1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (c) 2015 Endless Mobile, Inc.
4 * Author: Carlo Caione <carlo@endlessm.com>
5 */
6
7 #ifndef __CLKC_H
8 #define __CLKC_H
9
10 #include <linux/clk-provider.h>
11 #include "clk-regmap.h"
12
13 #define PMASK(width) GENMASK(width - 1, 0)
14 #define SETPMASK(width, shift) GENMASK(shift + width - 1, shift)
15 #define CLRPMASK(width, shift) (~SETPMASK(width, shift))
16
17 #define PARM_GET(width, shift, reg) \
18 (((reg) & SETPMASK(width, shift)) >> (shift))
19 #define PARM_SET(width, shift, reg, val) \
20 (((reg) & CLRPMASK(width, shift)) | ((val) << (shift)))
21
22 #define MESON_PARM_APPLICABLE(p) (!!((p)->width))
23
24 struct parm {
25 u16 reg_off;
26 u8 shift;
27 u8 width;
28 };
29
meson_parm_read(struct regmap * map,struct parm * p)30 static inline unsigned int meson_parm_read(struct regmap *map, struct parm *p)
31 {
32 unsigned int val;
33
34 regmap_read(map, p->reg_off, &val);
35 return PARM_GET(p->width, p->shift, val);
36 }
37
meson_parm_write(struct regmap * map,struct parm * p,unsigned int val)38 static inline void meson_parm_write(struct regmap *map, struct parm *p,
39 unsigned int val)
40 {
41 regmap_update_bits(map, p->reg_off, SETPMASK(p->width, p->shift),
42 val << p->shift);
43 }
44
45
46 struct pll_rate_table {
47 unsigned long rate;
48 u16 m;
49 u16 n;
50 u16 od;
51 u16 od2;
52 u16 od3;
53 };
54
55 #define PLL_RATE(_r, _m, _n, _od) \
56 { \
57 .rate = (_r), \
58 .m = (_m), \
59 .n = (_n), \
60 .od = (_od), \
61 }
62
63 #define CLK_MESON_PLL_ROUND_CLOSEST BIT(0)
64
65 struct meson_clk_pll_data {
66 struct parm m;
67 struct parm n;
68 struct parm frac;
69 struct parm od;
70 struct parm od2;
71 struct parm od3;
72 struct parm l;
73 struct parm rst;
74 const struct reg_sequence *init_regs;
75 unsigned int init_count;
76 const struct pll_rate_table *table;
77 u8 flags;
78 };
79
80 #define to_meson_clk_pll(_hw) container_of(_hw, struct meson_clk_pll, hw)
81
82 struct meson_clk_mpll_data {
83 struct parm sdm;
84 struct parm sdm_en;
85 struct parm n2;
86 struct parm ssen;
87 struct parm misc;
88 spinlock_t *lock;
89 u8 flags;
90 };
91
92 #define CLK_MESON_MPLL_ROUND_CLOSEST BIT(0)
93
94 struct meson_clk_phase_data {
95 struct parm ph;
96 };
97
98 int meson_clk_degrees_from_val(unsigned int val, unsigned int width);
99 unsigned int meson_clk_degrees_to_val(int degrees, unsigned int width);
100
101 #define MESON_GATE(_name, _reg, _bit) \
102 struct clk_regmap _name = { \
103 .data = &(struct clk_regmap_gate_data){ \
104 .offset = (_reg), \
105 .bit_idx = (_bit), \
106 }, \
107 .hw.init = &(struct clk_init_data) { \
108 .name = #_name, \
109 .ops = &clk_regmap_gate_ops, \
110 .parent_names = (const char *[]){ "clk81" }, \
111 .num_parents = 1, \
112 .flags = (CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED), \
113 }, \
114 };
115
116 /* clk_ops */
117 extern const struct clk_ops meson_clk_pll_ro_ops;
118 extern const struct clk_ops meson_clk_pll_ops;
119 extern const struct clk_ops meson_clk_cpu_ops;
120 extern const struct clk_ops meson_clk_mpll_ro_ops;
121 extern const struct clk_ops meson_clk_mpll_ops;
122 extern const struct clk_ops meson_clk_phase_ops;
123
124 #endif /* __CLKC_H */
125