From: Tero Kristo <[EMAIL PROTECTED]>
This patch adds a few files to the debug file system for PM debugging
purposes. Enabled with kernel config options CONFIG_PM_DEBUG and
CONFIG_DEBUG_FS. Data available in debug filesystem after this patch:
- State enter counters for power domains (OFF, RET, ON)
- State timers for the above (in ns)
- PM register dumps with programmable save points
- Current power domain states
- Interface to set_pwrdm_state()
This patch depends on the PM workaround set from Jouni Hogander.
Signed-off-by: Tero Kristo <[EMAIL PROTECTED]>
---
arch/arm/mach-omap2/clock.c | 2 +
arch/arm/mach-omap2/clockdomain.c | 27 ++
arch/arm/mach-omap2/pm-debug.c | 406 +++++++++++++++++++++++++
arch/arm/mach-omap2/pm.c | 2 +
arch/arm/mach-omap2/pm.h | 33 ++-
arch/arm/mach-omap2/pm34xx.c | 6 +-
arch/arm/mach-omap2/powerdomain.c | 69 +++++
arch/arm/plat-omap/include/mach/powerdomain.h | 7 +-
8 files changed, 548 insertions(+), 4 deletions(-)
diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c
index 88c8ef4..a5fc5b0 100644
--- a/arch/arm/mach-omap2/clock.c
+++ b/arch/arm/mach-omap2/clock.c
@@ -39,6 +39,7 @@
#include "cm.h"
#include "cm-regbits-24xx.h"
#include "cm-regbits-34xx.h"
+#include "pm.h"
#define MAX_CLOCK_ENABLE_WAIT 100000
@@ -1025,5 +1026,6 @@ void omap2_clk_disable_unused(struct clk *clk)
printk(KERN_INFO "Disabling unused clock \"%s\"\n", clk->name);
_omap2_clk_disable(clk);
+ pm_dbg_clk_state_switch(clk);
}
#endif
diff --git a/arch/arm/mach-omap2/clockdomain.c
b/arch/arm/mach-omap2/clockdomain.c
index fa62f14..9670ed1 100644
--- a/arch/arm/mach-omap2/clockdomain.c
+++ b/arch/arm/mach-omap2/clockdomain.c
@@ -36,6 +36,8 @@
#include <mach/powerdomain.h>
#include <mach/clockdomain.h>
+#include "pm.h"
+
/* clkdm_list contains all registered struct clockdomains */
static LIST_HEAD(clkdm_list);
@@ -567,6 +569,8 @@ int omap2_clkdm_clk_enable(struct clockdomain *clkdm,
struct clk *clk)
else
omap2_clkdm_wakeup(clkdm);
+ pm_dbg_clkdm_state_switch(clkdm);
+
return 0;
}
@@ -618,6 +622,29 @@ int omap2_clkdm_clk_disable(struct clockdomain *clkdm,
struct clk *clk)
else
omap2_clkdm_sleep(clkdm);
+ pm_dbg_clkdm_state_switch(clkdm);
+
+ return 0;
+}
+
+#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+int clkdm_dbg_show_counters(struct seq_file *s, void *unused)
+{
+ struct clockdomain *clkdm;
+
+ list_for_each_entry(clkdm, &clkdm_list, node) {
+ if (strcmp(clkdm->name, "emu_clkdm") == 0 ||
+ strcmp(clkdm->name, "wkup_clkdm") == 0)
+ continue;
+ seq_printf(s, "%s->%s (%d)", clkdm->name,
+ clkdm->pwrdm.ptr->name,
+ atomic_read(&clkdm->usecount));
+ seq_printf(s, "\n");
+ }
+
return 0;
}
+#endif
diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c
index b00f5f4..380a2a0 100644
--- a/arch/arm/mach-omap2/pm-debug.c
