Merge pull request #15706 from aabadie/pr/cpu/stm32_mco_kconfig

cpu/stm32: model MCO clock configuration in kconfig

cpu/stm32/kconfigs/Kconfig.clk

@@ -5,6 +5,11 @@
 # directory for more details.
 #
 
+config CLOCK_HAS_NO_MCO_PRE
+    bool
+    help
+        Indicates that the CPU has no MCO prescaler
+
 menu "STM32 clock configuration"
     depends on !CPU_FAM_F2 && !CPU_FAM_F4 && !CPU_FAM_F7
 
@@ -368,4 +373,86 @@ config CLOCK_APB2_DIV
     default 8 if CLOCK_APB2_DIV_8
     default 16 if CLOCK_APB2_DIV_16
 
+if CPU_FAM_F0 || CPU_FAM_F1 || CPU_FAM_F3 || CPU_FAM_G0 || CPU_FAM_G4 || CPU_FAM_L0 || CPU_FAM_L1 || CPU_FAM_L4 || CPU_FAM_WB
+config CLOCK_ENABLE_MCO
+    bool "Enable MCU Clock Output (MCO) on PA8"
+
+choice
+bool "MCO source"
+depends on CLOCK_ENABLE_MCO
+default CLOCK_MCO_USE_PLLCLK
+
+config CLOCK_MCO_USE_PLLCLK
+    bool "Use PLLCLK as MCO source"
+
+config CLOCK_MCO_USE_HSE
+    bool "Use HSE as MCO source"
+
+config CLOCK_MCO_USE_HSI
+    bool "Use HSI as MCO source"
+
+config CLOCK_MCO_USE_LSE
+    bool "Use LSE as MCO source"
+    depends on CPU_FAM_G0 || CPU_FAM_G4 || CPU_FAM_L0 || CPU_FAM_L1 || CPU_FAM_L4 || CPU_FAM_WB
+
+config CLOCK_MCO_USE_LSI
+    bool "Use LSI as MCO source"
+    depends on CPU_FAM_G0 || CPU_FAM_G4 || CPU_FAM_L0 || CPU_FAM_L1 || CPU_FAM_L4 || CPU_FAM_WB
+
+config CLOCK_MCO_USE_MSI
+    bool "Use MSI as MCO source"
+    depends on CPU_FAM_L0 || CPU_FAM_L1 || CPU_FAM_L4 || CPU_FAM_WB
+
+config CLOCK_MCO_USE_SYSCLK
+    bool "Use SYSCLK as MCO source"
+
+endchoice
+
+choice
+bool "MCO prescaler"
+depends on !CLOCK_HAS_NO_MCO_PRE && CLOCK_ENABLE_MCO
+default CLOCK_MCO_PRE_1
+
+config CLOCK_MCO_PRE_1
+    bool "Divide MCO by 1"
+
+config CLOCK_MCO_PRE_2
+    bool "Divide MCO by 2"
+
+config CLOCK_MCO_PRE_4
+    bool "Divide MCO by 4"
+
+config CLOCK_MCO_PRE_8
+    bool "Divide MCO by 8"
+
+config CLOCK_MCO_PRE_16
+    bool "Divide MCO by 16"
+
+config CLOCK_MCO_PRE_32
+    bool "Divide MCO by 32"
+    depends on !CPU_FAM_G4 && !CPU_FAM_L0 && !CPU_FAM_L1 && !CPU_FAM_L4 && !CPU_FAM_WB
+
+config CLOCK_MCO_PRE_64
+    bool "Divide MCO by 64"
+    depends on !CPU_FAM_G4 && !CPU_FAM_L0 && !CPU_FAM_L1 && !CPU_FAM_L4 && !CPU_FAM_WB
+
+config CLOCK_MCO_PRE_128
+    bool "Divide MCO by 128"
+    depends on !CPU_FAM_G4 && !CPU_FAM_L0 && !CPU_FAM_L1 && !CPU_FAM_L4 && !CPU_FAM_WB
+
+endchoice
+
+config CLOCK_MCO_PRE
+    int
+    default 2 if CLOCK_MCO_PRE_2
+    default 4 if CLOCK_MCO_PRE_4
+    default 8 if CLOCK_MCO_PRE_8
+    default 16 if CLOCK_MCO_PRE_16
+    default 32 if CLOCK_MCO_PRE_32
+    default 64 if CLOCK_MCO_PRE_64
+    default 128 if CLOCK_MCO_PRE_128
+    default 1
+
+endif  # CPU_FAM_F0 || CPU_FAM_F1 || CPU_FAM_F3 || CPU_FAM_G0 || CPU_FAM_G4 || CPU_FAM_L0 || CPU_FAM_L1 || CPU_FAM_L4 || CPU_FAM_WB
+
 endmenu

cpu/stm32/kconfigs/f0/Kconfig.lines

@@ -17,6 +17,7 @@ config CPU_LINE_STM32F030X6
 config CPU_LINE_STM32F030X8
     bool
     select CPU_FAM_F0
+    select CLOCK_HAS_NO_MCO_PRE
 
 config CPU_LINE_STM32F030XC
     bool
@@ -41,10 +42,12 @@ config CPU_LINE_STM32F048XX
 config CPU_LINE_STM32F051X8
     bool
     select CPU_FAM_F0
+    select CLOCK_HAS_NO_MCO_PRE
 
 config CPU_LINE_STM32F058XX
     bool
     select CPU_FAM_F0
+    select CLOCK_HAS_NO_MCO_PRE
 
 config CPU_LINE_STM32F070X6
     bool

cpu/stm32/kconfigs/f1/Kconfig

@@ -15,6 +15,7 @@ config CPU_FAM_F1
     select HAS_PERIPH_FLASHPAGE_RAW
     select HAS_PERIPH_WDT
     select HAS_BOOTLOADER_STM32
+    select CLOCK_HAS_NO_MCO_PRE
 
 config CPU_FAM
     default "f1" if CPU_FAM_F1

cpu/stm32/kconfigs/f3/Kconfig.lines

@@ -21,6 +21,7 @@ config CPU_LINE_STM32F302X8
 config CPU_LINE_STM32F302XC
     bool
     select CPU_FAM_F3
+    select CLOCK_HAS_NO_MCO_PRE
 
 config CPU_LINE_STM32F302XE
     bool
@@ -34,6 +35,7 @@ config CPU_LINE_STM32F303XC
     bool
     select CPU_FAM_F3
     select HAS_CORTEXM_MPU
+    select CLOCK_HAS_NO_MCO_PRE
 
 config CPU_LINE_STM32F303XE
     bool
@@ -55,14 +57,17 @@ config CPU_LINE_STM32F334X8
 config CPU_LINE_STM32F358XX
     bool
     select CPU_FAM_F3
+    select CLOCK_HAS_NO_MCO_PRE
 
 config CPU_LINE_STM32F373XC
     bool
     select CPU_FAM_F3
+    select CLOCK_HAS_NO_MCO_PRE
 
 config CPU_LINE_STM32F378XX
     bool
     select CPU_FAM_F3
+    select CLOCK_HAS_NO_MCO_PRE
 
 config CPU_LINE_STM32F398XX
     bool