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8#include <linux/i2c.h>
9#include <linux/init.h>
10#include <linux/kernel.h>
11#include <linux/mfd/core.h>
12#include <linux/mfd/rsmu.h>
13#include <linux/module.h>
14#include <linux/of.h>
15#include <linux/regmap.h>
16#include <linux/slab.h>
17
18#include "rsmu.h"
19
20
21
22
23
24#define RSMU_CM_PAGE_ADDR 0xFD
25#define RSMU_CM_PAGE_WINDOW 256
26
27
28
29
30
31#define RSMU_SABRE_PAGE_ADDR 0x7F
32#define RSMU_SABRE_PAGE_WINDOW 128
33
34static const struct regmap_range_cfg rsmu_cm_range_cfg[] = {
35 {
36 .range_min = 0,
37 .range_max = 0xD000,
38 .selector_reg = RSMU_CM_PAGE_ADDR,
39 .selector_mask = 0xFF,
40 .selector_shift = 0,
41 .window_start = 0,
42 .window_len = RSMU_CM_PAGE_WINDOW,
43 }
44};
45
46static const struct regmap_range_cfg rsmu_sabre_range_cfg[] = {
47 {
48 .range_min = 0,
49 .range_max = 0x400,
50 .selector_reg = RSMU_SABRE_PAGE_ADDR,
51 .selector_mask = 0xFF,
52 .selector_shift = 0,
53 .window_start = 0,
54 .window_len = RSMU_SABRE_PAGE_WINDOW,
55 }
56};
57
58static bool rsmu_cm_volatile_reg(struct device *dev, unsigned int reg)
59{
60 switch (reg) {
61 case RSMU_CM_PAGE_ADDR:
62 return false;
63 default:
64 return true;
65 }
66}
67
68static bool rsmu_sabre_volatile_reg(struct device *dev, unsigned int reg)
69{
70 switch (reg) {
71 case RSMU_SABRE_PAGE_ADDR:
72 return false;
73 default:
74 return true;
75 }
76}
77
78static const struct regmap_config rsmu_cm_regmap_config = {
79 .reg_bits = 8,
80 .val_bits = 8,
81 .max_register = 0xD000,
82 .ranges = rsmu_cm_range_cfg,
83 .num_ranges = ARRAY_SIZE(rsmu_cm_range_cfg),
84 .volatile_reg = rsmu_cm_volatile_reg,
85 .cache_type = REGCACHE_RBTREE,
86 .can_multi_write = true,
87};
88
89static const struct regmap_config rsmu_sabre_regmap_config = {
90 .reg_bits = 8,
91 .val_bits = 8,
92 .max_register = 0x400,
93 .ranges = rsmu_sabre_range_cfg,
94 .num_ranges = ARRAY_SIZE(rsmu_sabre_range_cfg),
95 .volatile_reg = rsmu_sabre_volatile_reg,
96 .cache_type = REGCACHE_RBTREE,
97 .can_multi_write = true,
98};
99
100static const struct regmap_config rsmu_sl_regmap_config = {
101 .reg_bits = 16,
102 .val_bits = 8,
103 .reg_format_endian = REGMAP_ENDIAN_BIG,
104 .max_register = 0x339,
105 .cache_type = REGCACHE_NONE,
106 .can_multi_write = true,
107};
108
109static int rsmu_i2c_probe(struct i2c_client *client,
110 const struct i2c_device_id *id)
111{
112 const struct regmap_config *cfg;
113 struct rsmu_ddata *rsmu;
114 int ret;
115
116 rsmu = devm_kzalloc(&client->dev, sizeof(*rsmu), GFP_KERNEL);
117 if (!rsmu)
118 return -ENOMEM;
119
120 i2c_set_clientdata(client, rsmu);
121
122 rsmu->dev = &client->dev;
123 rsmu->type = (enum rsmu_type)id->driver_data;
124
125 switch (rsmu->type) {
126 case RSMU_CM:
127 cfg = &rsmu_cm_regmap_config;
128 break;
129 case RSMU_SABRE:
130 cfg = &rsmu_sabre_regmap_config;
131 break;
132 case RSMU_SL:
133 cfg = &rsmu_sl_regmap_config;
134 break;
135 default:
136 dev_err(rsmu->dev, "Unsupported RSMU device type: %d\n", rsmu->type);
137 return -ENODEV;
138 }
139 rsmu->regmap = devm_regmap_init_i2c(client, cfg);
140 if (IS_ERR(rsmu->regmap)) {
141 ret = PTR_ERR(rsmu->regmap);
142 dev_err(rsmu->dev, "Failed to allocate register map: %d\n", ret);
143 return ret;
144 }
145
146 return rsmu_core_init(rsmu);
147}
148
149static int rsmu_i2c_remove(struct i2c_client *client)
150{
151 struct rsmu_ddata *rsmu = i2c_get_clientdata(client);
152
153 rsmu_core_exit(rsmu);
154
155 return 0;
156}
157
158static const struct i2c_device_id rsmu_i2c_id[] = {
159 { "8a34000", RSMU_CM },
160 { "8a34001", RSMU_CM },
161 { "82p33810", RSMU_SABRE },
162 { "82p33811", RSMU_SABRE },
163 { "8v19n850", RSMU_SL },
164 { "8v19n851", RSMU_SL },
165 {}
166};
167MODULE_DEVICE_TABLE(i2c, rsmu_i2c_id);
168
169static const struct of_device_id rsmu_i2c_of_match[] = {
170 { .compatible = "idt,8a34000", .data = (void *)RSMU_CM },
171 { .compatible = "idt,8a34001", .data = (void *)RSMU_CM },
172 { .compatible = "idt,82p33810", .data = (void *)RSMU_SABRE },
173 { .compatible = "idt,82p33811", .data = (void *)RSMU_SABRE },
174 { .compatible = "idt,8v19n850", .data = (void *)RSMU_SL },
175 { .compatible = "idt,8v19n851", .data = (void *)RSMU_SL },
176 {}
177};
178MODULE_DEVICE_TABLE(of, rsmu_i2c_of_match);
179
180static struct i2c_driver rsmu_i2c_driver = {
181 .driver = {
182 .name = "rsmu-i2c",
183 .of_match_table = of_match_ptr(rsmu_i2c_of_match),
184 },
185 .probe = rsmu_i2c_probe,
186 .remove = rsmu_i2c_remove,
187 .id_table = rsmu_i2c_id,
188};
189
190static int __init rsmu_i2c_init(void)
191{
192 return i2c_add_driver(&rsmu_i2c_driver);
193}
194subsys_initcall(rsmu_i2c_init);
195
196static void __exit rsmu_i2c_exit(void)
197{
198 i2c_del_driver(&rsmu_i2c_driver);
199}
200module_exit(rsmu_i2c_exit);
201
202MODULE_DESCRIPTION("Renesas SMU I2C driver");
203MODULE_LICENSE("GPL");
204
