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Commit 91f9e850 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

platform: x86: intel-vbtn: Wake up the system from suspend-to-idle 



Allow the intel-vbtn driver to wake up the system from suspend-to-idle
by configuring its platform device as a wakeup one by default and
switching it over to a system wakeup events triggering mode during
system suspend transitions.

Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
parent d07ff652

drivers/platform/x86/intel-vbtn.c

+36 −3
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
#include <linux/platform_device.h>

#include <linux/input/sparse-keymap.h>

#include <linux/acpi.h>

#include <linux/suspend.h>

#include <acpi/acpi_bus.h>



MODULE_LICENSE("GPL");
@@ -46,6 +47,7 @@ static const struct key_entry intel_vbtn_keymap[] = { 


struct intel_vbtn_priv {

	struct input_dev *input_dev;

	bool wakeup_mode;

};



static int intel_vbtn_input_setup(struct platform_device *device)
@@ -73,9 +75,15 @@ static void notify_handler(acpi_handle handle, u32 event, void *context) 
	struct platform_device *device = context;

	struct intel_vbtn_priv *priv = dev_get_drvdata(&device->dev);



	if (!sparse_keymap_report_event(priv->input_dev, event, 1, true))

		dev_info(&device->dev, "unknown event index 0x%x\n",

			 event);

	if (priv->wakeup_mode) {

		if (sparse_keymap_entry_from_scancode(priv->input_dev, event)) {

			pm_wakeup_hard_event(&device->dev);

			return;

		}

	} else if (sparse_keymap_report_event(priv->input_dev, event, 1, true)) {

		return;

	}

	dev_info(&device->dev, "unknown event index 0x%x\n", event);

}



static int intel_vbtn_probe(struct platform_device *device)
@@ -109,6 +117,7 @@ static int intel_vbtn_probe(struct platform_device *device) 
	if (ACPI_FAILURE(status))

		return -EBUSY;



	device_init_wakeup(&device->dev, true);

	return 0;

}
@@ -125,10 +134,34 @@ static int intel_vbtn_remove(struct platform_device *device) 
	return 0;

}



static int intel_vbtn_pm_prepare(struct device *dev)

{

	struct intel_vbtn_priv *priv = dev_get_drvdata(dev);



	priv->wakeup_mode = true;

	return 0;

}



static int intel_vbtn_pm_resume(struct device *dev)

{

	struct intel_vbtn_priv *priv = dev_get_drvdata(dev);



	priv->wakeup_mode = false;

	return 0;

}



static const struct dev_pm_ops intel_vbtn_pm_ops = {

	.prepare = intel_vbtn_pm_prepare,

	.resume = intel_vbtn_pm_resume,

	.restore = intel_vbtn_pm_resume,

	.thaw = intel_vbtn_pm_resume,

};



static struct platform_driver intel_vbtn_pl_driver = {

	.driver = {

		.name = "intel-vbtn",

		.acpi_match_table = intel_vbtn_ids,

		.pm = &intel_vbtn_pm_ops,

	},

	.probe = intel_vbtn_probe,

	.remove = intel_vbtn_remove,