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SH: cpuidle: remove CPUIDLE_DRIVER_STATE_START usage
[karo-tx-linux.git] / arch / sh / kernel / cpu / shmobile / cpuidle.c
1 /*
2  * arch/sh/kernel/cpu/shmobile/cpuidle.c
3  *
4  * Cpuidle support code for SuperH Mobile
5  *
6  *  Copyright (C) 2009 Magnus Damm
7  *
8  * This file is subject to the terms and conditions of the GNU General Public
9  * License.  See the file "COPYING" in the main directory of this archive
10  * for more details.
11  */
12 #include <linux/init.h>
13 #include <linux/kernel.h>
14 #include <linux/io.h>
15 #include <linux/suspend.h>
16 #include <linux/cpuidle.h>
17 #include <linux/export.h>
18 #include <asm/suspend.h>
19 #include <asm/uaccess.h>
20
21 static unsigned long cpuidle_mode[] = {
22         SUSP_SH_SLEEP, /* regular sleep mode */
23         SUSP_SH_SLEEP | SUSP_SH_SF, /* sleep mode + self refresh */
24         SUSP_SH_STANDBY | SUSP_SH_SF, /* software standby mode + self refresh */
25 };
26
27 static int cpuidle_sleep_enter(struct cpuidle_device *dev,
28                                 struct cpuidle_driver *drv,
29                                 int index)
30 {
31         unsigned long allowed_mode = SUSP_SH_SLEEP;
32         int requested_state = index;
33         int allowed_state;
34         int k;
35
36         /* convert allowed mode to allowed state */
37         for (k = ARRAY_SIZE(cpuidle_mode) - 1; k > 0; k--)
38                 if (cpuidle_mode[k] == allowed_mode)
39                         break;
40
41         allowed_state = k;
42
43         /* take the following into account for sleep mode selection:
44          * - allowed_state: best mode allowed by hardware (clock deps)
45          * - requested_state: best mode allowed by software (latencies)
46          */
47         k = min_t(int, allowed_state, requested_state);
48
49         sh_mobile_call_standby(cpuidle_mode[k]);
50
51         return k;
52 }
53
54 static struct cpuidle_device cpuidle_dev;
55 static struct cpuidle_driver cpuidle_driver = {
56         .name                   = "sh_idle",
57         .owner                  = THIS_MODULE,
58         .en_core_tk_irqen       = 1,
59 };
60
61 void sh_mobile_setup_cpuidle(void)
62 {
63         struct cpuidle_device *dev = &cpuidle_dev;
64         struct cpuidle_driver *drv = &cpuidle_driver;
65         struct cpuidle_state *state;
66         int i = 0;
67
68         state = &drv->states[i++];
69         snprintf(state->name, CPUIDLE_NAME_LEN, "C1");
70         strncpy(state->desc, "SuperH Sleep Mode", CPUIDLE_DESC_LEN);
71         state->exit_latency = 1;
72         state->target_residency = 1 * 2;
73         state->power_usage = 3;
74         state->flags = 0;
75         state->flags |= CPUIDLE_FLAG_TIME_VALID;
76         state->enter = cpuidle_sleep_enter;
77
78         drv->safe_state_index = 0;
79
80         if (sh_mobile_sleep_supported & SUSP_SH_SF) {
81                 state = &drv->states[i++];
82                 snprintf(state->name, CPUIDLE_NAME_LEN, "C2");
83                 strncpy(state->desc, "SuperH Sleep Mode [SF]",
84                         CPUIDLE_DESC_LEN);
85                 state->exit_latency = 100;
86                 state->target_residency = 1 * 2;
87                 state->power_usage = 1;
88                 state->flags = 0;
89                 state->flags |= CPUIDLE_FLAG_TIME_VALID;
90                 state->enter = cpuidle_sleep_enter;
91         }
92
93         if (sh_mobile_sleep_supported & SUSP_SH_STANDBY) {
94                 state = &drv->states[i++];
95                 snprintf(state->name, CPUIDLE_NAME_LEN, "C3");
96                 strncpy(state->desc, "SuperH Mobile Standby Mode [SF]",
97                         CPUIDLE_DESC_LEN);
98                 state->exit_latency = 2300;
99                 state->target_residency = 1 * 2;
100                 state->power_usage = 1;
101                 state->flags = 0;
102                 state->flags |= CPUIDLE_FLAG_TIME_VALID;
103                 state->enter = cpuidle_sleep_enter;
104         }
105
106         drv->state_count = i;
107         dev->state_count = i;
108
109         cpuidle_register_driver(&cpuidle_driver);
110
111         cpuidle_register_device(dev);
112 }