Commit | Line | Data |
---|---|---|
5c7024ae WX |
1 | /* |
2 | * Device driver for regulators in Hi6421V530 IC | |
3 | * | |
4 | * Copyright (c) <2017> HiSilicon Technologies Co., Ltd. | |
5 | * http://www.hisilicon.com | |
6 | * Copyright (c) <2017> Linaro Ltd. | |
7 | * http://www.linaro.org | |
8 | * | |
9 | * Author: Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com> | |
10 | * Guodong Xu <guodong.xu@linaro.org> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | */ | |
16 | ||
17 | #include <linux/mfd/hi6421-pmic.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/of.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/regmap.h> | |
22 | #include <linux/regulator/driver.h> | |
23 | ||
24 | /* | |
25 | * struct hi6421v530_regulator_info - hi6421v530 regulator information | |
26 | * @desc: regulator description | |
27 | * @mode_mask: ECO mode bitmask of LDOs; for BUCKs, this masks sleep | |
28 | * @eco_microamp: eco mode load upper limit (in uA), valid for LDOs only | |
29 | */ | |
30 | struct hi6421v530_regulator_info { | |
31 | struct regulator_desc rdesc; | |
32 | u8 mode_mask; | |
33 | u32 eco_microamp; | |
34 | }; | |
35 | ||
36 | /* HI6421v530 regulators */ | |
37 | enum hi6421v530_regulator_id { | |
38 | HI6421V530_LDO3, | |
39 | HI6421V530_LDO9, | |
40 | HI6421V530_LDO11, | |
41 | HI6421V530_LDO15, | |
42 | HI6421V530_LDO16, | |
43 | }; | |
44 | ||
45 | static const unsigned int ldo_3_voltages[] = { | |
46 | 1800000, 1825000, 1850000, 1875000, | |
47 | 1900000, 1925000, 1950000, 1975000, | |
48 | 2000000, 2025000, 2050000, 2075000, | |
49 | 2100000, 2125000, 2150000, 2200000, | |
50 | }; | |
51 | ||
52 | static const unsigned int ldo_9_11_voltages[] = { | |
53 | 1750000, 1800000, 1825000, 2800000, | |
54 | 2850000, 2950000, 3000000, 3300000, | |
55 | }; | |
56 | ||
57 | static const unsigned int ldo_15_16_voltages[] = { | |
58 | 1750000, 1800000, 2400000, 2600000, | |
59 | 2700000, 2850000, 2950000, 3000000, | |
60 | }; | |
61 | ||
62 | static const struct regulator_ops hi6421v530_ldo_ops; | |
63 | ||
64 | #define HI6421V530_LDO_ENABLE_TIME (350) | |
65 | ||
66 | /* | |
67 | * _id - LDO id name string | |
68 | * v_table - voltage table | |
69 | * vreg - voltage select register | |
70 | * vmask - voltage select mask | |
71 | * ereg - enable register | |
72 | * emask - enable mask | |
73 | * odelay - off/on delay time in uS | |
74 | * ecomask - eco mode mask | |
75 | * ecoamp - eco mode load uppler limit in uA | |
76 | */ | |
77 | #define HI6421V530_LDO(_ID, v_table, vreg, vmask, ereg, emask, \ | |
78 | odelay, ecomask, ecoamp) { \ | |
79 | .rdesc = { \ | |
80 | .name = #_ID, \ | |
81 | .of_match = of_match_ptr(#_ID), \ | |
82 | .regulators_node = of_match_ptr("regulators"), \ | |
83 | .ops = &hi6421v530_ldo_ops, \ | |
84 | .type = REGULATOR_VOLTAGE, \ | |
85 | .id = HI6421V530_##_ID, \ | |
86 | .owner = THIS_MODULE, \ | |
87 | .n_voltages = ARRAY_SIZE(v_table), \ | |
88 | .volt_table = v_table, \ | |
89 | .vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \ | |
90 | .vsel_mask = vmask, \ | |
91 | .enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \ | |
92 | .enable_mask = emask, \ | |
93 | .enable_time = HI6421V530_LDO_ENABLE_TIME, \ | |
94 | .off_on_delay = odelay, \ | |
95 | }, \ | |
96 | .mode_mask = ecomask, \ | |
97 | .eco_microamp = ecoamp, \ | |
98 | } | |
99 | ||
100 | /* HI6421V530 regulator information */ | |
101 | ||
102 | static struct hi6421v530_regulator_info hi6421v530_regulator_info[] = { | |
103 | HI6421V530_LDO(LDO3, ldo_3_voltages, 0x061, 0xf, 0x060, 0x2, | |
104 | 20000, 0x6, 8000), | |
105 | HI6421V530_LDO(LDO9, ldo_9_11_voltages, 0x06b, 0x7, 0x06a, 0x2, | |
106 | 40000, 0x6, 8000), | |
107 | HI6421V530_LDO(LDO11, ldo_9_11_voltages, 0x06f, 0x7, 0x06e, 0x2, | |
