arch/arm/mach-davinci/clock.h

   1 /*
   2  * TI DaVinci clock definitions
   3  *
   4  * Copyright (C) 2006-2007 Texas Instruments.
   5  * Copyright (C) 2008-2009 Deep Root Systems, LLC
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #ifndef __ARCH_ARM_DAVINCI_CLOCK_H
  13 #define __ARCH_ARM_DAVINCI_CLOCK_H
  14
  15 #include <linux/list.h>
  16 #include <asm/clkdev.h>
  17
  18 #define DAVINCI_PLL1_BASE 0x01c40800
  19 #define DAVINCI_PLL2_BASE 0x01c40c00
  20 #define MAX_PLL 2
  21
  22 /* PLL/Reset register offsets */
  23 #define PLLCTL          0x100
  24 #define PLLCTL_PLLEN    BIT(0)
  25 #define PLLCTL_CLKMODE  BIT(8)
  26
  27 #define PLLM            0x110
  28 #define PLLM_PLLM_MASK  0xff
  29
  30 #define PREDIV          0x114
  31 #define PLLDIV1         0x118
  32 #define PLLDIV2         0x11c
  33 #define PLLDIV3         0x120
  34 #define POSTDIV         0x128
  35 #define BPDIV           0x12c
  36 #define PLLCMD          0x138
  37 #define PLLSTAT         0x13c
  38 #define PLLALNCTL       0x140
  39 #define PLLDCHANGE      0x144
  40 #define PLLCKEN         0x148
  41 #define PLLCKSTAT       0x14c
  42 #define PLLSYSTAT       0x150
  43 #define PLLDIV4         0x160
  44 #define PLLDIV5         0x164
  45 #define PLLDIV6         0x168
  46 #define PLLDIV7         0x16c
  47 #define PLLDIV8         0x170
  48 #define PLLDIV9         0x174
  49 #define PLLDIV_EN       BIT(15)
  50 #define PLLDIV_RATIO_MASK 0x1f
  51
  52 struct pll_data {
  53         u32 phys_base;
  54         void __iomem *base;
  55         u32 num;
  56         u32 flags;
  57         u32 input_rate;
  58 };
  59 #define PLL_HAS_PREDIV          0x01
  60 #define PLL_HAS_POSTDIV         0x02
  61
  62 struct clk {
  63         struct list_head        node;
  64         struct module           *owner;
  65         const char              *name;
  66         unsigned long           rate;
  67         u8                      usecount;
  68         u8                      flags;
  69         u8                      lpsc;
  70         u8                      psc_ctlr;
  71         struct clk              *parent;
  72         struct pll_data         *pll_data;
  73         u32                     div_reg;
  74 };
  75
  76 /* Clock flags */
  77 #define ALWAYS_ENABLED          BIT(1)
  78 #define CLK_PSC                 BIT(2)
  79 #define PSC_DSP                 BIT(3) /* PSC uses DSP domain, not ARM */
  80 #define CLK_PLL                 BIT(4) /* PLL-derived clock */
  81 #define PRE_PLL                 BIT(5) /* source is before PLL mult/div */
  82
  83 struct davinci_clk {
  84         struct clk_lookup lk;
  85 };
  86
  87 #define CLK(dev, con, ck)               \
  88         {                               \
  89                 .lk = {                 \
  90                         .dev_id = dev,  \
  91                         .con_id = con,  \
  92                         .clk = ck,      \
  93                 },                      \
  94         }
  95
  96 int davinci_clk_init(struct davinci_clk *clocks);
  97
  98 extern struct platform_device davinci_wdt_device;
  99
 100 #endif