+++ b/arch/arm/mach-omap2/pm-debug.c
@@ -30,6 +30,9 @@
#include <mach/clock.h>
#include <mach/board.h>
+#include <mach/powerdomain.h>
+#include <mach/clockdomain.h>
+#include <mach/common.h>
#include "prm.h"
#include "cm.h"
#include "pm.h"
@@ -153,4 +156,407 @@ void omap2_pm_dump(int mode, int resume, unsigned int us)
printk("%-20s: 0x%08x\n", regs[i].name, regs[i].val);
}
+#ifdef CONFIG_DEBUG_FS
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+static void pm_dbg_regset_store(u32 *ptr);
+
+struct dentry *pm_dbg_dir;
+
+static int pm_dbg_init_done;
+
+enum {
+ PM_DBG_STATE_NOW = 0,
+ PM_DBG_STATE_PREV,
+};
+
+struct pm_module_def {
+ char name[8]; /* Name of the module */
+ short type; /* CM or PRM */
+ unsigned short offset;
+ int low; /* First register address on this module */
+ int high; /* Last register address on this module */
+};
+
+#define MOD_CM 0
+#define MOD_PRM 1
+
+static const struct pm_module_def pm_dbg_reg_modules[] = {
+ { "IVA2", MOD_CM, OMAP3430_IVA2_MOD, 0, 0x4c },
+ { "OCP", MOD_CM, OCP_MOD, 0, 0x10 },
+ { "MPU", MOD_CM, MPU_MOD, 4, 0x4c },
+ { "CORE", MOD_CM, CORE_MOD, 0, 0x4c },
+ { "SGX", MOD_CM, OMAP3430ES2_SGX_MOD, 0, 0x4c },
+ { "WKUP", MOD_CM, WKUP_MOD, 0, 0x40 },
+ { "CCR", MOD_CM, PLL_MOD, 0, 0x70 },
+ { "DSS", MOD_CM, OMAP3430_DSS_MOD, 0, 0x4c },
+ { "CAM", MOD_CM, OMAP3430_CAM_MOD, 0, 0x4c },
+ { "PER", MOD_CM, OMAP3430_PER_MOD, 0, 0x4c },
+ { "EMU", MOD_CM, OMAP3430_EMU_MOD, 0x40, 0x54 },
+ { "NEON", MOD_CM, OMAP3430_NEON_MOD, 0x20, 0x48 },
+ { "USB", MOD_CM, OMAP3430ES2_USBHOST_MOD, 0, 0x4c },
+
+ { "IVA2", MOD_PRM, OMAP3430_IVA2_MOD, 0x50, 0xfc },
+ { "OCP", MOD_PRM, OCP_MOD, 4, 0x1c },
+ { "MPU", MOD_PRM, MPU_MOD, 0x58, 0xe8 },
+ { "CORE", MOD_PRM, CORE_MOD, 0x58, 0xf8 },
+ { "SGX", MOD_PRM, OMAP3430ES2_SGX_MOD, 0x58, 0xe8 },
+ { "WKUP", MOD_PRM, WKUP_MOD, 0xa0, 0xb0 },
+ { "CCR", MOD_PRM, PLL_MOD, 0x40, 0x70 },
+ { "DSS", MOD_PRM, OMAP3430_DSS_MOD, 0x58, 0xe8 },
+ { "CAM", MOD_PRM, OMAP3430_CAM_MOD, 0x58, 0xe8 },
+ { "PER", MOD_PRM, OMAP3430_PER_MOD, 0x58, 0xe8 },
+ { "EMU", MOD_PRM, OMAP3430_EMU_MOD, 0x58, 0xe4 },
+ { "GLBL", MOD_PRM, OMAP3430_GR_MOD, 0x20, 0xe4 },
+ { "NEON", MOD_PRM, OMAP3430_NEON_MOD, 0x58, 0xe8 },
+ { "USB", MOD_PRM, OMAP3430ES2_USBHOST_MOD, 0x58, 0xe8 },
+ { "", 0, 0, 0, 0 },
+};
+
+#define PM_DBG_MAX_REG_SETS 4
+
+static void *pm_dbg_reg_set[PM_DBG_MAX_REG_SETS];
+
+static int pm_dbg_get_regset_size(void)
+{
+ static int regset_size;
+
+ if (regset_size == 0) {
+ int i = 0;
+
+ while (pm_dbg_reg_modules[i].name[0] != 0) {
+ regset_size += pm_dbg_reg_modules[i].high +
+ 4 - pm_dbg_reg_modules[i].low;
+ i++;
+ }
+ }
+ return regset_size;
+}
+
+static int pm_dbg_show_regs(struct seq_file *s, void *unused)
+{
+ int i, j;
+ unsigned long val;
