Joseph Lo | dab403e | 2012-08-16 17:31:48 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 15 | */ |
| 16 | |
Prashant Gaikwad | 89572c7 | 2013-01-11 13:16:21 +0530 | [diff] [blame] | 17 | #ifndef __LINUX_CLK_TEGRA_H_ |
| 18 | #define __LINUX_CLK_TEGRA_H_ |
Joseph Lo | dab403e | 2012-08-16 17:31:48 +0800 | [diff] [blame] | 19 | |
Prashant Gaikwad | 61fd290 | 2013-01-11 13:16:26 +0530 | [diff] [blame^] | 20 | #include <linux/clk.h> |
| 21 | |
Joseph Lo | dab403e | 2012-08-16 17:31:48 +0800 | [diff] [blame] | 22 | /* |
| 23 | * Tegra CPU clock and reset control ops |
| 24 | * |
| 25 | * wait_for_reset: |
| 26 | * keep waiting until the CPU in reset state |
| 27 | * put_in_reset: |
| 28 | * put the CPU in reset state |
| 29 | * out_of_reset: |
| 30 | * release the CPU from reset state |
| 31 | * enable_clock: |
| 32 | * CPU clock un-gate |
| 33 | * disable_clock: |
| 34 | * CPU clock gate |
Joseph Lo | a6e293e | 2012-10-31 17:41:19 +0800 | [diff] [blame] | 35 | * rail_off_ready: |
| 36 | * CPU is ready for rail off |
| 37 | * suspend: |
| 38 | * save the clock settings when CPU go into low-power state |
| 39 | * resume: |
| 40 | * restore the clock settings when CPU exit low-power state |
Joseph Lo | dab403e | 2012-08-16 17:31:48 +0800 | [diff] [blame] | 41 | */ |
| 42 | struct tegra_cpu_car_ops { |
| 43 | void (*wait_for_reset)(u32 cpu); |
| 44 | void (*put_in_reset)(u32 cpu); |
| 45 | void (*out_of_reset)(u32 cpu); |
| 46 | void (*enable_clock)(u32 cpu); |
| 47 | void (*disable_clock)(u32 cpu); |
Joseph Lo | a6e293e | 2012-10-31 17:41:19 +0800 | [diff] [blame] | 48 | #ifdef CONFIG_PM_SLEEP |
| 49 | bool (*rail_off_ready)(void); |
| 50 | void (*suspend)(void); |
| 51 | void (*resume)(void); |
| 52 | #endif |
Joseph Lo | dab403e | 2012-08-16 17:31:48 +0800 | [diff] [blame] | 53 | }; |
| 54 | |
| 55 | extern struct tegra_cpu_car_ops *tegra_cpu_car_ops; |
| 56 | |
| 57 | static inline void tegra_wait_cpu_in_reset(u32 cpu) |
| 58 | { |
| 59 | if (WARN_ON(!tegra_cpu_car_ops->wait_for_reset)) |
| 60 | return; |
| 61 | |
| 62 | tegra_cpu_car_ops->wait_for_reset(cpu); |
| 63 | } |
| 64 | |
| 65 | static inline void tegra_put_cpu_in_reset(u32 cpu) |
| 66 | { |
| 67 | if (WARN_ON(!tegra_cpu_car_ops->put_in_reset)) |
| 68 | return; |
| 69 | |
| 70 | tegra_cpu_car_ops->put_in_reset(cpu); |
| 71 | } |
| 72 | |
| 73 | static inline void tegra_cpu_out_of_reset(u32 cpu) |
| 74 | { |
| 75 | if (WARN_ON(!tegra_cpu_car_ops->out_of_reset)) |
| 76 | return; |
| 77 | |
| 78 | tegra_cpu_car_ops->out_of_reset(cpu); |
| 79 | } |
| 80 | |
| 81 | static inline void tegra_enable_cpu_clock(u32 cpu) |
| 82 | { |
| 83 | if (WARN_ON(!tegra_cpu_car_ops->enable_clock)) |
| 84 | return; |
| 85 | |
| 86 | tegra_cpu_car_ops->enable_clock(cpu); |
| 87 | } |
| 88 | |
| 89 | static inline void tegra_disable_cpu_clock(u32 cpu) |
| 90 | { |
| 91 | if (WARN_ON(!tegra_cpu_car_ops->disable_clock)) |
| 92 | return; |
| 93 | |
| 94 | tegra_cpu_car_ops->disable_clock(cpu); |
| 95 | } |
| 96 | |
Joseph Lo | a6e293e | 2012-10-31 17:41:19 +0800 | [diff] [blame] | 97 | #ifdef CONFIG_PM_SLEEP |
| 98 | static inline bool tegra_cpu_rail_off_ready(void) |
| 99 | { |
| 100 | if (WARN_ON(!tegra_cpu_car_ops->rail_off_ready)) |
| 101 | return false; |
| 102 | |
| 103 | return tegra_cpu_car_ops->rail_off_ready(); |
| 104 | } |
| 105 | |
| 106 | static inline void tegra_cpu_clock_suspend(void) |
| 107 | { |
| 108 | if (WARN_ON(!tegra_cpu_car_ops->suspend)) |
| 109 | return; |
| 110 | |
| 111 | tegra_cpu_car_ops->suspend(); |
| 112 | } |
| 113 | |
| 114 | static inline void tegra_cpu_clock_resume(void) |
| 115 | { |
| 116 | if (WARN_ON(!tegra_cpu_car_ops->resume)) |
| 117 | return; |
| 118 | |
| 119 | tegra_cpu_car_ops->resume(); |
| 120 | } |
| 121 | #endif |
| 122 | |
Joseph Lo | dab403e | 2012-08-16 17:31:48 +0800 | [diff] [blame] | 123 | void tegra20_cpu_car_ops_init(void); |
| 124 | void tegra30_cpu_car_ops_init(void); |
Prashant Gaikwad | 61fd290 | 2013-01-11 13:16:26 +0530 | [diff] [blame^] | 125 | void tegra_periph_reset_deassert(struct clk *c); |
| 126 | void tegra_periph_reset_assert(struct clk *c); |
| 127 | void tegra_clocks_init(void); |
Joseph Lo | dab403e | 2012-08-16 17:31:48 +0800 | [diff] [blame] | 128 | |
Prashant Gaikwad | 89572c7 | 2013-01-11 13:16:21 +0530 | [diff] [blame] | 129 | #endif /* __LINUX_CLK_TEGRA_H_ */ |