[PATCH 3/4] arm64: dts: st: increase deassert of PHY reset in stm32mp257f-ev1
From: Christophe Roullier
Date: Tue Aug 04 2026 - 09:23:41 EST
The RTL8211F has a PHYRSTB pin to reset the chip.
For a complete PHY reset, this pin must be asserted low for
at least 10ms for the internal regulator.
Wait for at least 80ms (for internal circuits setting time) before
accessing the PHY register.
All registers will return to default values after a hardware reset
Signed-off-by: Christophe Roullier <christophe.roullier@xxxxxxxxxxx>
---
arch/arm64/boot/dts/st/stm32mp257f-ev1.dts | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
index 14e033f365e3..a41ab55aa8cb 100644
--- a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
+++ b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
@@ -247,7 +247,7 @@ phy0_eth2: ethernet-phy@1 {
compatible = "ethernet-phy-id001c.c916";
reg = <1>;
reset-assert-us = <10000>;
- reset-deassert-us = <300>;
+ reset-deassert-us = <80000>;
reset-gpios = <&gpiog 6 GPIO_ACTIVE_LOW>;
};
};
--
2.43.0