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
hw_to_ccu_common(struct clk_hw * hw)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_ */
86