arch/arm/mach-omap2/clock.h

   1 /*
   2  *  linux/arch/arm/mach-omap2/clock.h
   3  *
   4  *  Copyright (C) 2005-2009 Texas Instruments, Inc.
   5  *  Copyright (C) 2004-2011 Nokia Corporation
   6  *
   7  *  Contacts:
   8  *  Richard Woodruff <r-woodruff2@ti.com>
   9  *  Paul Walmsley
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #ifndef __ARCH_ARM_MACH_OMAP2_CLOCK_H
  17 #define __ARCH_ARM_MACH_OMAP2_CLOCK_H
  18
  19 #include <linux/kernel.h>
  20
  21 #include <plat/clock.h>
  22
  23 /* CM_CLKSEL2_PLL.CORE_CLK_SRC bits (2XXX) */
  24 #define CORE_CLK_SRC_32K                0x0
  25 #define CORE_CLK_SRC_DPLL               0x1
  26 #define CORE_CLK_SRC_DPLL_X2            0x2
  27
  28 /* OMAP2xxx CM_CLKEN_PLL.EN_DPLL bits - for omap2_get_dpll_rate() */
  29 #define OMAP2XXX_EN_DPLL_LPBYPASS               0x1
  30 #define OMAP2XXX_EN_DPLL_FRBYPASS               0x2
  31 #define OMAP2XXX_EN_DPLL_LOCKED                 0x3
  32
  33 /* OMAP3xxx CM_CLKEN_PLL*.EN_*_DPLL bits - for omap2_get_dpll_rate() */
  34 #define OMAP3XXX_EN_DPLL_LPBYPASS               0x5
  35 #define OMAP3XXX_EN_DPLL_FRBYPASS               0x6
  36 #define OMAP3XXX_EN_DPLL_LOCKED                 0x7
  37
  38 /* OMAP4xxx CM_CLKMODE_DPLL*.EN_*_DPLL bits - for omap2_get_dpll_rate() */
  39 #define OMAP4XXX_EN_DPLL_MNBYPASS               0x4
  40 #define OMAP4XXX_EN_DPLL_LPBYPASS               0x5
  41 #define OMAP4XXX_EN_DPLL_FRBYPASS               0x6
  42 #define OMAP4XXX_EN_DPLL_LOCKED                 0x7
  43
  44 /* CM_CLKEN_PLL*.EN* bit values - not all are available for every DPLL */
  45 #define DPLL_LOW_POWER_STOP     0x1
  46 #define DPLL_LOW_POWER_BYPASS   0x5
  47 #define DPLL_LOCKED             0x7
  48
  49 /* DPLL Type and DCO Selection Flags */
  50 #define DPLL_J_TYPE             0x1
  51
  52 int omap2_clk_enable(struct clk *clk);
  53 void omap2_clk_disable(struct clk *clk);
  54 long omap2_clk_round_rate(struct clk *clk, unsigned long rate);
  55 int omap2_clk_set_rate(struct clk *clk, unsigned long rate);
  56 int omap2_clk_set_parent(struct clk *clk, struct clk *new_parent);
  57 long omap2_dpll_round_rate(struct clk *clk, unsigned long target_rate);
  58 unsigned long omap3_dpll_recalc(struct clk *clk);
  59 unsigned long omap3_clkoutx2_recalc(struct clk *clk);
  60 void omap3_dpll_allow_idle(struct clk *clk);
  61 void omap3_dpll_deny_idle(struct clk *clk);
  62 u32 omap3_dpll_autoidle_read(struct clk *clk);
  63 int omap3_noncore_dpll_set_rate(struct clk *clk, unsigned long rate);
  64 int omap3_noncore_dpll_enable(struct clk *clk);
  65 void omap3_noncore_dpll_disable(struct clk *clk);
  66 int omap4_dpllmx_gatectrl_read(struct clk *clk);
  67 void omap4_dpllmx_allow_gatectrl(struct clk *clk);
  68 void omap4_dpllmx_deny_gatectrl(struct clk *clk);
  69 long omap4_dpll_regm4xen_round_rate(struct clk *clk, unsigned long target_rate);
  70 unsigned long omap4_dpll_regm4xen_recalc(struct clk *clk);
  71
  72 #ifdef CONFIG_OMAP_RESET_CLOCKS
  73 void omap2_clk_disable_unused(struct clk *clk);
  74 #else
  75 #define omap2_clk_disable_unused        NULL
  76 #endif
  77
  78 void omap2_init_clk_clkdm(struct clk *clk);
  79 void __init omap2_clk_disable_clkdm_control(void);
  80
  81 /* clkt_clksel.c public functions */
  82 u32 omap2_clksel_round_rate_div(struct clk *clk, unsigned long target_rate,
