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[ARM] tegra: cpufreq: Adjust twds on frequency scaling

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Change-Id: I8d187b861e18dfefcbf4566f4c695dfd1e17fe98
Signed-off-by: Colin Cross <ccross@google.com>
This commit is contained in:
Colin Cross
2010-08-19 22:19:53 -07:00
committed by Colin Cross
parent 65a06678fc
commit 0b4ec41425
1 changed files with 18 additions and 0 deletions
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18
arch/arm/mach-tegra/cpu-tegra.c
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@@ -30,6 +30,7 @@
#include <linux/io.h>
#include <linux/suspend.h>
#include <asm/smp_twd.h>
#include <asm/system.h>
#include <mach/hardware.h>
@@ -72,6 +73,17 @@ unsigned int tegra_getspeed(unsigned int cpu)
return rate;
}
static void tegra_cpufreq_rescale_twd_other_cpu(void *data) {
unsigned long new_rate = *(unsigned long *)data;
twd_recalc_prescaler(new_rate);
}
static void tegra_cpufreq_rescale_twds(unsigned long new_rate)
{
twd_recalc_prescaler(new_rate);
smp_call_function(tegra_cpufreq_rescale_twd_other_cpu, &new_rate, 1);
}
static int tegra_update_cpu_speed(unsigned long rate)
{
int ret = 0;
@@ -86,6 +98,9 @@ static int tegra_update_cpu_speed(unsigned long rate)
for_each_online_cpu(freqs.cpu)
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
if (freqs.new > freqs.old)
tegra_cpufreq_rescale_twds(freqs.new * 1000);
#ifdef CONFIG_CPU_FREQ_DEBUG
printk(KERN_DEBUG "cpufreq-tegra: transition: %u --> %u\n",
freqs.old, freqs.new);
@@ -98,6 +113,9 @@ static int tegra_update_cpu_speed(unsigned long rate)
return ret;
}
if (freqs.new < freqs.old)
tegra_cpufreq_rescale_twds(freqs.new * 1000);
for_each_online_cpu(freqs.cpu)
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);