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8cb7cf56 SH |
1 | /* |
2 | * SCPI Message Protocol driver header | |
3 | * | |
4 | * Copyright (C) 2014 ARM Ltd. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along with | |
16 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | */ | |
18 | #include <linux/types.h> | |
19 | ||
20 | struct scpi_opp { | |
21 | u32 freq; | |
22 | u32 m_volt; | |
23 | } __packed; | |
24 | ||
25 | struct scpi_dvfs_info { | |
26 | unsigned int count; | |
27 | unsigned int latency; /* in nanoseconds */ | |
28 | struct scpi_opp *opps; | |
29 | }; | |
30 | ||
31 | /** | |
32 | * struct scpi_ops - represents the various operations provided | |
33 | * by SCP through SCPI message protocol | |
34 | * @get_version: returns the major and minor revision on the SCPI | |
35 | * message protocol | |
36 | * @clk_get_range: gets clock range limit(min - max in Hz) | |
37 | * @clk_get_val: gets clock value(in Hz) | |
38 | * @clk_set_val: sets the clock value, setting to 0 will disable the | |
39 | * clock (if supported) | |
40 | * @dvfs_get_idx: gets the Operating Point of the given power domain. | |
41 | * OPP is an index to the list return by @dvfs_get_info | |
42 | * @dvfs_set_idx: sets the Operating Point of the given power domain. | |
43 | * OPP is an index to the list return by @dvfs_get_info | |
44 | * @dvfs_get_info: returns the DVFS capabilities of the given power | |
45 | * domain. It includes the OPP list and the latency information | |
46 | */ | |
47 | struct scpi_ops { | |
48 | u32 (*get_version)(void); | |
49 | int (*clk_get_range)(u16, unsigned long *, unsigned long *); | |
50 | unsigned long (*clk_get_val)(u16); | |
51 | int (*clk_set_val)(u16, unsigned long); | |
52 | int (*dvfs_get_idx)(u8); | |
53 | int (*dvfs_set_idx)(u8, u8); | |
54 | struct scpi_dvfs_info *(*dvfs_get_info)(u8); | |
55 | }; | |
56 | ||
57 | #if IS_ENABLED(CONFIG_ARM_SCPI_PROTOCOL) | |
58 | struct scpi_ops *get_scpi_ops(void); | |
59 | #else | |
60 | static inline struct scpi_ops *get_scpi_ops(void) { return NULL; } | |
61 | #endif |