include/linux/clk/tegra.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
   4  */
   5
   6 #ifndef __LINUX_CLK_TEGRA_H_
   7 #define __LINUX_CLK_TEGRA_H_
   8
   9 #include <linux/types.h>
  10 #include <linux/bug.h>
  11
  12 /*
  13  * Tegra CPU clock and reset control ops
  14  *
  15  * wait_for_reset:
  16  *      keep waiting until the CPU in reset state
  17  * put_in_reset:
  18  *      put the CPU in reset state
  19  * out_of_reset:
  20  *      release the CPU from reset state
  21  * enable_clock:
  22  *      CPU clock un-gate
  23  * disable_clock:
  24  *      CPU clock gate
  25  * rail_off_ready:
  26  *      CPU is ready for rail off
  27  * suspend:
  28  *      save the clock settings when CPU go into low-power state
  29  * resume:
  30  *      restore the clock settings when CPU exit low-power state
  31  */
  32 struct tegra_cpu_car_ops {
  33         void (*wait_for_reset)(u32 cpu);
  34         void (*put_in_reset)(u32 cpu);
  35         void (*out_of_reset)(u32 cpu);
  36         void (*enable_clock)(u32 cpu);
  37         void (*disable_clock)(u32 cpu);
  38 #ifdef CONFIG_PM_SLEEP
  39         bool (*rail_off_ready)(void);
  40         void (*suspend)(void);
  41         void (*resume)(void);
  42 #endif
  43 };
  44
  45 extern struct tegra_cpu_car_ops *tegra_cpu_car_ops;
  46
  47 static inline void tegra_wait_cpu_in_reset(u32 cpu)
  48 {
  49         if (WARN_ON(!tegra_cpu_car_ops->wait_for_reset))
  50                 return;
  51
  52         tegra_cpu_car_ops->wait_for_reset(cpu);
  53 }
  54
  55 static inline void tegra_put_cpu_in_reset(u32 cpu)
  56 {
  57         if (WARN_ON(!tegra_cpu_car_ops->put_in_reset))
  58                 return;
  59
  60         tegra_cpu_car_ops->put_in_reset(cpu);
  61 }
  62
  63 static inline void tegra_cpu_out_of_reset(u32 cpu)
  64 {
  65         if (WARN_ON(!tegra_cpu_car_ops->out_of_reset))
  66                 return;
  67
  68         tegra_cpu_car_ops->out_of_reset(cpu);
  69 }
  70
  71 static inline void tegra_enable_cpu_clock(u32 cpu)
  72 {
  73         if (WARN_ON(!tegra_cpu_car_ops->enable_clock))
  74                 return;
  75
  76         tegra_cpu_car_ops->enable_clock(cpu);
  77 }
  78
  79 static inline void tegra_disable_cpu_clock(u32 cpu)
  80 {
  81         if (WARN_ON(!tegra_cpu_car_ops->disable_clock))
  82                 return;
  83
  84         tegra_cpu_car_ops->disable_clock(cpu);
  85 }
  86
  87 #ifdef CONFIG_PM_SLEEP
  88 static inline bool tegra_cpu_rail_off_ready(void)
  89 {
  90         if (WARN_ON(!tegra_cpu_car_ops->rail_off_ready))
  91                 return false;
  92
  93         return tegra_cpu_car_ops->rail_off_ready();
  94 }
  95
  96 static inline void tegra_cpu_clock_suspend(void)
  97 {
  98         if (WARN_ON(!tegra_cpu_car_ops->suspend))
  99                 return;
 100
 101         tegra_cpu_car_ops->suspend();
 102 }
 103
 104 static inline void tegra_cpu_clock_resume(void)
 105 {
 106         if (WARN_ON(!tegra_cpu_car_ops->resume))
 107                 return;
 108
 109         tegra_cpu_car_ops->resume();
 110 }
 111 #else
 112 static inline bool tegra_cpu_rail_off_ready(void)
 113 {
 114         return false;
 115 }
 116
 117 static inline void tegra_cpu_clock_suspend(void)
 118 {
 119 }
 120
 121 static inline void tegra_cpu_clock_resume(void)
 122 {
 123 }
 124 #endif
 125
 126 extern void tegra210_xusb_pll_hw_control_enable(void);
 127 extern void tegra210_xusb_pll_hw_sequence_start(void);
 128 extern void tegra210_sata_pll_hw_control_enable(void);
 129 extern void tegra210_sata_pll_hw_sequence_start(void);
 130 extern void tegra210_set_sata_pll_seq_sw(bool state);
 131 extern void tegra210_put_utmipll_in_iddq(void);
 132 extern void tegra210_put_utmipll_out_iddq(void);
 133 extern int tegra210_clk_handle_mbist_war(unsigned int id);
 134
 135 struct clk;
 136
 137 typedef long (tegra20_clk_emc_round_cb)(unsigned long rate,
 138                                         unsigned long min_rate,
 139                                         unsigned long max_rate,
 140                                         void *arg);
 141
 142 void tegra20_clk_set_emc_round_callback(tegra20_clk_emc_round_cb *round_cb,
 143                                         void *cb_arg);
 144 int tegra20_clk_prepare_emc_mc_same_freq(struct clk *emc_clk, bool same);
 145
 146 #endif /* __LINUX_CLK_TEGRA_H_ */