  83                                 u32 *new_div);
  84 void omap2_init_clksel_parent(struct clk *clk);
  85 unsigned long omap2_clksel_recalc(struct clk *clk);
  86 long omap2_clksel_round_rate(struct clk *clk, unsigned long target_rate);
  87 int omap2_clksel_set_rate(struct clk *clk, unsigned long rate);
  88 int omap2_clksel_set_parent(struct clk *clk, struct clk *new_parent);
  89
  90 /* clkt_iclk.c public functions */
  91 extern void omap2_clkt_iclk_allow_idle(struct clk *clk);
  92 extern void omap2_clkt_iclk_deny_idle(struct clk *clk);
  93
  94 u32 omap2_get_dpll_rate(struct clk *clk);
  95 void omap2_init_dpll_parent(struct clk *clk);
  96
  97 int omap2_wait_clock_ready(void __iomem *reg, u32 cval, const char *name);
  98
  99
 100 #ifdef CONFIG_ARCH_OMAP2
 101 void omap2xxx_clk_prepare_for_reboot(void);
 102 #else
 103 static inline void omap2xxx_clk_prepare_for_reboot(void)
 104 {
 105 }
 106 #endif
 107
 108 #ifdef CONFIG_ARCH_OMAP3
 109 void omap3_clk_prepare_for_reboot(void);
 110 #else
 111 static inline void omap3_clk_prepare_for_reboot(void)
 112 {
 113 }
 114 #endif
 115
 116 #ifdef CONFIG_ARCH_OMAP4
 117 void omap4_clk_prepare_for_reboot(void);
 118 #else
 119 static inline void omap4_clk_prepare_for_reboot(void)
 120 {
 121 }
 122 #endif
 123
 124 int omap2_dflt_clk_enable(struct clk *clk);
 125 void omap2_dflt_clk_disable(struct clk *clk);
 126 void omap2_clk_dflt_find_companion(struct clk *clk, void __iomem **other_reg,
 127                                    u8 *other_bit);
 128 void omap2_clk_dflt_find_idlest(struct clk *clk, void __iomem **idlest_reg,
 129                                 u8 *idlest_bit, u8 *idlest_val);
 130 int omap2_clk_switch_mpurate_at_boot(const char *mpurate_ck_name);
 131 void omap2_clk_print_new_rates(const char *hfclkin_ck_name,
 132                                const char *core_ck_name,
 133                                const char *mpu_ck_name);
 134
 135 extern u16 cpu_mask;
 136
 137 extern const struct clkops clkops_omap2_dflt_wait;
 138 extern const struct clkops clkops_dummy;
 139 extern const struct clkops clkops_omap2_dflt;
 140
 141 extern struct clk_functions omap2_clk_functions;
 142 extern struct clk *vclk, *sclk;
 143
 144 extern const struct clksel_rate gpt_32k_rates[];
 145 extern const struct clksel_rate gpt_sys_rates[];
 146 extern const struct clksel_rate gfx_l3_rates[];
 147 extern const struct clksel_rate dsp_ick_rates[];
 148
 149 #if defined(CONFIG_ARCH_OMAP2) && defined(CONFIG_CPU_FREQ)
 150 extern void omap2_clk_init_cpufreq_table(struct cpufreq_frequency_table **table);
 151 extern void omap2_clk_exit_cpufreq_table(struct cpufreq_frequency_table **table);
 152 #else
 153 #define omap2_clk_init_cpufreq_table    0
 154 #define omap2_clk_exit_cpufreq_table    0
 155 #endif
 156
 157 extern const struct clkops clkops_omap2_iclk_dflt_wait;
 158 extern const struct clkops clkops_omap2_iclk_dflt;
 159 extern const struct clkops clkops_omap2_iclk_idle_only;
 160 extern const struct clkops clkops_omap2_mdmclk_dflt_wait;
 161 extern const struct clkops clkops_omap2xxx_dpll_ops;
 162 extern const struct clkops clkops_omap3_noncore_dpll_ops;
 163 extern const struct clkops clkops_omap3_core_dpll_ops;
 164 extern const struct clkops clkops_omap4_dpllmx_ops;
 165
 166 #endif