arch/arm/mach-davinci/clock.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * TI DaVinci clock definitions
   4  *
   5  * Copyright (C) 2006-2007 Texas Instruments.
   6  * Copyright (C) 2008-2009 Deep Root Systems, LLC
   7  */
   8
   9 #ifndef __ARCH_ARM_DAVINCI_CLOCK_H
  10 #define __ARCH_ARM_DAVINCI_CLOCK_H
  11
  12 /* PLL/Reset register offsets */
  13 #define PLLCTL          0x100
  14 #define PLLCTL_PLLEN    BIT(0)
  15 #define PLLCTL_PLLPWRDN BIT(1)
  16 #define PLLCTL_PLLRST   BIT(3)
  17 #define PLLCTL_PLLDIS   BIT(4)
  18 #define PLLCTL_PLLENSRC BIT(5)
  19 #define PLLCTL_CLKMODE  BIT(8)
  20
  21 #define PLLM            0x110
  22 #define PLLM_PLLM_MASK  0xff
  23
  24 #define PREDIV          0x114
  25 #define PLLDIV1         0x118
  26 #define PLLDIV2         0x11c
  27 #define PLLDIV3         0x120
  28 #define POSTDIV         0x128
  29 #define BPDIV           0x12c
  30 #define PLLCMD          0x138
  31 #define PLLSTAT         0x13c
  32 #define PLLALNCTL       0x140
  33 #define PLLDCHANGE      0x144
  34 #define PLLCKEN         0x148
  35 #define PLLCKSTAT       0x14c
  36 #define PLLSYSTAT       0x150
  37 #define PLLDIV4         0x160
  38 #define PLLDIV5         0x164
  39 #define PLLDIV6         0x168
  40 #define PLLDIV7         0x16c
  41 #define PLLDIV8         0x170
  42 #define PLLDIV9         0x174
  43 #define PLLDIV_EN       BIT(15)
  44 #define PLLDIV_RATIO_MASK 0x1f
  45
  46 /*
  47  * OMAP-L138 system reference guide recommends a wait for 4 OSCIN/CLKIN
  48  * cycles to ensure that the PLLC has switched to bypass mode. Delay of 1us
  49  * ensures we are good for all > 4MHz OSCIN/CLKIN inputs. Typically the input
  50  * is ~25MHz. Units are micro seconds.
  51  */
  52 #define PLL_BYPASS_TIME         1
  53 /* From OMAP-L138 datasheet table 6-4. Units are micro seconds */
  54 #define PLL_RESET_TIME          1
  55 /*
  56  * From OMAP-L138 datasheet table 6-4; assuming prediv = 1, sqrt(pllm) = 4
  57  * Units are micro seconds.
  58  */
  59 #define PLL_LOCK_TIME           20
  60
  61 #endif