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driver/mtd_spi_nor: clearup sleep timming

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This commit is contained in:
Karl Fessel 2022-03-29 13:32:35 +02:00
parent cdffc8f0ca
commit f8607ecc28
1 changed files with 15 additions and 14 deletions
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29
drivers/mtd_spi_nor/mtd_spi_nor.c
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@ -342,7 +342,7 @@ static uint32_t mtd_spi_nor_get_size(const mtd_jedec_id_t *id)
static inline void wait_for_write_complete(const mtd_spi_nor_t *dev, uint32_t us)
{
unsigned i = 0, j = 0;
uint32_t div = 2;
uint32_t div = 1; /* first wait one full interval */
#if IS_ACTIVE(ENABLE_DEBUG)
uint32_t diff = 0;
#endif
@ -362,13 +362,15 @@ static inline void wait_for_write_complete(const mtd_spi_nor_t *dev, uint32_t us
i++;
#if IS_USED(MODULE_ZTIMER_USEC)
if (us) {
ztimer_sleep(ZTIMER_USEC, us);
uint32_t wait_us = us / div;
uint32_t wait_min = 2;
wait_us = wait_us > wait_min ? wait_us : wait_min;
ztimer_sleep(ZTIMER_USEC, wait_us);
/* reduce the waiting time quickly if the estimate was too short,
* but still avoid busy (yield) waiting */
if (us > 2) {
us -= (us / div);
div++;
}
div++;
}
else {
j++;
@ -376,16 +378,15 @@ static inline void wait_for_write_complete(const mtd_spi_nor_t *dev, uint32_t us
}
#elif IS_USED(MODULE_XTIMER)
if (us) {
xtimer_usleep(us);
uint32_t wait_us = us / div;
uint32_t wait_min = 2 * XTIMER_BACKOFF;
wait_us = wait_us > wait_min ? wait_us : wait_min;
xtimer_usleep(wait_us);
/* reduce the waiting time quickly if the estimate was too short,
* but still avoid busy (yield) waiting */
if (us > 2 * XTIMER_BACKOFF) {
us -= (us / div);
div++;
}
else {
us = 2 * XTIMER_BACKOFF;
}
div++;
}
else {
j++;