Go 3

For some reason, the Microsoft Surface Go 3 uses the standard ACPI
interface for battery information, but does not use the standard PNP0C0A
HID. Instead it uses MSHW0146 as identifier. Add that ID to the driver
as this seems to work well.

Additionally, the power state is not updated immediately after the AC
has been (un-)plugged, so add the respective quirk for that.

Cc: <stable@...r.kernel.org>
Signed-off-by: Maximilian Luz <luzmaximilian@...il.com>
---
 drivers/acpi/battery.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index ea31ae01458b..dc208f5f5a1f 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -59,6 +59,10 @@ MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
 
 static const struct acpi_device_id battery_device_ids[] = {
 	{"PNP0C0A", 0},
+
+	/* Microsoft Surface Go 3 */
+	{"MSHW0146", 0},
+
 	{"", 0},
 };
 
@@ -1148,6 +1152,14 @@ static const struct dmi_system_id bat_dmi_table[] __initconst = {
 			DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad"),
 		},
 	},
+	{
+		/* Microsoft Surface Go 3 */
+		.callback = battery_notification_delay_quirk,
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go 3"),
+		},
+	},
 	{},
 };
 
-- 
2.35.1