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arch/arm/src/stm32h7: Make flash program size configurable

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Signed-off-by: Jukka Laitinen <jukka.laitinen@intel.com>
This commit is contained in:
Jukka Laitinen 2020-05-14 13:08:04 +03:00 committed by patacongo
parent de8f3b73d5
commit 1e0f416a93
2 changed files with 21 additions and 1 deletions
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14
arch/arm/src/stm32h7/Kconfig
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@ -297,6 +297,20 @@ config STM32H7_FLASH_OVERRIDE_I
endchoice # "Override Flash Size Designator"
config STM32H7_FLASH_CR_PSIZE
int "Flash program size width"
depends on ARCH_CHIP_STM32H7
default 3
range 0 3
---help---
On some hardware the fastest 64 bit wide flash writes cause too
high power consumption which may compromize the system stability.
This option can be used to reduce the program size. The options are:
0: 8 bits
1: 16 bits
2: 32 bits
3: 64 bits (default)
config STM32H7_AXI_SRAM_CORRUPTION_WAR
bool "Errata 2.2.9 Reading from AXI SRAM data read corruption Workaround"
default y

8
arch/arm/src/stm32h7/stm32_flash.c
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@ -140,6 +140,12 @@
#endif
#ifndef CONFIG_STM32H7_FLASH_CR_PSIZE
#define FLASH_CR_PSIZE FLASH_CR_PSIZE_X64
#else
#define FLASH_CR_PSIZE (CONFIG_STM32H7_FLASH_CR_PSIZE << FLASH_CR_PSIZE_SHIFT)
#endif
#define FLASH_KEY1 0x45670123
#define FLASH_KEY2 0xcdef89ab
#define FLASH_OPTKEY1 0x08192a3b
@ -871,7 +877,7 @@ ssize_t up_progmem_write(size_t addr, const void *buf, size_t count)
stm32h7_unlock_flash(priv);
stm32h7_flash_modifyreg32(priv, STM32_FLASH_CR1_OFFSET,
FLASH_CR_PSIZE_MASK, FLASH_CR_PSIZE_X32);
FLASH_CR_PSIZE_MASK, FLASH_CR_PSIZE);
stm32h7_flash_modifyreg32(priv, STM32_FLASH_CR1_OFFSET, 0, FLASH_CR_PG);