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-rw-r--r--drivers/platform/chrome/cros_ec.c116
-rw-r--r--drivers/platform/chrome/cros_ec.h4
-rw-r--r--drivers/platform/chrome/cros_ec_lpc.c22
3 files changed, 116 insertions, 26 deletions
diff --git a/drivers/platform/chrome/cros_ec.c b/drivers/platform/chrome/cros_ec.c
index 5d36fbc75e1b..badc68bbae8c 100644
--- a/drivers/platform/chrome/cros_ec.c
+++ b/drivers/platform/chrome/cros_ec.c
@@ -321,17 +321,8 @@ void cros_ec_unregister(struct cros_ec_device *ec_dev)
EXPORT_SYMBOL(cros_ec_unregister);
#ifdef CONFIG_PM_SLEEP
-/**
- * cros_ec_suspend() - Handle a suspend operation for the ChromeOS EC device.
- * @ec_dev: Device to suspend.
- *
- * This can be called by drivers to handle a suspend event.
- *
- * Return: 0 on success or negative error code.
- */
-int cros_ec_suspend(struct cros_ec_device *ec_dev)
+static void cros_ec_send_suspend_event(struct cros_ec_device *ec_dev)
{
- struct device *dev = ec_dev->dev;
int ret;
u8 sleep_event;
@@ -343,7 +334,26 @@ int cros_ec_suspend(struct cros_ec_device *ec_dev)
if (ret < 0)
dev_dbg(ec_dev->dev, "Error %d sending suspend event to ec\n",
ret);
+}
+/**
+ * cros_ec_suspend_prepare() - Handle a suspend prepare operation for the ChromeOS EC device.
+ * @ec_dev: Device to suspend.
+ *
+ * This can be called by drivers to handle a suspend prepare stage of suspend.
+ *
+ * Return: 0 always.
+ */
+int cros_ec_suspend_prepare(struct cros_ec_device *ec_dev)
+{
+ cros_ec_send_suspend_event(ec_dev);
+ return 0;
+}
+EXPORT_SYMBOL(cros_ec_suspend_prepare);
+
+static void cros_ec_disable_irq(struct cros_ec_device *ec_dev)
+{
+ struct device *dev = ec_dev->dev;
if (device_may_wakeup(dev))
ec_dev->wake_enabled = !enable_irq_wake(ec_dev->irq);
else
@@ -351,7 +361,35 @@ int cros_ec_suspend(struct cros_ec_device *ec_dev)
disable_irq(ec_dev->irq);
ec_dev->suspended = true;
+}
+/**
+ * cros_ec_suspend_late() - Handle a suspend late operation for the ChromeOS EC device.
+ * @ec_dev: Device to suspend.
+ *
+ * This can be called by drivers to handle a suspend late stage of suspend.
+ *
+ * Return: 0 always.
+ */
+int cros_ec_suspend_late(struct cros_ec_device *ec_dev)
+{
+ cros_ec_disable_irq(ec_dev);
+ return 0;
+}
+EXPORT_SYMBOL(cros_ec_suspend_late);
+
+/**
+ * cros_ec_suspend() - Handle a suspend operation for the ChromeOS EC device.
+ * @ec_dev: Device to suspend.
+ *
+ * This can be called by drivers to handle a suspend event.
+ *
+ * Return: 0 always.
+ */
+int cros_ec_suspend(struct cros_ec_device *ec_dev)
+{
+ cros_ec_send_suspend_event(ec_dev);
+ cros_ec_disable_irq(ec_dev);
return 0;
}
EXPORT_SYMBOL(cros_ec_suspend);
@@ -370,22 +408,11 @@ static void cros_ec_report_events_during_suspend(struct cros_ec_device *ec_dev)
}
}
-/**
- * cros_ec_resume() - Handle a resume operation for the ChromeOS EC device.
- * @ec_dev: Device to resume.
- *
- * This can be called by drivers to handle a resume event.
- *
- * Return: 0 on success or negative error code.
- */
-int cros_ec_resume(struct cros_ec_device *ec_dev)
+static void cros_ec_send_resume_event(struct cros_ec_device *ec_dev)
{
int ret;
u8 sleep_event;
- ec_dev->suspended = false;
- enable_irq(ec_dev->irq);
-
sleep_event = (!IS_ENABLED(CONFIG_ACPI) || pm_suspend_via_firmware()) ?
HOST_SLEEP_EVENT_S3_RESUME :
HOST_SLEEP_EVENT_S0IX_RESUME;
@@ -394,6 +421,24 @@ int cros_ec_resume(struct cros_ec_device *ec_dev)
if (ret < 0)
dev_dbg(ec_dev->dev, "Error %d sending resume event to ec\n",
ret);
+}
+
+/**
+ * cros_ec_resume_complete() - Handle a resume complete operation for the ChromeOS EC device.
