stm32mp1: split board and SOC support for STM32MP15x family

Split the board and SOC support for STM32MP15x family and
prepare the introduction of new boards with STM32MP15x.

This path define the 2 configurations:
- STM32MP15x: STM32MP15x soc support (new)
- TARGET_ST_STM32MP15x: STMicroelectronics board support (choice)

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>

arch/arm/dts/Makefile

@@ -862,7 +862,7 @@ dtb-$(CONFIG_ARCH_ASPEED) += ast2500-evb.dtb
 
 dtb-$(CONFIG_ARCH_STI) += stih410-b2260.dtb
 
-dtb-$(CONFIG_TARGET_STM32MP1) += \
+dtb-$(CONFIG_STM32MP15x) += \
 	stm32mp157a-dk1.dtb \
 	stm32mp157a-avenger96.dtb \
 	stm32mp157c-dk2.dtb \

arch/arm/mach-stm32mp/Kconfig

@@ -33,8 +33,8 @@ config SYS_MALLOC_LEN
 config ENV_SIZE
 	default 0x2000
 
-config TARGET_STM32MP1
-	bool "Support stm32mp1xx"
+config STM32MP15x
+	bool "Support STMicroelectronics STM32MP15x Soc"
 	select ARCH_SUPPORT_PSCI if !STM32MP1_TRUSTED
 	select CPU_V7A
 	select CPU_V7_HAS_NONSEC if !STM32MP1_TRUSTED
@@ -45,19 +45,35 @@ config TARGET_STM32MP1
 	select STM32_RESET
 	select STM32_SERIAL
 	select SYS_ARCH_TIMER
+	imply SYSRESET_PSCI if STM32MP1_TRUSTED
+	imply SYSRESET_SYSCON if !STM32MP1_TRUSTED
+	help
+		support of STMicroelectronics SOC STM32MP15x family
+		STM32MP157, STM32MP153 or STM32MP151
+		STMicroelectronics MPU with core ARMv7
+		dual core A7 for STM32MP157/3, monocore for STM32MP151
+		target all the STMicroelectronics board with SOC STM32MP1 family
+
+choice
+	prompt "STM32MP15x board select"
+	optional
+
+config TARGET_ST_STM32MP15x
+	bool "STMicroelectronics STM32MP15x boards"
+	select STM32MP15x
 	imply BOOTCOUNT_LIMIT
 	imply CMD_BOOTCOUNT
 	imply CMD_CLS if CMD_BMP
 	imply DISABLE_CONSOLE
 	imply PRE_CONSOLE_BUFFER
 	imply SILENT_CONSOLE
-	imply SYSRESET_PSCI if STM32MP1_TRUSTED
-	imply SYSRESET_SYSCON if !STM32MP1_TRUSTED
 	help
-		target STMicroelectronics SOC STM32MP1 family
-		STM32MP157, STM32MP153 or STM32MP151
-		STMicroelectronics MPU with core ARMv7
-		dual core A7 for STM32MP157/3, monocore for STM32MP151
+		target the STMicroelectronics board with SOC STM32MP15x
+		managed by board/st/stm32mp1:
+		Evalulation board (EV1) or Discovery board (DK1 and DK2).
+		The difference between board are managed with devicetree
+
+endchoice
 
 config STM32MP1_TRUSTED
 	bool "Support trusted boot with TF-A"

board/st/common/Kconfig

@@ -1,6 +1,7 @@
 config CMD_STBOARD
 	bool "stboard - command for OTP board information"
-	default y
+	depends on ARCH_STM32MP
+	default y if TARGET_ST_STM32MP15x
 	help
 	  This compile the stboard command to
 	  read and write the board in the OTP.

board/st/stm32mp1/Kconfig

@@ -1,4 +1,4 @@
-if TARGET_STM32MP1
+if TARGET_ST_STM32MP15x
 
 config SYS_BOARD
 	default "stm32mp1"
@@ -9,10 +9,5 @@ config SYS_VENDOR
 config SYS_CONFIG_NAME
 	default "stm32mp1"
 
-config TARGET_STM32MP157C_DK2
-	bool "support of STMicroelectronics STM32MP157C-DK2 Discovery Board"
-	default y
-
 source "board/st/common/Kconfig"
-
 endif

board/st/stm32mp1/stm32mp1.c

@@ -607,7 +607,7 @@ error:
 
 static bool board_is_dk2(void)
 {
-	if (CONFIG_IS_ENABLED(TARGET_STM32MP157C_DK2) &&
+	if (CONFIG_IS_ENABLED(TARGET_ST_STM32MP15x) &&
 	    of_machine_is_compatible("st,stm32mp157c-dk2"))
 		return true;
 

configs/stm32mp15_basic_defconfig

@@ -5,7 +5,7 @@ CONFIG_ENV_SECT_SIZE=0x40000
 CONFIG_ENV_OFFSET=0x280000
 CONFIG_SPL_MMC_SUPPORT=y
 CONFIG_SPL=y
-CONFIG_TARGET_STM32MP1=y
+CONFIG_TARGET_ST_STM32MP15x=y
 CONFIG_SPL_SPI_FLASH_SUPPORT=y
 CONFIG_SPL_SPI_SUPPORT=y
 # CONFIG_ARMV7_VIRT is not set

configs/stm32mp15_optee_defconfig

@@ -3,7 +3,7 @@ CONFIG_ARCH_STM32MP=y
 CONFIG_SYS_MALLOC_F_LEN=0x3000
 CONFIG_ENV_SECT_SIZE=0x40000
 CONFIG_ENV_OFFSET=0x280000
-CONFIG_TARGET_STM32MP1=y
+CONFIG_TARGET_ST_STM32MP15x=y
 CONFIG_STM32MP1_OPTEE=y
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_FIT=y

configs/stm32mp15_trusted_defconfig

@@ -3,7 +3,7 @@ CONFIG_ARCH_STM32MP=y
 CONFIG_SYS_MALLOC_F_LEN=0x3000
 CONFIG_ENV_SECT_SIZE=0x40000
 CONFIG_ENV_OFFSET=0x280000
-CONFIG_TARGET_STM32MP1=y
+CONFIG_TARGET_ST_STM32MP15x=y
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_FIT=y
 CONFIG_BOOTCOMMAND="run bootcmd_stm32mp"