1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (c) 2017 Chen-Yu Tsai. All rights reserved.
4 */
5
6 #ifndef _CCU_SDM_H
7 #define _CCU_SDM_H
8
9 #include <linux/clk-provider.h>
10
11 #include "ccu_common.h"
12
13 struct ccu_sdm_setting {
14 unsigned long rate;
15
16 /*
17 * XXX We don't know what the step and bottom register fields
18 * mean. Just copy the whole register value from the vendor
19 * kernel for now.
20 */
21 u32 pattern;
22
23 /*
24 * M and N factors here should be the values used in
25 * calculation, not the raw values written to registers
26 */
27 u32 m;
28 u32 n;
29 };
30
31 struct ccu_sdm_internal {
32 struct ccu_sdm_setting *table;
33 u32 table_size;
34 /* early SoCs don't have the SDM enable bit in the PLL register */
35 u32 enable;
36 /* second enable bit in tuning register */
37 u32 tuning_enable;
38 u16 tuning_reg;
39 };
40
41 #define _SUNXI_CCU_SDM(_table, _enable, \
42 _reg, _reg_enable) \
43 { \
44 .table = _table, \
45 .table_size = ARRAY_SIZE(_table), \
46 .enable = _enable, \
47 .tuning_enable = _reg_enable, \
48 .tuning_reg = _reg, \
49 }
50
51 bool ccu_sdm_helper_is_enabled(struct ccu_common *common,
52 struct ccu_sdm_internal *sdm);
53 void ccu_sdm_helper_enable(struct ccu_common *common,
54 struct ccu_sdm_internal *sdm,
55 unsigned long rate);
56 void ccu_sdm_helper_disable(struct ccu_common *common,
57 struct ccu_sdm_internal *sdm);
58
59 bool ccu_sdm_helper_has_rate(struct ccu_common *common,
60 struct ccu_sdm_internal *sdm,
61 unsigned long rate);
62
63 unsigned long ccu_sdm_helper_read_rate(struct ccu_common *common,
64 struct ccu_sdm_internal *sdm,
65 u32 m, u32 n);
66
67 int ccu_sdm_helper_get_factors(struct ccu_common *common,
68 struct ccu_sdm_internal *sdm,
69 unsigned long rate,
70 unsigned long *m, unsigned long *n);
71
72 #endif