v4.19.13 snapshot.
diff --git a/drivers/platform/x86/peaq-wmi.c b/drivers/platform/x86/peaq-wmi.c
new file mode 100644
index 0000000..9b9e1f3
--- /dev/null
+++ b/drivers/platform/x86/peaq-wmi.c
@@ -0,0 +1,113 @@
+/*
+ * PEAQ 2-in-1 WMI hotkey driver
+ * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/acpi.h>
+#include <linux/dmi.h>
+#include <linux/input-polldev.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#define PEAQ_DOLBY_BUTTON_GUID "ABBC0F6F-8EA1-11D1-00A0-C90629100000"
+#define PEAQ_DOLBY_BUTTON_METHOD_ID 5
+#define PEAQ_POLL_INTERVAL_MS 250
+#define PEAQ_POLL_IGNORE_MS 500
+#define PEAQ_POLL_MAX_MS 1000
+
+MODULE_ALIAS("wmi:"PEAQ_DOLBY_BUTTON_GUID);
+
+static unsigned int peaq_ignore_events_counter;
+static struct input_polled_dev *peaq_poll_dev;
+
+/*
+ * The Dolby button (yes really a Dolby button) causes an ACPI variable to get
+ * set on both press and release. The WMI method checks and clears that flag.
+ * So for a press + release we will get back One from the WMI method either once
+ * (if polling after the release) or twice (polling between press and release).
+ * We ignore events for 0.5s after the first event to avoid reporting 2 presses.
+ */
+static void peaq_wmi_poll(struct input_polled_dev *dev)
+{
+ union acpi_object obj;
+ acpi_status status;
+ u32 dummy = 0;
+
+ struct acpi_buffer input = { sizeof(dummy), &dummy };
+ struct acpi_buffer output = { sizeof(obj), &obj };
+
+ status = wmi_evaluate_method(PEAQ_DOLBY_BUTTON_GUID, 0,
+ PEAQ_DOLBY_BUTTON_METHOD_ID,
+ &input, &output);
+ if (ACPI_FAILURE(status))
+ return;
+
+ if (obj.type != ACPI_TYPE_INTEGER) {
+ dev_err(&peaq_poll_dev->input->dev,
+ "Error WMBC did not return an integer\n");
+ return;
+ }
+
+ if (peaq_ignore_events_counter && peaq_ignore_events_counter--)
+ return;
+
+ if (obj.integer.value) {
+ input_event(peaq_poll_dev->input, EV_KEY, KEY_SOUND, 1);
+ input_sync(peaq_poll_dev->input);
+ input_event(peaq_poll_dev->input, EV_KEY, KEY_SOUND, 0);
+ input_sync(peaq_poll_dev->input);
+ peaq_ignore_events_counter = max(1u,
+ PEAQ_POLL_IGNORE_MS / peaq_poll_dev->poll_interval);
+ }
+}
+
+/* Some other devices (Shuttle XS35) use the same WMI GUID for other purposes */
+static const struct dmi_system_id peaq_dmi_table[] __initconst = {
+ {
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "PEAQ"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "PEAQ PMM C1010 MD99187"),
+ },
+ },
+ {}
+};
+
+static int __init peaq_wmi_init(void)
+{
+ /* WMI GUID is not unique, also check for a DMI match */
+ if (!dmi_check_system(peaq_dmi_table))
+ return -ENODEV;
+
+ if (!wmi_has_guid(PEAQ_DOLBY_BUTTON_GUID))
+ return -ENODEV;
+
+ peaq_poll_dev = input_allocate_polled_device();
+ if (!peaq_poll_dev)
+ return -ENOMEM;
+
+ peaq_poll_dev->poll = peaq_wmi_poll;
+ peaq_poll_dev->poll_interval = PEAQ_POLL_INTERVAL_MS;
+ peaq_poll_dev->poll_interval_max = PEAQ_POLL_MAX_MS;
+ peaq_poll_dev->input->name = "PEAQ WMI hotkeys";
+ peaq_poll_dev->input->phys = "wmi/input0";
+ peaq_poll_dev->input->id.bustype = BUS_HOST;
+ input_set_capability(peaq_poll_dev->input, EV_KEY, KEY_SOUND);
+
+ return input_register_polled_device(peaq_poll_dev);
+}
+
+static void __exit peaq_wmi_exit(void)
+{
+ input_unregister_polled_device(peaq_poll_dev);
+}
+
+module_init(peaq_wmi_init);
+module_exit(peaq_wmi_exit);
+
+MODULE_DESCRIPTION("PEAQ 2-in-1 WMI hotkey driver");
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_LICENSE("GPL");