GNU Linux-libre 4.19.314-gnu1
[releases.git] / 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 #define CCU_FEATURE_ALL_PREDIV          BIT(4)
25 #define CCU_FEATURE_LOCK_REG            BIT(5)
26 #define CCU_FEATURE_MMC_TIMING_SWITCH   BIT(6)
27 #define CCU_FEATURE_SIGMA_DELTA_MOD     BIT(7)
28
29 /* MMC timing mode switch bit */
30 #define CCU_MMC_NEW_TIMING_MODE         BIT(30)
31
32 struct device_node;
33
34 struct ccu_common {
35         void __iomem    *base;
36         u16             reg;
37         u16             lock_reg;
38         u32             prediv;
39
40         unsigned long   features;
41         spinlock_t      *lock;
42         struct clk_hw   hw;
43 };
44
45 static inline struct ccu_common *hw_to_ccu_common(struct clk_hw *hw)
46 {
47         return container_of(hw, struct ccu_common, hw);
48 }
49
50 struct sunxi_ccu_desc {
51         struct ccu_common               **ccu_clks;
52         unsigned long                   num_ccu_clks;
53
54         struct clk_hw_onecell_data      *hw_clks;
55
56         struct ccu_reset_map            *resets;
57         unsigned long                   num_resets;
58 };
59
60 void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock);
61
62 struct ccu_pll_nb {
63         struct notifier_block   clk_nb;
64         struct ccu_common       *common;
65
66         u32     enable;
67         u32     lock;
68 };
69
70 #define to_ccu_pll_nb(_nb) container_of(_nb, struct ccu_pll_nb, clk_nb)
71
72 int ccu_pll_notifier_register(struct ccu_pll_nb *pll_nb);
73
74 int sunxi_ccu_probe(struct device_node *node, void __iomem *reg,
75                     const struct sunxi_ccu_desc *desc);
76
77 #endif /* _COMMON_H_ */