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authorVadzim Dambrouski <pftbest@gmail.com>2015-10-23 21:14:07 +0300
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2015-11-10 16:48:50 +0100
commit43fb0e3926dc52d4618d172a388cb6750311193d (patch)
treef1874da7ef425b0b703e79c748b0d76cf9799aab /arch/arm/cpu
parent4cd3246f2a3a3a5032edcaed3cf807dd916f0aea (diff)
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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 <pftbest@gmail.com>
Diffstat (limited to 'arch/arm/cpu')
-rw-r--r--arch/arm/cpu/armv7m/stm32f4/flash.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7m/stm32f4/flash.c b/arch/arm/cpu/armv7m/stm32f4/flash.c
index ae63790..dd058bd 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));