[net-next,PATCH v2 5/5] arm64: dts: st: increase deassert of PHY reset in stm32mp257f-ev1

Christophe Roullier christophe.roullier at foss.st.com
Wed Aug 12 02:11:22 PDT 2026


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 at foss.st.com>
Reviewed-by: Linus Walleij <linusw at kernel.org>
---
 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 14e033f365e39..a41ab55aa8cb5 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 at 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




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