2 * act8865-regulator.c - Voltage regulation for the active-semi ACT8865
3 * http://www.active-semi.com/sheets/ACT8865_Datasheet.pdf
5 * Copyright (C) 2013 Atmel Corporation
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/i2c.h>
21 #include <linux/err.h>
22 #include <linux/platform_device.h>
23 #include <linux/regulator/driver.h>
24 #include <linux/regulator/act8865.h>
26 #include <linux/of_device.h>
27 #include <linux/regulator/of_regulator.h>
28 #include <linux/regmap.h>
31 * ACT8865 Global Register Map.
33 #define ACT8865_SYS_MODE 0x00
34 #define ACT8865_SYS_CTRL 0x01
35 #define ACT8865_DCDC1_VSET1 0x20
36 #define ACT8865_DCDC1_VSET2 0x21
37 #define ACT8865_DCDC1_CTRL 0x22
38 #define ACT8865_DCDC2_VSET1 0x30
39 #define ACT8865_DCDC2_VSET2 0x31
40 #define ACT8865_DCDC2_CTRL 0x32
41 #define ACT8865_DCDC3_VSET1 0x40
42 #define ACT8865_DCDC3_VSET2 0x41
43 #define ACT8865_DCDC3_CTRL 0x42
44 #define ACT8865_LDO1_VSET 0x50
45 #define ACT8865_LDO1_CTRL 0x51
46 #define ACT8865_LDO2_VSET 0x54
47 #define ACT8865_LDO2_CTRL 0x55
48 #define ACT8865_LDO3_VSET 0x60
49 #define ACT8865_LDO3_CTRL 0x61
50 #define ACT8865_LDO4_VSET 0x64
51 #define ACT8865_LDO4_CTRL 0x65
56 #define ACT8865_ENA 0x80 /* ON - [7] */
57 #define ACT8865_VSEL_MASK 0x3F /* VSET - [5:0] */
60 * ACT8865 voltage number
62 #define ACT8865_VOLTAGE_NUM 64
65 struct regulator_dev
*rdev
[ACT8865_REG_NUM
];
66 struct regmap
*regmap
;
69 static const struct regmap_config act8865_regmap_config
= {
74 static const struct regulator_linear_range act8865_volatge_ranges
[] = {
75 REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
76 REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
77 REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
80 static struct regulator_ops act8865_ops
= {
81 .list_voltage
= regulator_list_voltage_linear_range
,
82 .map_voltage
= regulator_map_voltage_linear_range
,
83 .get_voltage_sel
= regulator_get_voltage_sel_regmap
,
84 .set_voltage_sel
= regulator_set_voltage_sel_regmap
,
85 .enable
= regulator_enable_regmap
,
86 .disable
= regulator_disable_regmap
,
87 .is_enabled
= regulator_is_enabled_regmap
,
88 .set_suspend_enable
= regulator_enable_regmap
,
89 .set_suspend_disable
= regulator_disable_regmap
,
92 static const struct regulator_desc act8865_reg
[] = {
95 .id
= ACT8865_ID_DCDC1
,
97 .type
= REGULATOR_VOLTAGE
,
98 .n_voltages
= ACT8865_VOLTAGE_NUM
,
99 .linear_ranges
= act8865_volatge_ranges
,
100 .n_linear_ranges
= ARRAY_SIZE(act8865_volatge_ranges
),
101 .vsel_reg
= ACT8865_DCDC1_VSET1
,
102 .vsel_mask
= ACT8865_VSEL_MASK
,
103 .enable_reg
= ACT8865_DCDC1_CTRL
,
104 .enable_mask
= ACT8865_ENA
,
105 .owner
= THIS_MODULE
,
109 .id
= ACT8865_ID_DCDC2
,
111 .type
= REGULATOR_VOLTAGE
,
112 .n_voltages
= ACT8865_VOLTAGE_NUM
,
113 .linear_ranges
= act8865_volatge_ranges
,
114 .n_linear_ranges
= ARRAY_SIZE(act8865_volatge_ranges
),
115 .vsel_reg
