From 62cd11583cf14b378c3a1ac20b3cb7ae50fc1459 Mon Sep 17 00:00:00 2001 From: Colin Cross Date: Sat, 23 Oct 2010 23:25:52 -0700 Subject: [PATCH] ARM: tegra: suspend: Track the amount of time spent in suspend Change-Id: Iee5ec7da45d3405846d8655104d9736eccedb713 Signed-off-by: Colin Cross --- arch/arm/mach-tegra/suspend.c | 55 +++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/arch/arm/mach-tegra/suspend.c b/arch/arm/mach-tegra/suspend.c index 3efe40a1798d..06bafa1c45c6 100644 --- a/arch/arm/mach-tegra/suspend.c +++ b/arch/arm/mach-tegra/suspend.c @@ -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; } -- 2.34.1