3 files changed, 186 insertions, 1 deletions

diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c
index da3a53f8ccc8..7383e85eac26 100644
--- a/arch/arm/mach-omap2/pm-debug.c
+++ b/arch/arm/mach-omap2/pm-debug.c
@@ -20,13 +20,15 @@
  */
 
 #include <linux/kernel.h>
-#include <linux/timer.h>
+#include <linux/sched.h>
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/io.h>
 
 #include <mach/clock.h>
 #include <mach/board.h>
+#include <mach/powerdomain.h>
+#include <mach/clockdomain.h>
 
 #include "prm.h"
 #include "cm.h"
@@ -150,3 +152,177 @@ void omap2_pm_dump(int mode, int resume, unsigned int us)
         for (i = 0; i < reg_count; i++)
                 printk(KERN_INFO "%-20s: 0x%08x\n", regs[i].name, regs[i].val);
 }
+
+#ifdef CONFIG_DEBUG_FS
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+struct dentry *pm_dbg_dir;
+
+static int pm_dbg_init_done;
+
+enum {
+        DEBUG_FILE_COUNTERS = 0,
+        DEBUG_FILE_TIMERS,
+};
+
+static const char pwrdm_state_names[][4] = {
+        "OFF",
+        "RET",
+        "INA",
+        "ON"
+};
+
+void pm_dbg_update_time(struct powerdomain *pwrdm, int prev)
+{
+        s64 t;
+
+        if (!pm_dbg_init_done)
+                return ;
+
+        /* Update timer for previous state */
+        t = sched_clock();
+
+        pwrdm->state_timer[prev] += t - pwrdm->timer;
+
+        pwrdm->timer = t;
+}
+
+static int clkdm_dbg_show_counter(struct clockdomain *clkdm, void *user)
+{
+        struct seq_file *s = (struct seq_file *)user;
+
+        if (strcmp(clkdm->name, "emu_clkdm") == 0 ||
+                strcmp(clkdm->name, "wkup_clkdm") == 0 ||
+                strncmp(clkdm->name, "dpll", 4) == 0)
+                return 0;
+
+        seq_printf(s, "%s->%s (%d)", clkdm->name,
+                        clkdm->pwrdm.ptr->name,
+                        atomic_read(&clkdm->usecount));
+        seq_printf(s, "\n");
+
+        return 0;
+}
+
+static int pwrdm_dbg_show_counter(struct powerdomain *pwrdm, void *user)
+{
+        struct seq_file *s = (struct seq_file *)user;
+        int i;
+
+        if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
+                strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
+                strncmp(pwrdm->name, "dpll", 4) == 0)
+                return 0;
+
+        if (pwrdm->state != pwrdm_read_pwrst(pwrdm))
+                printk(KERN_ERR "pwrdm state mismatch(%s) %d != %d\n",
+                        pwrdm->name, pwrdm->state, pwrdm_read_pwrst(pwrdm));
+
+        seq_printf(s, "%s (%s)", pwrdm->name,
+                        pwrdm_state_names[pwrdm->state]);
+        for (i = 0; i < 4; i++)
+                seq_printf(s, ",%s:%d", pwrdm_state_names[i],
+                        pwrdm->state_counter[i]);
+
+        seq_printf(s, "\n");
+
+        return 0;
+}
+
+static int pwrdm_dbg_show_timer(struct powerdomain *pwrdm, void *user)
+{
+        struct seq_file *s = (struct seq_file *)user;
+        int i;
+
+        if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
+                strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
+                strncmp(pwrdm->name, "dpll", 4) == 0)
+                return 0;
+
+        pwrdm_state_switch(pwrdm);
+
+        seq_printf(s, "%s (%s)", pwrdm->name,
+                pwrdm_state_names[pwrdm->state]);
+
+        for (i = 0; i < 4; i++)
+                seq_printf(s, ",%s:%lld", pwrdm_state_names[i],
+                        pwrdm->state_timer[i]);
+
+        seq_printf(s, "\n");
+        return 0;
+}
+
+static int pm_dbg_show_counters(struct seq_file *s, void *unused)
+{
+        pwrdm_for_each(pwrdm_dbg_show_counter, s);
+        clkdm_for_each(clkdm_dbg_show_counter, s);
+
+        return 0;
+}
+
+static int pm_dbg_show_timers(struct seq_file *s, void *unused)
+{
+        pwrdm_for_each(pwrdm_dbg_show_timer, s);
+        return 0;
+}
+
+static int pm_dbg_open(struct inode *inode, struct file *file)
+{
+        switch ((int)inode->i_private) {
+        case DEBUG_FILE_COUNTERS:
+                return single_open(file, pm_dbg_show_counters,
+                        &inode->i_private);
+        case DEBUG_FILE_TIMERS:
+        default:
+                return single_open(file, pm_dbg_show_timers,
+                        &inode->i_private);
+        };
+}
+
+static const struct file_operations debug_fops = {
+        .open           = pm_dbg_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+static int __init pwrdms_setup(struct powerdomain *pwrdm, void *unused)
+{
+        int i;
+        s64 t;
+
+        t = sched_clock();
+
+        for (i = 0; i < 4; i++)
+                pwrdm->state_timer[i] = 0;
+
+        pwrdm->timer = t;
+
+        return 0;
+}
+
+static int __init pm_dbg_init(void)
+{
+        struct dentry *d;
+
+        d = debugfs_create_dir("pm_debug", NULL);
+        if (IS_ERR(d))
+                return PTR_ERR(d);
+
+        (void) debugfs_create_file("count", S_IRUGO,
+                d, (void *)DEBUG_FILE_COUNTERS, &debug_fops);
+        (void) debugfs_create_file("time", S_IRUGO,
+                d, (void *)DEBUG_FILE_TIMERS, &debug_fops);
+
+        pwrdm_for_each(pwrdms_setup, NULL);
+
+        pm_dbg_init_done = 1;
+
+        return 0;
+}
+late_initcall(pm_dbg_init);
+
+#else
+void pm_dbg_update_time(struct powerdomain *pwrdm, int prev) {}
+#endif
diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
index 21201cd4117b..4589db1c8af8 100644
--- a/arch/arm/mach-omap2/pm.h
+++ b/arch/arm/mach-omap2/pm.h
@@ -11,12 +11,16 @@
 #ifndef __ARCH_ARM_MACH_OMAP2_PM_H
 #define __ARCH_ARM_MACH_OMAP2_PM_H
 
+#include <mach/powerdomain.h>
+
 #ifdef CONFIG_PM_DEBUG
 extern void omap2_pm_dump(int mode, int resume, unsigned int us);
 extern int omap2_pm_debug;
+extern void pm_dbg_update_time(struct powerdomain *pwrdm, int prev);
 #else
 #define omap2_pm_dump(mode, resume, us)         do {} while (0);
 #define omap2_pm_debug                          0
+#define pm_dbg_update_time(pwrdm, prev) do {} while (0);
 #endif /* CONFIG_PM_DEBUG */
 
 extern void omap24xx_idle_loop_suspend(void);
diff --git a/arch/arm/plat-omap/include/mach/powerdomain.h b/arch/arm/plat-omap/include/mach/powerdomain.h
index de03f3dbbf3d..6271d8556a40 100644
--- a/arch/arm/plat-omap/include/mach/powerdomain.h
+++ b/arch/arm/plat-omap/include/mach/powerdomain.h
@@ -119,6 +119,11 @@ struct powerdomain {
 
         int state;
         unsigned state_counter[4];
+
+#ifdef CONFIG_PM_DEBUG
+        s64 timer;
+        s64 state_timer[4];
+#endif
 };