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ARM: tegra: suspend: Track the amount of time spent in suspend

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Change-Id: Iee5ec7da45d3405846d8655104d9736eccedb713
Signed-off-by: Colin Cross <ccross@android.com>
This commit is contained in:
Colin Cross
2010-10-23 23:25:52 -07:00
parent 0ecadc39ae
commit 62cd11583c
1 changed files with 55 additions and 0 deletions
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55
arch/arm/mach-tegra/suspend.c
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@@ -120,6 +120,13 @@ static const struct tegra_suspend_platform_data *pdata = NULL;
static unsigned long wb0_restore = 0;
static enum tegra_suspend_mode current_suspend_mode;
static unsigned int tegra_time_in_suspend[32];
static inline unsigned int time_to_bin(unsigned int time)
{
return fls(time);
}
unsigned long tegra_cpu_power_good_time(void)
{
if (WARN_ON_ONCE(!pdata))
@@ -541,6 +548,10 @@ static int tegra_suspend_enter(suspend_state_t state)
bool do_lp0 = (current_suspend_mode == TEGRA_SUSPEND_LP0);
bool do_lp2 = (current_suspend_mode == TEGRA_SUSPEND_LP2);
int lp_state;
u64 rtc_before;
u64 rtc_after;
u64 secs;
u32 ms;
if (do_lp2)
lp_state = 2;
@@ -573,11 +584,15 @@ static int tegra_suspend_enter(suspend_state_t state)
}
}
rtc_before = tegra_rtc_read_ms();
if (do_lp2)
tegra_suspend_lp2(0);
else
tegra_suspend_dram(do_lp0);
rtc_after = tegra_rtc_read_ms();
for_each_irq_desc(irq, desc) {
if ((desc->status & IRQ_WAKEUP) &&
(desc->status & IRQ_SUSPENDED)) {
@@ -602,6 +617,12 @@ static int tegra_suspend_enter(suspend_state_t state)
tegra_irq_resume();
}
secs = rtc_after - rtc_before;
ms = do_div(secs, 1000);
pr_info("Suspended for %llu.%03u seconds\n", secs, ms);
tegra_time_in_suspend[time_to_bin(secs)]++;
local_irq_restore(flags);
return 0;
@@ -748,6 +769,33 @@ static const struct file_operations tegra_suspend_debug_fops = {
.release = single_release,
};
static int tegra_suspend_time_debug_show(struct seq_file *s, void *data)
{
int bin;
seq_printf(s, "time (secs) count\n");
seq_printf(s, "------------------\n");
for (bin = 0; bin < 32; bin++) {
if (tegra_time_in_suspend[bin] == 0)
continue;
seq_printf(s, "%4d - %4d %4u\n",
bin ? 1 << (bin - 1) : 0, 1 << bin,
tegra_time_in_suspend[bin]);
}
return 0;
}
static int tegra_suspend_time_debug_open(struct inode *inode, struct file *file)
{
return single_open(file, tegra_suspend_time_debug_show, NULL);
}
static const struct file_operations tegra_suspend_time_debug_fops = {
.open = tegra_suspend_time_debug_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int __init tegra_suspend_debug_init(void)
{
struct dentry *d;
@@ -759,6 +807,13 @@ static int __init tegra_suspend_debug_init(void)
return -ENOMEM;
}
d = debugfs_create_file("suspend_time", 0755, NULL, NULL,
&tegra_suspend_time_debug_fops);
if (!d) {
pr_info("Failed to create suspend_time debug file\n");
return -ENOMEM;
}
return 0;
}