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9952f691 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
8cb7cf56 SH |
2 | /* |
3 | * SCPI Message Protocol driver header | |
4 | * | |
5 | * Copyright (C) 2014 ARM Ltd. | |
8cb7cf56 | 6 | */ |
23818b3d SH |
7 | |
8 | #ifndef _LINUX_SCPI_PROTOCOL_H | |
9 | #define _LINUX_SCPI_PROTOCOL_H | |
10 | ||
8cb7cf56 SH |
11 | #include <linux/types.h> |
12 | ||
13 | struct scpi_opp { | |
14 | u32 freq; | |
15 | u32 m_volt; | |
16 | } __packed; | |
17 | ||
18 | struct scpi_dvfs_info { | |
19 | unsigned int count; | |
20 | unsigned int latency; /* in nanoseconds */ | |
21 | struct scpi_opp *opps; | |
22 | }; | |
23 | ||
38a1bdc9 PA |
24 | enum scpi_sensor_class { |
25 | TEMPERATURE, | |
26 | VOLTAGE, | |
27 | CURRENT, | |
28 | POWER, | |
fb3b07ef | 29 | ENERGY, |
38a1bdc9 PA |
30 | }; |
31 | ||
32 | struct scpi_sensor_info { | |
33 | u16 sensor_id; | |
34 | u8 class; | |
35 | u8 trigger_type; | |
36 | char name[20]; | |
37 | } __packed; | |
38 | ||
8cb7cf56 SH |
39 | /** |
40 | * struct scpi_ops - represents the various operations provided | |
41 | * by SCP through SCPI message protocol | |
42 | * @get_version: returns the major and minor revision on the SCPI | |
43 | * message protocol | |
44 | * @clk_get_range: gets clock range limit(min - max in Hz) | |
45 | * @clk_get_val: gets clock value(in Hz) | |
46 | * @clk_set_val: sets the clock value, setting to 0 will disable the | |
47 | * clock (if supported) | |
48 | * @dvfs_get_idx: gets the Operating Point of the given power domain. | |
49 | * OPP is an index to the list return by @dvfs_get_info | |
50 | * @dvfs_set_idx: sets the Operating Point of the given power domain. | |
51 | * OPP is an index to the list return by @dvfs_get_info | |
52 | * @dvfs_get_info: returns the DVFS capabilities of the given power | |
53 | * domain. It includes the OPP list and the latency information | |
54 | */ | |
55 | struct scpi_ops { | |
56 | u32 (*get_version)(void); | |
57 | int (*clk_get_range)(u16, unsigned long *, unsigned long *); | |
58 | unsigned long (*clk_get_val)(u16); | |
59 | int (*clk_set_val)(u16, unsigned long); | |
60 | int (*dvfs_get_idx)(u8); | |
61 | int (*dvfs_set_idx)(u8, u8); | |
62 | struct scpi_dvfs_info *(*dvfs_get_info)(u8); | |
45ca7df7 SH |
63 | int (*device_domain_id)(struct device *); |
64 | int (*get_transition_latency)(struct device *); | |
65 | int (*add_opps_to_device)(struct device *); | |
38a1bdc9 PA |
66 | int (*sensor_get_capability)(u16 *sensors); |
67 | int (*sensor_get_info)(u16 sensor_id, struct scpi_sensor_info *); | |
2e874159 | 68 | int (*sensor_get_value)(u16, u64 *); |
37a441dc SH |
69 | int (*device_get_power_state)(u16); |
70 | int (*device_set_power_state)(u16, u8); | |
8cb7cf56 SH |
71 | }; |
72 | ||
851df3dc | 73 | #if IS_REACHABLE(CONFIG_ARM_SCPI_PROTOCOL) |
8cb7cf56 SH |
74 | struct scpi_ops *get_scpi_ops(void); |
75 | #else | |
76 | static inline struct scpi_ops *get_scpi_ops(void) { return NULL; } | |
77 | #endif | |
23818b3d SH |
78 | |
79 | #endif /* _LINUX_SCPI_PROTOCOL_H */ |