= ACT8865_DCDC2_VSET1
,
116 .vsel_mask
= ACT8865_VSEL_MASK
,
117 .enable_reg
= ACT8865_DCDC2_CTRL
,
118 .enable_mask
= ACT8865_ENA
,
119 .owner
= THIS_MODULE
,
123 .id
= ACT8865_ID_DCDC3
,
125 .type
= REGULATOR_VOLTAGE
,
126 .n_voltages
= ACT8865_VOLTAGE_NUM
,
127 .linear_ranges
= act8865_volatge_ranges
,
128 .n_linear_ranges
= ARRAY_SIZE(act8865_volatge_ranges
),
129 .vsel_reg
= ACT8865_DCDC3_VSET1
,
130 .vsel_mask
= ACT8865_VSEL_MASK
,
131 .enable_reg
= ACT8865_DCDC3_CTRL
,
132 .enable_mask
= ACT8865_ENA
,
133 .owner
= THIS_MODULE
,
137 .id
= ACT8865_ID_LDO1
,
139 .type
= REGULATOR_VOLTAGE
,
140 .n_voltages
= ACT8865_VOLTAGE_NUM
,
141 .linear_ranges
= act8865_volatge_ranges
,
142 .n_linear_ranges
= ARRAY_SIZE(act8865_volatge_ranges
),
143 .vsel_reg
= ACT8865_LDO1_VSET
,
144 .vsel_mask
= ACT8865_VSEL_MASK
,
145 .enable_reg
= ACT8865_LDO1_CTRL
,
146 .enable_mask
= ACT8865_ENA
,
147 .owner
= THIS_MODULE
,
151 .id
= ACT8865_ID_LDO2
,
153 .type
= REGULATOR_VOLTAGE
,
154 .n_voltages
= ACT8865_VOLTAGE_NUM
,
155 .linear_ranges
= act8865_volatge_ranges
,
156 .n_linear_ranges
= ARRAY_SIZE(act8865_volatge_ranges
),
157 .vsel_reg
= ACT8865_LDO2_VSET
,
158 .vsel_mask
= ACT8865_VSEL_MASK
,
159 .enable_reg
= ACT8865_LDO2_CTRL
,
160 .enable_mask
= ACT8865_ENA
,
161 .owner
= THIS_MODULE
,
165 .id
= ACT8865_ID_LDO3
,
167 .type
= REGULATOR_VOLTAGE
,
168 .n_voltages
= ACT8865_VOLTAGE_NUM
,
169 .linear_ranges
= act8865_volatge_ranges
,
170 .n_linear_ranges
= ARRAY_SIZE(act8865_volatge_ranges
),
171 .vsel_reg
= ACT8865_LDO3_VSET
,
172 .vsel_mask
= ACT8865_VSEL_MASK
,
173 .enable_reg
= ACT8865_LDO3_CTRL
,
174 .enable_mask
= ACT8865_ENA
,
175 .owner
= THIS_MODULE
,
179 .id
= ACT8865_ID_LDO4
,
181 .type
= REGULATOR_VOLTAGE
,
182 .n_voltages
= ACT8865_VOLTAGE_NUM
,
183 .linear_ranges
= act8865_volatge_ranges
,
184 .n_linear_ranges
= ARRAY_SIZE(act8865_volatge_ranges
),
185 .vsel_reg
= ACT8865_LDO4_VSET
,
186 .vsel_mask
= ACT8865_VSEL_MASK
,
187 .enable_reg
= ACT8865_LDO4_CTRL
,
188 .enable_mask
= ACT8865_ENA
,
189 .owner
= THIS_MODULE
,
194 static const struct of_device_id act8865_dt_ids
[] = {
195 { .compatible
= "active-semi,act8865" },
198 MODULE_DEVICE_TABLE(of
, act8865_dt_ids
);
200 static struct of_regulator_match act8865_matches
[] = {
201 [ACT8865_ID_DCDC1
] = { .name
= "DCDC_REG1"},
202 [ACT8865_ID_DCDC2
] = { .name
= "DCDC_REG2"},
203 [ACT8865_ID_DCDC3
] = { .name
= "DCDC_REG3"},
204 [ACT8865_ID_LDO1
] = { .name
= "LDO_REG1"},
205 [ACT8865_ID_LDO2
] = { .name
= "LDO_REG2"},
206 [ACT8865_ID_LDO3
] = { .name
= "LDO_REG3"},
207 [ACT8865_ID_LDO4
] = { .name
= "LDO_REG4"},
210 static int act8865_pdata_from_dt(struct device
*dev
,
211 struct device_node
**of_node
,
212 struct act8865_platform_data
*pdata
)
215 struct device_node
*np
;
216 struct act8865_regulator_data
*regulator
;
218 np
= of_find_node_by_name(dev
->of_node
, "regulators");
220 dev_err(dev
