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8#include <linux/module.h>
9#include <linux/platform_device.h>
10#include <linux/regulator/driver.h>
11#include <linux/mfd/max14577.h>
12#include <linux/mfd/max14577-private.h>
13#include <linux/regulator/of_regulator.h>
14
15static int max14577_reg_is_enabled(struct regulator_dev *rdev)
16{
17 int rid = rdev_get_id(rdev);
18 struct regmap *rmap = rdev->regmap;
19 u8 reg_data;
20
21 switch (rid) {
22 case MAX14577_CHARGER:
23 max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL2, ®_data);
24 if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0)
25 return 0;
26 max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, ®_data);
27 if ((reg_data & STATUS3_CGMBC_MASK) == 0)
28 return 0;
29
30 return 1;
31 default:
32 return -EINVAL;
33 }
34}
35
36static int max14577_reg_get_current_limit(struct regulator_dev *rdev)
37{
38 u8 reg_data;
39 struct regmap *rmap = rdev->regmap;
40 struct max14577 *max14577 = rdev_get_drvdata(rdev);
41 const struct maxim_charger_current *limits =
42 &maxim_charger_currents[max14577->dev_type];
43
44 if (rdev_get_id(rdev) != MAX14577_CHARGER)
45 return -EINVAL;
46
47 max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL4, ®_data);
48
49 if ((reg_data & CHGCTRL4_MBCICHWRCL_MASK) == 0)
50 return limits->min;
51
52 reg_data = ((reg_data & CHGCTRL4_MBCICHWRCH_MASK) >>
53 CHGCTRL4_MBCICHWRCH_SHIFT);
54 return limits->high_start + reg_data * limits->high_step;
55}
56
57static int max14577_reg_set_current_limit(struct regulator_dev *rdev,
58 int min_uA, int max_uA)
59{
60 u8 reg_data;
61 int ret;
62 struct max14577 *max14577 = rdev_get_drvdata(rdev);
63 const struct maxim_charger_current *limits =
64 &maxim_charger_currents[max14577->dev_type];
65
66 if (rdev_get_id(rdev) != MAX14577_CHARGER)
67 return -EINVAL;
68
69 ret = maxim_charger_calc_reg_current(limits, min_uA, max_uA, ®_data);
70 if (ret)
71 return ret;
72
73 return max14577_update_reg(rdev->regmap, MAX14577_CHG_REG_CHG_CTRL4,
74 CHGCTRL4_MBCICHWRCL_MASK | CHGCTRL4_MBCICHWRCH_MASK,
75 reg_data);
76}
77
78static const struct regulator_ops max14577_safeout_ops = {
79 .is_enabled = regulator_is_enabled_regmap,
80 .enable = regulator_enable_regmap,
81 .disable = regulator_disable_regmap,
82 .list_voltage = regulator_list_voltage_linear,
83};
84
85static const struct regulator_ops max14577_charger_ops = {
86 .is_enabled = max14577_reg_is_enabled,
87 .enable = regulator_enable_regmap,
88 .disable = regulator_disable_regmap,
89 .get_current_limit = max14577_reg_get_current_limit,
90 .set_current_limit = max14577_reg_set_current_limit,
91};
92
93#define MAX14577_SAFEOUT_REG { \
94 .name = "SAFEOUT", \
95 .of_match = of_match_ptr("SAFEOUT"), \
96 .regulators_node = of_match_ptr("regulators"), \
97 .id = MAX14577_SAFEOUT, \
98 .ops = &max14577_safeout_ops, \
99 .type = REGULATOR_VOLTAGE, \
100 .owner = THIS_MODULE, \
101 .n_voltages = 1, \
102 .min_uV = MAX14577_REGULATOR_SAFEOUT_VOLTAGE, \
103 .enable_reg = MAX14577_REG_CONTROL2, \
104 .enable_mask = CTRL2_SFOUTORD_MASK, \
105}
106#define MAX14577_CHARGER_REG { \
107 .name = "CHARGER", \
108 .of_match = of_match_ptr("CHARGER"), \
109 .regulators_node = of_match_ptr("regulators"), \
110 .id = MAX14577_CHARGER, \
111 .ops = &max14577_charger_ops, \
112 .type = REGULATOR_CURRENT, \
113 .owner = THIS_MODULE, \
114 .enable_reg = MAX14577_CHG_REG_CHG_CTRL2, \
115 .enable_mask = CHGCTRL2_MBCHOSTEN_MASK, \
116}
117
118static const struct regulator_desc max14577_supported_regulators[] = {
119 [MAX14577_SAFEOUT] = MAX14577_SAFEOUT_REG,
120 [MAX14577_CHARGER] = MAX14577_CHARGER_REG,
121};
122
123static const struct regulator_ops max77836_ldo_ops = {
124 .is_enabled = regulator_is_enabled_regmap,
125 .enable = regulator_enable_regmap,
126 .disable = regulator_disable_regmap,
127 .list_voltage = regulator_list_voltage_linear,
128 .map_voltage = regulator_map_voltage_linear,
129 .get_voltage_sel = regulator_get_voltage_sel_regmap,
130 .set_voltage_sel = regulator_set_voltage_sel_regmap,
131
132};
133
134#define MAX77836_LDO_REG(num) { \
135 .name = "LDO" # num, \
136 .of_match = of_match_ptr("LDO" # num), \
137 .regulators_node = of_match_ptr("regulators"), \
