2 * OMAP Power Management debug routines
4 * Copyright (C) 2005 Texas Instruments, Inc.
5 * Copyright (C) 2006-2008 Nokia Corporation
8 * Richard Woodruff <r-woodruff2@ti.com>
11 * Amit Kucheria <amit.kucheria@nokia.com>
12 * Igor Stoppa <igor.stoppa@nokia.com>
15 * Based on pm.c for omap2
17 * This program is free software; you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License version 2 as
19 * published by the Free Software Foundation.
22 #include <linux/kernel.h>
23 #include <linux/sched.h>
24 #include <linux/sched/clock.h>
25 #include <linux/clk.h>
26 #include <linux/err.h>
28 #include <linux/module.h>
29 #include <linux/slab.h>
32 #include "powerdomain.h"
33 #include "clockdomain.h"
36 #include "cm2xxx_3xxx.h"
37 #include "prm2xxx_3xxx.h"
42 #ifdef CONFIG_DEBUG_FS
43 #include <linux/debugfs.h>
44 #include <linux/seq_file.h>
46 static int pm_dbg_init_done;
48 static int pm_dbg_init(void);
50 static const char pwrdm_state_names[][PWRDM_MAX_PWRSTS] = {
57 void pm_dbg_update_time(struct powerdomain *pwrdm, int prev)
61 if (!pm_dbg_init_done)
64 /* Update timer for previous state */
67 pwrdm->state_timer[prev] += t - pwrdm->timer;
72 static int clkdm_dbg_show_counter(struct clockdomain *clkdm, void *user)
74 struct seq_file *s = (struct seq_file *)user;
76 if (strcmp(clkdm->name, "emu_clkdm") == 0 ||
77 strcmp(clkdm->name, "wkup_clkdm") == 0 ||
78 strncmp(clkdm->name, "dpll", 4) == 0)
81 seq_printf(s, "%s->%s (%d)\n", clkdm->name, clkdm->pwrdm.ptr->name,
87 static int pwrdm_dbg_show_counter(struct powerdomain *pwrdm, void *user)
89 struct seq_file *s = (struct seq_file *)user;
92 if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
93 strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
94 strncmp(pwrdm->name, "dpll", 4) == 0)
97 if (pwrdm->state != pwrdm_read_pwrst(pwrdm))
98 printk(KERN_ERR "pwrdm state mismatch(%s) %d != %d\n",
99 pwrdm->name, pwrdm->state, pwrdm_read_pwrst(pwrdm));
101 seq_printf(s, "%s (%s)", pwrdm->name,
102 pwrdm_state_names[pwrdm->state]);
103 for (i = 0; i < PWRDM_MAX_PWRSTS; i++)
104 seq_printf(s, ",%s:%d", pwrdm_state_names[i],
105 pwrdm->state_counter[i]);
107 seq_printf(s, ",RET-LOGIC-OFF:%d", pwrdm->ret_logic_off_counter);
108 for (i = 0; i < pwrdm->banks; i++)
109 seq_printf(s, ",RET-MEMBANK%d-OFF:%d", i + 1,
110 pwrdm->ret_mem_off_counter[i]);
116 static int pwrdm_dbg_show_timer(struct powerdomain *pwrdm, void *user)
118 struct seq_file *s = (struct seq_file *)user;
121 if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
122 strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
123 strncmp(pwrdm->name, "dpll", 4) == 0)
126 pwrdm_state_switch(pwrdm);
128 seq_printf(s, "%s (%s)", pwrdm->name,
129 pwrdm_state_names[pwrdm->state]);
131 for (i = 0; i < 4; i++)
132 seq_printf(s, ",%s:%lld", pwrdm_state_names[i],
133 pwrdm->state_timer[i]);
139 static int pm_dbg_counters_show(struct seq_file *s, void *unused)
141 pwrdm_for_each(pwrdm_dbg_show_counter, s);
142 clkdm_for_each(clkdm_dbg_show_counter, s);
146 DEFINE_SHOW_ATTRIBUTE(pm_dbg_counters);
148 static int pm_dbg_timers_show(struct seq_file *s, void *unused)
150 pwrdm_for_each(pwrdm_dbg_show_timer, s);
153 DEFINE_SHOW_ATTRIBUTE(pm_dbg_timers);
155 static int pwrdm_suspend_get(void *data, u64 *val)
159 if (cpu_is_omap34xx())
160 ret = omap3_pm_get_suspend_state((struct powerdomain *)data);
168 static int pwrdm_suspend_set(void *data, u64 val)
170 if (cpu_is_omap34xx())
171 return omap3_pm_set_suspend_state(
172 (struct powerdomain *)data, (int)val);
176 DEFINE_SIMPLE_ATTRIBUTE(pwrdm_suspend_fops, pwrdm_suspend_get,
177 pwrdm_suspend_set, "%llu\n");
179 static int __init pwrdms_setup(struct powerdomain *pwrdm, void *dir)
187 for (i = 0; i < 4; i++)
188 pwrdm->state_timer[i] = 0;
192 if (strncmp(pwrdm->name, "dpll", 4) == 0)
195 d = debugfs_create_dir(pwrdm->name, (struct dentry *)dir);
197 (void) debugfs_create_file("suspend", S_IRUGO|S_IWUSR, d,
198 (void *)pwrdm, &pwrdm_suspend_fops);
203 static int option_get(void *data, u64 *val)
212 static int option_set(void *data, u64 val)
218 if (option == &enable_off_mode) {
219 if (cpu_is_omap34xx())
220 omap3_pm_off_mode_enable(val);
226 DEFINE_SIMPLE_ATTRIBUTE(pm_dbg_option_fops, option_get, option_set, "%llu\n");
228 static int __init pm_dbg_init(void)
232 if (pm_dbg_init_done)
235 d = debugfs_create_dir("pm_debug", NULL);
239 (void) debugfs_create_file("count", 0444, d, NULL, &pm_dbg_counters_fops);
240 (void) debugfs_create_file("time", 0444, d, NULL, &pm_dbg_timers_fops);
242 pwrdm_for_each(pwrdms_setup, (void *)d);
244 (void) debugfs_create_file("enable_off_mode", S_IRUGO | S_IWUSR, d,
245 &enable_off_mode, &pm_dbg_option_fops);
246 pm_dbg_init_done = 1;
250 omap_arch_initcall(pm_dbg_init);