[bsp][wch] Support PM on CH32V208

bsp/wch/risc-v/ch32v208w-r0/.ci/attachconfig/ci.attachconfig.yml

@@ -10,3 +10,7 @@ devices.soft_i2c:
     - CONFIG_RT_SOFT_I2C2_SCL_PIN=32
     - CONFIG_RT_SOFT_I2C2_SDA_PIN=33
     - CONFIG_RT_SOFT_I2C2_BUS_NAME="swi2c2"
+
+devices.pm:
+  kconfig:
+    - CONFIG_BSP_USING_PM=y

bsp/wch/risc-v/ch32v208w-r0/.config

@@ -1468,6 +1468,7 @@ CONFIG_BSP_USING_UART1=y
 # CONFIG_BSP_USING_DAC is not set
 # CONFIG_BSP_USING_SOFT_I2C is not set
 # CONFIG_BSP_USING_SPI is not set
+# CONFIG_BSP_USING_PM is not set
 # CONFIG_BSP_USING_RTC is not set
 CONFIG_LSI_VALUE=40000
 # CONFIG_BSP_USING_IWDT is not set

bsp/wch/risc-v/ch32v208w-r0/board/Kconfig

@@ -258,6 +258,40 @@ menu "On-chip Peripheral Drivers"
         string
         default "swspi2" if RT_USING_SOFT_SPI2
 
+    menuconfig BSP_USING_PM
+        bool "Enable CH32V208 power management"
+        select RT_USING_PM
+        depends on !BSP_USING_RTC
+        default n
+
+        if BSP_USING_PM
+            choice BSP_PM_RTC_CLK_SEL
+                prompt "PM RTC clock source"
+                default BSP_PM_USING_LSI
+
+                config BSP_PM_USING_LSI
+                    bool "LSI (calibrated against HCLK)"
+
+                config BSP_PM_USING_LSE
+                    bool "LSE (32.768 kHz crystal)"
+            endchoice
+
+            config BSP_PM_BOOT_DELAY
+                int "Delay before enabling STOP (seconds)"
+                range 0 60
+                default 10
+
+            config BSP_PM_PARK_UNUSED_GPIO
+                bool "Park unused GPIO as analog inputs and disable SWJ"
+                depends on BSP_PM_BOOT_DELAY >= 10
+                default n
+                help
+                  Apply the PM measurement board's pin masks after the
+                  reflash window. Keep PA0, UART1 and the crystal pins.
+                  Adapt the masks before using other peripherals or GPIO
+                  wake sources.
+        endif
+
     config BSP_USING_RTC
         bool "Enable RTC"
         select RT_USING_RTC

bsp/wch/risc-v/ch32v208w-r0/board/SConscript

@@ -12,6 +12,9 @@ board.c
 software_irq.c
 ''')
 
+if GetDepend('BSP_USING_PM'):
+    src += ['drv_pm.c']
+
 path =  [cwd]
 
 group = DefineGroup('Drivers', src, depend = [''], CPPPATH = path)