From edd8048107d1c96775b4ce372a24ff5daba05eae Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Wed, 10 Apr 2013 16:07:50 +0000
Subject: [PATCH] kernel: calibrate the TWD timer even when booting with only
one CPU, it is used for the watchdog timer base
Fixes booting on single-core CNS3xxx devices
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 36308
---
...995-mpcore_twd_calibrate_single_core.patch | 23 +++++++++++++++++++
...995-mpcore_twd_calibrate_single_core.patch | 23 +++++++++++++++++++
2 files changed, 46 insertions(+)
create mode 100644 target/linux/generic/patches-3.8/995-mpcore_twd_calibrate_single_core.patch
create mode 100644 target/linux/generic/patches-3.9/995-mpcore_twd_calibrate_single_core.patch
diff --git a/target/linux/generic/patches-3.8/995-mpcore_twd_calibrate_single_core.patch b/target/linux/generic/patches-3.8/995-mpcore_twd_calibrate_single_core.patch
new file mode 100644
index 0000000000..bd5cf52324
--- /dev/null
+++ b/target/linux/generic/patches-3.8/995-mpcore_twd_calibrate_single_core.patch
@@ -0,0 +1,23 @@
+--- a/arch/arm/kernel/smp_twd.c
++++ b/arch/arm/kernel/smp_twd.c
+@@ -189,7 +189,7 @@ core_initcall(twd_cpufreq_init);
+
+ #endif
+
+-static void __cpuinit twd_calibrate_rate(void)
++static int twd_calibrate_rate(void)
+ {
+ unsigned long count;
+ u64 waitjiffies;
+@@ -226,8 +226,11 @@ static void __cpuinit twd_calibrate_rate
+ printk("%lu.%02luMHz.\n", twd_timer_rate / 1000000,
+ (twd_timer_rate / 10000) % 100);
+ }
++ return 0;
+ }
+
++device_initcall(twd_calibrate_rate);
++
+ static irqreturn_t twd_handler(int irq, void *dev_id)
+ {
+ struct clock_event_device *evt = *(struct clock_event_device **)dev_id;
diff --git a/target/linux/generic/patches-3.9/995-mpcore_twd_calibrate_single_core.patch b/target/linux/generic/patches-3.9/995-mpcore_twd_calibrate_single_core.patch
new file mode 100644
index 0000000000..447aaca5bc
--- /dev/null
+++ b/target/linux/generic/patches-3.9/995-mpcore_twd_calibrate_single_core.patch
@@ -0,0 +1,23 @@
+--- a/arch/arm/kernel/smp_twd.c
++++ b/arch/arm/kernel/smp_twd.c
+@@ -186,7 +186,7 @@ core_initcall(twd_cpufreq_init);
+
+ #endif
+
+-static void __cpuinit twd_calibrate_rate(void)
++static int twd_calibrate_rate(void)
+ {
+ unsigned long count;
+ u64 waitjiffies;
+@@ -223,8 +223,11 @@ static void __cpuinit twd_calibrate_rate
+ printk("%lu.%02luMHz.\n", twd_timer_rate / 1000000,
+ (twd_timer_rate / 10000) % 100);
+ }
++ return 0;
+ }
+
++device_initcall(twd_calibrate_rate);
++
+ static irqreturn_t twd_handler(int irq, void *dev_id)
+ {
+ struct clock_event_device *evt = *(struct clock_event_device **)dev_id;
--
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