+ * @ec_dev: Device to resume.
+ *
+ * This can be called by drivers to handle a resume complete stage of resume.
+ */
+void cros_ec_resume_complete(struct cros_ec_device *ec_dev)
+{
+ cros_ec_send_resume_event(ec_dev);
+}
+EXPORT_SYMBOL(cros_ec_resume_complete);
+
+static void cros_ec_enable_irq(struct cros_ec_device *ec_dev)
+{
+ ec_dev->suspended = false;
+ enable_irq(ec_dev->irq);
if (ec_dev->wake_enabled)
disable_irq_wake(ec_dev->irq);
@@ -403,8 +448,35 @@ int cros_ec_resume(struct cros_ec_device *ec_dev)
* suspend. This way the clients know what to do with them.
*/
cros_ec_report_events_during_suspend(ec_dev);
+}
+/**
+ * cros_ec_resume_early() - Handle a resume early operation for the ChromeOS EC device.
+ * @ec_dev: Device to resume.
+ *
+ * This can be called by drivers to handle a resume early stage of resume.
+ *
+ * Return: 0 always.
+ */
+int cros_ec_resume_early(struct cros_ec_device *ec_dev)
+{
+ cros_ec_enable_irq(ec_dev);
+ return 0;
+}
+EXPORT_SYMBOL(cros_ec_resume_early);
+/**
+ * cros_ec_resume() - Handle a resume operation for the ChromeOS EC device.
+ * @ec_dev: Device to resume.
+ *
+ * This can be called by drivers to handle a resume event.
+ *
+ * Return: 0 always.
+ */
+int cros_ec_resume(struct cros_ec_device *ec_dev)
+{
+ cros_ec_enable_irq(ec_dev);
+ cros_ec_send_resume_event(ec_dev);
return 0;
}
EXPORT_SYMBOL(cros_ec_resume);
diff --git a/drivers/platform/chrome/cros_ec.h b/drivers/platform/chrome/cros_ec.h
index 2b2574236030..6b95f1e0bace 100644
--- a/drivers/platform/chrome/cros_ec.h
+++ b/drivers/platform/chrome/cros_ec.h
@@ -16,7 +16,11 @@ int cros_ec_register(struct cros_ec_device *ec_dev);
void cros_ec_unregister(struct cros_ec_device *ec_dev);
int cros_ec_suspend(struct cros_ec_device *ec_dev);
+int cros_ec_suspend_late(struct cros_ec_device *ec_dev);
+int cros_ec_suspend_prepare(struct cros_ec_device *ec_dev);
int cros_ec_resume(struct cros_ec_device *ec_dev);
+int cros_ec_resume_early(struct cros_ec_device *ec_dev);
+void cros_ec_resume_complete(struct cros_ec_device *ec_dev);
irqreturn_t cros_ec_irq_thread(int irq, void *data);
diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c
index 897090f0f26e..f0f3d3d56157 100644
--- a/drivers/platform/chrome/cros_ec_lpc.c
+++ b/drivers/platform/chrome/cros_ec_lpc.c
@@ -547,22 +547,36 @@ MODULE_DEVICE_TABLE(dmi, cros_ec_lpc_dmi_table);
static int cros_ec_lpc_prepare(struct device *dev)
{
struct cros_ec_device *ec_dev = dev_get_drvdata(dev);
-
- return cros_ec_suspend(ec_dev);
+ return cros_ec_suspend_prepare(ec_dev);
}
static void cros_ec_lpc_complete(struct device *dev)
{
struct cros_ec_device *ec_dev = dev_get_drvdata(dev);
- cros_ec_resume(ec_dev);
+ cros_ec_resume_complete(ec_dev);
+}
+
+static int cros_ec_lpc_suspend_late(struct device *dev)
+{
+ struct cros_ec_device *ec_dev = dev_get_drvdata(dev);
+
+ return cros_ec_suspend_late(ec_dev);
+}
+
+static int cros_ec_lpc_resume_early(struct device *dev)
+{
+ struct cros_ec_device *ec_dev = dev_get_drvdata(dev);
+
+ return cros_ec_resume_early(ec_dev);
}
#endif
static const struct dev_pm_ops cros_ec_lpc_pm_ops = {
#ifdef CONFIG_PM_SLEEP
.prepare = cros_ec_lpc_prepare,
- .complete = cros_ec_lpc_complete
+ .complete = cros_ec_lpc_complete,
#endif
+ SET_LATE_SYSTEM_SLEEP_PM_OPS(cros_ec_lpc_suspend_late, cros_ec_lpc_resume_early)
};
static struct platform_driver cros_ec_lpc_driver = {