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

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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: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Rafael J. Wysocki 2017-06-08 02:16:13 +02:00
parent 91f9e850d4
commit ef884112e5
1 changed files with 35 additions and 5 deletions
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40
drivers/platform/x86/intel-hid.c
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@ -23,6 +23,7 @@
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/input/sparse-keymap.h> #include <linux/input/sparse-keymap.h>
#include <linux/acpi.h> #include <linux/acpi.h>
#include <linux/suspend.h>
#include <acpi/acpi_bus.h> #include <acpi/acpi_bus.h>
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
@ -75,6 +76,7 @@ static const struct key_entry intel_array_keymap[] = {
struct intel_hid_priv { struct intel_hid_priv {
struct input_dev *input_dev; struct input_dev *input_dev;
struct input_dev *array; struct input_dev *array;
bool wakeup_mode;
}; };
static int intel_hid_set_enable(struct device *device, bool enable) 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"); 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) static int intel_hid_pl_suspend_handler(struct device *device)
{ {
intel_hid_set_enable(device, false); if (pm_suspend_via_firmware()) {
intel_button_array_enable(device, false); intel_hid_set_enable(device, false);
intel_button_array_enable(device, false);
}
return 0; return 0;
} }
static int intel_hid_pl_resume_handler(struct device *device) static int intel_hid_pl_resume_handler(struct device *device)
{ {
intel_hid_set_enable(device, true); struct intel_hid_priv *priv = dev_get_drvdata(device);
intel_button_array_enable(device, true);
priv->wakeup_mode = false;
if (pm_resume_via_firmware()) {
intel_hid_set_enable(device, true);
intel_button_array_enable(device, true);
}
return 0; return 0;
} }
static const struct dev_pm_ops intel_hid_pl_pm_ops = { static const struct dev_pm_ops intel_hid_pl_pm_ops = {
.prepare = intel_hid_pm_prepare,
.freeze = intel_hid_pl_suspend_handler, .freeze = intel_hid_pl_suspend_handler,
.thaw = intel_hid_pl_resume_handler, .thaw = intel_hid_pl_resume_handler,
.restore = 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; unsigned long long ev_index;
acpi_status status; 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 */ /* 0xC0 is for HID events, other values are for 5 button array */
if (event != 0xc0) { if (event != 0xc0) {
if (!priv->array || if (!priv->array ||
@ -270,6 +299,7 @@ static int intel_hid_probe(struct platform_device *device)
"failed to enable HID power button\n"); "failed to enable HID power button\n");
} }
device_init_wakeup(&device->dev, true);
return 0; return 0;
err_remove_notify: err_remove_notify: