include/hw/misc/imx_ccm.h

   1 /*
   2  * IMX Clock Control Module base class
   3  *
   4  * Copyright (C) 2012 NICTA
   5  * Updated by Jean-Christophe Dubois <jcd@tribudubois.net>
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   8  * See the COPYING file in the top-level directory.
   9  */
  10
  11 #ifndef IMX_CCM_H
  12 #define IMX_CCM_H
  13
  14 #include "hw/sysbus.h"
  15
  16 #define CKIL_FREQ 32768 /* nominal 32khz clock */
  17
  18 /* PLL control registers */
  19 #define PD(v) (((v) >> 26) & 0xf)
  20 #define MFD(v) (((v) >> 16) & 0x3ff)
  21 #define MFI(v) (((v) >> 10) & 0xf);
  22 #define MFN(v) ((v) & 0x3ff)
  23
  24 #define PLL_PD(x)               (((x) & 0xf) << 26)
  25 #define PLL_MFD(x)              (((x) & 0x3ff) << 16)
  26 #define PLL_MFI(x)              (((x) & 0xf) << 10)
  27 #define PLL_MFN(x)              (((x) & 0x3ff) << 0)
  28
  29 #define TYPE_IMX_CCM "imx.ccm"
  30 #define IMX_CCM(obj) \
  31      OBJECT_CHECK(IMXCCMState, (obj), TYPE_IMX_CCM)
  32 #define IMX_CCM_CLASS(klass) \
  33      OBJECT_CLASS_CHECK(IMXCCMClass, (klass), TYPE_IMX_CCM)
  34 #define IMX_GET_CLASS(obj) \
  35      OBJECT_GET_CLASS(IMXCCMClass, (obj), TYPE_IMX_CCM)
  36
  37 typedef struct IMXCCMState {
  38     /* <private> */
  39     SysBusDevice parent_obj;
  40
  41     /* <public> */
  42
  43 } IMXCCMState;
  44
  45 typedef enum  {
  46     CLK_NONE,
  47     CLK_IPG,
  48     CLK_IPG_HIGH,
  49     CLK_32k,
  50     CLK_EXT,
  51     CLK_HIGH_DIV,
  52     CLK_HIGH,
  53 } IMXClk;
  54
  55 typedef struct IMXCCMClass {
  56     /* <private> */
  57     SysBusDeviceClass parent_class;
  58
  59     /* <public> */
  60     uint32_t (*get_clock_frequency)(IMXCCMState *s, IMXClk clk);
  61 } IMXCCMClass;
  62
  63 uint32_t imx_ccm_calc_pll(uint32_t pllreg, uint32_t base_freq);
  64
  65 uint32_t imx_ccm_get_clock_frequency(IMXCCMState *s, IMXClk clock);
  66
  67 #endif /* IMX_CCM_H */