Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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#define CCU_FEATURE_DUAL_DIV BIT(10)
23#define CCU_FEATURE_UPDATE_BIT BIT(11)
24
25/* MMC timing mode switch bit */
26#define CCU_MMC_NEW_TIMING_MODE BIT(30)
27
28/* Some clocks need this bit to actually apply register changes */
29#define CCU_SUNXI_UPDATE_BIT BIT(27)
30
31struct device_node;
32
33struct ccu_common {
34 void __iomem *base;
35 u16 reg;
36 u16 lock_reg;
37 u32 prediv;
38
39 unsigned long min_rate;
40 unsigned long max_rate;
41
42 unsigned long features;
43 spinlock_t *lock;
44 struct clk_hw hw;
45};
46
47static inline struct ccu_common *hw_to_ccu_common(struct clk_hw *hw)
48{
49 return container_of(hw, struct ccu_common, hw);
50}
51
52struct sunxi_ccu_desc {
53 struct ccu_common **ccu_clks;
54 unsigned long num_ccu_clks;
55
56 struct clk_hw_onecell_data *hw_clks;
57
58 const struct ccu_reset_map *resets;
59 unsigned long num_resets;
60};
61
62void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock);
63
64bool ccu_is_better_rate(struct ccu_common *common,
65 unsigned long target_rate,
66 unsigned long current_rate,
67 unsigned long best_rate);
68
69struct ccu_pll_nb {
70 struct notifier_block clk_nb;
71 struct ccu_common *common;
72
73 u32 enable;
74 u32 lock;
75};
76
77#define to_ccu_pll_nb(_nb) container_of(_nb, struct ccu_pll_nb, clk_nb)
78
79int ccu_pll_notifier_register(struct ccu_pll_nb *pll_nb);
80
81int devm_sunxi_ccu_probe(struct device *dev, void __iomem *reg,
82 const struct sunxi_ccu_desc *desc);
83void of_sunxi_ccu_probe(struct device_node *node, void __iomem *reg,
84 const struct sunxi_ccu_desc *desc);
85
86#endif /* _COMMON_H_ */