1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Clock framework definitions for SPEAr platform
4 *
5 * Copyright (C) 2012 ST Microelectronics
6 * Viresh Kumar <vireshk@kernel.org>
7 */
8
9#ifndef __SPEAR_CLK_H
10#define __SPEAR_CLK_H
11
12#include <linux/clk-provider.h>
13#include <linux/spinlock_types.h>
14#include <linux/types.h>
15
16/* Auxiliary Synth clk */
17/* Default masks */
18#define AUX_EQ_SEL_SHIFT 30
19#define AUX_EQ_SEL_MASK 1
20#define AUX_EQ1_SEL 0
21#define AUX_EQ2_SEL 1
22#define AUX_XSCALE_SHIFT 16
23#define AUX_XSCALE_MASK 0xFFF
24#define AUX_YSCALE_SHIFT 0
25#define AUX_YSCALE_MASK 0xFFF
26#define AUX_SYNT_ENB 31
27
28struct aux_clk_masks {
29 u32 eq_sel_mask;
30 u32 eq_sel_shift;
31 u32 eq1_mask;
32 u32 eq2_mask;
33 u32 xscale_sel_mask;
34 u32 xscale_sel_shift;
35 u32 yscale_sel_mask;
36 u32 yscale_sel_shift;
37 u32 enable_bit;
38};
39
40struct aux_rate_tbl {
41 u16 xscale;
42 u16 yscale;
43 u8 eq;
44};
45
46struct clk_aux {
47 struct clk_hw hw;
48 void __iomem *reg;
49 const struct aux_clk_masks *masks;
50 struct aux_rate_tbl *rtbl;
51 u8 rtbl_cnt;
52 spinlock_t *lock;
53};
54
55/* Fractional Synth clk */
56struct frac_rate_tbl {
57 u32 div;
58};
59
60struct clk_frac {
61 struct clk_hw hw;
62 void __iomem *reg;
63 struct frac_rate_tbl *rtbl;
64 u8 rtbl_cnt;
65 spinlock_t *lock;
66};
67
68/* GPT clk */
69struct gpt_rate_tbl {
70 u16 mscale;
71 u16 nscale;
72};
73
74struct clk_gpt {
75 struct clk_hw hw;
76 void __iomem *reg;
77 struct gpt_rate_tbl *rtbl;
78 u8 rtbl_cnt;
79 spinlock_t *lock;
80};
81
82/* VCO-PLL clk */
83struct pll_rate_tbl {
84 u8 mode;
85 u16 m;
86 u8 n;
87 u8 p;
88};
89
90struct clk_vco {
91 struct clk_hw hw;
92 void __iomem *mode_reg;
93 void __iomem *cfg_reg;
94 struct pll_rate_tbl *rtbl;
95 u8 rtbl_cnt;
96 spinlock_t *lock;
97};
98
99struct clk_pll {
100 struct clk_hw hw;
101 struct clk_vco *vco;
102 const char *parent[1];
103 spinlock_t *lock;
104};
105
106typedef unsigned long (*clk_calc_rate)(struct clk_hw *hw, unsigned long prate,
107 int index);
108
109/* clk register routines */
110struct clk *clk_register_aux(const char *aux_name, const char *gate_name,
111 const char *parent_name, unsigned long flags, void __iomem *reg,
112 const struct aux_clk_masks *masks, struct aux_rate_tbl *rtbl,
113 u8 rtbl_cnt, spinlock_t *lock, struct clk **gate_clk);
114struct clk *clk_register_frac(const char *name, const char *parent_name,
115 unsigned long flags, void __iomem *reg,
116 struct frac_rate_tbl *rtbl, u8 rtbl_cnt, spinlock_t *lock);
117struct clk *clk_register_gpt(const char *name, const char *parent_name, unsigned
118 long flags, void __iomem *reg, struct gpt_rate_tbl *rtbl, u8
119 rtbl_cnt, spinlock_t *lock);
120struct clk *clk_register_vco_pll(const char *vco_name, const char *pll_name,
121 const char *vco_gate_name, const char *parent_name,
122 unsigned long flags, void __iomem *mode_reg, void __iomem
123 *cfg_reg, struct pll_rate_tbl *rtbl, u8 rtbl_cnt,
124 spinlock_t *lock, struct clk **pll_clk,
125 struct clk **vco_gate_clk);
126
127long clk_round_rate_index(struct clk_hw *hw, unsigned long drate,
128 unsigned long parent_rate, clk_calc_rate calc_rate, u8 rtbl_cnt,
129 int *index);
130
131#endif /* __SPEAR_CLK_H */
132

source code of linux/drivers/clk/spear/clk.h