This is a note to let you know that I've just added the patch titled
ARM: kirkwood: of_serial: fix clock gating by removing clock-frequency
to the 3.8-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-kirkwood-of_serial-fix-clock-gating-by-removing-clock-frequency.patch
and it can be found in the queue-3.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 93fff4ce19f9978cc1c59db42760717477939249 Mon Sep 17 00:00:00 2001
From: Jason Cooper <jason@xxxxxxxxxxxxxx>
Date: Tue, 29 Jan 2013 20:36:43 +0000
Subject: ARM: kirkwood: of_serial: fix clock gating by removing clock-frequency
From: Jason Cooper <jason@xxxxxxxxxxxxxx>
commit 93fff4ce19f9978cc1c59db42760717477939249 upstream.
When DT support for kirkwood was first introduced, there was no clock
infrastructure. As a result, we had to manually pass the
clock-frequency to the driver from the device node.
Unfortunately, on kirkwood, with minimal config or all module configs,
clock-frequency breaks booting because of_serial doesn't consume the
gate_clk when clock-frequency is defined.
The end result on kirkwood is that runit gets gated, and then the boot
fails when the kernel tries to write to the serial port.
Fix the issue by removing the clock-frequency parameter from all
kirkwood dts files.
Booted on dreamplug without earlyprintk and successfully logged in via
ttyS0.
Reported-by: Simon Baatz <gmbnomis@xxxxxxxxx>
Tested-by: Simon Baatz <gmbnomis@xxxxxxxxx>
Signed-off-by: Jason Cooper <jason@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/boot/dts/kirkwood-dns320.dts | 2 --
arch/arm/boot/dts/kirkwood-dns325.dts | 1 -
arch/arm/boot/dts/kirkwood-dockstar.dts | 1 -
arch/arm/boot/dts/kirkwood-dreamplug.dts | 1 -
arch/arm/boot/dts/kirkwood-goflexnet.dts | 1 -
arch/arm/boot/dts/kirkwood-ib62x0.dts | 1 -
arch/arm/boot/dts/kirkwood-iconnect.dts | 1 -
arch/arm/boot/dts/kirkwood-iomega_ix2_200.dts | 1 -
arch/arm/boot/dts/kirkwood-km_kirkwood.dts | 1 -
arch/arm/boot/dts/kirkwood-lschlv2.dts | 1 -
arch/arm/boot/dts/kirkwood-lsxhl.dts | 1 -
arch/arm/boot/dts/kirkwood-mplcec4.dts | 1 -
arch/arm/boot/dts/kirkwood-ns2-common.dtsi | 1 -
arch/arm/boot/dts/kirkwood-nsa310.dts | 1 -
arch/arm/boot/dts/kirkwood-openblocks_a6.dts | 2 --
arch/arm/boot/dts/kirkwood-topkick.dts | 1 -
arch/arm/boot/dts/kirkwood.dtsi | 2 --
17 files changed, 20 deletions(-)
--- a/arch/arm/boot/dts/kirkwood-dns320.dts
+++ b/arch/arm/boot/dts/kirkwood-dns320.dts
@@ -42,12 +42,10 @@
ocp@f1000000 {
serial@12000 {
- clock-frequency = <166666667>;
status = "okay";
};
serial@12100 {
- clock-frequency = <166666667>;
status = "okay";
};
};
--- a/arch/arm/boot/dts/kirkwood-dns325.dts
+++ b/arch/arm/boot/dts/kirkwood-dns325.dts
@@ -50,7 +50,6 @@
};
};
serial@12000 {
- clock-frequency = <200000000>;
status = "okay";
};
};
--- a/arch/arm/boot/dts/kirkwood-dockstar.dts
+++ b/arch/arm/boot/dts/kirkwood-dockstar.dts
@@ -37,7 +37,6 @@
};
};
serial@12000 {
- clock-frequency = <200000000>;
status = "ok";
};
--- a/arch/arm/boot/dts/kirkwood-dreamplug.dts
+++ b/arch/arm/boot/dts/kirkwood-dreamplug.dts
@@ -38,7 +38,6 @@
};
};