+ int reg_set = (int)s->private;
+ u32 *ptr;
+ void *store = NULL;
+ int regs;
+
+ if (reg_set == 0) {
+ store = kmalloc(pm_dbg_get_regset_size(), GFP_KERNEL);
+ ptr = store;
+ pm_dbg_regset_store(ptr);
+ } else {
+ ptr = pm_dbg_reg_set[reg_set - 1];
+ }
+
+ i = 0;
+
+ while (pm_dbg_reg_modules[i].name[0] != 0) {
+ regs = 0;
+ if (pm_dbg_reg_modules[i].type == MOD_CM)
+ seq_printf(s, "MOD: CM_%s (%08x)\n",
+ pm_dbg_reg_modules[i].name,
+ (u32)(OMAP2_CM_BASE +
+ pm_dbg_reg_modules[i].offset));
+ else
+ seq_printf(s, "MOD: PRM_%s (%08x)\n",
+ pm_dbg_reg_modules[i].name,
+ (u32)(OMAP2_PRM_BASE +
+ pm_dbg_reg_modules[i].offset));
+
+ for (j = pm_dbg_reg_modules[i].low;
+ j <= pm_dbg_reg_modules[i].high; j += 4) {
+ val = *(ptr++);
+ if (val != 0) {
+ regs++;
+ seq_printf(s, " %02x => %08lx", j, val);
+ if (regs % 4 == 0)
+ seq_printf(s, "\n");
+ }
+ }
+ seq_printf(s, "\n");
+ i++;
+ }
+
+ if (store != NULL)
+ kfree(store);
+
+ return 0;
+}
+
+static void pm_dbg_regset_store(u32 *ptr)
+{
+ int i, j;
+ u32 val;
+
+ i = 0;
+
+ while (pm_dbg_reg_modules[i].name[0] != 0) {
+ for (j = pm_dbg_reg_modules[i].low;
+ j <= pm_dbg_reg_modules[i].high; j += 4) {
+ if (pm_dbg_reg_modules[i].type == MOD_CM)
+ val = cm_read_mod_reg(
+ pm_dbg_reg_modules[i].offset, j);
+ else
+ val = prm_read_mod_reg(
+ pm_dbg_reg_modules[i].offset, j);
+ *(ptr++) = val;
+ }
+ i++;
+ }
+}
+
+int pm_dbg_regset_save(int reg_set)
+{
+ if (pm_dbg_reg_set[reg_set-1] == NULL)
+ return -EINVAL;
+
+ pm_dbg_regset_store(pm_dbg_reg_set[reg_set-1]);
+
+ return 0;
+}
+
+static int _pm_dbg_state_switch(struct powerdomain *pwrdm, int flag)
+{
+ s64 t;
+ struct timespec now;
+ int prev;
+ int state;
+
+ if (pwrdm == NULL)
+ return -EINVAL;
+
+ state = pwrdm_read_pwrst(pwrdm);
+
+ switch (flag) {
+ case PM_DBG_STATE_NOW:
+ prev = pwrdm->state;
+ break;
+ case PM_DBG_STATE_PREV:
+ prev = pwrdm_read_prev_pwrst(pwrdm);
+ if (pwrdm->state != prev)
+ pwrdm->state_counter[prev]++;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (pm_dbg_init_done) {
+ /* Update timer for previous state */
+ getnstimeofday(&now);
+ t = timespec_to_ns(&now);
+
+ pwrdm->state_timer[prev] += t - pwrdm->timer;
+
+ pwrdm->timer = t;
+
+ if (state != prev)
+ pwrdm->state_counter[state]++;
+ }
+
+ pwrdm->state = state;
+
+ return 0;
+}
+
+int pm_dbg_pwrdm_state_switch(struct powerdomain *pwrdm)
+{
+ return _pm_dbg_state_switch(pwrdm, PM_DBG_STATE_NOW);
+}
+
+int pm_dbg_clkdm_state_switch(struct clockdomain *clkdm)
+{
+ if (clkdm != NULL && clkdm->pwrdm.ptr != NULL) {
+ pwrdm_wait_transition(clkdm->pwrdm.ptr);
+ return pm_dbg_pwrdm_state_switch(clkdm->pwrdm.ptr);
+ }
+
+ return -EINVAL;
+}
+
+int pm_dbg_clk_state_switch(struct clk *clk)
+{
+ if (clk != NULL && clk->clkdm.ptr != NULL)
