diff options
Diffstat (limited to 'arch/arm/plat-omap/include/plat/clock.h')
| -rw-r--r-- | arch/arm/plat-omap/include/plat/clock.h | 100 |
1 files changed, 70 insertions, 30 deletions
diff --git a/arch/arm/plat-omap/include/plat/clock.h b/arch/arm/plat-omap/include/plat/clock.h index 94fe2a0ce40a..34f7fa9ad4c0 100644 --- a/arch/arm/plat-omap/include/plat/clock.h +++ b/arch/arm/plat-omap/include/plat/clock.h @@ -1,9 +1,9 @@ /* - * arch/arm/plat-omap/include/mach/clock.h + * OMAP clock: data structure definitions, function prototypes, shared macros * - * 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 + * Copyright (C) 2004-2005, 2008-2010 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 @@ -22,12 +22,13 @@ 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 *); + void (*find_idlest)(struct clk *, void __iomem **, + u8 *, u8 *); + void (*find_companion)(struct clk *, void __iomem **, + u8 *); }; -#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) || \ - defined(CONFIG_ARCH_OMAP4) +#ifdef CONFIG_ARCH_OMAP2PLUS struct clksel_rate { u32 val; @@ -40,6 +41,50 @@ struct clksel { const struct clksel_rate *rates; }; +/** + * struct dpll_data - DPLL registers and integration data + * @mult_div1_reg: register containing the DPLL M and N bitfields + * @mult_mask: mask of the DPLL M bitfield in @mult_div1_reg + * @div1_mask: mask of the DPLL N bitfield in @mult_div1_reg + * @clk_bypass: struct clk pointer to the clock's bypass clock input + * @clk_ref: struct clk pointer to the clock's reference clock input + * @control_reg: register containing the DPLL mode bitfield + * @enable_mask: mask of the DPLL mode bitfield in @control_reg + * @rate_tolerance: maximum variance allowed from target rate (in Hz) + * @last_rounded_rate: cache of the last rate result of omap2_dpll_round_rate() + * @last_rounded_m: cache of the last M result of omap2_dpll_round_rate() + * @max_multiplier: maximum valid non-bypass multiplier value (actual) + * @last_rounded_n: cache of the last N result of omap2_dpll_round_rate() + * @min_divider: minimum valid non-bypass divider value (actual) + * @max_divider: maximum valid non-bypass divider value (actual) + * @modes: possible values of @enable_mask + * @autoidle_reg: register containing the DPLL autoidle mode bitfield + * @idlest_reg: register containing the DPLL idle status bitfield + * @autoidle_mask: mask of the DPLL autoidle mode bitfield in @autoidle_reg + * @freqsel_mask: mask of the DPLL jitter correction bitfield in @control_reg + * @idlest_mask: mask of the DPLL idle status bitfield in @idlest_reg + * @auto_recal_bit: bitshift of the driftguard enable bit in @control_reg + * @recal_en_bit: bitshift of the PRM_IRQENABLE_* bit for recalibration IRQs + * @recal_st_bit: bitshift of the PRM_IRQSTATUS_* bit for recalibration IRQs + * @flags: DPLL type/features (see below) + * + * Possible values for @flags: + * DPLL_J_TYPE: "J-type DPLL" (only some 36xx, 4xxx DPLLs) + * NO_DCO_SEL: don't program DCO (only for some J-type DPLLs) + + * @freqsel_mask is only used on the OMAP34xx family and AM35xx. + * + * XXX Some DPLLs have multiple bypass inputs, so it's not technically + * correct to only have one @clk_bypass pointer. + * + * XXX @rate_tolerance should probably be deprecated - currently there + * don't seem to be any usecases for DPLL rounding that is not exact. + * + * XXX The runtime-variable fields (@last_rounded_rate, @last_rounded_m, + * @last_rounded_n) should be separated from the runtime-fixed fields + * and placed into a differenct structure, so that the runtime-fixed data + * can be placed into read-only space. + */ struct dpll_data { void __iomem *mult_div1_reg; u32 mult_mask; @@ -51,13 +96,12 @@ struct dpll_data { unsigned int rate_tolerance; unsigned long last_rounded_rate; u16 last_rounded_m; + u16 max_multiplier; 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; +#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4) void __iomem *autoidle_reg; void __iomem *idlest_reg; u32 autoidle_mask; @@ -66,6 +110,7 @@ struct dpll_data { u8 auto_recal_bit; u8 recal_en_bit; u8 recal_st_bit; + u8 flags; # endif }; @@ -75,12 +120,10 @@ 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); @@ -88,9 +131,9 @@ struct clk { 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; + u8 flags; +#ifdef CONFIG_ARCH_OMAP2PLUS void __iomem *clksel_reg; u32 clksel_mask; const struct clksel *clksel; @@ -123,7 +166,7 @@ struct clk_functions { #endif }; -extern unsigned int mpurate; +extern int mpurate; extern int clk_init(struct clk_functions *custom_clocks); extern void clk_preinit(struct clk *clk); @@ -134,27 +177,23 @@ 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); +unsigned long omap_fixed_divisor_recalc(struct clk *clk); #ifdef CONFIG_CPU_FREQ extern void clk_init_cpufreq_table(struct cpufreq_frequency_table **table); extern void clk_exit_cpufreq_table(struct cpufreq_frequency_table **table); #endif +extern struct clk *omap_clk_get_by_name(const char *name); extern const struct clkops clkops_null; +extern struct clk dummy_ck; + /* 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 */ +#define ENABLE_REG_32BIT (1 << 0) /* Use 32-bit access */ +#define CLOCK_IDLE_CONTROL (1 << 1) +#define CLOCK_NO_IDLE_PARENT (1 << 2) +#define ENABLE_ON_INIT (1 << 3) /* Enable upon framework init */ +#define INVERT_ENABLE (1 << 4) /* 0 enables, 1 disables */ /* Clksel_rate flags */ #define DEFAULT_RATE (1 << 0) @@ -162,7 +201,8 @@ extern const struct clkops clkops_null; #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_36XX (1 << 5) +#define RATE_IN_4430 (1 << 6) #define RATE_IN_24XX (RATE_IN_242X | RATE_IN_243X) |