| 1 | /* |
| 2 | * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> |
| 3 | * JZ4740 SoC clock support |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License as published by the |
| 7 | * Free Software Foundation; either version 2 of the License, or (at your |
| 8 | * option) any later version. |
| 9 | * |
| 10 | * You should have received a copy of the GNU General Public License along |
| 11 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 12 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #ifndef __JZ4740_CLOCK_H__ |
| 17 | #define __JZ4740_CLOCK_H__ |
| 18 | |
| 19 | struct jz4740_clock_board_data { |
| 20 | unsigned long ext_rate; |
| 21 | unsigned long rtc_rate; |
| 22 | }; |
| 23 | |
| 24 | extern struct jz4740_clock_board_data jz4740_clock_bdata; |
| 25 | |
| 26 | int jz4740_clock_init(void); |
| 27 | void jz4740_clock_suspend(void); |
| 28 | void jz4740_clock_resume(void); |
| 29 | |
| 30 | struct clk; |
| 31 | |
| 32 | struct clk_ops { |
| 33 | unsigned long (*get_rate)(struct clk* clk); |
| 34 | unsigned long (*round_rate)(struct clk *clk, unsigned long rate); |
| 35 | int (*set_rate)(struct clk* clk, unsigned long rate); |
| 36 | int (*enable)(struct clk* clk); |
| 37 | int (*disable)(struct clk* clk); |
| 38 | int (*is_enabled)(struct clk* clk); |
| 39 | |
| 40 | int (*set_parent)(struct clk* clk, struct clk *parent); |
| 41 | |
| 42 | }; |
| 43 | |
| 44 | struct clk { |
| 45 | const char *name; |
| 46 | struct clk* parent; |
| 47 | |
| 48 | uint32_t gate_bit; |
| 49 | |
| 50 | const struct clk_ops *ops; |
| 51 | |
| 52 | struct list_head list; |
| 53 | |
| 54 | #ifdef CONFIG_DEBUG_FS |
| 55 | struct dentry *debugfs_entry; |
| 56 | struct dentry *debugfs_parent_entry; |
| 57 | #endif |
| 58 | |
| 59 | }; |
| 60 | |
| 61 | #define JZ4740_CLK_NOT_GATED ((uint32_t)-1) |
| 62 | |
| 63 | int clk_is_enabled(struct clk *clk); |
| 64 | |
| 65 | #ifdef CONFIG_DEBUG_FS |
| 66 | void jz4740_clock_debugfs_init(void); |
| 67 | void jz4740_clock_debugfs_add_clk(struct clk *clk); |
| 68 | void jz4740_clock_debugfs_update_parent(struct clk *clk); |
| 69 | #else |
| 70 | static inline void jz4740_clock_debugfs_init(void) {}; |
| 71 | static inline void jz4740_clock_debugfs_add_clk(struct clk *clk) {}; |
| 72 | static inline void jz4740_clock_debugfs_update_parent(struct clk *clk) {}; |
| 73 | #endif |
| 74 | |
| 75 | #endif |
| 76 | |
