diff options
Diffstat (limited to 'arch/arm/plat-mxs/include/mach/clock.h')
| -rw-r--r-- | arch/arm/plat-mxs/include/mach/clock.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/arch/arm/plat-mxs/include/mach/clock.h b/arch/arm/plat-mxs/include/mach/clock.h new file mode 100644 index 000000000000..b506468976b5 --- /dev/null +++ b/arch/arm/plat-mxs/include/mach/clock.h @@ -0,0 +1,127 @@ +/* + * Copyright (C) 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved. + * + * 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_ARM_ARCH_CLOCK_H +#define __ASM_ARM_ARCH_CLOCK_H + +#ifndef __ASSEMBLER__ + +#include <linux/list.h> +#include <asm/clkdev.h> + +struct clk { + int id; + struct clk *parent; + struct clk *secondary; + unsigned long flags; + + int ref; + unsigned int scale_bits; + unsigned int enable_bits; + unsigned int bypass_bits; + unsigned int busy_bits; + unsigned int xtal_busy_bits; + + unsigned int wait:1; + unsigned int invert:1; + + void __iomem *enable_reg; + void __iomem *scale_reg; + void __iomem *bypass_reg; + void __iomem *busy_reg; + + /* + * 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 get the clock rate. + */ + unsigned long (*get_rate) (struct clk *); + /* + * 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 *); + + /* Function ptr to change the parent clock depending + * the system configuration at that time. Will only + * change the parent clock if the ref count is 0 (the clock + * is not being used) + */ + int (*set_sys_dependent_parent) (struct clk *); + +}; + +int clk_get_usecount(struct clk *clk); +extern int clk_register(struct clk_lookup *lookup); +extern void clk_unregister(struct clk_lookup *lookup); + +bool clk_enable_h_autoslow(bool enable); +void clk_set_h_autoslow_flags(u16 mask); +void clk_en_public_h_asm_ctrl(bool (*enable_func)(bool), + void (*set_func)(u16)); + +struct mxs_emi_scaling_data { + u32 emi_div; + u32 frac_div; + u32 cur_freq; + u32 new_freq; +}; + + + +#ifdef CONFIG_MXS_RAM_FREQ_SCALING +extern int mxs_ram_freq_scale(struct mxs_emi_scaling_data *); +extern u32 mxs_ram_funcs_sz; +#else +static inline int mxs_ram_freq_scale(struct mxs_emi_scaling_data *p) +{ +} +static u32 mxs_ram_funcs_sz; +#endif + +/* Clock flags */ +/* 0 ~ 16 attribute flags */ +#define ALWAYS_ENABLED (1 << 0) /* Clock cannot be disabled */ +#define RATE_FIXED (1 << 1) /* Fixed clock rate */ +#define CPU_FREQ_TRIG_UPDATE (1 << 2) /* CPUFREQ trig update */ + +/* 16 ~ 23 reservied */ +/* 24 ~ 31 run time flags */ + +#define CLK_REF_UNIT 0x00010000 +#define CLK_REF_LIMIT 0xFFFF0000 +#define CLK_EN_MASK 0x0000FFFF +#endif /* __ASSEMBLER__ */ + +#endif |