drivers/clk/sunxi-ng/ccu_common.h

   1 /*
   2  * Copyright (c) 2016 Maxime Ripard. All rights reserved.
   3  *
   4  * This software is licensed under the terms of the GNU General Public
   5  * License version 2, as published by the Free Software Foundation, and
   6  * may be copied, distributed, and modified under those terms.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #ifndef _COMMON_H_
  15 #define _COMMON_H_
  16
  17 #include <linux/compiler.h>
  18 #include <linux/clk-provider.h>
  19
  20 #define CCU_FEATURE_FRACTIONAL          BIT(0)
  21 #define CCU_FEATURE_VARIABLE_PREDIV     BIT(1)
  22 #define CCU_FEATURE_FIXED_PREDIV        BIT(2)
  23 #define CCU_FEATURE_FIXED_POSTDIV       BIT(3)
  24
  25 struct device_node;
  26
  27 #define CLK_HW_INIT(_name, _parent, _ops, _flags)                       \
  28         &(struct clk_init_data) {                                       \
  29                 .flags          = _flags,                               \
  30                 .name           = _name,                                \
  31                 .parent_names   = (const char *[]) { _parent },         \
  32                 .num_parents    = 1,                                    \
  33                 .ops            = _ops,                                 \
  34         }
  35
  36 #define CLK_HW_INIT_PARENTS(_name, _parents, _ops, _flags)              \
  37         &(struct clk_init_data) {                                       \
  38                 .flags          = _flags,                               \
  39                 .name           = _name,                                \
  40                 .parent_names   = _parents,                             \
  41                 .num_parents    = ARRAY_SIZE(_parents),                 \
  42                 .ops            = _ops,                                 \
  43         }
  44
  45 #define CLK_FIXED_FACTOR(_struct, _name, _parent,                       \
  46                         _div, _mult, _flags)                            \
  47         struct clk_fixed_factor _struct = {                             \
  48                 .div            = _div,                                 \
  49                 .mult           = _mult,                                \
  50                 .hw.init        = CLK_HW_INIT(_name,                    \
  51                                               _parent,                  \
  52                                               &clk_fixed_factor_ops,    \
  53                                               _flags),                  \
  54         }
  55
  56 struct ccu_common {
  57         void __iomem    *base;
  58         u16             reg;
  59
  60         unsigned long   features;
  61         spinlock_t      *lock;
  62         struct clk_hw   hw;
  63 };
  64
  65 static inline struct ccu_common *hw_to_ccu_common(struct clk_hw *hw)
  66 {
  67         return container_of(hw, struct ccu_common, hw);
  68 }
  69
  70 struct sunxi_ccu_desc {
  71         struct ccu_common               **ccu_clks;
  72         unsigned long                   num_ccu_clks;
  73
  74         struct clk_hw_onecell_data      *hw_clks;
  75
  76         struct ccu_reset_map            *resets;
  77         unsigned long                   num_resets;
  78 };
  79
  80 void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock);
  81
  82 int sunxi_ccu_probe(struct device_node *node, void __iomem *reg,
  83                     const struct sunxi_ccu_desc *desc);
  84
  85 #endif /* _COMMON_H_ */