1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (c) 2016 Maxime Ripard. All rights reserved.
 4 */
 5
 6#ifndef _COMMON_H_
 7#define _COMMON_H_
 8
 9#include <linux/compiler.h>
10#include <linux/clk-provider.h>
11
12#define CCU_FEATURE_FRACTIONAL		BIT(0)
13#define CCU_FEATURE_VARIABLE_PREDIV	BIT(1)
14#define CCU_FEATURE_FIXED_PREDIV	BIT(2)
15#define CCU_FEATURE_FIXED_POSTDIV	BIT(3)
16#define CCU_FEATURE_ALL_PREDIV		BIT(4)
17#define CCU_FEATURE_LOCK_REG		BIT(5)
18#define CCU_FEATURE_MMC_TIMING_SWITCH	BIT(6)
19#define CCU_FEATURE_SIGMA_DELTA_MOD	BIT(7)
20#define CCU_FEATURE_KEY_FIELD		BIT(8)
21#define CCU_FEATURE_CLOSEST_RATE	BIT(9)
22
23/* MMC timing mode switch bit */
24#define CCU_MMC_NEW_TIMING_MODE		BIT(30)
25
26struct device_node;
27
28struct ccu_common {
29	void __iomem	*base;
30	u16		reg;
31	u16		lock_reg;
32	u32		prediv;
33
34	unsigned long	min_rate;
35	unsigned long	max_rate;
36
37	unsigned long	features;
38	spinlock_t	*lock;
39	struct clk_hw	hw;
40};
41
42static inline struct ccu_common *hw_to_ccu_common(struct clk_hw *hw)
43{
44	return container_of(hw, struct ccu_common, hw);
45}
46
47struct sunxi_ccu_desc {
48	struct ccu_common		**ccu_clks;
49	unsigned long			num_ccu_clks;
50
51	struct clk_hw_onecell_data	*hw_clks;
52
53	struct ccu_reset_map		*resets;
54	unsigned long			num_resets;
55};
56
57void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock);
58
59bool ccu_is_better_rate(struct ccu_common *common,
60			unsigned long target_rate,
61			unsigned long current_rate,
62			unsigned long best_rate);
63
64struct ccu_pll_nb {
65	struct notifier_block	clk_nb;
66	struct ccu_common	*common;
67
68	u32	enable;
69	u32	lock;
70};
71
72#define to_ccu_pll_nb(_nb) container_of(_nb, struct ccu_pll_nb, clk_nb)
73
74int ccu_pll_notifier_register(struct ccu_pll_nb *pll_nb);
75
76int devm_sunxi_ccu_probe(struct device *dev, void __iomem *reg,
77			 const struct sunxi_ccu_desc *desc);
78void of_sunxi_ccu_probe(struct device_node *node, void __iomem *reg,
79			const struct sunxi_ccu_desc *desc);
80
81#endif /* _COMMON_H_ */