108 | 40000, 0x6, 8000), | |
109 | HI6421V530_LDO(LDO15, ldo_15_16_voltages, 0x077, 0x7, 0x076, 0x2, | |
110 | 40000, 0x6, 8000), | |
111 | HI6421V530_LDO(LDO16, ldo_15_16_voltages, 0x079, 0x7, 0x078, 0x2, | |
112 | 40000, 0x6, 8000), | |
113 | }; | |
114 | ||
115 | static unsigned int hi6421v530_regulator_ldo_get_mode( | |
116 | struct regulator_dev *rdev) | |
117 | { | |
118 | struct hi6421v530_regulator_info *info; | |
119 | unsigned int reg_val; | |
120 | ||
121 | info = rdev_get_drvdata(rdev); | |
122 | regmap_read(rdev->regmap, rdev->desc->enable_reg, ®_val); | |
123 | ||
124 | if (reg_val & (info->mode_mask)) | |
125 | return REGULATOR_MODE_IDLE; | |
126 | ||
127 | return REGULATOR_MODE_NORMAL; | |
128 | } | |
129 | ||
130 | static int hi6421v530_regulator_ldo_set_mode(struct regulator_dev *rdev, | |
131 | unsigned int mode) | |
132 | { | |
133 | struct hi6421v530_regulator_info *info; | |
134 | unsigned int new_mode; | |
135 | ||
136 | info = rdev_get_drvdata(rdev); | |
137 | switch (mode) { | |
138 | case REGULATOR_MODE_NORMAL: | |
139 | new_mode = 0; | |
140 | break; | |
141 | case REGULATOR_MODE_IDLE: | |
142 | new_mode = info->mode_mask; | |
143 | break; | |
144 | default: | |
145 | return -EINVAL; | |
146 | } | |
147 | ||
148 | regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, | |
149 | info->mode_mask, new_mode); | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | ||
155 | static const struct regulator_ops hi6421v530_ldo_ops = { | |
156 | .is_enabled = regulator_is_enabled_regmap, | |
157 | .enable = regulator_enable_regmap, | |
158 | .disable = regulator_disable_regmap, | |
159 | .list_voltage = regulator_list_voltage_table, | |
160 | .map_voltage = regulator_map_voltage_ascend, | |
161 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
162 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
163 | .get_mode = hi6421v530_regulator_ldo_get_mode, | |
164 | .set_mode = hi6421v530_regulator_ldo_set_mode, | |
165 | }; | |
166 | ||
167 | static int hi6421v530_regulator_probe(struct platform_device *pdev) | |
168 | { | |
169 | struct hi6421_pmic *pmic; | |
170 | struct regulator_dev *rdev; | |
171 | struct regulator_config config = { }; | |
172 | unsigned int i; | |
173 | ||
174 | pmic = dev_get_drvdata(pdev->dev.parent); | |
175 | if (!pmic) { | |
176 | dev_err(&pdev->dev, "no pmic in the regulator parent node\n"); | |
177 | return -ENODEV; | |
178 | } | |
179 | ||
180 | for (i = 0; i < ARRAY_SIZE(hi6421v530_regulator_info); i++) { | |
181 | config.dev = pdev->dev.parent; | |
182 | config.regmap = pmic->regmap; | |
183 | config.driver_data = &hi6421v530_regulator_info[i]; | |
184 | ||
185 | rdev = devm_regulator_register(&pdev->dev, | |
186 | &hi6421v530_regulator_info[i].rdesc, | |
187 | &config); | |
188 | if (IS_ERR(rdev)) { | |
189 | dev_err(&pdev->dev, "failed to register regulator %s\n", | |
190 | hi6421v530_regulator_info[i].rdesc.name); | |
191 | return PTR_ERR(rdev); | |
192 | } | |
193 | } | |
194 | return 0; | |
195 | } | |
196 | ||
ded7b2ae GX |
197 | static const struct platform_device_id hi6421v530_regulator_table[] = { |
198 | { .name = "hi6421v530-regulator" }, | |
199 | {}, | |
200 | }; | |
201 | MODULE_DEVICE_TABLE(platform, hi6421v530_regulator_table); | |
202 | ||
5c7024ae | 203 | static struct platform_driver hi6421v530_regulator_driver = { |
ded7b2ae | 204 | .id_table = hi6421v530_regulator_table, |
5c7024ae WX |
205 | .driver = { |
206 | .name = "hi6421v530-regulator", | |
207 | }, | |
208 | .probe = hi6421v530_regulator_probe, | |
209 | }; | |
210 | module_platform_driver(hi6421v530_regulator_driver); | |
211 | ||
212 | MODULE_AUTHOR("Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>"); | |
213 | MODULE_DESCRIPTION("Hi6421v530 regulator driver"); | |
214 | MODULE_LICENSE("GPL v2"); |