On 11/02/25 23:46, Erick Shepherd wrote: > The SD spec version 6.0 section 6.4.1.5 requires that Vdd must be > lowered to less than 0.5V for a minimum of 1 ms when powering off a > card. Increase our wait to 15 ms so that voltage has time to drain down > to 0.5V. mmc_power_off() has a delay. So does mmc_power_cycle() Why does this need to be in sdhci? Are you experiencing an issue? > > Signed-off-by: Kyle Roeschley <kyle.roeschley@xxxxxx> > Signed-off-by: Brad Mouring <brad.mouring@xxxxxx> > Signed-off-by: Erick Shepherd <erick.shepherd@xxxxxx> > --- > drivers/mmc/host/sdhci.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c > index f4a7733a8ad2..b15a1f107549 100644 > --- a/drivers/mmc/host/sdhci.c > +++ b/drivers/mmc/host/sdhci.c > @@ -2415,6 +2415,9 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) > else > sdhci_set_power(host, ios->power_mode, ios->vdd); > > + if (ios->power_mode == MMC_POWER_OFF) > + mdelay(15); > + > if (host->ops->platform_send_init_74_clocks) > host->ops->platform_send_init_74_clocks(host, ios->power_mode); >
