diff options
Diffstat (limited to 'arch/arm/plat-omap/include/plat/clock.h')
| -rw-r--r-- | arch/arm/plat-omap/include/plat/clock.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/include/plat/clock.h b/arch/arm/plat-omap/include/plat/clock.h new file mode 100644 index 000000000000..309b6d1dccdb --- /dev/null +++ b/arch/arm/plat-omap/include/plat/clock.h @@ -0,0 +1,168 @@ +/* + * arch/arm/plat-omap/include/mach/clock.h + * + * Copyright (C) 2004 - 2005 Nokia corporation + * Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com> + * Based on clocks.h by Tony Lindgren, Gordon McNutt and RidgeRun, Inc + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __ARCH_ARM_OMAP_CLOCK_H +#define __ARCH_ARM_OMAP_CLOCK_H + +#include <linux/list.h> + +struct module; +struct clk; +struct clockdomain; + +struct clkops { + int (*enable)(struct clk *); + void (*disable)(struct clk *); + void (*find_idlest)(struct clk *, void __iomem **, u8 *); + void (*find_companion)(struct clk *, void __iomem **, u8 *); +}; + +#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) || \ + defined(CONFIG_ARCH_OMAP4) + +struct clksel_rate { + u32 val; + u8 div; + u8 flags; +}; + +struct clksel { + struct clk *parent; + const struct clksel_rate *rates; +}; + +struct dpll_data { + void __iomem *mult_div1_reg; + u32 mult_mask; + u32 div1_mask; + struct clk *clk_bypass; + struct clk *clk_ref; + void __iomem *control_reg; + u32 enable_mask; + unsigned int rate_tolerance; + unsigned long last_rounded_rate; + u16 last_rounded_m; + u8 last_rounded_n; + u8 min_divider; + u8 max_divider; + u32 max_tolerance; + u16 max_multiplier; +#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4) + u8 modes; + void __iomem *autoidle_reg; + void __iomem *idlest_reg; + u32 autoidle_mask; + u32 freqsel_mask; + u32 idlest_mask; + u8 auto_recal_bit; + u8 recal_en_bit; + u8 recal_st_bit; +# endif +}; + +#endif + +struct clk { + struct list_head node; + const struct clkops *ops; + const char *name; + int id; + struct clk *parent; + struct list_head children; + struct list_head sibling; /* node for children */ + unsigned long rate; + __u32 flags; + void __iomem *enable_reg; + unsigned long (*recalc)(struct clk *); + int (*set_rate)(struct clk *, unsigned long); + long (*round_rate)(struct clk *, unsigned long); + void (*init)(struct clk *); + __u8 enable_bit; + __s8 usecount; +#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) || \ + defined(CONFIG_ARCH_OMAP4) + u8 fixed_div; + void __iomem *clksel_reg; + u32 clksel_mask; + const struct clksel *clksel; + struct dpll_data *dpll_data; + const char *clkdm_name; + struct clockdomain *clkdm; +#else + __u8 rate_offset; + __u8 src_offset; +#endif +#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS) + struct dentry *dent; /* For visible tree hierarchy */ +#endif +}; + +struct cpufreq_frequency_table; + +struct clk_functions { + int (*clk_enable)(struct clk *clk); + void (*clk_disable)(struct clk *clk); + long (*clk_round_rate)(struct clk *clk, unsigned long rate); + int (*clk_set_rate)(struct clk *clk, unsigned long rate); + int (*clk_set_parent)(struct clk *clk, struct clk *parent); + void (*clk_allow_idle)(struct clk *clk); + void (*clk_deny_idle)(struct clk *clk); + void (*clk_disable_unused)(struct clk *clk); +#ifdef CONFIG_CPU_FREQ + void (*clk_init_cpufreq_table)(struct cpufreq_frequency_table **); +#endif +}; + +extern unsigned int mpurate; + +extern int clk_init(struct clk_functions *custom_clocks); +extern void clk_preinit(struct clk *clk); +extern int clk_register(struct clk *clk); +extern void clk_reparent(struct clk *child, struct clk *parent); +extern void clk_unregister(struct clk *clk); +extern void propagate_rate(struct clk *clk); +extern void recalculate_root_clocks(void); +extern unsigned long followparent_recalc(struct clk *clk); +extern void clk_enable_init_clocks(void); +#ifdef CONFIG_CPU_FREQ +extern void clk_init_cpufreq_table(struct cpufreq_frequency_table **table); +#endif + +extern const struct clkops clkops_null; + +/* Clock flags */ +/* bit 0 is free */ +#define RATE_FIXED (1 << 1) /* Fixed clock rate */ +/* bits 2-4 are free */ +#define ENABLE_REG_32BIT (1 << 5) /* Use 32-bit access */ +#define CLOCK_IDLE_CONTROL (1 << 7) +#define CLOCK_NO_IDLE_PARENT (1 << 8) +#define DELAYED_APP (1 << 9) /* Delay application of clock */ +#define CONFIG_PARTICIPANT (1 << 10) /* Fundamental clock */ +#define ENABLE_ON_INIT (1 << 11) /* Enable upon framework init */ +#define INVERT_ENABLE (1 << 12) /* 0 enables, 1 disables */ +#define CLOCK_IN_OMAP4430 (1 << 13) +#define ALWAYS_ENABLED (1 << 14) +/* bits 13-31 are currently free */ + +/* Clksel_rate flags */ +#define DEFAULT_RATE (1 << 0) +#define RATE_IN_242X (1 << 1) +#define RATE_IN_243X (1 << 2) +#define RATE_IN_343X (1 << 3) /* rates common to all 343X */ +#define RATE_IN_3430ES2 (1 << 4) /* 3430ES2 rates only */ +#define RATE_IN_4430 (1 << 5) + +#define RATE_IN_24XX (RATE_IN_242X | RATE_IN_243X) + + +#endif |