soc: Handle system suspend for LPI pinctrl

System suspend is not handled in lpi pinctrl driver.
Register to system ops to release lpass hw vote
before apps suspend.

CRs-Fixed: 2439988
Change-Id: I334a993ead5d2abec5286fb5812d67b795d03f3c
Signed-off-by: Laxminath Kasam <[email protected]>

soc/pinctrl-lpi.c

@@ -788,7 +788,44 @@ int lpi_pinctrl_runtime_suspend(struct device *dev)
 	return 0;
 }
 
+int lpi_pinctrl_suspend(struct device *dev)
+{
+	int ret = 0;
+
+	dev_dbg(dev, "%s: system suspend\n", __func__);
+
+	if ((!pm_runtime_enabled(dev) || !pm_runtime_suspended(dev))) {
+		ret = lpi_pinctrl_runtime_suspend(dev);
+		if (!ret) {
+			/*
+			 * Synchronize runtime-pm and system-pm states:
+			 * At this point, we are already suspended. If
+			 * runtime-pm still thinks its active, then
+			 * make sure its status is in sync with HW
+			 * status. The three below calls let the
+			 * runtime-pm know that we are suspended
+			 * already without re-invoking the suspend
+			 * callback
+			 */
+			pm_runtime_disable(dev);
+			pm_runtime_set_suspended(dev);
+			pm_runtime_enable(dev);
+		}
+	}
+
+	return ret;
+}
+
+int lpi_pinctrl_resume(struct device *dev)
+{
+	return 0;
+}
+
 static const struct dev_pm_ops lpi_pinctrl_dev_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(
+		lpi_pinctrl_suspend,
+		lpi_pinctrl_resume
+	)
 	SET_RUNTIME_PM_OPS(
 		lpi_pinctrl_runtime_suspend,
 		lpi_pinctrl_runtime_resume,