Merge tag 'dmaengine-fix-5.2' of git://git.infradead.org/users/vkoul/slave-dma
[linux-2.6-microblaze.git] / drivers / regulator / hi655x-regulator.c
1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Device driver for regulators in Hi655x IC
4 //
5 // Copyright (c) 2016 Hisilicon.
6 //
7 // Authors:
8 // Chen Feng <puck.chen@hisilicon.com>
9 // Fei  Wang <w.f@huawei.com>
10
11 #include <linux/bitops.h>
12 #include <linux/device.h>
13 #include <linux/err.h>
14 #include <linux/module.h>
15 #include <linux/io.h>
16 #include <linux/of.h>
17 #include <linux/platform_device.h>
18 #include <linux/regmap.h>
19 #include <linux/regulator/driver.h>
20 #include <linux/regulator/machine.h>
21 #include <linux/regulator/of_regulator.h>
22 #include <linux/mfd/hi655x-pmic.h>
23
24 struct hi655x_regulator {
25         unsigned int disable_reg;
26         unsigned int status_reg;
27         struct regulator_desc rdesc;
28 };
29
30 /* LDO7 & LDO10 */
31 static const unsigned int ldo7_voltages[] = {
32         1800000, 1850000, 2850000, 2900000,
33         3000000, 3100000, 3200000, 3300000,
34 };
35
36 static const unsigned int ldo19_voltages[] = {
37         1800000, 1850000, 1900000, 1750000,
38         2800000, 2850000, 2900000, 3000000,
39 };
40
41 static const unsigned int ldo22_voltages[] = {
42          900000, 1000000, 1050000, 1100000,
43         1150000, 1175000, 1185000, 1200000,
44 };
45
46 enum hi655x_regulator_id {
47         HI655X_LDO0,
48         HI655X_LDO1,
49         HI655X_LDO2,
50         HI655X_LDO3,
51         HI655X_LDO4,
52         HI655X_LDO5,
53         HI655X_LDO6,
54         HI655X_LDO7,
55         HI655X_LDO8,
56         HI655X_LDO9,
57         HI655X_LDO10,
58         HI655X_LDO11,
59         HI655X_LDO12,
60         HI655X_LDO13,
61         HI655X_LDO14,
62         HI655X_LDO15,
63         HI655X_LDO16,
64         HI655X_LDO17,
65         HI655X_LDO18,
66         HI655X_LDO19,
67         HI655X_LDO20,
68         HI655X_LDO21,
69         HI655X_LDO22,
70 };
71
72 static int hi655x_is_enabled(struct regulator_dev *rdev)
73 {
74         unsigned int value = 0;
75         struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
76
77         regmap_read(rdev->regmap, regulator->status_reg, &value);
78         return (value & rdev->desc->enable_mask);
79 }
80
81 static int hi655x_disable(struct regulator_dev *rdev)
82 {
83         struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
84
85         return regmap_write(rdev->regmap, regulator->disable_reg,
86                             rdev->desc->enable_mask);
87 }
88
89 static const struct regulator_ops hi655x_regulator_ops = {
90         .enable = regulator_enable_regmap,
91         .disable = hi655x_disable,
92         .is_enabled = hi655x_is_enabled,
93         .list_voltage = regulator_list_voltage_table,
94         .get_voltage_sel = regulator_get_voltage_sel_regmap,
95         .set_voltage_sel = regulator_set_voltage_sel_regmap,
96 };
97
98 static const struct regulator_ops hi655x_ldo_linear_ops = {
99         .enable = regulator_enable_regmap,
100         .disable = hi655x_disable,
101         .is_enabled = hi655x_is_enabled,
102         .list_voltage = regulator_list_voltage_linear,
103         .get_voltage_sel = regulator_get_voltage_sel_regmap,
104         .set_voltage_sel = regulator_set_voltage_sel_regmap,
105 };
106
107 #define HI655X_LDO(_ID, vreg, vmask, ereg, dreg,                 \
108                    sreg, cmask, vtable) {                        \
109         .rdesc = {                                               \
110                 .name            = #_ID,                         \
111                 .of_match        = of_match_ptr(#_ID),           \
112                 .ops             = &hi655x_regulator_ops,        \
113                 .regulators_node = of_match_ptr("regulators"),   \
114                 .type            = REGULATOR_VOLTAGE,            \
115                 .id              = HI655X_##_ID,                 \
116                 .owner           = THIS_MODULE,                  \
117                 .n_voltages      = ARRAY_SIZE(vtable),           \
118                 .volt_table      = vtable,                       \
119                 .vsel_reg        = HI655X_BUS_ADDR(vreg),        \
120                 .vsel_mask       = vmask,                        \
121                 .enable_reg      = HI655X_BUS_ADDR(ereg),        \
122                 .enable_mask     = BIT(cmask),                   \
123         },                                                       \
124         .disable_reg = HI655X_BUS_ADDR(dreg),                    \
125         .status_reg = HI655X_BUS_ADDR(sreg),                     \
