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 __ASM_ARCH_MXC_CLOCK_H__ 21#define __ASM_ARCH_MXC_CLOCK_H__ 22 23#ifndef __ASSEMBLY__ 24#include <linux/list.h> 25 26struct module; 27 28struct clk { 29 int id; 30 /* Source clock this clk depends on */ 31 struct clk *parent; 32 /* Secondary clock to enable/disable with this clock */ 33 struct clk *secondary; 34 /* Reference count of clock enable/disable */ 35 __s8 usecount; 36 /* Register bit position for clock's enable/disable control. */ 37 u8 enable_shift; 38 /* Register address for clock's enable/disable control. */ 39 void __iomem *enable_reg; 40 u32 flags; 41 /* get the current clock rate (always a fresh value) */ 42 unsigned long (*get_rate) (struct clk *); 43 /* Function ptr to set the clock to a new rate. The rate must match a 44 supported rate returned from round_rate. Leave blank if clock is not 45 programmable */ 46 int (*set_rate) (struct clk *, unsigned long); 47 /* Function ptr to round the requested clock rate to the nearest 48 supported rate that is less than or equal to the requested rate. */ 49 unsigned long (*round_rate) (struct clk *, unsigned long); 50 /* Function ptr to enable the clock. Leave blank if clock can not 51 be gated. */ 52 int (*enable) (struct clk *); 53 /* Function ptr to disable the clock. Leave blank if clock can not 54 be gated. */ 55 void (*disable) (struct clk *); 56 /* Function ptr to set the parent clock of the clock. */ 57 int (*set_parent) (struct clk *, struct clk *); 58}; 59 60int clk_register(struct clk *clk); 61void clk_unregister(struct clk *clk); 62 63unsigned long mxc_decode_pll(unsigned int pll, u32 f_ref); 64 65#endif /* __ASSEMBLY__ */ 66#endif /* __ASM_ARCH_MXC_CLOCK_H__ */ 67