[PATCH 5.10 274/452] ARM: dts: stm32: Fix PHY post-reset delay on Avenger96

[Greg Kroah-Hartman]

From: Marek Vasut <marex@xxxxxxx>

[ Upstream commit ef2d90708883f4025a801feb0ba8411a7a4387e1 ]

Per KSZ9031RNX PHY datasheet FIGURE 7-5: POWER-UP/POWER-DOWN/RESET TIMING
Note 2: After the de-assertion of reset, wait a minimum of 100 μs before
starting programming on the MIIM (MDC/MDIO) interface.

Add 1ms post-reset delay to guarantee this figure.

Fixes: 010ca9fe500bf ("ARM: dts: stm32: Add missing ethernet PHY reset on AV96")
Signed-off-by: Marek Vasut <marex@xxxxxxx>
Cc: Alexandre Torgue <alexandre.torgue@xxxxxxxxxxx>
Cc: Patrice Chotard <patrice.chotard@xxxxxxxxxxx>
Cc: Patrick Delaunay <patrick.delaunay@xxxxxxxxxxx>
Cc: linux-stm32@xxxxxxxxxxxxxxxxxxxxxxxxxxxx
To: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Alexandre Torgue <alexandre.torgue@xxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 arch/arm/boot/dts/stm32mp15xx-dhcor-avenger96.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcor-avenger96.dtsi b/arch/arm/boot/dts/stm32mp15xx-dhcor-avenger96.dtsi
index 944d38b85eef..f3e0c790a4b1 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dhcor-avenger96.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dhcor-avenger96.dtsi
@@ -141,6 +141,7 @@
 		compatible = "snps,dwmac-mdio";
 		reset-gpios = <&gpioz 2 GPIO_ACTIVE_LOW>;
 		reset-delay-us = <1000>;
+		reset-post-delay-us = <1000>;
 
 		phy0: ethernet-phy@7 {
 			reg = <7>;
-- 
2.35.1