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stm32: stm32f7: add spl build support

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This commit supports booting from stm32 internal nor flash. spl U-Boot
initializes the sdram memory, copies next image (e.g. standard U-Boot)
to sdram & then jumps to entry point.

Here are the flash memory addresses for U-Boot-spl & standard U-Boot:
	- spl U-Boot		: 0x0800_0000
	- standard U-Boot	: 0x0800_8000

To compile u-boot without spl: Remove SUPPORT_SPL configuration
(arch/arm/mach-stm32/Kconfig)

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
[trini: Rework Kconfig logic a bit]
Signed-off-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Vikas Manocha
2017-05-28 12:55:10 -07:00
committed by Tom Rini
parent ea744fca0e
commit b97476965b
5 changed files with 65 additions and 3 deletions
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1
configs/stm32f746-disco_defconfig
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@@ -39,7 +39,6 @@ CONFIG_ETH_DESIGNWARE=y
CONFIG_PINCTRL=y
# CONFIG_PINCTRL_FULL is not set
CONFIG_PINCTRL_STM32=y
# CONFIG_SPL_SERIAL_PRESENT is not set
CONFIG_DM_SPI=y
CONFIG_STM32_QSPI=y
CONFIG_OF_LIBFDT_OVERLAY=y