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8c4bc91063
The 'mpurate' option, historically used for specifying an initial MPU rate at boot, no longer has any effect due to the supporting code being removed as it was 'wrong and dangerous' [1]. This patch removes the remaining dead code associated with the __setup macros to avoid confusion and reduce bloat. [1] https://patchwork.kernel.org/patch/5954631/ Signed-off-by: Andrew Murray <amurray@embedded-bits.co.uk> Acked-by: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: Tony Lindgren <tony@atomide.com>
291 lines
10 KiB
C
291 lines
10 KiB
C
/*
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* linux/arch/arm/mach-omap1/clock.h
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*
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* Copyright (C) 2004 - 2005, 2009 Nokia corporation
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* Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
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* Based on clocks.h by Tony Lindgren, Gordon McNutt and RidgeRun, Inc
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ARCH_ARM_MACH_OMAP1_CLOCK_H
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#define __ARCH_ARM_MACH_OMAP1_CLOCK_H
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#include <linux/clk.h>
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#include <linux/list.h>
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#include <linux/clkdev.h>
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struct module;
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struct clk;
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struct omap_clk {
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u16 cpu;
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struct clk_lookup lk;
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};
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#define CLK(dev, con, ck, cp) \
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{ \
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.cpu = cp, \
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.lk = { \
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.dev_id = dev, \
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.con_id = con, \
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.clk = ck, \
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}, \
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}
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/* Platform flags for the clkdev-OMAP integration code */
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#define CK_310 (1 << 0)
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#define CK_7XX (1 << 1) /* 7xx, 850 */
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#define CK_1510 (1 << 2)
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#define CK_16XX (1 << 3) /* 16xx, 17xx, 5912 */
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#define CK_1710 (1 << 4) /* 1710 extra for rate selection */
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/* Temporary, needed during the common clock framework conversion */
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#define __clk_get_name(clk) (clk->name)
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#define __clk_get_parent(clk) (clk->parent)
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#define __clk_get_rate(clk) (clk->rate)
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/**
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* struct clkops - some clock function pointers
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* @enable: fn ptr that enables the current clock in hardware
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* @disable: fn ptr that enables the current clock in hardware
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* @find_idlest: function returning the IDLEST register for the clock's IP blk
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* @find_companion: function returning the "companion" clk reg for the clock
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* @allow_idle: fn ptr that enables autoidle for the current clock in hardware
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* @deny_idle: fn ptr that disables autoidle for the current clock in hardware
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*
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* A "companion" clk is an accompanying clock to the one being queried
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* that must be enabled for the IP module connected to the clock to
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* become accessible by the hardware. Neither @find_idlest nor
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* @find_companion should be needed; that information is IP
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* block-specific; the hwmod code has been created to handle this, but
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* until hwmod data is ready and drivers have been converted to use PM
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* runtime calls in place of clk_enable()/clk_disable(), @find_idlest and
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* @find_companion must, unfortunately, remain.
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*/
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struct clkops {
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int (*enable)(struct clk *);
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void (*disable)(struct clk *);
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void (*find_idlest)(struct clk *, void __iomem **,
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u8 *, u8 *);
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void (*find_companion)(struct clk *, void __iomem **,
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u8 *);
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void (*allow_idle)(struct clk *);
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void (*deny_idle)(struct clk *);
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};
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/*
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* struct clk.flags possibilities
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*
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* XXX document the rest of the clock flags here
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*
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* CLOCK_CLKOUTX2: (OMAP4 only) DPLL CLKOUT and CLKOUTX2 GATE_CTRL
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* bits share the same register. This flag allows the
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* omap4_dpllmx*() code to determine which GATE_CTRL bit field
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* should be used. This is a temporary solution - a better approach
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* would be to associate clock type-specific data with the clock,
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* similar to the struct dpll_data approach.
