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 <plat/clock.h>
  20
  21 /* CM_CLKSEL2_PLL.CORE_CLK_SRC bits (2XXX) */
  22 #define CORE_CLK_SRC_32K                0x0
  23 #define CORE_CLK_SRC_DPLL               0x1
  24 #define CORE_CLK_SRC_DPLL_X2            0x2
  25
  26 /* OMAP2xxx CM_CLKEN_PLL.EN_DPLL bits - for omap2_get_dpll_rate() */
  27 #define OMAP2XXX_EN_DPLL_LPBYPASS               0x1
  28 #define OMAP2XXX_EN_DPLL_FRBYPASS               0x2
  29 #define OMAP2XXX_EN_DPLL_LOCKED                 0x3
  30
  31 /* OMAP3xxx CM_CLKEN_PLL*.EN_*_DPLL bits - for omap2_get_dpll_rate() */
  32 #define OMAP3XXX_EN_DPLL_LPBYPASS               0x5
  33 #define OMAP3XXX_EN_DPLL_FRBYPASS               0x6
  34 #define OMAP3XXX_EN_DPLL_LOCKED                 0x7
  35
  36 /* OMAP4xxx CM_CLKMODE_DPLL*.EN_*_DPLL bits - for omap2_get_dpll_rate() */
  37 #define OMAP4XXX_EN_DPLL_MNBYPASS               0x4
  38 #define OMAP4XXX_EN_DPLL_LPBYPASS               0x5
  39 #define OMAP4XXX_EN_DPLL_FRBYPASS               0x6
  40 #define OMAP4XXX_EN_DPLL_LOCKED                 0x7
  41
  42 /* CM_CLKEN_PLL*.EN* bit values - not all are available for every DPLL */
  43 #define DPLL_LOW_POWER_STOP     0x1
  44 #define DPLL_LOW_POWER_BYPASS   0x5
  45 #define DPLL_LOCKED             0x7
  46
  47 /* DPLL Type and DCO Selection Flags */
  48 #define DPLL_J_TYPE             0x1
  49
  50 int omap2_clk_enable(struct clk *clk);
  51 void omap2_clk_disable(struct clk *clk);
  52 long omap2_clk_round_rate(struct clk *clk, unsigned long rate);
  53 int omap2_clk_set_rate(struct clk *clk, unsigned long rate);
  54 int omap2_clk_set_parent(struct clk *clk, struct clk *new_parent);
  55 long omap2_dpll_round_rate(struct clk *clk, unsigned long target_rate);
  56 unsigned long omap3_dpll_recalc(struct clk *clk);
  57 unsigned long omap3_clkoutx2_recalc(struct clk *clk);
  58 void omap3_dpll_allow_idle(struct clk *clk);
  59 void omap3_dpll_deny_idle(struct clk *clk);
  60 u32 omap3_dpll_autoidle_read(struct clk *clk);
  61 int omap3_noncore_dpll_set_rate(struct clk *clk, unsigned long rate);
  62 int omap3_noncore_dpll_enable(struct clk *clk);
  63 void omap3_noncore_dpll_disable(struct clk *clk);
  64 int omap4_dpllmx_gatectrl_read(struct clk *clk);
  65 void omap4_dpllmx_allow_gatectrl(struct clk *clk);
  66 void omap4_dpllmx_deny_gatectrl(struct clk *clk);
  67
  68 #ifdef CONFIG_OMAP_RESET_CLOCKS
  69 void omap2_clk_disable_unused(struct clk *clk);
  70 #else
  71 #define omap2_clk_disable_unused        NULL
  72 #endif
  73
  74 void omap2_init_clk_clkdm(struct clk *clk);
  75
  76 /* clkt_clksel.c public functions */
  77 u32 omap2_clksel_round_rate_div(struct clk *clk, unsigned long target_rate,
  78                                 u32 *new_div);
  79 void omap2_init_clksel_parent(struct clk *clk);
  80 unsigned long omap2_clksel_recalc(struct clk *clk);
  81 long omap2_clksel_round_rate(struct clk *clk, unsigned long target_rate);
  82 int omap2_clksel_set_rate(struct clk *clk, unsigned long rate);
  83 int omap2_clksel_set_parent(struct clk *clk, struct clk *new_parent);
  84
  85 /* clkt_iclk.c public functions */
  86 extern void omap2_clkt_iclk_allow_idle(struct clk *clk);
  87 extern void omap2_clkt_iclk_deny_idle(struct clk *clk);
  88
  89 u32 omap2_get_dpll_rate(struct clk *clk);
  90 void omap2_init_dpll_parent(struct clk *clk);
  91
  92 int omap2_wait_clock_ready(void __iomem *reg, u32 cval, const char *name);
  93
  94
  95 #ifdef CONFIG_ARCH_OMAP2
  96 void omap2xxx_clk_prepare_for_reboot(void);
  97 #else
  98 static inline void omap2xxx_clk_prepare_for_reboot(void)
  99 {
 100 }
 101 #endif
 102
 103 #ifdef CONFIG_ARCH_OMAP3
 104 void omap3_clk_prepare_for_reboot(void);
 105 #else
 106 static inline void omap3_clk_prepare_for_reboot(void)
 107 {
 108 }
 109 #endif
 110
 111 #ifdef CONFIG_ARCH_OMAP4
 112 void omap4_clk_prepare_for_reboot(void);
 113 #else
 114 static inline void omap4_clk_prepare_for_reboot(void)
 115 {
 116 }
 117 #endif
 118
 119 int omap2_dflt_clk_enable(struct clk *clk);
 120 void omap2_dflt_clk_disable(struct clk *clk);
 121 void omap2_clk_dflt_find_companion(struct clk *clk, void __iomem **other_reg,
 122                                    u8 *other_bit);
 123 void omap2_clk_dflt_find_idlest(struct clk *clk, void __iomem **idlest_reg,
 124                                 u8 *idlest_bit, u8 *idlest_val);
 125 int omap2_clk_switch_mpurate_at_boot(const char *mpurate_ck_name);
 126 void omap2_clk_print_new_rates(const char *hfclkin_ck_name,
 127                                const char *core_ck_name,
 128                                const char *mpu_ck_name);
 129
 130 extern u8 cpu_mask;
 131
 132 extern const struct clkops clkops_omap2_dflt_wait;
 133 extern const struct clkops clkops_dummy;
 134 extern const struct clkops clkops_omap2_dflt;
 135
 136 extern struct clk_functions omap2_clk_functions;
 137 extern struct clk *vclk, *sclk;
 138
 139 extern const struct clksel_rate gpt_32k_rates[];
 140 extern const struct clksel_rate gpt_sys_rates[];
 141 extern const struct clksel_rate gfx_l3_rates[];
 142 extern const struct clksel_rate dsp_ick_rates[];
 143
 144 #if defined(CONFIG_ARCH_OMAP2) && defined(CONFIG_CPU_FREQ)
 145 extern void omap2_clk_init_cpufreq_table(struct cpufreq_frequency_table **table);
 146 extern void omap2_clk_exit_cpufreq_table(struct cpufreq_frequency_table **table);
 147 #else
 148 #define omap2_clk_init_cpufreq_table    0
 149 #define omap2_clk_exit_cpufreq_table    0
 150 #endif
 151
 152 extern const struct clkops clkops_omap2_iclk_dflt_wait;
 153 extern const struct clkops clkops_omap2_iclk_dflt;
 154 extern const struct clkops clkops_omap2_iclk_idle_only;
 155 extern const struct clkops clkops_omap2_mdmclk_dflt_wait;
 156 extern const struct clkops clkops_omap2xxx_dpll_ops;
 157 extern const struct clkops clkops_omap3_noncore_dpll_ops;
 158 extern const struct clkops clkops_omap3_core_dpll_ops;
 159 extern const struct clkops clkops_omap4_dpllmx_ops;
 160
 161 #endif