power: imx8m-power-domain: Add delay to align with kernel driver

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 yet,
but better to align it with the kernel driver implementation.

Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Marek Vasut <marex@denx.de>

diff --git a/drivers/power/domain/imx8m-power-domain.c b/drivers/power/domain/imx8m-power-domain.c
index 145f6ec..df5d7d6 100644 (file)
--- 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);