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*/
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#define ENABLE_REG_32BIT (1 << 0) /* Use 32-bit access */
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#define CLOCK_IDLE_CONTROL (1 << 1)
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#define CLOCK_NO_IDLE_PARENT (1 << 2)
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#define ENABLE_ON_INIT (1 << 3) /* Enable upon framework init */
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#define INVERT_ENABLE (1 << 4) /* 0 enables, 1 disables */
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#define CLOCK_CLKOUTX2 (1 << 5)
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/**
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* struct clk - OMAP struct clk
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* @node: list_head connecting this clock into the full clock list
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* @ops: struct clkops * for this clock
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* @name: the name of the clock in the hardware (used in hwmod data and debug)
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* @parent: pointer to this clock's parent struct clk
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* @children: list_head connecting to the child clks' @sibling list_heads
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* @sibling: list_head connecting this clk to its parent clk's @children
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* @rate: current clock rate
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* @enable_reg: register to write to enable the clock (see @enable_bit)
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* @recalc: fn ptr that returns the clock's current rate
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* @set_rate: fn ptr that can change the clock's current rate
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* @round_rate: fn ptr that can round the clock's current rate
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* @init: fn ptr to do clock-specific initialization
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* @enable_bit: bitshift to write to enable/disable the clock (see @enable_reg)
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* @usecount: number of users that have requested this clock to be enabled
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* @fixed_div: when > 0, this clock's rate is its parent's rate / @fixed_div
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* @flags: see "struct clk.flags possibilities" above
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* @rate_offset: bitshift for rate selection bitfield (OMAP1 only)
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* @src_offset: bitshift for source selection bitfield (OMAP1 only)
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*
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* XXX @rate_offset, @src_offset should probably be removed and OMAP1
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* clock code converted to use clksel.
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*
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* XXX @usecount is poorly named. It should be "enable_count" or
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* something similar. "users" in the description refers to kernel
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* code (core code or drivers) that have called clk_enable() and not
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* yet called clk_disable(); the usecount of parent clocks is also
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* incremented by the clock code when clk_enable() is called on child
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* clocks and decremented by the clock code when clk_disable() is
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* called on child clocks.
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*
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* XXX @clkdm, @usecount, @children, @sibling should be marked for
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* internal use only.
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*
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* @children and @sibling are used to optimize parent-to-child clock
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* tree traversals. (child-to-parent traversals use @parent.)
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*
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* XXX The notion of the clock's current rate probably needs to be
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* separated from the clock's target rate.
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*/
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struct clk {
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struct list_head node;
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const struct clkops *ops;
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const char *name;
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struct clk *parent;
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struct list_head children;
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struct list_head sibling; /* node for children */
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unsigned long rate;
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void __iomem *enable_reg;
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unsigned long (*recalc)(struct clk *);
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int (*set_rate)(struct clk *, unsigned long);
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long (*round_rate)(struct clk *, unsigned long);
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void (*init)(struct clk *);
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u8 enable_bit;
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s8 usecount;
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u8 fixed_div;
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u8 flags;
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u8 rate_offset;
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u8 src_offset;
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#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
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struct dentry *dent; /* For visible tree hierarchy */
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#endif
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};
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struct clk_functions {
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int (*clk_enable)(struct clk *clk);
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void (*clk_disable)(struct clk *clk);
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long (*clk_round_rate)(struct clk *clk, unsigned long rate);
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int (*clk_set_rate)(struct clk *clk, unsigned long rate);
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int (*clk_set_parent)(struct clk *clk, struct clk *parent);
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void (*clk_allow_idle)(struct clk *clk);
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void (*clk_deny_idle)(struct clk *clk);
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void (*clk_disable_unused)(struct clk *clk);
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};
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extern int clk_init(struct clk_functions *custom_clocks);
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extern void clk_preinit(struct clk *clk);
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extern int clk_register(struct clk *clk);
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extern void clk_reparent(struct clk *child, struct clk *parent);
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extern void clk_unregister(struct clk *clk);
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extern void propagate_rate(struct clk *clk);
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extern void recalculate_root_clocks(void);
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extern unsigned long followparent_recalc(struct clk *clk);
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extern void clk_enable_init_clocks(void);
