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Diffstat (limited to 'arch/arm/mach-tegra/dvfs.h')
-rw-r--r-- | arch/arm/mach-tegra/dvfs.h | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/dvfs.h b/arch/arm/mach-tegra/dvfs.h new file mode 100644 index 00000000000..eaecf425fe8 --- /dev/null +++ b/arch/arm/mach-tegra/dvfs.h | |||
@@ -0,0 +1,180 @@ | |||
1 | /* | ||
2 | * | ||
3 | * Copyright (C) 2010 Google, Inc. | ||
4 | * | ||
5 | * Author: | ||
6 | * Colin Cross <ccross@google.com> | ||
7 | * | ||
8 | * Copyright (C) 2010-2011 NVIDIA Corporation. | ||
9 | * | ||
10 | * This software is licensed under the terms of the GNU General Public | ||
11 | * License version 2, as published by the Free Software Foundation, and | ||
12 | * may be copied, distributed, and modified under those terms. | ||
13 | * | ||
14 | * This program is distributed in the hope that it will be useful, | ||
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
17 | * GNU General Public License for more details. | ||
18 | * | ||
19 | */ | ||
20 | |||
21 | #ifndef _TEGRA_DVFS_H_ | ||
22 | #define _TEGRA_DVFS_H_ | ||
23 | |||
24 | #define MAX_DVFS_FREQS 18 | ||
25 | #define DVFS_RAIL_STATS_TOP_BIN 40 | ||
26 | |||
27 | struct clk; | ||
28 | struct dvfs_rail; | ||
29 | |||
30 | /* | ||
31 | * dvfs_relationship between to rails, "from" and "to" | ||
32 | * when the rail changes, it will call dvfs_rail_update on the rails | ||
33 | * in the relationship_to list. | ||
34 | * when determining the voltage to set a rail to, it will consider each | ||
35 | * rail in the relationship_from list. | ||
36 | */ | ||
37 | struct dvfs_relationship { | ||
38 | struct dvfs_rail *to; | ||
39 | struct dvfs_rail *from; | ||
40 | int (*solve)(struct dvfs_rail *, struct dvfs_rail *); | ||
41 | |||
42 | struct list_head to_node; /* node in relationship_to list */ | ||
43 | struct list_head from_node; /* node in relationship_from list */ | ||
44 | bool solved_at_nominal; | ||
45 | }; | ||
46 | |||
47 | struct rail_stats { | ||
48 | ktime_t time_at_mv[DVFS_RAIL_STATS_TOP_BIN + 1]; | ||
49 | ktime_t last_update; | ||
50 | int last_index; | ||
51 | bool off; | ||
52 | }; | ||
53 | |||
54 | struct dvfs_rail { | ||
55 | const char *reg_id; | ||
56 | int min_millivolts; | ||
57 | int max_millivolts; | ||
58 | int nominal_millivolts; | ||
59 | int step; | ||
60 | bool jmp_to_zero; | ||
61 | bool disabled; | ||
62 | bool updating; | ||
63 | bool resolving_to; | ||
64 | |||
65 | struct list_head node; /* node in dvfs_rail_list */ | ||
66 | struct list_head dvfs; /* list head of attached dvfs clocks */ | ||
67 | struct list_head relationships_to; | ||
68 | struct list_head relationships_from; | ||
69 | struct regulator *reg; | ||
70 | int millivolts; | ||
71 | int new_millivolts; | ||
72 | bool suspended; | ||
73 | struct rail_stats stats; | ||
74 | }; | ||
75 | |||
76 | enum dvfs_alt_freqs { | ||
77 | ALT_FREQS_NOT_SUPPORTED = 0, | ||
78 | ALT_FREQS_DISABLED, | ||
79 | ALT_FREQS_ENABLED, | ||
80 | }; | ||
81 | |||
82 | struct dvfs { | ||
83 | /* Used only by tegra2_clock.c */ | ||
84 | const char *clk_name; | ||
85 | int speedo_id; | ||
86 | int process_id; | ||
87 | |||
88 | /* Must be initialized before tegra_dvfs_init */ | ||
89 | int freqs_mult; | ||
90 | unsigned long freqs[MAX_DVFS_FREQS]; | ||
91 | unsigned long alt_freqs[MAX_DVFS_FREQS]; | ||
92 | const int *millivolts; | ||
93 | struct dvfs_rail *dvfs_rail; | ||
94 | bool auto_dvfs; | ||
95 | enum dvfs_alt_freqs alt_freqs_state; | ||
96 | |||
97 | /* Filled in by tegra_dvfs_init */ | ||
98 | int max_millivolts; | ||
99 | int num_freqs; | ||
100 | |||
101 | int cur_millivolts; | ||
102 | unsigned long cur_rate; | ||
103 | struct list_head node; | ||
104 | struct list_head debug_node; | ||
