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Commit ef884112 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

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



Allow the intel-hid 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 91f9e850

drivers/platform/x86/intel-hid.c

+35 −5
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");
@@ -75,6 +76,7 @@ static const struct key_entry intel_array_keymap[] = { 
struct intel_hid_priv {

	struct input_dev *input_dev;

	struct input_dev *array;

	bool wakeup_mode;

};



static int intel_hid_set_enable(struct device *device, bool enable)
@@ -116,23 +118,37 @@ static void intel_button_array_enable(struct device *device, bool enable) 
		dev_warn(device, "failed to set button capability\n");

}



static int intel_hid_pm_prepare(struct device *device)

{

	struct intel_hid_priv *priv = dev_get_drvdata(device);



	priv->wakeup_mode = true;

	return 0;

}



static int intel_hid_pl_suspend_handler(struct device *device)

{

	if (pm_suspend_via_firmware()) {

		intel_hid_set_enable(device, false);

		intel_button_array_enable(device, false);



	}

	return 0;

}



static int intel_hid_pl_resume_handler(struct device *device)

{

	struct intel_hid_priv *priv = dev_get_drvdata(device);



	priv->wakeup_mode = false;

	if (pm_resume_via_firmware()) {

		intel_hid_set_enable(device, true);

		intel_button_array_enable(device, true);



	}

	return 0;

}



static const struct dev_pm_ops intel_hid_pl_pm_ops = {

	.prepare = intel_hid_pm_prepare,

	.freeze  = intel_hid_pl_suspend_handler,

	.thaw  = intel_hid_pl_resume_handler,

	.restore  = intel_hid_pl_resume_handler,
@@ -186,6 +202,19 @@ static void notify_handler(acpi_handle handle, u32 event, void *context) 
	unsigned long long ev_index;

	acpi_status status;



	if (priv->wakeup_mode) {

		/* Wake up on 5-button array events only. */

		if (event == 0xc0 || !priv->array)

			return;



		if (sparse_keymap_entry_from_scancode(priv->array, event))

			pm_wakeup_hard_event(&device->dev);

		else

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



		return;

	}



	/* 0xC0 is for HID events, other values are for 5 button array */

	if (event != 0xc0) {

		if (!priv->array ||
@@ -270,6 +299,7 @@ static int intel_hid_probe(struct platform_device *device) 
				 "failed to enable HID power button\n");

	}



	device_init_wakeup(&device->dev, true);

	return 0;



err_remove_notify: