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_MN_BYPASS          0x4
  45 #define DPLL_LOW_POWER_BYPASS   0x5
  46 #define DPLL_LOCKED             0x7
  47
  48 /* DPLL Type and DCO Selection Flags */
  49 #define DPLL_J_TYPE             0x1
  50
  51 int omap2_clk_enable(struct clk *clk);
  52 void omap2_clk_disable(struct clk *clk);
  53 long omap2_clk_round_rate(struct clk *clk, unsigned long rate);
  54 int omap2_clk_set_rate(struct clk *clk, unsigned long rate);
  55 int omap2_clk_set_parent(struct clk *clk, struct clk *new_parent);
  56 long omap2_dpll_round_rate(struct clk *clk, unsigned long target_rate);
  57 unsigned long omap3_dpll_recalc(struct clk *clk);
  58 unsigned long omap3_clkoutx2_recalc(struct clk *clk);
  59 void omap3_dpll_allow_idle(struct clk *clk);
  60 void omap3_dpll_deny_idle(struct clk *clk);
  61 u32 omap3_dpll_autoidle_read(struct clk *clk);
  62 int omap3_noncore_dpll_set_rate(struct clk *clk, unsigned long rate);
  63 int omap3_noncore_dpll_enable(struct clk *clk);
  64 void omap3_noncore_dpll_disable(struct clk *clk);
  65 int omap4_dpllmx_gatectrl_read(struct clk *clk);
  66 void omap4_dpllmx_allow_gatectrl(struct clk *clk);
  67 void omap4_dpllmx_deny_gatectrl(struct clk *clk);
  68 int omap4460_mpu_dpll_set_rate(struct clk *clk, unsigned long rate);
  69 long omap4460_mpu_dpll_round_rate(struct clk *clk, unsigned long rate);
  70 unsigned long omap4460_mpu_dpll_recalc(struct clk *clk);
  71 long omap4_dpll_regm4xen_round_rate(struct clk *clk, unsigned long target_rate);
  72 unsigned long omap4_dpll_regm4xen_recalc(struct clk *clk);
  73
  74 #ifdef CONFIG_OMAP_RESET_CLOCKS
  75 void omap2_clk_disable_unused(struct clk *clk);
  76 #else
  77 #define omap2_clk_disable_unused        NULL
  78 #endif
  79
  80 void omap2_init_clk_clkdm(struct clk *clk);
  81
  82 /* clkt_clksel.c public functions */
  83 u32 omap2_clksel_round_rate_div(struct clk *clk, unsigned long target_rate,
  84                                 u32 *new_div);
  85 void omap2_init_clksel_parent(struct clk *clk);
  86 unsigned long omap2_clksel_recalc(struct clk *clk);
  87 long omap2_clksel_round_rate(struct clk *clk, unsigned long target_rate);
  88 int omap2_clksel_set_rate(struct clk *clk, unsigned long rate);
  89 int omap2_clksel_set_parent(struct clk *clk, struct clk *new_parent);
  90
  91 /* clkt_iclk.c public functions */
  92 extern void omap2_clkt_iclk_allow_idle(struct clk *clk);
  93 extern void omap2_clkt_iclk_deny_idle(struct clk *clk);
  94
  95 u32 omap2_get_dpll_rate(struct clk *clk);
  96 void omap2_init_dpll_parent(struct clk *clk);
  97
  98 int omap2_wait_clock_ready(void __iomem *reg, u32 cval, const char *name);
  99
 100
 101 #ifdef CONFIG_ARCH_OMAP2
 102 void omap2xxx_clk_prepare_for_reboot(void);
 103 #else
 104 static inline void omap2xxx_clk_prepare_for_reboot(void)
 105 {
 106 }
 107 #endif
 108
 109 #ifdef CONFIG_ARCH_OMAP3
 110 void omap3_clk_prepare_for_reboot(void);
 111 #else
 112 static inline void omap3_clk_prepare_for_reboot(void)
 113 {
 114 }
 115 #endif
 116
 117 #ifdef CONFIG_ARCH_OMAP4
 118 void omap4_clk_prepare_for_reboot(void);
 119 #else
 120 static inline void omap4_clk_prepare_for_reboot(void)
 121 {
 122 }
 123 #endif
 124
 125 int omap2_dflt_clk_enable(struct clk *clk);
 126 void omap2_dflt_clk_disable(struct clk *clk);
 127 void omap2_clk_dflt_find_companion(struct clk *clk, void __iomem **other_reg,
 128                                    u8 *other_bit);
 129 void omap2_clk_dflt_find_idlest(struct clk *clk, void __iomem **idlest_reg,
 130                                 u8 *idlest_bit, u8 *idlest_val);
 131 int omap2_clk_switch_mpurate_at_boot(const char *mpurate_ck_name);
 132 void omap2_clk_print_new_rates(const char *hfclkin_ck_name,
 133                                const char *core_ck_name,
 134                                const char *mpu_ck_name);
 135
 136 extern u8 cpu_mask;
 137
 138 extern const struct clkops clkops_omap2_dflt_wait;
 139 extern const struct clkops clkops_dummy;
 140 extern const struct clkops clkops_omap2_dflt;
 141 extern const struct clkops clkops_omap4_dflt_wait;
 142
 143 extern struct clk_functions omap2_clk_functions;
 144 extern struct clk *vclk, *sclk;
 145
 146 extern const struct clksel_rate gpt_32k_rates[];
 147 extern const struct clksel_rate gpt_sys_rates[];
 148 extern const struct clksel_rate gfx_l3_rates[];
 149 extern const struct clksel_rate dsp_ick_rates[];
 150
 151 #ifdef CONFIG_CPU_FREQ
 152
 153 #ifdef CONFIG_ARCH_OMAP2
 154 extern void omap2_clk_init_cpufreq_table(struct cpufreq_frequency_table **table);
 155 extern void omap2_clk_exit_cpufreq_table(struct cpufreq_frequency_table **table);
 156 #else
 157 #define omap2_clk_init_cpufreq_table    0
 158 #define omap2_clk_exit_cpufreq_table    0
 159 #endif
 160
 161 #ifdef CONFIG_ARCH_OMAP3
 162 extern void omap3_clk_init_cpufreq_table(struct cpufreq_frequency_table **table);
 163 extern void omap3_clk_exit_cpufreq_table(struct cpufreq_frequency_table **table);
 164 #else
 165 #define omap3_clk_init_cpufreq_table    0
 166 #define omap3_clk_exit_cpufreq_table    0
 167 #endif
 168
 169 #endif /* CONFIG_CPU_FREQ */
 170
 171 extern const struct clkops clkops_omap2_iclk_dflt_wait;
 172 extern const struct clkops clkops_omap2_iclk_dflt;
 173 extern const struct clkops clkops_omap2_iclk_idle_only;
 174 extern const struct clkops clkops_omap2_mdmclk_dflt_wait;
 175 extern const struct clkops clkops_omap2xxx_dpll_ops;
 176 extern const struct clkops clkops_omap3_noncore_dpll_ops;
 177 extern const struct clkops clkops_omap3_core_dpll_ops;
 178 extern const struct clkops clkops_omap4_dpllmx_ops;
 179
 180 #endif