Counter_mcux_ctimer: Adds PM low-power recovery support

Enables Sleep mode (PM3) in RW61x for Ctimer.

Signed-off-by: Tsi-Chung Liew <[email protected]>

Author: tsi-chung

drivers/counter/counter_mcux_ctimer.c

@@ -11,6 +11,7 @@
 #include <zephyr/drivers/clock_control.h>
 #include <zephyr/dt-bindings/clock/mcux_lpc_syscon_clock.h>
 #include <zephyr/irq.h>
+#include <zephyr/pm/device.h>
 
 LOG_MODULE_REGISTER(mcux_ctimer, CONFIG_COUNTER_LOG_LEVEL);
 
@@ -248,7 +249,7 @@ static void mcux_lpc_ctimer_isr(const struct device *dev)
 #endif
 }
 
-static int mcux_lpc_ctimer_init(const struct device *dev)
+static int mcux_lpc_ctimer_init_common(const struct device *dev)
 {
 	const struct mcux_lpc_ctimer_config *config = dev->config;
 	struct mcux_lpc_ctimer_data *data = dev->data;
@@ -277,6 +278,32 @@ static int mcux_lpc_ctimer_init(const struct device *dev)
 	return 0;
 }
 
+static int mcux_lpc_ctimer_pm_action(const struct device *dev, enum pm_device_action action)
+{
+	switch (action) {
+	case PM_DEVICE_ACTION_RESUME:
+		break;
+	case PM_DEVICE_ACTION_SUSPEND:
+		break;
+	case PM_DEVICE_ACTION_TURN_OFF:
+		break;
+	case PM_DEVICE_ACTION_TURN_ON:
+		mcux_lpc_ctimer_init_common(dev);
+		break;
+	default:
+		return -ENOTSUP;
+	}
+	return 0;
+}
+
+static int mcux_lpc_ctimer_init(const struct device *dev)
+{
+	/* Rest of the init is done from the PM_DEVICE_TURN_ON action
+	 * which is invoked by pm_device_driver_init().
+	 */
+	return pm_device_driver_init(dev, mcux_lpc_ctimer_pm_action);
+}
+
 static DEVICE_API(counter, mcux_ctimer_driver_api) = {
 	.start = mcux_lpc_ctimer_start,
 	.stop = mcux_lpc_ctimer_stop,
@@ -306,8 +333,10 @@ static DEVICE_API(counter, mcux_ctimer_driver_api) = {
 		.prescale = DT_INST_PROP(id, prescale),				\
 		.irq_config_func = mcux_lpc_ctimer_irq_config_##id,	\
 	};                     \
+	PM_DEVICE_DT_INST_DEFINE(id, mcux_lpc_ctimer_pm_action);                                   \
 	static struct mcux_lpc_ctimer_data mcux_lpc_ctimer_data_##id;                              \
-	DEVICE_DT_INST_DEFINE(id, &mcux_lpc_ctimer_init, NULL, &mcux_lpc_ctimer_data_##id,         \
+	DEVICE_DT_INST_DEFINE(id, &mcux_lpc_ctimer_init, PM_DEVICE_DT_INST_GET(id),                \
+			      &mcux_lpc_ctimer_data_##id,                                          \
 			      &mcux_lpc_ctimer_config_##id, POST_KERNEL,                           \
 			      CONFIG_COUNTER_INIT_PRIORITY, &mcux_ctimer_driver_api);              \
 	static void mcux_lpc_ctimer_irq_config_##id(const struct device *dev)                      \