os/board/rtl8730e: Prepare PM for GPIO

- Prepare PM for GPIO

os/arch/arm/src/amebasmart/amebasmart_gpio_lowerhalf.c

@@ -72,6 +72,15 @@
 #include "gpio_irq_ex_api.h"
 #include <tinyara/kmalloc.h>
 
+#ifdef CONFIG_PM
+#include <tinyara/pm/pm.h>
+#endif
+
+/* Power management definitions */
+#if defined(CONFIG_PM) && !defined(CONFIG_RTL8730E_PM_GPIO_ACTIVITY)
+#define CONFIG_RTL8730E_PM_GPIO_ACTIVITY  10
+#endif
+
 /****************************************************************************
  * Private Types
  ****************************************************************************/
@@ -86,6 +95,22 @@ struct amebasmart_lowerhalf_s {
 	gpio_handler_t handler;
 };
 
+#ifdef CONFIG_PM
+static void amebasmart_gpio_pmnotify(FAR struct pm_callback_s *cb, int domain,
+										enum pm_state_e pmstate);
+static int  amebasmart_gpio_pmprepare(FAR struct pm_callback_s *cb, int domain,
+										enum pm_state_e pmstate);
+static struct
+{
+	struct pm_callback_s pm_cb;
+} g_gpiopm =
+	{
+		.pm_cb.name = "rtl8730e_gpio",
+		.pm_cb.notify  = amebasmart_gpio_pmnotify,
+		.pm_cb.prepare = amebasmart_gpio_pmprepare,
+	};
+#endif
+
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
@@ -221,6 +246,27 @@ static const struct gpio_ops_s amebasmart_gpio_ops = {
 	.enable = amebasmart_gpio_enable,
 };
 
+#ifdef CONFIG_PM
+static uint32_t rtk_gpio_suspend(uint32_t expected_idle_time, void *param)
+{
+	(void)expected_idle_time;
+	(void)param;
+
+	gpio_toggle_clck(0);
+	return 1;
+}
+
+static uint32_t rtk_gpio_resume(uint32_t expected_idle_time, void *param)
+{
+	(void)expected_idle_time;
+	(void)param;
+
+	gpio_toggle_clck(1);
+	pm_activity(PM_IDLE_DOMAIN, CONFIG_RTL8730E_PM_GPIO_ACTIVITY);
+	return 1;
+}
+#endif
+
 /****************************************************************************
  * Public Functions
  ****************************************************************************/
@@ -262,3 +308,110 @@ FAR struct gpio_lowerhalf_s *amebasmart_gpio_lowerhalf(u32 pinname, u32 pinmode,
 	lower->ops = &amebasmart_gpio_ops;
 	return (struct gpio_lowerhalf_s *)lower;
 }
+
+/****************************************************************************
+ * Name: amebasmart_gpio_pmnotify
+ *
+ * Description:
+ *   Notify the driver of new power state. This callback is  called after
+ *   all drivers have had the opportunity to prepare for the new power state.
+ *
+ * Input Parameters:
+ *
+ *    cb - Returned to the driver. The driver version of the callback
+ *         structure may include additional, driver-specific state data at
+ *         the end of the structure.
+ *
+ *    pmstate - Identifies the new PM state
+ *
+ * Returned Value:
+ *   None - The driver already agreed to transition to the low power
+ *   consumption state when when it returned OK to the prepare() call.
+ *
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_PM
+static void amebasmart_gpio_pmnotify(FAR struct pm_callback_s *cb, int domain,
+                                   enum pm_state_e pmstate)
+{
+	switch (pmstate)
+	{
+		case PM_NORMAL:
+			pmu_unregister_sleep_callback(PMU_GPIO_DEVICE);
+			break;
+		case PM_IDLE:
+		case PM_STANDBY:
+			break;
+		case PM_SLEEP:
+			pmu_register_sleep_callback(PMU_GPIO_DEVICE, (PSM_HOOK_FUN)rtk_gpio_suspend, NULL, (PSM_HOOK_FUN)rtk_gpio_resume, NULL);
+			break;
+		default:
+			break;
+	}
+
+	return;
+}
+#endif
+
+/****************************************************************************
+ * Name: amebasmart_gpio_pmprepare
+ *
+ * Description:
+ *   Request the driver to prepare for a new power state. This is a warning
+ *   that the system is about to enter into a new power state. The driver
+ *   should begin whatever operations that may be required to enter power
+ *   state. The driver may abort the state change mode by returning a
+ *   non-zero value from the callback function.
+ *
+ * Input Parameters:
+ *
+ *    cb - Returned to the driver. The driver version of the callback
+ *         structure may include additional, driver-specific state data at
+ *         the end of the structure.
+ *
+ *    pmstate - Identifies the new PM state
+ *
+ * Returned Value:
+ *   Zero - (OK) means the event was successfully processed and that the
+ *          driver is prepared for the PM state change.
+ *
+ *   Non-zero - means that the driver is not prepared to perform the tasks
+ *              needed achieve this power setting and will cause the state
+ *              change to be aborted. NOTE: The prepare() method will also
+ *              be called when reverting from lower back to higher power
+ *              consumption modes (say because another driver refused a
+ *              lower power state change). Drivers are not permitted to
+ *              return non-zero values when reverting back to higher power
+ *              consumption modes!
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_PM
+static int amebasmart_gpio_pmprepare(FAR struct pm_callback_s *cb, int domain, enum pm_state_e pmstate)
+{
+	switch (pmstate)
+	{
+		case PM_NORMAL:
+		case PM_IDLE:
+		case PM_STANDBY:
+		case PM_SLEEP:
+			break;
+		default:
+			break;
+	}
+
+	return OK;
+}
+#endif
+
+#ifdef CONFIG_PM
+void gpio_pminitialize(void)
+{
+	int ret;
+	/* Register to receive power management callbacks */
+	ret = pm_register(&g_gpiopm.pm_cb);
+	DEBUGASSERT(ret == OK);
+	UNUSED(ret);
+}
+#endif

