| Sudeep Holla | 8cb7cf5 | 2015-03-30 10:59:52 +0100 | [diff] [blame^] | 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 |