diff options
Diffstat (limited to 'arch/arm/plat-mxc/include/mach/clock.h')
| -rw-r--r-- | arch/arm/plat-mxc/include/mach/clock.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/include/mach/clock.h b/arch/arm/plat-mxc/include/mach/clock.h new file mode 100644 index 00000000000..d21f78e7881 --- /dev/null +++ b/arch/arm/plat-mxc/include/mach/clock.h @@ -0,0 +1,67 @@ +/* + * Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright 2008 Juergen Beisert, kernel@pengutronix.de + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + +#ifndef __ASM_ARCH_MXC_CLOCK_H__ +#define __ASM_ARCH_MXC_CLOCK_H__ + +#ifndef __ASSEMBLY__ +#include <linux/list.h> + +struct module; + +struct clk { + struct list_head node; + struct module *owner; + const char *name; + int id; + /* Source clock this clk depends on */ + struct clk *parent; + /* Secondary clock to enable/disable with this clock */ + struct clk *secondary; + /* Reference count of clock enable/disable */ + __s8 usecount; + /* Register bit position for clock's enable/disable control. */ + u8 enable_shift; + /* Register address for clock's enable/disable control. */ + void __iomem *enable_reg; + u32 flags; + /* get the current clock rate (always a fresh value) */ + unsigned long (*get_rate) (struct clk *); + /* Function ptr to set the clock to a new rate. The rate must match a + supported rate returned from round_rate. Leave blank if clock is not + programmable */ + int (*set_rate) (struct clk *, unsigned long); + /* Function ptr to round the requested clock rate to the nearest + supported rate that is less than or equal to the requested rate. */ + unsigned long (*round_rate) (struct clk *, unsigned long); + /* Function ptr to enable the clock. Leave blank if clock can not + be gated. */ + int (*enable) (struct clk *); + /* Function ptr to disable the clock. Leave blank if clock can not + be gated. */ + void (*disable) (struct clk *); + /* Function ptr to set the parent clock of the clock. */ + int (*set_parent) (struct clk *, struct clk *); +}; + +int clk_register(struct clk *clk); +void clk_unregister(struct clk *clk); + +#endif /* __ASSEMBLY__ */ +#endif /* __ASM_ARCH_MXC_CLOCK_H__ */ |