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drivers: flash: max32: Disable interrupts before accessing flash

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Disable interrupts during flash operations to prevent unintended jumps.

Interrupts are now disabled before read, erase, and write operations to
avoid accidental jumps to other flash sections while working on a
specific section.

Signed-off-by: Tahsin Mutlugun <Tahsin.Mutlugun@analog.com>
This commit is contained in:
Tahsin Mutlugun 2024-12-20 14:35:03 +03:00 committed by Fabio Baltieri
parent 1876f60f9f
commit 41f2be9e5f
1 changed files with 16 additions and 0 deletions
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16
drivers/flash/flash_max32.c
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@ -52,9 +52,16 @@ static inline void max32_sem_give(const struct device *dev)
static int api_read(const struct device *dev, off_t address, void *buffer, size_t length)
{
const struct max32_flash_dev_config *const cfg = dev->config;
unsigned int key = 0;
address += cfg->flash_base;
key = irq_lock();
MXC_FLC_Read(address, buffer, length);
irq_unlock(key);
return 0;
}
@ -62,12 +69,18 @@ static int api_write(const struct device *dev, off_t address, const void *buffer
{
const struct max32_flash_dev_config *const cfg = dev->config;
int ret = 0;
unsigned int key = 0;
max32_sem_take(dev);
address += cfg->flash_base;
key = irq_lock();
ret = MXC_FLC_Write(address, length, (uint32_t *)buffer);
irq_unlock(key);
max32_sem_give(dev);
return ret != 0 ? -EIO : 0;
@ -79,9 +92,11 @@ static int api_erase(const struct device *dev, off_t start, size_t len)
uint32_t page_size = cfg->flash_erase_blk_sz;
uint32_t addr = (start + cfg->flash_base);
int ret = 0;
unsigned int key = 0;
max32_sem_take(dev);
key = irq_lock();
while (len) {
ret = MXC_FLC_PageErase(addr);
if (ret) {
@ -95,6 +110,7 @@ static int api_erase(const struct device *dev, off_t start, size_t len)
len = 0;
}
}
irq_unlock(key);
max32_sem_give(dev);