os/board/rtl8730e/src/component/mbed/targets/hal/rtl8730e/gpio_api.c

@@ -231,6 +231,13 @@ void gpio_deinit(gpio_t *obj)
 {
 	GPIO_DeInit(obj->pin);
 }
+
+#ifdef CONFIG_PM
+void gpio_toggle_clck(bool is_lsapb)
+{
+  (is_lsapb == 1) ? RCC_PeriphClockSource_GPIO(CKSL_GPIO_LS_APB) : RCC_PeriphClockSource_GPIO(CKSL_GPIO_32K);
+}
+#endif
 /**
   * @}
   */

os/board/rtl8730e/src/component/soc/amebad2/misc/ameba_tizenrt_pmu.h

@@ -23,6 +23,7 @@ typedef enum {
 	PMU_BT_DEVICE	= 17,
 	PMU_VAD_DEVICE	= 18,
 	PMU_SPI_DEVICE   = 19,
+	PMU_GPIO_DEVICE  = 20,
 
 	PMU_MAX				= 31
 } PMU_DEVICE;

os/board/rtl8730e/src/rtl8730e_boot.c

@@ -225,7 +225,7 @@ void board_gpio_initialize(void)
 		u32 pinmode;
 		u32 pinpull;
 	} pins[] = {
-
+				{PA_23, PIN_INPUT, PullNone},
 		/* NOTE: Do not open pins not for GPIO usage. E.g uart,SPI pins
 		Loguart pins
 		*/
@@ -298,6 +298,9 @@ void board_gpio_initialize(void)
 		lower = amebasmart_gpio_lowerhalf(pins[i].pinname, pins[i].pinmode, pins[i].pinpull);
 		gpio_register(pins[i].pinname, lower);
 	}
+#ifdef CONFIG_PM
+	gpio_pminitialize();
+#endif
 #endif
 }