Support LTE Hibernation mode

arch/arm/src/cxd56xx/cxd56_idle.c

@@ -116,11 +116,13 @@ static void up_idlepm(void)
             break;
 
           case PM_STANDBY:
-            cxd56_pmstandby(true);
+            /* Not supported yet */
+
             break;
 
           case PM_SLEEP:
-            cxd56_pmsleep();
+            /* Not supported yet */
+
             break;
 
           default:

boards/arm/cxd56xx/common/src/Make.defs

@@ -182,6 +182,10 @@ ifeq ($(CONFIG_BOARD_USBDEV_SERIALSTR),y)
   CSRCS += cxd56_usbdevserialstr.c
 endif
 
+ifeq ($(CONFIG_PM),y)
+  CSRCS += cxd56_pm.c
+endif
+
 DEPPATH += --dep-path src
 VPATH += :src
 CFLAGS += $(shell $(INCDIR) "$(CC)" $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board$(DELIM)src)

boards/arm/cxd56xx/common/src/cxd56_alt1250.c

@@ -38,6 +38,7 @@
 
 #include <arch/board/board.h>
 #include <arch/board/cxd56_alt1250.h>
+#include <arch/chip/pm.h>
 
 #include "cxd56_spi.h"
 #include "cxd56_dmac.h"
@@ -79,6 +80,8 @@
 
 static struct spi_dev_s *alt1250_poweron(void);
 static void alt1250_poweroff(void);
+static bool alt1250_powerstatus(void);
+static int  alt1250_hibernation_mode(bool enable);
 static void alt1250_reset(void);
 static void alt1250_irqattach(xcpt_t handler);
 static void alt1250_irqenable(bool enable);
@@ -95,6 +98,8 @@ static const struct alt1250_lower_s g_alt1250_lower =
 {
   .poweron      = alt1250_poweron,
   .poweroff     = alt1250_poweroff,
+  .powerstatus  = alt1250_powerstatus,
+  .hiber_mode   = alt1250_hibernation_mode,
   .reset        = alt1250_reset,
   .irqattach    = alt1250_irqattach,
   .irqenable    = alt1250_irqenable,
@@ -292,6 +297,43 @@ static void alt1250_poweroff(void)
   board_alt1250_poweroff();
 }
 
+/****************************************************************************
+ * Name: alt1250_powerstatus
+ *
+ * Description:
+ *   Get the power status for the Altair modem device on the board.
+ *
+ ****************************************************************************/
+
+static bool alt1250_powerstatus(void)
+{
+  return board_alt1250_powerstatus();
+}
+
+/****************************************************************************
+ * Name: alt1250_hibernation_mode
+ *
+ * Description:
+ *   Set power manager for entering hibernation mode.
+ *
+ ****************************************************************************/
+
+static int alt1250_hibernation_mode(bool enable)
+{
+  uint32_t bootmask = 0;
+
+  if (enable)
+    {
+      /* Set GPIO interrupt for wake-up */
+
+      bootmask = up_pm_get_bootmask();
+      bootmask |= PM_BOOT_COLD_GPIO;
+      up_pm_set_bootmask(bootmask);
+    }
+
+  return board_alt1250_powerkeep(enable);
+}
+
 /****************************************************************************
  * Name: alt1250_reset
  *

boards/arm/cxd56xx/common/src/cxd56_pm.c

@@ -0,0 +1,56 @@
+/****************************************************************************
+ * boards/arm/cxd56xx/common/src/cxd56_pm.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/power/pm.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: arm_pminitialize
+ *
+ * Description:
+ *   This function is called by MCU-specific logic at power-on reset in
+ *   order to provide one-time initialization the power management subsystem.
+ *   This function must be called *very* early in the initialization sequence
+ *   *before* any other device drivers are initialized (since they may
+ *   attempt to register with the power management subsystem).
+ *
+ * Input Parameters:
+ *   None.
+ *
+ * Returned Value:
+ *   None.
+ *
+ ****************************************************************************/
+
+void arm_pminitialize(void)
+{
+  /* Then initialize the NuttX power management subsystem proper */
+
+  pm_initialize();
+}
+

boards/arm/cxd56xx/spresense/include/board.h

@@ -216,6 +216,11 @@ enum board_power_device
 #define BOARD_POWEROFF_DEEP (0)
 #define BOARD_POWEROFF_COLD (1)
 
+/* Power domain definitions **********************************************/
+
+#define BOARD_PM_IDLE       (0)
+#define BOARD_PM_APPS       (1)
+
 /* CXD5247 audio control definitions ****************************************/
 
