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1/*
2 * Generic OPP Interface
3 *
4 * Copyright (C) 2009-2010 Texas Instruments Incorporated.
5 * Nishanth Menon
6 * Romit Dasgupta
7 * Kevin Hilman
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#ifndef __LINUX_OPP_H__
15#define __LINUX_OPP_H__
16
17#include <linux/err.h>
03ca370f 18#include <linux/notifier.h>
e1f60b29 19
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20struct clk;
21struct regulator;
47d43ba7 22struct dev_pm_opp;
313162d0 23struct device;
91291d9a 24struct opp_table;
e1f60b29 25
47d43ba7 26enum dev_pm_opp_event {
129eec55 27 OPP_EVENT_ADD, OPP_EVENT_REMOVE, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
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28};
29
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30/**
31 * struct dev_pm_opp_supply - Power supply voltage/current values
32 * @u_volt: Target voltage in microvolts corresponding to this OPP
33 * @u_volt_min: Minimum voltage in microvolts corresponding to this OPP
34 * @u_volt_max: Maximum voltage in microvolts corresponding to this OPP
35 * @u_amp: Maximum current drawn by the device in microamperes
36 *
37 * This structure stores the voltage/current values for a single power supply.
38 */
39struct dev_pm_opp_supply {
40 unsigned long u_volt;
41 unsigned long u_volt_min;
42 unsigned long u_volt_max;
43 unsigned long u_amp;
44};
45
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46/**
47 * struct dev_pm_opp_info - OPP freq/voltage/current values
48 * @rate: Target clk rate in hz
49 * @supplies: Array of voltage/current values for all power supplies
50 *
51 * This structure stores the freq/voltage/current values for a single OPP.
52 */
53struct dev_pm_opp_info {
54 unsigned long rate;
55 struct dev_pm_opp_supply *supplies;
56};
57
58/**
59 * struct dev_pm_set_opp_data - Set OPP data
60 * @old_opp: Old OPP info
61 * @new_opp: New OPP info
62 * @regulators: Array of regulator pointers
63 * @regulator_count: Number of regulators
64 * @clk: Pointer to clk
65 * @dev: Pointer to the struct device
66 *
67 * This structure contains all information required for setting an OPP.
68 */
69struct dev_pm_set_opp_data {
70 struct dev_pm_opp_info old_opp;
71 struct dev_pm_opp_info new_opp;
72
73 struct regulator **regulators;
74 unsigned int regulator_count;
75 struct clk *clk;
76 struct device *dev;
77};
78
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79#if defined(CONFIG_PM_OPP)
80
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81struct opp_table *dev_pm_opp_get_opp_table(struct device *dev);
82void dev_pm_opp_put_opp_table(struct opp_table *opp_table);
83
47d43ba7 84unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);
e1f60b29 85
47d43ba7 86unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);
e1f60b29 87
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88bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp);
89
5d4879cd 90int dev_pm_opp_get_opp_count(struct device *dev);
3ca9bb33 91unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev);
655c9df9 92unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev);
21743447 93unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev);
3aa26a3b 94unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev);
e1f60b29 95
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96struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
97 unsigned long freq,
98 bool available);
e1f60b29 99
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100struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
101 unsigned long *freq);
e1f60b29 102
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103struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
104 unsigned long *freq);
7034764a 105void dev_pm_opp_put(struct dev_pm_opp *opp);
e1f60b29 106
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107int dev_pm_opp_add(struct device *dev, unsigned long freq,
108 unsigned long u_volt);
129eec55 109void dev_pm_opp_remove(struct device *dev, unsigned long freq);
e1f60b29 110
5d4879cd 111int dev_pm_opp_enable(struct device *dev, unsigned long freq);
e1f60b29 112
5d4879cd 113int dev_pm_opp_disable(struct device *dev, unsigned long freq);
e1f60b29 114
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115int dev_pm_opp_register_notifier(struct device *dev, struct notifier_block *nb);
116int dev_pm_opp_unregister_notifier(struct device *dev, struct notifier_block *nb);
117
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118struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev, const u32 *versions, unsigned int count);
119void dev_pm_opp_put_supported_hw(struct opp_table *opp_table);
120struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name);
121void dev_pm_opp_put_prop_name(struct opp_table *opp_table);
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122struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count);
123void dev_pm_opp_put_regulators(struct opp_table *opp_table);
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124struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev, int (*set_opp)(struct dev_pm_set_opp_data *data));
125void dev_pm_opp_register_put_opp_helper(struct opp_table *opp_table);
6a0712f6 126int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
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127int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask);
128int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
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129void dev_pm_opp_remove_table(struct device *dev);
130void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask);
e1f60b29 131#else
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132static inline struct opp_table *dev_pm_opp_get_opp_table(struct device *dev)
133{
134 return ERR_PTR(-ENOTSUPP);
135}
136
137static inline void dev_pm_opp_put_opp_table(struct opp_table *opp_table) {}
138
47d43ba7 139static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
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140{
141 return 0;
142}
143
47d43ba7 144static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
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145{
146 return 0;
147}
148
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149static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
150{
151 return false;
152}
153
5d4879cd 154static inline int dev_pm_opp_get_opp_count(struct device *dev)
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155{
156 return 0;
