[PATCH 1/3] platform: x86: intel-vbtn: Wake up the system from suspend-to-idle

Rafael J. Wysocki
2017-05-31T23:35:55Z

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

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: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/platform/x86/intel-vbtn.c | 39 +++++++++++++++++++++++++++++++++++---
1 file changed, 36 insertions(+), 3 deletions(-)

Index: linux-pm/drivers/platform/x86/intel-vbtn.c
===================================================================
--- linux-pm.orig/drivers/platform/x86/intel-vbtn.c
+++ linux-pm/drivers/platform/x86/intel-vbtn.c
@@ -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

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 h
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 platf
if (ACPI_FAILURE(status))
return -EBUSY;

+ device_init_wakeup(&device->dev, true);
return 0;
}

@@ -125,10 +134,34 @@ static int intel_vbtn_remove(struct plat
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,