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/clk.h>
25 #include <linux/err.h>
27 #include <linux/module.h>
28 #include <linux/slab.h>
31 #include "powerdomain.h"
32 #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);
51 DEBUG_FILE_COUNTERS
= 0,
55 static const char pwrdm_state_names
[][PWRDM_MAX_PWRSTS
] = {
62 void pm_dbg_update_time(struct powerdomain
*pwrdm
, int prev
)
66 if (!pm_dbg_init_done
)
69 /* Update timer for previous state */
72 pwrdm
->state_timer
[prev
] += t
- pwrdm
->timer
;
77 static int clkdm_dbg_show_counter(struct clockdomain
*clkdm
, void *user
)
79 struct seq_file
*s
= (struct seq_file
*)user
;
81 if (strcmp(clkdm
->name
, "emu_clkdm") == 0 ||
82 strcmp(clkdm
->name
, "wkup_clkdm") == 0 ||
83 strncmp(clkdm
->name
, "dpll", 4) == 0)
86 seq_printf(s
, "%s->%s (%d)", clkdm
->name
,
87 clkdm
->pwrdm
.ptr
->name
,
88 atomic_read(&clkdm
->usecount
));
94 static int pwrdm_dbg_show_counter(struct powerdomain
*pwrdm
, void *user
)
96 struct seq_file
*s
= (struct seq_file
*)user
;
99 if (strcmp(pwrdm
->name
, "emu_pwrdm") == 0 ||
100 strcmp(pwrdm
->name
, "wkup_pwrdm") == 0 ||
101 strncmp(pwrdm
->name
, "dpll", 4) == 0)
104 if (pwrdm
->state
!= pwrdm_read_pwrst(pwrdm
))
105 printk(KERN_ERR
"pwrdm state mismatch(%s) %d != %d\n",
106 pwrdm
->name
, pwrdm
->state
, pwrdm_read_pwrst(pwrdm
));
108 seq_printf(s
, "%s (%s)", pwrdm
->name
,
109 pwrdm_state_names
[pwrdm
->state
]);
110 for (i
= 0; i
< PWRDM_MAX_PWRSTS
; i
++)
111 seq_printf(s
, ",%s:%d", pwrdm_state_names
[i
],
112 pwrdm
->state_counter
[i
]);
114 seq_printf(s
, ",RET-LOGIC-OFF:%d", pwrdm
->ret_logic_off_counter
);
115 for (i
= 0; i
< pwrdm
->banks
; i
++)
116 seq_printf(s
, ",RET-MEMBANK%d-OFF:%d", i
+ 1,
117 pwrdm
->ret_mem_off_counter
[i
]);
124 static int pwrdm_dbg_show_timer(struct powerdomain
*pwrdm
, void *user
)
126 struct seq_file
*s
= (struct seq_file
*)user
;
129 if (strcmp(pwrdm
->name
, "emu_pwrdm") == 0 ||
130 strcmp(pwrdm
->name
, "wkup_pwrdm") == 0 ||
131 strncmp(pwrdm
->name
, "dpll", 4) == 0)
134 pwrdm_state_switch(pwrdm
);
136 seq_printf(s
, "%s (%s)", pwrdm
->name
,
137 pwrdm_state_names
[pwrdm
->state
]);
139 for (i
= 0; i
< 4; i
++)
140 seq_printf(s
, ",%s:%lld", pwrdm_state_names
[i
],
141 pwrdm
->state_timer
[i
]);
147 static int pm_dbg_show_counters(struct seq_file
*s
, void *unused
)
149 pwrdm_for_each(pwrdm_dbg_show_counter
, s
);
150 clkdm_for_each(clkdm_dbg_show_counter
, s
);
155 static int pm_dbg_show_timers(struct seq_file
*s
, void *unused
)
157 pwrdm_for_each(pwrdm_dbg_show_timer
, s
);
161 static int pm_dbg_open(struct inode
*inode
, struct file
*file
)
163 switch ((int)inode
->i_private
) {
164 case DEBUG_FILE_COUNTERS
:
165 return single_open(file
, pm_dbg_show_counters
,
167 case DEBUG_FILE_TIMERS
:
169 return single_open(file
, pm_dbg_show_timers
,
174 static const struct file_operations debug_fops
= {
178 .release
= single_release
,
181 static int pwrdm_suspend_get(void *data
, u64
*val
)
185 if (cpu_is_omap34xx())
186 ret
= omap3_pm_get_suspend_state((struct powerdomain
*)data
);
194 static int pwrdm_suspend_set(void *data
, u64 val
)
196 if (cpu_is_omap34xx())
197 return omap3_pm_set_suspend_state(
198 (struct powerdomain
*)data
, (int)val
);
202 DEFINE_SIMPLE_ATTRIBUTE(pwrdm_suspend_fops
, pwrdm_suspend_get
,
203 pwrdm_suspend_set
, "%llu\n");
205 static int __init
pwrdms_setup(struct powerdomain
*pwrdm
, void *dir
)
213 for (i
= 0; i
< 4; i
++)
214 pwrdm
->state_timer
[i
] = 0;
218 if (strncmp(pwrdm
->name
, "dpll", 4) == 0)
221 d
= debugfs_create_dir(pwrdm
->name
, (struct dentry
*)dir
);
222 if (!(IS_ERR_OR_NULL(d
)))
223 (void) debugfs_create_file("suspend", S_IRUGO
|S_IWUSR
, d
,
224 (void *)pwrdm
, &pwrdm_suspend_fops
);
229 static int option_get(void *data
, u64
*val
)
238 static int option_set(void *data
, u64 val
)
244 if (option
== &enable_off_mode
) {
246 omap_pm_enable_off_mode();
248 omap_pm_disable_off_mode();
249 if (cpu_is_omap34xx())
250 omap3_pm_off_mode_enable(val
);
256 DEFINE_SIMPLE_ATTRIBUTE(pm_dbg_option_fops
, option_get
, option_set
, "%llu\n");
258 static int __init
pm_dbg_init(void)
262 if (pm_dbg_init_done
)
265 d
= debugfs_create_dir("pm_debug", NULL
);
266 if (IS_ERR_OR_NULL(d
))
269 (void) debugfs_create_file("count", S_IRUGO
,
270 d
, (void *)DEBUG_FILE_COUNTERS
, &debug_fops
);
271 (void) debugfs_create_file("time", S_IRUGO
,
272 d
, (void *)DEBUG_FILE_TIMERS
, &debug_fops
);
274 pwrdm_for_each(pwrdms_setup
, (void *)d
);
276 (void) debugfs_create_file("enable_off_mode", S_IRUGO
| S_IWUSR
, d
,
277 &enable_off_mode
, &pm_dbg_option_fops
);
278 pm_dbg_init_done
= 1;
282 arch_initcall(pm_dbg_init
);