include/linux/clk/tegra.h

   1 /*
   2  * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #ifndef __LINUX_CLK_TEGRA_H_
  18 #define __LINUX_CLK_TEGRA_H_
  19
  20 #include <linux/types.h>
  21 #include <linux/bug.h>
  22
  23 /*
  24  * Tegra CPU clock and reset control ops
  25  *
  26  * wait_for_reset:
  27  *      keep waiting until the CPU in reset state
  28  * put_in_reset:
  29  *      put the CPU in reset state
  30  * out_of_reset:
  31  *      release the CPU from reset state
  32  * enable_clock:
  33  *      CPU clock un-gate
  34  * disable_clock:
  35  *      CPU clock gate
  36  * rail_off_ready:
  37  *      CPU is ready for rail off
  38  * suspend:
  39  *      save the clock settings when CPU go into low-power state
  40  * resume:
  41  *      restore the clock settings when CPU exit low-power state
  42  */
  43 struct tegra_cpu_car_ops {
  44         void (*wait_for_reset)(u32 cpu);
  45         void (*put_in_reset)(u32 cpu);
  46         void (*out_of_reset)(u32 cpu);
  47         void (*enable_clock)(u32 cpu);
  48         void (*disable_clock)(u32 cpu);
  49 #ifdef CONFIG_PM_SLEEP
  50         bool (*rail_off_ready)(void);
  51         void (*suspend)(void);
  52         void (*resume)(void);
  53 #endif
  54 };
  55
  56 extern struct tegra_cpu_car_ops *tegra_cpu_car_ops;
  57
  58 static inline void tegra_wait_cpu_in_reset(u32 cpu)
  59 {
  60         if (WARN_ON(!tegra_cpu_car_ops->wait_for_reset))
  61                 return;
  62
  63         tegra_cpu_car_ops->wait_for_reset(cpu);
  64 }
  65
  66 static inline void tegra_put_cpu_in_reset(u32 cpu)
  67 {
  68         if (WARN_ON(!tegra_cpu_car_ops->put_in_reset))
  69                 return;
  70
  71         tegra_cpu_car_ops->put_in_reset(cpu);
  72 }
  73
  74 static inline void tegra_cpu_out_of_reset(u32 cpu)
  75 {
  76         if (WARN_ON(!tegra_cpu_car_ops->out_of_reset))
  77                 return;
  78
  79         tegra_cpu_car_ops->out_of_reset(cpu);
  80 }
  81
  82 static inline void tegra_enable_cpu_clock(u32 cpu)
  83 {
  84         if (WARN_ON(!tegra_cpu_car_ops->enable_clock))
  85                 return;
  86
  87         tegra_cpu_car_ops->enable_clock(cpu);
  88 }
  89
  90 static inline void tegra_disable_cpu_clock(u32 cpu)
  91 {
  92         if (WARN_ON(!tegra_cpu_car_ops->disable_clock))
  93                 return;
  94
  95         tegra_cpu_car_ops->disable_clock(cpu);
  96 }
  97
  98 #ifdef CONFIG_PM_SLEEP
  99 static inline bool tegra_cpu_rail_off_ready(void)
 100 {
 101         if (WARN_ON(!tegra_cpu_car_ops->rail_off_ready))
 102                 return false;
 103
 104         return tegra_cpu_car_ops->rail_off_ready();
 105 }
 106
 107 static inline void tegra_cpu_clock_suspend(void)
 108 {
 109         if (WARN_ON(!tegra_cpu_car_ops->suspend))
 110                 return;
 111
 112         tegra_cpu_car_ops->suspend();
 113 }
 114
 115 static inline void tegra_cpu_clock_resume(void)
 116 {
 117         if (WARN_ON(!tegra_cpu_car_ops->resume))
 118                 return;
 119
 120         tegra_cpu_car_ops->resume();
 121 }
 122 #endif
 123
 124 extern void tegra210_xusb_pll_hw_control_enable(void);
 125 extern void tegra210_xusb_pll_hw_sequence_start(void);
 126 extern void tegra210_sata_pll_hw_control_enable(void);
 127 extern void tegra210_sata_pll_hw_sequence_start(void);
 128 extern void tegra210_set_sata_pll_seq_sw(bool state);
 129 extern void tegra210_put_utmipll_in_iddq(void);
 130 extern void tegra210_put_utmipll_out_iddq(void);
 131
 132 #endif /* __LINUX_CLK_TEGRA_H_ */