| Shawn Guo | 30a7585 | 2010-12-18 21:39:33 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved. |
| 3 | * Copyright 2008 Juergen Beisert, kernel@pengutronix.de |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License |
| 7 | * as published by the Free Software Foundation; either version 2 |
| 8 | * of the License, or (at your option) any later version. |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| 17 | * MA 02110-1301, USA. |
| 18 | */ |
| 19 | |
| 20 | #ifndef __MACH_MXS_CLOCK_H__ |
| 21 | #define __MACH_MXS_CLOCK_H__ |
| 22 | |
| 23 | #ifndef __ASSEMBLY__ |
| 24 | #include <linux/list.h> |
| 25 | |
| 26 | struct module; |
| 27 | |
| 28 | struct clk { |
| 29 | int id; |
| 30 | /* Source clock this clk depends on */ |
| 31 | struct clk *parent; |
| Shawn Guo | 30a7585 | 2010-12-18 21:39:33 +0800 | [diff] [blame] | 32 | /* Reference count of clock enable/disable */ |
| 33 | __s8 usecount; |
| 34 | /* Register bit position for clock's enable/disable control. */ |
| 35 | u8 enable_shift; |
| 36 | /* Register address for clock's enable/disable control. */ |
| 37 | void __iomem *enable_reg; |
| 38 | u32 flags; |
| 39 | /* get the current clock rate (always a fresh value) */ |
| 40 | unsigned long (*get_rate) (struct clk *); |
| 41 | /* Function ptr to set the clock to a new rate. The rate must match a |
| 42 | supported rate returned from round_rate. Leave blank if clock is not |
| 43 | programmable */ |
| 44 | int (*set_rate) (struct clk *, unsigned long); |
| 45 | /* Function ptr to round the requested clock rate to the nearest |
| 46 | supported rate that is less than or equal to the requested rate. */ |
| 47 | unsigned long (*round_rate) (struct clk *, unsigned long); |
| 48 | /* Function ptr to enable the clock. Leave blank if clock can not |
| 49 | be gated. */ |
| 50 | int (*enable) (struct clk *); |
| 51 | /* Function ptr to disable the clock. Leave blank if clock can not |
| 52 | be gated. */ |
| 53 | void (*disable) (struct clk *); |
| 54 | /* Function ptr to set the parent clock of the clock. */ |
| 55 | int (*set_parent) (struct clk *, struct clk *); |
| 56 | }; |
| 57 | |
| 58 | int clk_register(struct clk *clk); |
| 59 | void clk_unregister(struct clk *clk); |
| 60 | |
| 61 | #endif /* __ASSEMBLY__ */ |
| 62 | #endif /* __MACH_MXS_CLOCK_H__ */ |