138 .id = MAX77836_LDO ## num, \
139 .ops = &max77836_ldo_ops, \
140 .type = REGULATOR_VOLTAGE, \
141 .owner = THIS_MODULE, \
142 .n_voltages = MAX77836_REGULATOR_LDO_VOLTAGE_STEPS_NUM, \
143 .min_uV = MAX77836_REGULATOR_LDO_VOLTAGE_MIN, \
144 .uV_step = MAX77836_REGULATOR_LDO_VOLTAGE_STEP, \
145 .enable_reg = MAX77836_LDO_REG_CNFG1_LDO ## num, \
146 .enable_mask = MAX77836_CNFG1_LDO_PWRMD_MASK, \
147 .vsel_reg = MAX77836_LDO_REG_CNFG1_LDO ## num, \
148 .vsel_mask = MAX77836_CNFG1_LDO_TV_MASK, \
149}
150
151static const struct regulator_desc max77836_supported_regulators[] = {
152 [MAX14577_SAFEOUT] = MAX14577_SAFEOUT_REG,
153 [MAX14577_CHARGER] = MAX14577_CHARGER_REG,
154 [MAX77836_LDO1] = MAX77836_LDO_REG(1),
155 [MAX77836_LDO2] = MAX77836_LDO_REG(2),
156};
157
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163
164static struct regmap *max14577_get_regmap(struct max14577 *max14577,
165 int reg_id)
166{
167 switch (max14577->dev_type) {
168 case MAXIM_DEVICE_TYPE_MAX77836:
169 switch (reg_id) {
170 case MAX77836_SAFEOUT ... MAX77836_CHARGER:
171 return max14577->regmap;
172 default:
173
174 return max14577->regmap_pmic;
175 }
176
177 case MAXIM_DEVICE_TYPE_MAX14577:
178 default:
179 return max14577->regmap;
180 }
181}
182
183static int max14577_regulator_probe(struct platform_device *pdev)
184{
185 struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
186 struct max14577_platform_data *pdata = dev_get_platdata(max14577->dev);
187 int i, ret = 0;
188 struct regulator_config config = {};
189 const struct regulator_desc *supported_regulators;
190 unsigned int supported_regulators_size;
191 enum maxim_device_type dev_type = max14577->dev_type;
192
193 switch (dev_type) {
194 case MAXIM_DEVICE_TYPE_MAX77836:
195 supported_regulators = max77836_supported_regulators;
196 supported_regulators_size = ARRAY_SIZE(max77836_supported_regulators);
197 break;
198 case MAXIM_DEVICE_TYPE_MAX14577:
199 default:
200 supported_regulators = max14577_supported_regulators;
201 supported_regulators_size = ARRAY_SIZE(max14577_supported_regulators);
202 }
203
204 config.dev = max14577->dev;
205 config.driver_data = max14577;
206
207 for (i = 0; i < supported_regulators_size; i++) {
208 struct regulator_dev *regulator;
209
210
211
212
213 if (pdata && pdata->regulators) {
214 config.init_data = pdata->regulators[i].initdata;
215 config.of_node = pdata->regulators[i].of_node;
216 }
217 config.regmap = max14577_get_regmap(max14577,
218 supported_regulators[i].id);
219
220 regulator = devm_regulator_register(&pdev->dev,
221 &supported_regulators[i], &config);
222 if (IS_ERR(regulator)) {
223 ret = PTR_ERR(regulator);
224 dev_err(&pdev->dev,
225 "Regulator init failed for %d/%s with error: %d\n",
226 i, supported_regulators[i].name, ret);
227 return ret;
228 }
229 }
230
231 return ret;
232}
233
234static const struct platform_device_id max14577_regulator_id[] = {
235 { "max14577-regulator", MAXIM_DEVICE_TYPE_MAX14577, },
236 { "max77836-regulator", MAXIM_DEVICE_TYPE_MAX77836, },
237 { }
238};
239MODULE_DEVICE_TABLE(platform, max14577_regulator_id);
240
241static struct platform_driver max14577_regulator_driver = {
242 .driver = {
243 .name = "max14577-regulator",
244 },
245 .probe = max14577_regulator_probe,
246 .id_table = max14577_regulator_id,
247};
248
249static int __init max14577_regulator_init(void)
250{
251 BUILD_BUG_ON(ARRAY_SIZE(max14577_supported_regulators) != MAX14577_REGULATOR_NUM);
252 BUILD_BUG_ON(ARRAY_SIZE(max77836_supported_regulators) != MAX77836_REGULATOR_NUM);
253
254 BUILD_BUG_ON(MAX77836_REGULATOR_LDO_VOLTAGE_MIN +
255 (MAX77836_REGULATOR_LDO_VOLTAGE_STEP *
256 (MAX77836_REGULATOR_LDO_VOLTAGE_STEPS_NUM - 1)) !=
257 MAX77836_REGULATOR_LDO_VOLTAGE_MAX);
258
259 return platform_driver_register(&max14577_regulator_driver);
260}
261subsys_initcall(max14577_regulator_init);
262
263static void __exit max14577_regulator_exit(void)
264{
265 platform_driver_unregister(&max14577_regulator_driver);
266}
267module_exit(max14577_regulator_exit);
268
269MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
270MODULE_DESCRIPTION("Maxim 14577/77836 regulator driver");
271MODULE_LICENSE("GPL");
272
