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
hw_to_ccu_common(struct clk_hw * hw)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_ */
78