+ return pm_dbg_clkdm_state_switch(clk->clkdm.ptr);
+ return -EINVAL;
+}
+
+static int pm_dbg_pre_suspend_cb(struct powerdomain *pwrdm)
+{
+ pwrdm_clear_all_prev_pwrst(pwrdm);
+ _pm_dbg_state_switch(pwrdm, PM_DBG_STATE_NOW);
+ return 0;
+}
+
+static int pm_dbg_post_suspend_cb(struct powerdomain *pwrdm)
+{
+ _pm_dbg_state_switch(pwrdm, PM_DBG_STATE_PREV);
+ return 0;
+}
+
+int pm_dbg_pre_suspend(void)
+{
+ pwrdm_for_each(pm_dbg_pre_suspend_cb);
+ return 0;
+}
+
+int pm_dbg_post_suspend(void)
+{
+ pwrdm_for_each(pm_dbg_post_suspend_cb);
+ return 0;
+}
+
+enum {
+ DEBUG_FILE_COUNTERS = 0,
+ DEBUG_FILE_TIMERS,
+};
+
+int pm_dbg_show_counters(struct seq_file *s, void *unused)
+{
+ pwrdm_dbg_show_counters(s, unused);
+ clkdm_dbg_show_counters(s, unused);
+
+ 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, pwrdm_dbg_show_timers,
+ &inode->i_private);
+ };
+}
+
+static int pm_dbg_reg_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pm_dbg_show_regs, inode->i_private);
+}
+
+static const struct file_operations debug_fops = {
+ .open = pm_dbg_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static const struct file_operations debug_reg_fops = {
+ .open = pm_dbg_reg_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int pm_dbg_get_state(void *data, u64 *val)
+{
+ *val = pwrdm_read_pwrst((struct powerdomain *)data);
+ return 0;
+}
+static int pm_dbg_set_state(void *data, u64 val)
+{
+ set_pwrdm_state((struct powerdomain *)data, val);
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(debug_pwrdm_fops, pm_dbg_get_state, pm_dbg_set_state,
"%llu\n");
+
+int pm_dbg_regset_init(int reg_set)
+{
+ char name[2];
+
+ if (reg_set < 1 || reg_set > PM_DBG_MAX_REG_SETS ||
+ pm_dbg_reg_set[reg_set-1] != NULL)
+ return -EINVAL;
+
+ pm_dbg_reg_set[reg_set-1] =
+ kmalloc(pm_dbg_get_regset_size(), GFP_KERNEL);
+
+ if (pm_dbg_reg_set[reg_set-1] == NULL)
+ return -ENOMEM;
+
+ if (pm_dbg_dir != NULL) {
+ sprintf(name, "%d", reg_set);
+
+ (void) debugfs_create_file(name, S_IRUGO,
+ pm_dbg_dir, (void *)reg_set, &debug_reg_fops);
+ }
+
+ return 0;
+}
+
+static int __init pwrdms_setup(struct powerdomain *pwrdm)
+{
+ s64 t;
+ int i;
+ struct timespec now;
+
+ getnstimeofday(&now);
+ t = timespec_to_ns(&now);
+
+ for (i = 0; i < 4; i++) {
+ pwrdm->state_counter[i] = 0;
+ pwrdm->state_timer[i] = 0;
+ }
+
+ pwrdm_wait_transition(pwrdm);
+ pwrdm->state = pwrdm_read_pwrst(pwrdm);
+ pwrdm->state_counter[pwrdm->state] = 1;
+ pwrdm->timer = t;
+
+ (void) debugfs_create_file(pwrdm->name, S_IRUGO|S_IWUSR,
+ pm_dbg_dir, pwrdm, &debug_pwrdm_fops);
+
+ return 0;
+}
+
+static int __init pm_dbg_init(void)
+{
+ int i;
+ struct dentry *d;
+ char name[2];
+
+ printk(KERN_INFO "pm_dbg_init()\n");
+
+ 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);
