qcacld-3.0: Add support for registering runtime PM APIs

Add support for registering runtime PM APIs in PLD.

CRs-Fixed: 1010156
Change-Id: I8747edd0f8fc4bd79f72f7fba4b65d8c6ebd6887

core/pld/inc/pld_common.h

@@ -268,6 +268,12 @@ struct pld_soc_info {
  *          is enabled
  * @modem_status: optional operation, will be called when platform driver
  *                sending modem power status to WLAN FW
+ * @runtime_suspend: optional operation, prepare the device for a condition
+ *                   in which it won't be able to communicate with the CPU(s)
+ *                   and RAM due to power management.
+ * @runtime_resume: optional operation, put the device into the fully
+ *                  active state in response to a wakeup event generated by
+ *                  hardware or at the request of software.
  */
 struct pld_driver_ops {
 	int (*probe)(struct device *dev,
@@ -290,6 +296,10 @@ struct pld_driver_ops {
 	void (*modem_status)(struct device *dev,
 			     enum pld_bus_type bus_type,
 			     int state);
+	int (*runtime_suspend)(struct device *dev,
+			       enum pld_bus_type bus_type);
+	int (*runtime_resume)(struct device *dev,
+			      enum pld_bus_type bus_type);
 };
 
 int pld_init(void);

core/pld/src/pld_pcie.c

@@ -198,6 +198,48 @@ static void pld_pcie_notify_handler(struct pci_dev *pdev, int state)
 		pld_context->ops->modem_status(&pdev->dev,
 					       PLD_BUS_TYPE_PCIE, state);
 }
+
+#ifdef FEATURE_RUNTIME_PM
+/**
+ * pld_pcie_runtime_suspend() - PM runtime suspend
+ * @pdev: PCIE device
+ *
+ * PM runtime suspend callback function.
+ *
+ * Return: int
+ */
+static int pld_pcie_runtime_suspend(struct pci_dev *pdev)
+{
+	struct pld_context *pld_context;
+
+	pld_context = pld_get_global_context();
+	if (pld_context->ops->runtime_suspend)
+		return pld_context->ops->runtime_suspend(&pdev->dev,
+							 PLD_BUS_TYPE_PCIE);
+
+	return -ENODEV;
+}
+
+/**
+ * pld_pcie_runtime_resume() - PM runtime resume
+ * @pdev: PCIE device
+ *
+ * PM runtime resume callback function.
+ *
+ * Return: int
+ */
+static int pld_pcie_runtime_resume(struct pci_dev *pdev)
+{
+	struct pld_context *pld_context;
+
+	pld_context = pld_get_global_context();
+	if (pld_context->ops->runtime_resume)
+		return pld_context->ops->runtime_resume(&pdev->dev,
+							PLD_BUS_TYPE_PCIE);
+
+	return -ENODEV;
+}
+#endif
 #endif
 
 /**
@@ -246,6 +288,13 @@ static struct pci_device_id pld_pcie_id_table[] = {
 };
 
 #ifdef CONFIG_CNSS
+#ifdef FEATURE_RUNTIME_PM
+struct cnss_wlan_runtime_ops runtime_pm_ops = {
+	.runtime_suspend = pld_pcie_runtime_suspend,
+	.runtime_resume = pld_pcie_runtime_resume,
+};
+#endif
+
 struct cnss_wlan_driver pld_pcie_ops = {
 	.name       = "pld_pcie",
 	.id_table   = pld_pcie_id_table,
@@ -259,6 +308,9 @@ struct cnss_wlan_driver pld_pcie_ops = {
 	.suspend    = pld_pcie_suspend,
 	.resume     = pld_pcie_resume,
 #endif
+#ifdef FEATURE_RUNTIME_PM
+	.runtime_ops = &runtime_pm_ops,
+#endif
 };
 
 /**