drivers/pinmux: stm32: Enable PM_DEVICE_RUNTIME services

Add PM_DEVICE_RUNTIME support

Signed-off-by: Erwan Gouriou <[email protected]>

Author: erwango

drivers/pinmux/stm32/pinmux_stm32.c

@@ -22,6 +22,7 @@
 #include <gpio/gpio_stm32.h>
 #include <drivers/clock_control/stm32_clock_control.h>
 #include <pinmux/stm32/pinmux_stm32.h>
+#include <pm/device_runtime.h>
 
 #define GPIO_DEVICE(gpio_port)						\
 	COND_CODE_1(DT_NODE_HAS_STATUS(DT_NODELABEL(gpio_port), okay),	\
@@ -127,15 +128,27 @@ int stm32_dt_pinctrl_configure(const struct soc_gpio_pinctrl *pinctrl,
 			       STM32_DT_PINMUX_LINE(mux));
 		port_device = gpio_ports[STM32_PORT(pin)];
 
+#ifdef CONFIG_PM_DEVICE_RUNTIME
+		ret = pm_device_get_sync(port_device);
+#else
 		ret = gpio_stm32_clock_request(port_device, true);
+		/* Note, we don't use pm_constraint_foo functions here */
+		/* since idle period should not happen between clock_on */
+		/* and clock_off */
+#endif
+
 		if (ret != 0) {
 			return ret;
 		}
 
 		stm32_pin_configure(pin, func, STM32_DT_PINMUX_FUNC(mux));
+
+#ifdef CONFIG_PM_DEVICE_RUNTIME
+		ret = pm_device_put(port_device);
+#endif
 	}
 
-	return 0;
+	return ret;
 }
 
 #if DT_HAS_COMPAT_STATUS_OKAY(st_stm32f1_pinctrl)