This is a note to let you know that I've just added the patch titled
ARM: dts: sunxi: Add a startup delay for fixed regulator enabled phys
to the 4.4-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-sunxi-add-a-startup-delay-for-fixed-regulator-enabled-phys.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fc51b632c7b047c25807023b76f3877aed19c770 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@xxxxxxxxxx>
Date: Sat, 4 Jun 2016 12:58:39 +0200
Subject: ARM: dts: sunxi: Add a startup delay for fixed regulator enabled phys
From: Hans de Goede <hdegoede@xxxxxxxxxx>
commit fc51b632c7b047c25807023b76f3877aed19c770 upstream.
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.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/boot/dts/sun4i-a10-a1000.dts | 1 +
arch/arm/boot/dts/sun4i-a10-hackberry.dts | 1 +
arch/arm/boot/dts/sun4i-a10-jesurun-q5.dts | 1 +
arch/arm/boot/dts/sun5i-a10s-wobo-i5.dts | 1 +
4 files changed, 4 insertions(+)
--- a/arch/arm/boot/dts/sun4i-a10-a1000.dts
+++ b/arch/arm/boot/dts/sun4i-a10-a1000.dts
@@ -84,6 +84,7 @@
regulator-name = "emac-3v3";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
+ startup-delay-us = <20000>;
enable-active-high;
gpio = <&pio 7 15 GPIO_ACTIVE_HIGH>;
};
--- a/arch/arm/boot/dts/sun4i-a10-hackberry.dts
+++ b/arch/arm/boot/dts/sun4i-a10-hackberry.dts
@@ -66,6 +66,7 @@
regulator-name = "emac-3v3";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
+ startup-delay-us = <20000>;
enable-active-high;
gpio = <&pio 7 19 GPIO_ACTIVE_HIGH>;
};
--- a/arch/arm/boot/dts/sun4i-a10-jesurun-q5.dts
+++ b/arch/arm/boot/dts/sun4i-a10-jesurun-q5.dts
@@ -80,6 +80,7 @@
regulator-name = "emac-3v3";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
+ startup-delay-us = <20000>;
enable-active-high;
gpio = <&pio 7 19 GPIO_ACTIVE_HIGH>; /* PH19 */
};
--- a/arch/arm/boot/dts/sun5i-a10s-wobo-i5.dts
+++ b/arch/arm/boot/dts/sun5i-a10s-wobo-i5.dts
@@ -79,6 +79,7 @@
regulator-name = "emac-3v3";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
+ startup-delay-us = <20000>;
enable-active-high;
gpio = <&pio 0 2 GPIO_ACTIVE_HIGH>;
};
Patches currently in stable-queue which might be from hdegoede@xxxxxxxxxx are
queue-4.4/arm-dts-sunxi-add-a-startup-delay-for-fixed-regulator-enabled-phys.patch
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