[U-Boot] [U-Boot,v2,3/7] stm32: stm32f7: add spl build support

[Tom Rini]

On Sun, May 28, 2017 at 12:55:10PM -0700, Vikas Manocha wrote:

> 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 at st.com>

I had to rework the Kconfig locations here slightly (and in follow-up
patches) to have the main select's be under STM32F7 in
arch/arm/mach-stm32/Kconfig as it's not right to introduce a second
'config SUPPORT_SPL\nselect ...' stanza inside of
arch/arm/mach-stm32/stm32f7/Kconfig.

Reviewed-by: Tom Rini <trini at konsulko.com>

-- 
Tom
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