ARM: dts: sunxi: Add a startup delay for fixed regulator enabled phys

[ Upstream commit fc51b632c7b047c25807023b76f3877aed19c770 ]

It seems that recent kernels have a shorter timeout when scanning for
ethernet phys causing us to hit a timeout on boards where the phy's
regulator gets enabled just before scanning, which leads to non working
ethernet.

A 10ms startup delay seems to be enough to fix it, this commit adds a
20ms startup delay just to be safe.

This has been tested on a sun4i-a10-a1000 and sun5i-a10s-wobo-i5 board,
both of which have non-working ethernet on recent kernels without this
fix.

Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>

diff --git a/arch/arm/boot/dts/sun4i-a10-a1000.dts b/arch/arm/boot/dts/sun4i-a10-a1000.dts
index 9e99ade35e37b3e2117bd1b3fd9ef304875cdfc2..0b43a186a36e874089f83d7f8aba98b5b26c6f1c 100644 (file)
--- a/arch/arm/boot/dts/sun4i-a10-a1000.dts
+++ b/arch/arm/boot/dts/sun4i-a10-a1000.dts
@@ -139,6 +139,7 @@
                regulator-name = "emac-3v3";
                regulator-min-microvolt = <3300000>;
                regulator-max-microvolt = <3300000>;
+               startup-delay-us = <20000>;
                enable-active-high;
                gpio = <&pio 7 15 0>;
        };

diff --git a/arch/arm/boot/dts/sun4i-a10-hackberry.dts b/arch/arm/boot/dts/sun4i-a10-hackberry.dts
index 891ea446abae9480f189b2d95fb31608ca5aa3f9..8ad4354b7febb7a8a02712f20657c5498f3c5e29 100644 (file)
--- a/arch/arm/boot/dts/sun4i-a10-hackberry.dts
+++ b/arch/arm/boot/dts/sun4i-a10-hackberry.dts
@@ -120,6 +120,7 @@
                regulator-name = "emac-3v3";
                regulator-min-microvolt = <3300000>;
                regulator-max-microvolt = <3300000>;
+               startup-delay-us = <20000>;
                enable-active-high;
                gpio = <&pio 7 19 0>;
        };