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