Commit 2fc0cdf6 authored by Hans de Goede's avatar Hans de Goede Committed by Sasha Levin

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

[ Upstream commit fc51b632 ]

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: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
parent e19f0ec5
...@@ -178,6 +178,7 @@ reg_emac_3v3: emac-3v3 { ...@@ -178,6 +178,7 @@ reg_emac_3v3: emac-3v3 {
regulator-name = "emac-3v3"; regulator-name = "emac-3v3";
regulator-min-microvolt = <3300000>; regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>; regulator-max-microvolt = <3300000>;
startup-delay-us = <20000>;
enable-active-high; enable-active-high;
gpio = <&pio 7 15 GPIO_ACTIVE_HIGH>; gpio = <&pio 7 15 GPIO_ACTIVE_HIGH>;
}; };
......
...@@ -159,6 +159,7 @@ reg_emac_3v3: emac-3v3 { ...@@ -159,6 +159,7 @@ reg_emac_3v3: emac-3v3 {
regulator-name = "emac-3v3"; regulator-name = "emac-3v3";
regulator-min-microvolt = <3300000>; regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>; regulator-max-microvolt = <3300000>;
startup-delay-us = <20000>;
enable-active-high; enable-active-high;
gpio = <&pio 7 19 GPIO_ACTIVE_HIGH>; gpio = <&pio 7 19 GPIO_ACTIVE_HIGH>;
}; };
......
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