126 }
127
128 #define HI655X_LDO_LINEAR(_ID, vreg, vmask, ereg, dreg,          \
129                           sreg, cmask, minv, nvolt, vstep) {     \
130         .rdesc = {                                               \
131                 .name            = #_ID,                         \
132                 .of_match        = of_match_ptr(#_ID),           \
133                 .ops             = &hi655x_ldo_linear_ops,       \
134                 .regulators_node = of_match_ptr("regulators"),   \
135                 .type            = REGULATOR_VOLTAGE,            \
136                 .id              = HI655X_##_ID,                 \
137                 .owner           = THIS_MODULE,                  \
138                 .min_uV          = minv,                         \
139                 .n_voltages      = nvolt,                        \
140                 .uV_step         = vstep,                        \
141                 .vsel_reg        = HI655X_BUS_ADDR(vreg),        \
142                 .vsel_mask       = vmask,                        \
143                 .enable_reg      = HI655X_BUS_ADDR(ereg),        \
144                 .enable_mask     = BIT(cmask),                   \
145         },                                                       \
146         .disable_reg = HI655X_BUS_ADDR(dreg),                    \
147         .status_reg = HI655X_BUS_ADDR(sreg),                     \
148 }
149
150 static const struct hi655x_regulator regulators[] = {
151         HI655X_LDO_LINEAR(LDO2, 0x72, 0x07, 0x29, 0x2a, 0x2b, 0x01,
152                           2500000, 8, 100000),
153         HI655X_LDO(LDO7, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x06, ldo7_voltages),
154         HI655X_LDO(LDO10, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x01, ldo7_voltages),
155         HI655X_LDO_LINEAR(LDO13, 0x7e, 0x07, 0x2c, 0x2d, 0x2e, 0x04,
156                           1600000, 8, 50000),
157         HI655X_LDO_LINEAR(LDO14, 0x7f, 0x07, 0x2c, 0x2d, 0x2e, 0x05,
158                           2500000, 8, 100000),
159         HI655X_LDO_LINEAR(LDO15, 0x80, 0x07, 0x2c, 0x2d, 0x2e, 0x06,
160                           1600000, 8, 50000),
161         HI655X_LDO_LINEAR(LDO17, 0x82, 0x07, 0x2f, 0x30, 0x31, 0x00,
162                           2500000, 8, 100000),
163         HI655X_LDO(LDO19, 0x84, 0x07, 0x2f, 0x30, 0x31, 0x02, ldo19_voltages),
164         HI655X_LDO_LINEAR(LDO21, 0x86, 0x07, 0x2f, 0x30, 0x31, 0x04,
165                           1650000, 8, 50000),
166         HI655X_LDO(LDO22, 0x87, 0x07, 0x2f, 0x30, 0x31, 0x05, ldo22_voltages),
167 };
168
169 static int hi655x_regulator_probe(struct platform_device *pdev)
170 {
171         unsigned int i;
172         struct hi655x_regulator *regulator;
173         struct hi655x_pmic *pmic;
174         struct regulator_config config = { };
175         struct regulator_dev *rdev;
176
177         pmic = dev_get_drvdata(pdev->dev.parent);
178         if (!pmic) {
179                 dev_err(&pdev->dev, "no pmic in the regulator parent node\n");
180                 return -ENODEV;
181         }
182
183         regulator = devm_kzalloc(&pdev->dev, sizeof(*regulator), GFP_KERNEL);
184         if (!regulator)
185                 return -ENOMEM;
186
187         platform_set_drvdata(pdev, regulator);
188
189         config.dev = pdev->dev.parent;
190         config.regmap = pmic->regmap;
191         config.driver_data = regulator;
192         for (i = 0; i < ARRAY_SIZE(regulators); i++) {
193                 rdev = devm_regulator_register(&pdev->dev,
194                                                &regulators[i].rdesc,
195                                                &config);
196                 if (IS_ERR(rdev)) {
197                         dev_err(&pdev->dev, "failed to register regulator %s\n",
198                                 regulator->rdesc.name);
199                         return PTR_ERR(rdev);
200                 }
201         }
202         return 0;
203 }
204
205 static const struct platform_device_id hi655x_regulator_table[] = {
206         { .name = "hi655x-regulator" },
207         {},
208 };
209 MODULE_DEVICE_TABLE(platform, hi655x_regulator_table);
210
211 static struct platform_driver hi655x_regulator_driver = {
212         .id_table = hi655x_regulator_table,
213         .driver = {
214                 .name   = "hi655x-regulator",
215         },
216         .probe  = hi655x_regulator_probe,
217 };
218 module_platform_driver(hi655x_regulator_driver);
219
220 MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>");
221 MODULE_DESCRIPTION("Hisilicon Hi655x regulator driver");
222 MODULE_LICENSE("GPL v2");