linux-kernel - [PATCH 2/2] platform/x86: surfacepro3: Support for wakeup from suspend-to-idle

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Date:   Wed, 10 Jan 2018 13:26:35 +0100
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Linux ACPI <linux-acpi@...r.kernel.org>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Darren Hart <dvhart@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        Valentin Manea <valy@....ro>
Subject: [PATCH 2/2] platform/x86: surfacepro3: Support for wakeup from suspend-to-idle

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Modify surface_button_notify() to make it wake up the system from
suspend-to-idle (by reporting "hard" wakeup events while suspended)
and add wakeup initialization to surface_button_add() for wakeup
events reported by this driver to work at all.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=198389
Reported-by: Valentin Manea <valy@....ro>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 drivers/platform/x86/surfacepro3_button.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linux-pm/drivers/platform/x86/surfacepro3_button.c
===================================================================
--- linux-pm.orig/drivers/platform/x86/surfacepro3_button.c
+++ linux-pm/drivers/platform/x86/surfacepro3_button.c
@@ -119,7 +119,7 @@ static void surface_button_notify(struct
 	if (key_code == KEY_RESERVED)
 		return;
 	if (pressed)
-		pm_wakeup_event(&device->dev, 0);
+		pm_wakeup_dev_event(&device->dev, 0, button->suspended);
 	if (button->suspended)
 		return;
 	input_report_key(input, key_code, pressed?1:0);
@@ -185,6 +185,8 @@ static int surface_button_add(struct acp
 	error = input_register_device(input);
 	if (error)
 		goto err_free_input;
+
+	device_init_wakeup(&device->dev, true);
 	dev_info(&device->dev,
 			"%s [%s]\n", name, acpi_device_bid(device));
 	return 0;