, "missing 'regulators' subnode in DT\n");
224 matched
= of_regulator_match(dev
, np
,
225 act8865_matches
, ARRAY_SIZE(act8865_matches
));
229 pdata
->regulators
= devm_kzalloc(dev
,
230 sizeof(struct act8865_regulator_data
) * matched
,
232 if (!pdata
->regulators
) {
233 dev_err(dev
, "%s: failed to allocate act8865 registor\n",
238 pdata
->num_regulators
= matched
;
239 regulator
= pdata
->regulators
;
241 for (i
= 0; i
< matched
; i
++) {
242 if (!act8865_matches
[i
].init_data
)
246 regulator
->name
= act8865_matches
[i
].name
;
247 regulator
->platform_data
= act8865_matches
[i
].init_data
;
248 of_node
[i
] = act8865_matches
[i
].of_node
;
255 static inline int act8865_pdata_from_dt(struct device
*dev
,
256 struct device_node
**of_node
,
257 struct act8865_platform_data
*pdata
)
263 static int act8865_pmic_probe(struct i2c_client
*client
,
264 const struct i2c_device_id
*i2c_id
)
266 struct regulator_dev
**rdev
;
267 struct device
*dev
= &client
->dev
;
268 struct act8865_platform_data
*pdata
= dev_get_platdata(dev
);
269 struct regulator_config config
= { };
270 struct act8865
*act8865
;
271 struct device_node
*of_node
[ACT8865_REG_NUM
];
276 if (dev
->of_node
&& !pdata
) {
277 const struct of_device_id
*id
;
278 struct act8865_platform_data pdata_of
;
280 id
= of_match_device(of_match_ptr(act8865_dt_ids
), dev
);
284 ret
= act8865_pdata_from_dt(dev
, of_node
, &pdata_of
);
291 if (pdata
->num_regulators
> ACT8865_REG_NUM
) {
292 dev_err(dev
, "Too many regulators found!\n");
296 act8865
= devm_kzalloc(dev
, sizeof(struct act8865
) +
297 sizeof(struct regulator_dev
*) * ACT8865_REG_NUM
,
302 rdev
= act8865
->rdev
;
304 act8865
->regmap
= devm_regmap_init_i2c(client
, &act8865_regmap_config
);
305 if (IS_ERR(act8865
->regmap
)) {
306 error
= PTR_ERR(act8865
->regmap
);
307 dev_err(&client
->dev
, "Failed to allocate register map: %d\n",
312 /* Finally register devices */
313 for (i
= 0; i
< pdata
->num_regulators
; i
++) {
315 id
= pdata
->regulators
[i
].id
;
318 config
.init_data
= pdata
->regulators
[i
].platform_data
;
319 config
.of_node
= of_node
[i
];
320 config
.driver_data
= act8865
;
321 config
.regmap
= act8865
->regmap
;
323 rdev
[i
] = devm_regulator_register(&client
->dev
,
324 &act8865_reg
[i
], &config
);
325 if (IS_ERR(rdev
[i
])) {
326 dev_err(dev
, "failed to register %s\n",
327 act8865_reg
[id
].name
);
328 return PTR_ERR(rdev
[i
]);
332 i2c_set_clientdata(client
, act8865
);
337 static const struct i2c_device_id act8865_ids
[] = {
341 MODULE_DEVICE_TABLE(i2c
, act8865_ids
);
343 static struct i2c_driver act8865_pmic_driver
= {
346 .owner
= THIS_MODULE
,
348 .probe
= act8865_pmic_probe
,
349 .id_table
= act8865_ids
,
352 module_i2c_driver(act8865_pmic_driver
);
354 MODULE_DESCRIPTION("active-semi act8865 voltage regulator driver");
355 MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
356 MODULE_LICENSE("GPL v2");