serial@12000 {
- clock-frequency = <200000000>;
status = "ok";
};
--- a/arch/arm/boot/dts/kirkwood-goflexnet.dts
+++ b/arch/arm/boot/dts/kirkwood-goflexnet.dts
@@ -73,7 +73,6 @@
};
};
serial@12000 {
- clock-frequency = <200000000>;
status = "ok";
};
--- a/arch/arm/boot/dts/kirkwood-ib62x0.dts
+++ b/arch/arm/boot/dts/kirkwood-ib62x0.dts
@@ -51,7 +51,6 @@
};
};
serial@12000 {
- clock-frequency = <200000000>;
status = "okay";
};
--- a/arch/arm/boot/dts/kirkwood-iconnect.dts
+++ b/arch/arm/boot/dts/kirkwood-iconnect.dts
@@ -78,7 +78,6 @@
};
};
serial@12000 {
- clock-frequency = <200000000>;
status = "ok";
};
--- a/arch/arm/boot/dts/kirkwood-iomega_ix2_200.dts
+++ b/arch/arm/boot/dts/kirkwood-iomega_ix2_200.dts
@@ -115,7 +115,6 @@
};
serial@12000 {
- clock-frequency = <200000000>;
status = "ok";
};
--- a/arch/arm/boot/dts/kirkwood-km_kirkwood.dts
+++ b/arch/arm/boot/dts/kirkwood-km_kirkwood.dts
@@ -34,7 +34,6 @@
};
serial@12000 {
- clock-frequency = <200000000>;
status = "ok";
};
--- a/arch/arm/boot/dts/kirkwood-lschlv2.dts
+++ b/arch/arm/boot/dts/kirkwood-lschlv2.dts
@@ -13,7 +13,6 @@
ocp@f1000000 {
serial@12000 {
- clock-frequency = <166666667>;
status = "okay";
};
};
--- a/arch/arm/boot/dts/kirkwood-lsxhl.dts
+++ b/arch/arm/boot/dts/kirkwood-lsxhl.dts
@@ -13,7 +13,6 @@
ocp@f1000000 {
serial@12000 {
- clock-frequency = <200000000>;
status = "okay";
};
};
--- a/arch/arm/boot/dts/kirkwood-mplcec4.dts
+++ b/arch/arm/boot/dts/kirkwood-mplcec4.dts
@@ -91,7 +91,6 @@
};
serial@12000 {
- clock-frequency = <200000000>;
status = "ok";
};
--- a/arch/arm/boot/dts/kirkwood-ns2-common.dtsi
+++ b/arch/arm/boot/dts/kirkwood-ns2-common.dtsi
@@ -23,7 +23,6 @@
};
serial@12000 {
- clock-frequency = <166666667>;
status = "okay";
};
--- a/arch/arm/boot/dts/kirkwood-nsa310.dts
+++ b/arch/arm/boot/dts/kirkwood-nsa310.dts
@@ -18,7 +18,6 @@
ocp@f1000000 {
serial@12000 {
- clock-frequency = <200000000>;
status = "ok";
};
--- a/arch/arm/boot/dts/kirkwood-openblocks_a6.dts
+++ b/arch/arm/boot/dts/kirkwood-openblocks_a6.dts
@@ -18,12 +18,10 @@
ocp@f1000000 {
serial@12000 {
- clock-frequency = <200000000>;
status = "ok";
};
serial@12100 {
- clock-frequency = <200000000>;
status = "ok";
};
--- a/arch/arm/boot/dts/kirkwood-topkick.dts
+++ b/arch/arm/boot/dts/kirkwood-topkick.dts
@@ -17,7 +17,6 @@
ocp@f1000000 {
serial@12000 {
- clock-frequency = <200000000>;
status = "ok";
};
--- a/arch/arm/boot/dts/kirkwood.dtsi
+++ b/arch/arm/boot/dts/kirkwood.dtsi
@@ -59,7 +59,6 @@
reg-shift = <2>;
interrupts = <33>;
clocks = <&gate_clk 7>;
- /* set clock-frequency in board dts */
status = "disabled";
};
@@ -69,7 +68,6 @@
reg-shift = <2>;
interrupts = <34>;
clocks = <&gate_clk 7>;
- /* set clock-frequency in board dts */
status = "disabled";
};
Patches currently in stable-queue which might be from jason@xxxxxxxxxxxxxx are
queue-3.8/rtc-rtc-mv-add-support-for-clk-to-avoid-lockups.patch
queue-3.8/arm-kirkwood-of_serial-fix-clock-gating-by-removing-clock-frequency.patch
queue-3.8/gpio-mvebu-add-clk-support-to-prevent-lockup.patch
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