include/clk.h

   1 /*
   2  * Copyright (c) 2015 Google, Inc
   3  * Written by Simon Glass <sjg@chromium.org>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #ifndef _CLK_H_
   9 #define _CLK_H_
  10
  11 int soc_clk_dump(void);
  12
  13 struct clk_ops {
  14         /**
  15          * get_rate() - Get current clock rate
  16          *
  17          * @dev:        Device to check (UCLASS_CLK)
  18          * @return clock rate in Hz, or -ve error code
  19          */
  20         ulong (*get_rate)(struct udevice *dev);
  21
  22         /**
  23          * set_rate() - Set current clock rate
  24          *
  25          * @dev:        Device to adjust
  26          * @rate:       New clock rate in Hz
  27          * @return new rate, or -ve error code
  28          */
  29         ulong (*set_rate)(struct udevice *dev, ulong rate);
  30
  31         /**
  32         * clk_set_periph_rate() - Set clock rate for a peripheral
  33         *
  34         * @dev: Device to adjust (UCLASS_CLK)
  35         * @rate:        New clock rate in Hz
  36         * @return new clock rate in Hz, or -ve error code
  37         */
  38         ulong (*get_periph_rate)(struct udevice *dev, int periph);
  39
  40         /**
  41          * clk_set_periph_rate() - Set current clock rate for a peripheral
  42          *
  43          * @dev:        Device to update (UCLASS_CLK)
  44          * @periph:     Peripheral ID to cupdate
  45          * @return new clock rate in Hz, or -ve error code
  46          */
  47         ulong (*set_periph_rate)(struct udevice *dev, int periph, ulong rate);
  48 };
  49
  50 #define clk_get_ops(dev)        ((struct clk_ops *)(dev)->driver->ops)
  51
  52 /**
  53  * clk_get_rate() - Get current clock rate
  54  *
  55  * @dev:        Device to check (UCLASS_CLK)
  56  * @return clock rate in Hz, or -ve error code
  57  */
  58 ulong clk_get_rate(struct udevice *dev);
  59
  60 /**
  61  * set_rate() - Set current clock rate
  62  *
  63  * @dev:        Device to adjust
  64  * @rate:       New clock rate in Hz
  65  * @return new rate, or -ve error code
  66  */
  67 ulong clk_set_rate(struct udevice *dev, ulong rate);
  68
  69 /**
  70  * clk_get_periph_rate() - Get current clock rate for a peripheral
  71  *
  72  * @dev:        Device to check (UCLASS_CLK)
  73  * @return clock rate in Hz, -ve error code
  74  */
  75 ulong clk_get_periph_rate(struct udevice *dev, int periph);
  76
  77 /**
  78  * clk_set_periph_rate() - Set current clock rate for a peripheral
  79  *
  80  * @dev:        Device to update (UCLASS_CLK)
  81  * @periph:     Peripheral ID to cupdate
  82  * @return new clock rate in Hz, or -ve error code
  83  */
  84 ulong clk_set_periph_rate(struct udevice *dev, int periph, ulong rate);
  85
  86 #endif /* _CLK_H_ */