This is a note to let you know that I've just added the patch titled
ARM: dts: stm32: Fix PHY post-reset delay on Avenger96
to the 5.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-dts-stm32-fix-phy-post-reset-delay-on-avenger96.patch
and it can be found in the queue-5.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 1191f3269804b13ceef641db0f1c66e6fc9d77d6
Author: Marek Vasut <marex@xxxxxxx>
Date: Fri Mar 25 18:58:51 2022 +0100
ARM: dts: stm32: Fix PHY post-reset delay on Avenger96
[ 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>
diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcor-avenger96.dtsi b/arch/arm/boot/dts/stm32mp15xx-dhcor-avenger96.dtsi
index 61e17f44ce81..76c54b006d87 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dhcor-avenger96.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dhcor-avenger96.dtsi
@@ -141,6 +141,7 @@ mdio0 {
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>;