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unsigned long omap_fixed_divisor_recalc(struct clk *clk);
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extern struct clk *omap_clk_get_by_name(const char *name);
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extern int omap_clk_enable_autoidle_all(void);
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extern int omap_clk_disable_autoidle_all(void);
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extern const struct clkops clkops_null;
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extern struct clk dummy_ck;
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int omap1_clk_init(void);
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void omap1_clk_late_init(void);
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extern int omap1_clk_enable(struct clk *clk);
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extern void omap1_clk_disable(struct clk *clk);
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extern long omap1_clk_round_rate(struct clk *clk, unsigned long rate);
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extern int omap1_clk_set_rate(struct clk *clk, unsigned long rate);
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extern unsigned long omap1_ckctl_recalc(struct clk *clk);
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extern int omap1_set_sossi_rate(struct clk *clk, unsigned long rate);
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extern unsigned long omap1_sossi_recalc(struct clk *clk);
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extern unsigned long omap1_ckctl_recalc_dsp_domain(struct clk *clk);
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extern int omap1_clk_set_rate_dsp_domain(struct clk *clk, unsigned long rate);
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extern int omap1_set_uart_rate(struct clk *clk, unsigned long rate);
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extern unsigned long omap1_uart_recalc(struct clk *clk);
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extern int omap1_set_ext_clk_rate(struct clk *clk, unsigned long rate);
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extern long omap1_round_ext_clk_rate(struct clk *clk, unsigned long rate);
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extern void omap1_init_ext_clk(struct clk *clk);
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extern int omap1_select_table_rate(struct clk *clk, unsigned long rate);
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extern long omap1_round_to_table_rate(struct clk *clk, unsigned long rate);
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extern int omap1_clk_set_rate_ckctl_arm(struct clk *clk, unsigned long rate);
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extern long omap1_clk_round_rate_ckctl_arm(struct clk *clk, unsigned long rate);
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extern unsigned long omap1_watchdog_recalc(struct clk *clk);
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#ifdef CONFIG_OMAP_RESET_CLOCKS
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extern void omap1_clk_disable_unused(struct clk *clk);
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#else
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#define omap1_clk_disable_unused NULL
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#endif
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struct uart_clk {
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struct clk clk;
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unsigned long sysc_addr;
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};
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/* Provide a method for preventing idling some ARM IDLECT clocks */
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struct arm_idlect1_clk {
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struct clk clk;
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unsigned long no_idle_count;
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__u8 idlect_shift;
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};
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/* ARM_CKCTL bit shifts */
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#define CKCTL_PERDIV_OFFSET 0
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#define CKCTL_LCDDIV_OFFSET 2
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#define CKCTL_ARMDIV_OFFSET 4
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#define CKCTL_DSPDIV_OFFSET 6
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#define CKCTL_TCDIV_OFFSET 8
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#define CKCTL_DSPMMUDIV_OFFSET 10
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/*#define ARM_TIMXO 12*/
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#define EN_DSPCK 13
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/*#define ARM_INTHCK_SEL 14*/ /* Divide-by-2 for mpu inth_ck */
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/* DSP_CKCTL bit shifts */
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#define CKCTL_DSPPERDIV_OFFSET 0
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/* ARM_IDLECT2 bit shifts */
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#define EN_WDTCK 0
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#define EN_XORPCK 1
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#define EN_PERCK 2
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#define EN_LCDCK 3
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#define EN_LBCK 4 /* Not on 1610/1710 */
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/*#define EN_HSABCK 5*/
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#define EN_APICK 6
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#define EN_TIMCK 7
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#define DMACK_REQ 8
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#define EN_GPIOCK 9 /* Not on 1610/1710 */
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/*#define EN_LBFREECK 10*/
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#define EN_CKOUT_ARM 11
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/* ARM_IDLECT3 bit shifts */
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#define EN_OCPI_CK 0
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#define EN_TC1_CK 2
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#define EN_TC2_CK 4
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/* DSP_IDLECT2 bit shifts (0,1,2 are same as for ARM_IDLECT2) */
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#define EN_DSPTIMCK 5
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/* Various register defines for clock controls scattered around OMAP chip */
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#define SDW_MCLK_INV_BIT 2 /* In ULPD_CLKC_CTRL */
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#define USB_MCLK_EN_BIT 4 /* In ULPD_CLKC_CTRL */
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#define USB_HOST_HHC_UHOST_EN 9 /* In MOD_CONF_CTRL_0 */
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#define SWD_ULPD_PLL_CLK_REQ 1 /* In SWD_CLK_DIV_CTRL_SEL */
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#define COM_ULPD_PLL_CLK_REQ 1 /* In COM_CLK_DIV_CTRL_SEL */
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#define SWD_CLK_DIV_CTRL_SEL 0xfffe0874
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#define COM_CLK_DIV_CTRL_SEL 0xfffe0878
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#define SOFT_REQ_REG 0xfffe0834
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#define SOFT_REQ_REG2 0xfffe0880
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extern __u32 arm_idlect1_mask;
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extern struct clk *api_ck_p, *ck_dpll1_p, *ck_ref_p;
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extern const struct clkops clkops_dspck;
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extern const struct clkops clkops_dummy;
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extern const struct clkops clkops_uart_16xx;
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extern const struct clkops clkops_generic;
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/* used for passing SoC type to omap1_{select,round_to}_table_rate() */
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extern u32 cpu_mask;
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#endif
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