+
+ pm_dbg_dir = debugfs_create_dir("pwrdm_ctrl", d);
+ if (IS_ERR(pm_dbg_dir))
+ return PTR_ERR(pm_dbg_dir);
+
+ pwrdm_for_each(pwrdms_setup);
+
+ pm_dbg_dir = debugfs_create_dir("registers", d);
+ if (IS_ERR(pm_dbg_dir))
+ return PTR_ERR(pm_dbg_dir);
+
+ (void) debugfs_create_file("current", S_IRUGO,
+ pm_dbg_dir, (void *)0, &debug_reg_fops);
+
+ for (i = 0; i < PM_DBG_MAX_REG_SETS; i++)
+ if (pm_dbg_reg_set[i] != NULL) {
+ sprintf(name, "%d", i+1);
+ (void) debugfs_create_file(name, S_IRUGO,
+ pm_dbg_dir, (void *)(i+1), &debug_reg_fops);
+
+ }
+
+ pm_dbg_init_done = 1;
+
+ return 0;
+}
+late_initcall(pm_dbg_init);
+#endif
+
#endif
diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c
index b8aae08..c063565 100644
--- a/arch/arm/mach-omap2/pm.c
+++ b/arch/arm/mach-omap2/pm.c
@@ -28,6 +28,8 @@
#include <asm/mach/time.h>
#include <asm/atomic.h>
+#include <mach/powerdomain.h>
+
#include <mach/pm.h>
#include "pm.h"
diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
index 60a386d..19da5c7 100644
--- a/arch/arm/mach-omap2/pm.h
+++ b/arch/arm/mach-omap2/pm.h
@@ -28,7 +28,36 @@ extern void omap2_allow_sleep(void);
extern void omap2_pm_dump(int mode, int resume, unsigned int us);
extern int omap2_pm_debug;
#else
-#define omap2_pm_dump(mode, resume, us) do {} while (0);
-#define omap2_pm_debug 0
+#define omap2_pm_dump(mode, resume, us) do {} while (0);
+#define omap2_pm_debug 0
+#endif
+
+#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
+struct seq_file;
+struct clk;
+struct clockdomain;
+struct powerdomain;
+extern int pm_dbg_pwrdm_state_switch(struct powerdomain *pwrdm);
+extern int pm_dbg_clkdm_state_switch(struct clockdomain *clkdm);
+extern int pm_dbg_clk_state_switch(struct clk *clk);
+extern int pm_dbg_pre_suspend(void);
+extern int pm_dbg_post_suspend(void);
+extern int pm_dbg_regset_save(int reg_set);
+extern int pm_dbg_regset_init(int reg_set);
+extern int pwrdm_dbg_show_counters(struct seq_file *s, void *unused);
+extern int pwrdm_dbg_show_timers(struct seq_file *s, void *unused);
+extern int clkdm_dbg_show_counters(struct seq_file *s, void *unused);
+extern int set_pwrdm_state(struct powerdomain *pwrdm, u32 state);
+#else
+#define pm_dbg_pwrdm_state_switch(domain) do; while (0)
+#define pm_dbg_clkdm_state_switch(domain) do; while (0)
+#define pm_dbg_clk_state_switch(domain) do; while (0)
+#define pm_dbg_pre_suspend() do; while (0)
+#define pm_dbg_post_suspend() do; while (0)
+#define pm_dbg_regset_save(reg_set) do; while (0)
+#define pm_dbg_regset_init(reg_set) do; while (0)
+#define pwrdm_dbg_show_counters(s,unused) do; while (0)
+#define pwrdm_dbg_show_timers(s,unused) do; while (0)
+#define clkdm_dbg_show_counters(s,unused) do; while (0)
#endif /* CONFIG_PM_DEBUG */
#endif
