feat(stm32mp1): allow to override MTD base offset

Add an external parameter STM32MP_FORCE_MTD_START_OFFSET that allows to
override the default FIP offset used to read the first programmed image.
It can be used for NOR, RAW_NAND or SPI_NAND boot device.

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Change-Id: Ibe664aae0e5ee90dd6629e544c9e034d751fffed

plat/st/stm32mp1/platform.mk

@@ -357,6 +357,9 @@ BL2_SOURCES		+=	drivers/mtd/nand/spi_nand.c
 endif
 
 ifeq (${STM32MP_SPI_NOR},1)
+ifneq (${STM32MP_FORCE_MTD_START_OFFSET},)
+$(eval $(call add_define_val,STM32MP_NOR_FIP_OFFSET,${STM32MP_FORCE_MTD_START_OFFSET}))
+endif
 BL2_SOURCES		+=	drivers/mtd/nor/spi_nor.c
 endif
 
@@ -366,6 +369,9 @@ BL2_SOURCES		+=	drivers/mtd/spi-mem/spi_mem.c				\
 endif
 
 ifneq ($(filter 1,${STM32MP_RAW_NAND} ${STM32MP_SPI_NAND}),)
+ifneq (${STM32MP_FORCE_MTD_START_OFFSET},)
+$(eval $(call add_define_val,STM32MP_NAND_FIP_OFFSET,${STM32MP_FORCE_MTD_START_OFFSET}))
+endif
 BL2_SOURCES		+=	drivers/mtd/nand/core.c
 endif
 

plat/st/stm32mp1/stm32mp1_fip_def.h

@@ -106,7 +106,11 @@
  * STM32MP1 RAW partition offset for devices without GPT
  ******************************************************************************/
 #define STM32MP_EMMC_BOOT_FIP_OFFSET	U(0x00040000)
+#ifndef STM32MP_NOR_FIP_OFFSET
 #define STM32MP_NOR_FIP_OFFSET		U(0x00080000)
+#endif
+#ifndef STM32MP_NAND_FIP_OFFSET
 #define STM32MP_NAND_FIP_OFFSET		U(0x00200000)
+#endif
 
 #endif /* STM32MP1_FIP_DEF_H */