arch/arm/include/asm/arch-sunxi/ccu.h

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2018 Amarula Solutions.
   4  * Author: Jagan Teki <[email protected]>
   5  */
   6
   7 #ifndef _ASM_ARCH_CCU_H
   8 #define _ASM_ARCH_CCU_H
   9
  10 #ifndef __ASSEMBLY__
  11 #include <linux/bitops.h>
  12 #endif
  13
  14 /**
  15  * enum ccu_flags - ccu clock/reset flags
  16  *
  17  * @CCU_CLK_F_IS_VALID:         is given clock gate is valid?
  18  * @CCU_RST_F_IS_VALID:         is given reset control is valid?
  19  */
  20 enum ccu_flags {
  21         CCU_CLK_F_IS_VALID              = BIT(0),
  22         CCU_RST_F_IS_VALID              = BIT(1),
  23 };
  24
  25 /**
  26  * struct ccu_clk_gate - ccu clock gate
  27  * @off:        gate offset
  28  * @bit:        gate bit
  29  * @flags:      ccu clock gate flags
  30  */
  31 struct ccu_clk_gate {
  32         u16 off;
  33         u32 bit;
  34         enum ccu_flags flags;
  35 };
  36
  37 #define GATE(_off, _bit) {                      \
  38         .off = _off,                            \
  39         .bit = _bit,                            \
  40         .flags = CCU_CLK_F_IS_VALID,            \
  41 }
  42
  43 /**
  44  * struct ccu_reset - ccu reset
  45  * @off:        reset offset
  46  * @bit:        reset bit
  47  * @flags:      ccu reset control flags
  48  */
  49 struct ccu_reset {
  50         u16 off;
  51         u32 bit;
  52         enum ccu_flags flags;
  53 };
  54
  55 #define RESET(_off, _bit) {                     \
  56         .off = _off,                            \
  57         .bit = _bit,                            \
  58         .flags = CCU_RST_F_IS_VALID,            \
  59 }
  60
  61 /**
  62  * struct ccu_desc - clock control unit descriptor
  63  *
  64  * @gates:      clock gates
  65  * @resets:     reset unit
  66  */
  67 struct ccu_desc {
  68         const struct ccu_clk_gate *gates;
  69         const struct ccu_reset *resets;
  70 };
  71
  72 /**
  73  * struct ccu_priv - sunxi clock control unit
  74  *
  75  * @base:       base address
  76  * @desc:       ccu descriptor
  77  */
  78 struct ccu_priv {
  79         void *base;
  80         const struct ccu_desc *desc;
  81 };
  82
  83 /**
  84  * sunxi_clk_probe - common sunxi clock probe
  85  * @dev:        clock device
  86  */
  87 int sunxi_clk_probe(struct udevice *dev);
  88
  89 extern struct clk_ops sunxi_clk_ops;
  90
  91 /**
  92  * sunxi_reset_bind() - reset binding
  93  *
  94  * @dev:       reset device
  95  * @count:     reset count
  96  * @return 0 success, or error value
  97  */
  98 int sunxi_reset_bind(struct udevice *dev, ulong count);
  99
 100 #endif /* _ASM_ARCH_CCU_H */