arch/c6x/include/asm/clock.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * TI C64X clock definitions
   4  *
   5  * Copyright (C) 2010, 2011 Texas Instruments.
   6  * Contributed by: Mark Salter <msalter@redhat.com>
   7  *
   8  * Copied heavily from arm/mach-davinci/clock.h, so:
   9  *
  10  * Copyright (C) 2006-2007 Texas Instruments.
  11  * Copyright (C) 2008-2009 Deep Root Systems, LLC
  12  */
  13
  14 #ifndef _ASM_C6X_CLOCK_H
  15 #define _ASM_C6X_CLOCK_H
  16
  17 #ifndef __ASSEMBLER__
  18
  19 #include <linux/list.h>
  20
  21 /* PLL/Reset register offsets */
  22 #define PLLCTL          0x100
  23 #define PLLM            0x110
  24 #define PLLPRE          0x114
  25 #define PLLDIV1         0x118
  26 #define PLLDIV2         0x11c
  27 #define PLLDIV3         0x120
  28 #define PLLPOST         0x128
  29 #define PLLCMD          0x138
  30 #define PLLSTAT         0x13c
  31 #define PLLALNCTL       0x140
  32 #define PLLDCHANGE      0x144
  33 #define PLLCKEN         0x148
  34 #define PLLCKSTAT       0x14c
  35 #define PLLSYSTAT       0x150
  36 #define PLLDIV4         0x160
  37 #define PLLDIV5         0x164
  38 #define PLLDIV6         0x168
  39 #define PLLDIV7         0x16c
  40 #define PLLDIV8         0x170
  41 #define PLLDIV9         0x174
  42 #define PLLDIV10        0x178
  43 #define PLLDIV11        0x17c
  44 #define PLLDIV12        0x180
  45 #define PLLDIV13        0x184
  46 #define PLLDIV14        0x188
  47 #define PLLDIV15        0x18c
  48 #define PLLDIV16        0x190
  49
  50 /* PLLM register bits */
  51 #define PLLM_PLLM_MASK  0xff
  52 #define PLLM_VAL(x)     ((x) - 1)
  53
  54 /* PREDIV register bits */
  55 #define PLLPREDIV_EN    BIT(15)
  56 #define PLLPREDIV_VAL(x) ((x) - 1)
  57
  58 /* PLLCTL register bits */
  59 #define PLLCTL_PLLEN    BIT(0)
  60 #define PLLCTL_PLLPWRDN BIT(1)
  61 #define PLLCTL_PLLRST   BIT(3)
  62 #define PLLCTL_PLLDIS   BIT(4)
  63 #define PLLCTL_PLLENSRC BIT(5)
  64 #define PLLCTL_CLKMODE  BIT(8)
  65
  66 /* PLLCMD register bits */
  67 #define PLLCMD_GOSTAT   BIT(0)
  68
  69 /* PLLSTAT register bits */
  70 #define PLLSTAT_GOSTAT  BIT(0)
  71
  72 /* PLLDIV register bits */
  73 #define PLLDIV_EN       BIT(15)
  74 #define PLLDIV_RATIO_MASK 0x1f
  75 #define PLLDIV_RATIO(x) ((x) - 1)
  76
  77 struct pll_data;
  78
  79 struct clk {
  80         struct list_head        node;
  81         struct module           *owner;
  82         const char              *name;
  83         unsigned long           rate;
  84         int                     usecount;
  85         u32                     flags;
  86         struct clk              *parent;
  87         struct list_head        children;       /* list of children */
  88         struct list_head        childnode;      /* parent's child list node */
  89         struct pll_data         *pll_data;
  90         u32                     div;
  91         unsigned long (*recalc) (struct clk *);
  92         int (*set_rate) (struct clk *clk, unsigned long rate);
  93         int (*round_rate) (struct clk *clk, unsigned long rate);
  94 };
  95
  96 /* Clock flags: SoC-specific flags start at BIT(16) */
  97 #define ALWAYS_ENABLED          BIT(1)
  98 #define CLK_PLL                 BIT(2) /* PLL-derived clock */
  99 #define PRE_PLL                 BIT(3) /* source is before PLL mult/div */
 100 #define FIXED_DIV_PLL           BIT(4) /* fixed divisor from PLL */
 101 #define FIXED_RATE_PLL          BIT(5) /* fixed output rate PLL */
 102
 103 #define MAX_PLL_SYSCLKS 16
 104
 105 struct pll_data {
 106         void __iomem *base;
 107         u32 num;
 108         u32 flags;
 109         u32 input_rate;
 110         u32 bypass_delay; /* in loops */
 111         u32 reset_delay;  /* in loops */
 112         u32 lock_delay;   /* in loops */
 113         struct clk sysclks[MAX_PLL_SYSCLKS + 1];
 114 };
 115
 116 /* pll_data flag bit */
 117 #define PLL_HAS_PRE     BIT(0)
 118 #define PLL_HAS_MUL     BIT(1)
 119 #define PLL_HAS_POST    BIT(2)
 120
 121 #define CLK(dev, con, ck)       \
 122         {                       \
 123                 .dev_id = dev,  \
 124                 .con_id = con,  \
 125                 .clk = ck,      \
 126         }                       \
 127
 128 extern void c6x_clks_init(struct clk_lookup *clocks);
 129 extern int clk_register(struct clk *clk);
 130 extern void clk_unregister(struct clk *clk);
 131 extern void c64x_setup_clocks(void);
 132
 133 extern struct pll_data c6x_soc_pll1;
 134
 135 extern struct clk clkin1;
 136 extern struct clk c6x_core_clk;
 137 extern struct clk c6x_i2c_clk;
 138 extern struct clk c6x_watchdog_clk;
 139 extern struct clk c6x_mcbsp1_clk;
 140 extern struct clk c6x_mcbsp2_clk;
 141 extern struct clk c6x_mdio_clk;
 142
 143 #endif
 144
 145 #endif /* _ASM_C6X_CLOCK_H */