 #define CXD5247_XRST  PIN_SPI3_CS2_X

boards/arm/cxd56xx/spresense/include/cxd56_alt1250.h

@@ -88,6 +88,26 @@ void board_alt1250_poweron(void);
 
 void board_alt1250_poweroff(void);
 
+/****************************************************************************
+ * Name: board_alt1250_powerstatus
+ *
+ * Description:
+ *   Get the power status for the Altair modem device on the board.
+ *
+ ****************************************************************************/
+
+bool board_alt1250_powerstatus(void);
+
+/****************************************************************************
+ * Name: board_alt1250_powerkeep
+ *
+ * Description:
+ *   Set Modem power keep mode when turning off the board.
+ *
+ ****************************************************************************/
+
+int board_alt1250_powerkeep(bool enable);
+
 /****************************************************************************
  * Name: board_alt1250_reset
  *

boards/arm/cxd56xx/spresense/include/cxd56_power.h

@@ -202,6 +202,26 @@ bool board_xtal_power_monitor(void);
 
 int board_lna_power_control(bool en);
 
+/****************************************************************************
+ * Name: board_set_reset_gpo
+ *
+ * Description:
+ *   Set gpo to off when power off the board.
+ *
+ ****************************************************************************/
+
+int board_set_reset_gpo(int target);
+
+/****************************************************************************
+ * Name: board_unset_reset_gpo
+ *
+ * Description:
+ *   Keep gpo status when power off the board.
+ *
+ ****************************************************************************/
+
+int board_unset_reset_gpo(int target);
+
 #undef EXTERN
 #if defined(__cplusplus)
 }

boards/arm/cxd56xx/spresense/src/cxd56_alt1250_power.c

@@ -67,24 +67,6 @@ static sem_t g_wd_wait;
 
 void board_alt1250_poweron(void)
 {
-  /* Power on altair modem device */
-
-  cxd56_gpio_config(ALT1250_LTE_POWER_BUTTON, false);
-  cxd56_gpio_write(ALT1250_LTE_POWER_BUTTON, false);
-
-  cxd56_gpio_config(ALT1250_SHUTDOWN, false);
-
-  /* Workaround: Shutdown pin set to low before power on */
-
-  cxd56_gpio_write(ALT1250_SHUTDOWN, false);
-  nxsig_usleep(POWERON_DELAY_USEC);
-
-  cxd56_gpio_write(ALT1250_SHUTDOWN, true);
-
-  /* Workaround: Power button pin set to high before power on */
-
-  cxd56_gpio_write(ALT1250_LTE_POWER_BUTTON, true);
-
   board_power_control(POWER_LTE, true);
 }
 
@@ -98,12 +80,40 @@ void board_alt1250_poweron(void)
 
 void board_alt1250_poweroff(void)
 {
-  /* Power off Altair modem device */
-
   board_power_control(POWER_LTE, false);
+}
+
+/****************************************************************************
+ * Name: board_alt1250_powerstatus
+ *
+ * Description:
+ *   Get the power status for the Altair modem device on the board.
+ *
+ ****************************************************************************/
 
-  cxd56_gpio_write(ALT1250_SHUTDOWN, false);
-  cxd56_gpio_write(ALT1250_LTE_POWER_BUTTON, false);
+bool board_alt1250_powerstatus(void)
+{
+  return board_power_monitor(POWER_LTE);
+}
+
+/****************************************************************************
+ * Name: board_alt1250_powerkeep
+ *
+ * Description:
+ *   Set Modem power keep mode when turning off the board.
+ *
+ ****************************************************************************/
+
+int board_alt1250_powerkeep(bool enable)
+{
+  if (enable)
+    {
+      return board_unset_reset_gpo(POWER_LTE);
+    }
+  else
+    {
+      return board_set_reset_gpo(POWER_LTE);
+    }
 }
 
 /****************************************************************************
@@ -136,7 +146,7 @@ void board_alt1250_reset(void)
 
   /* Reset Altair modem device */
 
-  cxd56_gpio_write(ALT1250_SHUTDOWN, false);
+  board_alt1250_poweroff();
 
   /* ALT1250_SHUTDOWN should be low in the range 101usec to 100msec */
 
@@ -147,7 +157,7 @@ void board_alt1250_reset(void)
 
   nxsem_wait_uninterruptible(&g_wd_wait);
 
-  cxd56_gpio_write(ALT1250_SHUTDOWN, true);
+  board_alt1250_poweron();
 
   nxsem_destroy(&g_wd_wait);
 }