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 #include "qom/object.h"
  16
  17 #define CKIL_FREQ 32768 /* nominal 32khz clock */
  18
  19 /* PLL control registers */
  20 #define PD(v) (((v) >> 26) & 0xf)
  21 #define MFD(v) (((v) >> 16) & 0x3ff)
  22 #define MFI(v) (((v) >> 10) & 0xf);
  23 #define MFN(v) ((v) & 0x3ff)
  24
  25 #define PLL_PD(x)               (((x) & 0xf) << 26)
  26 #define PLL_MFD(x)              (((x) & 0x3ff) << 16)
  27 #define PLL_MFI(x)              (((x) & 0xf) << 10)
  28 #define PLL_MFN(x)              (((x) & 0x3ff) << 0)
  29
  30 #define TYPE_IMX_CCM "imx.ccm"
  31 OBJECT_DECLARE_TYPE(IMXCCMState, IMXCCMClass, IMX_CCM)
  32
  33 struct IMXCCMState {
  34     /* <private> */
  35     SysBusDevice parent_obj;
  36
  37     /* <public> */
  38
  39 };
  40
  41 typedef enum  {
  42     CLK_NONE,
  43     CLK_IPG,
  44     CLK_IPG_HIGH,
  45     CLK_32k,
  46     CLK_EXT,
  47     CLK_HIGH_DIV,
  48     CLK_HIGH,
  49 } IMXClk;
  50
  51 struct IMXCCMClass {
  52     /* <private> */
  53     SysBusDeviceClass parent_class;
  54
  55     /* <public> */
  56     uint32_t (*get_clock_frequency)(IMXCCMState *s, IMXClk clk);
  57 };
  58
  59 uint32_t imx_ccm_calc_pll(uint32_t pllreg, uint32_t base_freq);
  60
  61 uint32_t imx_ccm_get_clock_frequency(IMXCCMState *s, IMXClk clock);
  62
  63 #endif /* IMX_CCM_H */