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Patch "ARM: dts: sunxi: Add a startup delay for fixed regulator enabled phys" has been added to the 4.7-stable tree

PATCH [email protected] 1 participant 1 message Aug 18, 2016

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Stable branch Device tree bindings Arm/Allwinner sunXi SoC support
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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 4.7-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-4.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From fc51b632c7b047c25807023b76f3877aed19c770 Mon Sep 17 00:00:00 2001

From: Hans de Goede <[email protected]>
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 <[email protected]>

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 <[email protected]>
Signed-off-by Maxime Ripard <[email protected]>
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 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(+)
arch/arm/boot/dts/sun4i-a10-a1000.dts +1 -0
@@ -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>;
 	};
arch/arm/boot/dts/sun4i-a10-hackberry.dts +1 -0
@@ -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>;
 	};
arch/arm/boot/dts/sun4i-a10-jesurun-q5.dts +1 -0
@@ -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 */
 	};
arch/arm/boot/dts/sun5i-a10s-wobo-i5.dts +1 -0
@@ -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 [email protected] are

queue-4.7/arm-dts-sunxi-add-a-startup-delay-for-fixed-regulator-enabled-phys.patch