105 | struct list_head reg_node; | ||
106 | }; | ||
107 | |||
108 | extern struct dvfs_rail *tegra_cpu_rail; | ||
109 | |||
110 | #ifdef CONFIG_TEGRA_SILICON_PLATFORM | ||
111 | void tegra_soc_init_dvfs(void); | ||
112 | int tegra_enable_dvfs_on_clk(struct clk *c, struct dvfs *d); | ||
113 | int dvfs_debugfs_init(struct dentry *clk_debugfs_root); | ||
114 | int tegra_dvfs_late_init(void); | ||
115 | int tegra_dvfs_init_rails(struct dvfs_rail *dvfs_rails[], int n); | ||
116 | void tegra_dvfs_add_relationships(struct dvfs_relationship *rels, int n); | ||
117 | void tegra_dvfs_rail_enable(struct dvfs_rail *rail); | ||
118 | void tegra_dvfs_rail_disable(struct dvfs_rail *rail); | ||
119 | bool tegra_dvfs_rail_updating(struct clk *clk); | ||
120 | void tegra_dvfs_rail_off(struct dvfs_rail *rail, ktime_t now); | ||
121 | void tegra_dvfs_rail_on(struct dvfs_rail *rail, ktime_t now); | ||
122 | void tegra_dvfs_rail_pause(struct dvfs_rail *rail, ktime_t delta, bool on); | ||
123 | struct dvfs_rail *tegra_dvfs_get_rail_by_name(const char *reg_id); | ||
124 | int tegra_dvfs_predict_millivolts(struct clk *c, unsigned long rate); | ||
125 | void tegra_dvfs_core_cap_enable(bool enable); | ||
126 | void tegra_dvfs_core_cap_level_set(int level); | ||
127 | int tegra_dvfs_alt_freqs_set(struct dvfs *d, bool enable); | ||
128 | void tegra_cpu_dvfs_alter(int edp_thermal_index, bool before_clk_update); | ||
129 | #else | ||
130 | static inline void tegra_soc_init_dvfs(void) | ||
131 | {} | ||
132 | static inline int tegra_enable_dvfs_on_clk(struct clk *c, struct dvfs *d) | ||
133 | { return 0; } | ||
134 | static inline int dvfs_debugfs_init(struct dentry *clk_debugfs_root) | ||
135 | { return 0; } | ||
136 | static inline int tegra_dvfs_late_init(void) | ||
137 | { return 0; } | ||
138 | static inline int tegra_dvfs_init_rails(struct dvfs_rail *dvfs_rails[], int n) | ||
139 | { return 0; } | ||
140 | static inline void tegra_dvfs_add_relationships(struct dvfs_relationship *rels, int n) | ||
141 | {} | ||
142 | static inline void tegra_dvfs_rail_enable(struct dvfs_rail *rail) | ||
143 | {} | ||
144 | static inline void tegra_dvfs_rail_disable(struct dvfs_rail *rail) | ||
145 | {} | ||
146 | static inline bool tegra_dvfs_rail_updating(struct clk *clk) | ||
147 | { return false; } | ||
148 | static inline void tegra_dvfs_rail_off(struct dvfs_rail *rail, ktime_t now) | ||
149 | {} | ||
150 | static inline void tegra_dvfs_rail_on(struct dvfs_rail *rail, ktime_t now) | ||
151 | {} | ||
152 | static inline void tegra_dvfs_rail_pause( | ||
153 | struct dvfs_rail *rail, ktime_t delta, bool on) | ||
154 | {} | ||
155 | static inline struct dvfs_rail *tegra_dvfs_get_rail_by_name(const char *reg_id) | ||
156 | { return NULL; } | ||
157 | static inline int tegra_dvfs_predict_millivolts(struct clk *c, unsigned long rate) | ||
158 | { return 0; } | ||
159 | static inline void tegra_dvfs_core_cap_enable(bool enable) | ||
160 | {} | ||
161 | static inline void tegra_dvfs_core_cap_level_set(int level) | ||
162 | {} | ||
163 | static inline int tegra_dvfs_alt_freqs_set(struct dvfs *d, bool enable) | ||
164 | { return 0; } | ||
165 | static inline void tegra_cpu_dvfs_alter(int edp_thermal_index, | ||
166 | bool before_clk_update) | ||
167 | {} | ||
168 | #endif | ||
169 | |||
170 | #ifndef CONFIG_ARCH_TEGRA_2x_SOC | ||
171 | int tegra_dvfs_rail_disable_prepare(struct dvfs_rail *rail); | ||
172 | int tegra_dvfs_rail_post_enable(struct dvfs_rail *rail); | ||
173 | #else | ||
174 | static inline int tegra_dvfs_rail_disable_prepare(struct dvfs_rail *rail) | ||
175 | { return 0; } | ||
176 | static inline int tegra_dvfs_rail_post_enable(struct dvfs_rail *rail) | ||
177 | { return 0; } | ||
178 | #endif | ||
179 | |||
180 | #endif | ||