STM32 QSPI support#3691
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This adds way to configure MPU (v7) using link tables. User code will just have to declare MPU etrny in any place to add region to MPU. Signed-off-by: Jerzy Kasenberg <jerzy.kasenberg@codecoup.pl>
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This adds QSPI driver for STM32. With QSPI external flash access is more efficient that by simply using SPI. Flash can be mapped to memory and XPI functionalit cab be utinlized. 1,2,4 line can be used for data Writes to memory mapped device is also supported. Signed-off-by: Jerzy Kasenberg <jerzy.kasenberg@codecoup.pl>
Changes: - corrects flash map of stm32f7discovery (adds QSPI) - adds constant for peripheral pins Signed-off-by: Jerzy Kasenberg <jerzy.kasenberg@codecoup.pl>
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