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435699db6a
This patch cleans up arch/arm/mach-omap2/clkt_clksel.c. It: - makes several functions static that are not called outside the file; - adds documentation; - makes some code paths easier to read (hopefully), by breaking up compound statements and removing redundant checks; - converts some pr_err()s that indicate clock tree data problems into WARN()s, so they are more likely to be noticed; - and moves omap2_clk_round_rate() back into mach-omap2/clock.c, its proper home, since it is not clksel-specific. Signed-off-by: Paul Walmsley <paul@pwsan.com>
152 lines
4.8 KiB
C
152 lines
4.8 KiB
C
/*
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* linux/arch/arm/mach-omap2/clock.h
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*
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* Copyright (C) 2005-2009 Texas Instruments, Inc.
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* Copyright (C) 2004-2009 Nokia Corporation
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*
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* Contacts:
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* Richard Woodruff <r-woodruff2@ti.com>
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* Paul Walmsley
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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_OMAP2_CLOCK_H
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#define __ARCH_ARM_MACH_OMAP2_CLOCK_H
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#include <plat/clock.h>
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/* The maximum error between a target DPLL rate and the rounded rate in Hz */
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#define DEFAULT_DPLL_RATE_TOLERANCE 50000
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/* CM_CLKSEL2_PLL.CORE_CLK_SRC bits (2XXX) */
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#define CORE_CLK_SRC_32K 0x0
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#define CORE_CLK_SRC_DPLL 0x1
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#define CORE_CLK_SRC_DPLL_X2 0x2
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/* OMAP2xxx CM_CLKEN_PLL.EN_DPLL bits - for omap2_get_dpll_rate() */
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#define OMAP2XXX_EN_DPLL_LPBYPASS 0x1
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#define OMAP2XXX_EN_DPLL_FRBYPASS 0x2
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#define OMAP2XXX_EN_DPLL_LOCKED 0x3
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/* OMAP3xxx CM_CLKEN_PLL*.EN_*_DPLL bits - for omap2_get_dpll_rate() */
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#define OMAP3XXX_EN_DPLL_LPBYPASS 0x5
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#define OMAP3XXX_EN_DPLL_FRBYPASS 0x6
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#define OMAP3XXX_EN_DPLL_LOCKED 0x7
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/* OMAP4xxx CM_CLKMODE_DPLL*.EN_*_DPLL bits - for omap2_get_dpll_rate() */
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#define OMAP4XXX_EN_DPLL_MNBYPASS 0x4
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#define OMAP4XXX_EN_DPLL_LPBYPASS 0x5
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#define OMAP4XXX_EN_DPLL_FRBYPASS 0x6
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#define OMAP4XXX_EN_DPLL_LOCKED 0x7
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/* CM_CLKEN_PLL*.EN* bit values - not all are available for every DPLL */
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#define DPLL_LOW_POWER_STOP 0x1
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#define DPLL_LOW_POWER_BYPASS 0x5
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#define DPLL_LOCKED 0x7
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/* DPLL Type and DCO Selection Flags */
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#define DPLL_J_TYPE 0x1
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#define DPLL_NO_DCO_SEL 0x2
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int omap2_clk_enable(struct clk *clk);
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void omap2_clk_disable(struct clk *clk);
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long omap2_clk_round_rate(struct clk *clk, unsigned long rate);
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int omap2_clk_set_rate(struct clk *clk, unsigned long rate);
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int omap2_clk_set_parent(struct clk *clk, struct clk *new_parent);
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int omap2_dpll_set_rate_tolerance(struct clk *clk, unsigned int tolerance);
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long omap2_dpll_round_rate(struct clk *clk, unsigned long target_rate);
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unsigned long omap3_dpll_recalc(struct clk *clk);
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unsigned long omap3_clkoutx2_recalc(struct clk *clk);
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void omap3_dpll_allow_idle(struct clk *clk);
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void omap3_dpll_deny_idle(struct clk *clk);
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u32 omap3_dpll_autoidle_read(struct clk *clk);
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int omap3_noncore_dpll_set_rate(struct clk *clk, unsigned long rate);
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int omap3_noncore_dpll_enable(struct clk *clk);
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void omap3_noncore_dpll_disable(struct clk *clk);
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#ifdef CONFIG_OMAP_RESET_CLOCKS
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void omap2_clk_disable_unused(struct clk *clk);
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#else
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#define omap2_clk_disable_unused NULL
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#endif
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void omap2_init_clk_clkdm(struct clk *clk);
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/* clkt_clksel.c public functions */
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u32 omap2_clksel_round_rate_div(struct clk *clk, unsigned long target_rate,
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u32 *new_div);
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void omap2_init_clksel_parent(struct clk *clk);
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unsigned long omap2_clksel_recalc(struct clk *clk);
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long omap2_clksel_round_rate(struct clk *clk, unsigned long target_rate);
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int omap2_clksel_set_rate(struct clk *clk, unsigned long rate);
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int omap2_clksel_set_parent(struct clk *clk, struct clk *new_parent);
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u32 omap2_get_dpll_rate(struct clk *clk);
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void omap2_init_dpll_parent(struct clk *clk);
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int omap2_wait_clock_ready(void __iomem *reg, u32 cval, const char *name);
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#ifdef CONFIG_ARCH_OMAP2
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void omap2xxx_clk_prepare_for_reboot(void);
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#else
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static inline void omap2xxx_clk_prepare_for_reboot(void)
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{
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}
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#endif
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#ifdef CONFIG_ARCH_OMAP3
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void omap3_clk_prepare_for_reboot(void);
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#else
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static inline void omap3_clk_prepare_for_reboot(void)
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{
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}
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#endif
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#ifdef CONFIG_ARCH_OMAP4
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void omap4_clk_prepare_for_reboot(void);
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#else
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static inline void omap4_clk_prepare_for_reboot(void)
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{
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}
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#endif
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int omap2_dflt_clk_enable(struct clk *clk);
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void omap2_dflt_clk_disable(struct clk *clk);
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void omap2_clk_dflt_find_companion(struct clk *clk, void __iomem **other_reg,
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u8 *other_bit);
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void omap2_clk_dflt_find_idlest(struct clk *clk, void __iomem **idlest_reg,
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u8 *idlest_bit, u8 *idlest_val);
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int omap2_clk_switch_mpurate_at_boot(const char *mpurate_ck_name);
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void omap2_clk_print_new_rates(const char *hfclkin_ck_name,
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const char *core_ck_name,
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const char *mpu_ck_name);
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extern u8 cpu_mask;
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extern const struct clkops clkops_omap2_dflt_wait;
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extern const struct clkops clkops_dummy;
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extern const struct clkops clkops_omap2_dflt;
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extern struct clk_functions omap2_clk_functions;
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extern struct clk *vclk, *sclk;
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extern const struct clksel_rate gpt_32k_rates[];
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extern const struct clksel_rate gpt_sys_rates[];
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extern const struct clksel_rate gfx_l3_rates[];
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#if defined(CONFIG_ARCH_OMAP2) && defined(CONFIG_CPU_FREQ)
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extern void omap2_clk_init_cpufreq_table(struct cpufreq_frequency_table **table);
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extern void omap2_clk_exit_cpufreq_table(struct cpufreq_frequency_table **table);
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#else
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#define omap2_clk_init_cpufreq_table 0
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#define omap2_clk_exit_cpufreq_table 0
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#endif
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extern const struct clkops clkops_omap3_noncore_dpll_ops;
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#endif
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