From: Vadzim Dambrouski Date: Fri, 23 Oct 2015 18:14:07 +0000 (+0300) Subject: arm: stm32f4: fix a bug when a random sector gets erased X-Git-Tag: v2016.01-rc1~79^2~6 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=43fb0e3926dc52d4618d172a388cb6750311193d;p=oweals%2Fu-boot.git arm: stm32f4: fix a bug when a random sector gets erased Old sector number is not being cleared from FLASH_CR register. For example when first erased sector was 001 and then you want to erase sector 010, sector 011 gets erased instead. This patch clears old sector number from FLASH_CR register before a new one is written. Signed-off-by: Vadzim Dambrouski --- diff --git a/arch/arm/cpu/armv7m/stm32f4/flash.c b/arch/arm/cpu/armv7m/stm32f4/flash.c index ae6379070f..dd058bd643 100644 --- a/arch/arm/cpu/armv7m/stm32f4/flash.c +++ b/arch/arm/cpu/armv7m/stm32f4/flash.c @@ -97,6 +97,9 @@ int flash_erase(flash_info_t *info, int first, int last) while (readl(&STM32_FLASH->sr) & STM32_FLASH_SR_BSY) ; + /* clear old sector number before writing a new one */ + clrbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_SNB_MASK); + if (bank == 0) { setbits_le32(&STM32_FLASH->cr, (i << STM32_FLASH_CR_SNB_OFFSET)); diff --git a/arch/arm/include/asm/arch-stm32f4/stm32.h b/arch/arm/include/asm/arch-stm32f4/stm32.h index 3ed3801dfe..7ca6dc3de8 100644 --- a/arch/arm/include/asm/arch-stm32f4/stm32.h +++ b/arch/arm/include/asm/arch-stm32f4/stm32.h @@ -104,6 +104,7 @@ struct stm32_flash_regs { #define STM32_FLASH_CR_STRT (1 << 16) #define STM32_FLASH_CR_LOCK (1 << 31) #define STM32_FLASH_CR_SNB_OFFSET 3 +#define STM32_FLASH_CR_SNB_MASK (15 << STM32_FLASH_CR_SNB_OFFSET) enum clock { CLOCK_CORE,