From: Fabio Estevam <feste...@denx.de> In the imx8m power domain kernel driver, there is an extra udelay(5) prior to requesting the domain to power up:
https://github.com/torvalds/linux/blob/v6.3/drivers/soc/imx/gpcv2.c#L347-L375 Haven't observed any issues due to the lack of this delay in U-Boot, but better to align it with the driver implementation. Signed-off-by: Fabio Estevam <feste...@denx.de> --- Marking it as RFC for now, to try to get some feedback first. Thanks drivers/power/domain/imx8m-power-domain.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/power/domain/imx8m-power-domain.c b/drivers/power/domain/imx8m-power-domain.c index 145f6ec0cd32..df5d7d695621 100644 --- a/drivers/power/domain/imx8m-power-domain.c +++ b/drivers/power/domain/imx8m-power-domain.c @@ -338,6 +338,9 @@ static int imx8m_power_domain_on(struct power_domain *power_domain) } } + /* delay for reset to propagate */ + udelay(5); + if (domain->bits.pxx) { /* request the domain to power up */ setbits_le32(base + regs->pup, domain->bits.pxx); -- 2.34.1
