More info for the Shenzhou board configuration

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5109 42af7a65-404d-4744-a932-0658087f49c3

arch/arm/src/stm32/Kconfig

@@ -1562,13 +1562,32 @@ config STM32_MII
 	---help---
 		Support Ethernet MII interface.
 
+choice
+	prompt "MII clock configuration"
+	default STM32_MII_MCO if STM32_STM32F10XX
+	default STM32_MII_MCO1 if STM32_STM32F20XX || STM32_STM32F40XX
+	depends on STM32_MII
+
+config STM32_MII_MCO
+	bool "Use MC0 as MII clock"
+	depends on STM32_STM32F10XX
+	---help---
+		Use MCO to clock the MII interface.  Default:  Use MC0
+
+config STM32_MII_MCO1
+	bool "Use MC01 as MII clock"
+	depends on (STM32_STM32F20XX || STM32_STM32F40XX)
+	---help---
+		Use MCO1 to clock the MII interface.  Default:  Use MC01
+
 config STM32_MII_MCO2
 	bool "Use MC02 as MII clock"
-	default n
+	depends on (STM32_STM32F20XX || STM32_STM32F40XX)
-	depends on STM32_MII
 	---help---
 		Use MCO2 to clock the MII interface.  Default:  Use MC01
 
+endchoice
+
 config STM32_AUTONEG
 	bool "Use autonegtiation"
 	default y
@@ -1643,11 +1662,6 @@ config STM32_RMII
 	default y if !STM32_MII
 	depends on STM32_ETHMAC
 
-config STM32_MII_MCO1
-	bool
-	default y if !STM32_MII_MCO2
-	depends on STM32_MII
-
 menu "USB Host Configuration"
 
 config STM32_OTGFS_RXFIFO_SIZE

arch/arm/src/stm32/stm32_eth.c

@@ -2659,7 +2659,7 @@ static inline void stm32_ethgpioconfig(FAR struct stm32_ethmac_s *priv)
 
   /* Setup MCO pin for alternative usage */
 
-#if defined(CONFIG_STM32_RMII_MCO)
+#if defined(CONFIG_STM32_MII_MCO)
   stm32_configgpio(GPIO_MCO);
   stm32_mcoconfig(BOARD_CFGR_MCO_SOURCE);
 #endif