157}
158
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159static inline unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
160{
161 return 0;
162}
163
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164static inline unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
165{
166 return 0;
167}
168
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169static inline unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
170{
171 return 0;
172}
173
3aa26a3b 174static inline unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev)
4eafbd15 175{
3aa26a3b 176 return 0;
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177}
178
47d43ba7 179static inline struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
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180 unsigned long freq, bool available)
181{
d708b384 182 return ERR_PTR(-ENOTSUPP);
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183}
184
47d43ba7 185static inline struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
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186 unsigned long *freq)
187{
d708b384 188 return ERR_PTR(-ENOTSUPP);
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189}
190
47d43ba7 191static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
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192 unsigned long *freq)
193{
d708b384 194 return ERR_PTR(-ENOTSUPP);
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195}
196
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197static inline void dev_pm_opp_put(struct dev_pm_opp *opp) {}
198
5d4879cd 199static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
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200 unsigned long u_volt)
201{
d708b384 202 return -ENOTSUPP;
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203}
204
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205static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq)
206{
207}
208
5d4879cd 209static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
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210{
211 return 0;
212}
213
5d4879cd 214static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
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215{
216 return 0;
217}
03ca370f 218
dc2c9ad5 219static inline int dev_pm_opp_register_notifier(struct device *dev, struct notifier_block *nb)
03ca370f 220{
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221 return -ENOTSUPP;
222}
223
224static inline int dev_pm_opp_unregister_notifier(struct device *dev, struct notifier_block *nb)
225{
226 return -ENOTSUPP;
03ca370f 227}
7de36b0a 228
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229static inline struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev,
230 const u32 *versions,
231 unsigned int count)
7de36b0a 232{
fa30184d 233 return ERR_PTR(-ENOTSUPP);
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234}
235
fa30184d 236static inline void dev_pm_opp_put_supported_hw(struct opp_table *opp_table) {}
7de36b0a 237
fa30184d 238static inline struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev,
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239 int (*set_opp)(struct dev_pm_set_opp_data *data))
240{
fa30184d 241 return ERR_PTR(-ENOTSUPP);
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242}
243
fa30184d 244static inline void dev_pm_opp_register_put_opp_helper(struct opp_table *opp_table) {}
4dab160e 245
fa30184d 246static inline struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name)
01fb4d3c 247{
fa30184d 248 return ERR_PTR(-ENOTSUPP);
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249}
250
fa30184d 251static inline void dev_pm_opp_put_prop_name(struct opp_table *opp_table) {}
01fb4d3c 252
dfbe4678 253static inline struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count)
9f8ea969 254{
91291d9a 255 return ERR_PTR(-ENOTSUPP);
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256}
257
dfbe4678 258static inline void dev_pm_opp_put_regulators(struct opp_table *opp_table) {}
9f8ea969 259
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260static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
261{
d708b384 262 return -ENOTSUPP;
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263}
264
ddbb74bc 265static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask)
642aa8ce 266{
d708b384 267 return -ENOTSUPP;
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268}
269
ddbb74bc 270static inline int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
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271{
272 return -EINVAL;
273}
274
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275static inline void dev_pm_opp_remove_table(struct device *dev)
276{
277}
278
279static inline void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask)
280{
281}
282
a96d69d1 283#endif /* CONFIG_PM_OPP */
e1f60b29 284
d6561bb2 285#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
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286int dev_pm_opp_of_add_table(struct device *dev);
287void dev_pm_opp_of_remove_table(struct device *dev);
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288int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask);
289void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
290int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
0764c604 291struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev);
d6561bb2 292#else
8f8d37b2 293static inline int dev_pm_opp_of_add_table(struct device *dev)
d6561bb2 294{
d708b384 295 return -ENOTSUPP;
d6561bb2 296}
129eec55 297
8f8d37b2 298static inline void dev_pm_opp_of_remove_table(struct device *dev)
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299{
300}
8d4d4e98 301
ddbb74bc 302static inline int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask)
8d4d4e98 303{
d708b384 304 return -ENOTSUPP;
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305}
306
ddbb74bc 307static inline void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask)
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308{
309}
310
ddbb74bc 311static inline int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
8d4d4e98 312{
d708b384 313 return -ENOTSUPP;
8d4d4e98 314}
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315
316static inline struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev)
317{
318 return NULL;
319}
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320#endif
321
e1f60b29 322#endif /* __LINUX_OPP_H__ */