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 32922ae..e0d1b1f 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -208,6 +208,8 @@ static void omap_sram_idle(void)
return;
}
+ pm_dbg_pre_suspend();
+
omap2_gpio_prepare_for_retention();
/* Disable GPIO clocks if allowed */
@@ -225,6 +227,8 @@ static void omap_sram_idle(void)
per_gpio_clk_enable();
omap2_gpio_resume_after_retention();
+
+ pm_dbg_post_suspend();
}
/*
@@ -298,7 +302,7 @@ static int _clkdm_allow_idle(struct powerdomain *pwrdm,
/* This sets pwrdm state (other than mpu & core. Currently only ON &
* RET are supported. Function is assuming that clkdm doesn't have
* hw_sup mode enabled. */
-static int set_pwrdm_state(struct powerdomain *pwrdm, u32 state)
+int set_pwrdm_state(struct powerdomain *pwrdm, u32 state)
{
u32 cur_state;
int ret = 0;
diff --git a/arch/arm/mach-omap2/powerdomain.c
b/arch/arm/mach-omap2/powerdomain.c
index 73e2971..097d5c4 100644
--- a/arch/arm/mach-omap2/powerdomain.c
+++ b/arch/arm/mach-omap2/powerdomain.c
@@ -1110,4 +1110,73 @@ int pwrdm_wait_transition(struct powerdomain *pwrdm)
return 0;
}
+#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include "pm.h"
+
+static const char pwrdm_state_names[][4] = {
+ "OFF",
+ "RET",
+ "INA",
+ "ON"
+};
+
+int pwrdm_dbg_show_counters(struct seq_file *s, void *unused)
+{
+ int i;
+ struct powerdomain *pwrdm;
+ unsigned long flags;
+
+ read_lock_irqsave(&pwrdm_rwlock, flags);
+ list_for_each_entry(pwrdm, &pwrdm_list, node) {
+ if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
+ strcmp(pwrdm->name, "wkup_pwrdm") == 0)
+ continue;
+ 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");
+ }
+ read_unlock_irqrestore(&pwrdm_rwlock, flags);
+
+ return 0;
+}
+
+int pwrdm_dbg_show_timers(struct seq_file *s, void *unused)
+{
+ int i;
+ struct powerdomain *pwrdm;
+ unsigned long flags;
+
+ read_lock_irqsave(&pwrdm_rwlock, flags);
+ list_for_each_entry(pwrdm, &pwrdm_list, node) {
+ if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
+ strcmp(pwrdm->name, "wkup_pwrdm") == 0)
+ continue;
+
+ /* Update timer for current state */
+ pm_dbg_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");
+ }
+ read_unlock_irqrestore(&pwrdm_rwlock, flags);
+
+ return 0;
+}
+
+#endif
diff --git a/arch/arm/plat-omap/include/mach/powerdomain.h
b/arch/arm/plat-omap/include/mach/powerdomain.h
index 4948cb7..8785cb7 100644
--- a/arch/arm/plat-omap/include/mach/powerdomain.h
+++ b/arch/arm/plat-omap/include/mach/powerdomain.h
@@ -116,7 +116,12 @@ struct powerdomain {
struct clockdomain *pwrdm_clkdms[PWRDM_MAX_CLKDMS];
struct list_head node;
-
+#ifdef CONFIG_PM_DEBUG
+ int state;
+ int state_counter[4];
+ s64 timer;
+ s64 state_timer[4];
+#endif
};
--
1.6.0
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