Merge tag 'dmaengine-4.11-rc1' of git://git.infradead.org/users/vkoul/slave-dma
[linux-2.6-block.git] / drivers / regulator / hi655x-regulator.c
1 /*
2  * Device driver for regulators in Hi655x IC
3  *
4  * Copyright (c) 2016 Hisilicon.
5  *
6  * Authors:
7  * Chen Feng <puck.chen@hisilicon.com>
8  * Fei  Wang <w.f@huawei.com>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software Foundation.
13  */
14
15 #include <linux/bitops.h>
16 #include <linux/device.h>
17 #include <linux/err.h>
18 #include <linux/module.h>
19 #include <linux/io.h>
20 #include <linux/of.h>
21 #include <linux/platform_device.h>
22 #include <linux/regmap.h>
23 #include <linux/regulator/driver.h>
24 #include <linux/regulator/machine.h>
25 #include <linux/regulator/of_regulator.h>
26 #include <linux/mfd/hi655x-pmic.h>
27
28 struct hi655x_regulator {
29         unsigned int disable_reg;
30         unsigned int status_reg;
31         unsigned int ctrl_regs;
32         unsigned int ctrl_mask;
33         struct regulator_desc rdesc;
34 };
35
36 /* LDO7 & LDO10 */
37 static const unsigned int ldo7_voltages[] = {
38         1800000, 1850000, 2850000, 2900000,
39         3000000, 3100000, 3200000, 3300000,
40 };
41
42 static const unsigned int ldo19_voltages[] = {
43         1800000, 1850000, 1900000, 1750000,
44         2800000, 2850000, 2900000, 3000000,
45 };
46
47 static const unsigned int ldo22_voltages[] = {
48          900000, 1000000, 1050000, 1100000,
49         1150000, 1175000, 1185000, 1200000,
50 };
51
52 enum hi655x_regulator_id {
53         HI655X_LDO0,
54         HI655X_LDO1,
55         HI655X_LDO2,
56         HI655X_LDO3,
57         HI655X_LDO4,
58         HI655X_LDO5,
59         HI655X_LDO6,
60         HI655X_LDO7,
61         HI655X_LDO8,
62         HI655X_LDO9,
63         HI655X_LDO10,
64         HI655X_LDO11,
65         HI655X_LDO12,
66         HI655X_LDO13,
67         HI655X_LDO14,
68         HI655X_LDO15,
69         HI655X_LDO16,
70         HI655X_LDO17,
71         HI655X_LDO18,
72         HI655X_LDO19,
73         HI655X_LDO20,
74         HI655X_LDO21,
75         HI655X_LDO22,
76 };
77
78 static int hi655x_is_enabled(struct regulator_dev *rdev)
79 {
80         unsigned int value = 0;
81
82         struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
83
84         regmap_read(rdev->regmap, regulator->status_reg, &value);
85         return (value & BIT(regulator->ctrl_mask));
86 }
87
88 static int hi655x_disable(struct regulator_dev *rdev)
89 {
90         int ret = 0;
91
92         struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);
93
94         ret = regmap_write(rdev->regmap, regulator->disable_reg,
95                            BIT(regulator->ctrl_mask));
96         return ret;
97 }
98
99 static const struct regulator_ops hi655x_regulator_ops = {
100         .enable = regulator_enable_regmap,
101         .disable = hi655x_disable,
102         .is_enabled = hi655x_is_enabled,
103         .list_voltage = regulator_list_voltage_table,
104         .get_voltage_sel = regulator_get_voltage_sel_regmap,
105         .set_voltage_sel = regulator_set_voltage_sel_regmap,
106 };
107
108 static const struct regulator_ops hi655x_ldo_linear_ops = {
109         .enable = regulator_enable_regmap,
110         .disable = hi655x_disable,
111         .is_enabled = hi655x_is_enabled,
112         .list_voltage = regulator_list_voltage_linear,
113         .get_voltage_sel = regulator_get_voltage_sel_regmap,
114         .set_voltage_sel = regulator_set_voltage_sel_regmap,
115 };
116
117 #define HI655X_LDO(_ID, vreg, vmask, ereg, dreg,                 \
118                    sreg, cmask, vtable) {                        \
119         .rdesc = {                                               \
120                 .name            = #_ID,                         \
121                 .of_match        = of_match_ptr(#_ID),           \
122                 .ops             = &hi655x_regulator_ops,        \
123                 .regulators_node = of_match_ptr("regulators"),   \
124                 .type            = REGULATOR_VOLTAGE,            \
125                 .id              = HI655X_##_ID,                 \
126                 .owner           = THIS_MODULE,                  \
127                 .n_voltages      = ARRAY_SIZE(vtable),           \
128                 .volt_table      = vtable,                       \
129                 .vsel_reg        = HI655X_BUS_ADDR(vreg),        \
130                 .vsel_mask       = vmask,                        \
131                 .enable_reg      = HI655X_BUS_ADDR(ereg),        \
132                 .enable_mask     = BIT(cmask),                   \
133         },                                                       \
134         .disable_reg = HI655X_BUS_ADDR(dreg),                    \
135         .status_reg = HI655X_BUS_ADDR(sreg),                     \
136         .ctrl_mask = cmask,                                      \
137 }
138
139 #define HI655X_LDO_LINEAR(_ID, vreg, vmask, ereg, dreg,          \
140                           sreg, cmask, minv, nvolt, vstep) {     \
141         .rdesc = {                                               \
142                 .name            = #_ID,                         \
143                 .of_match        = of_match_ptr(#_ID),           \
144                 .ops             = &hi655x_ldo_linear_ops,       \
145                 .regulators_node = of_match_ptr("regulators"),   \
146                 .type            = REGULATOR_VOLTAGE,            \
147                 .id              = HI655X_##_ID,                 \
148                 .owner           = THIS_MODULE,                  \
149                 .min_uV          = minv,                         \
150                 .n_voltages      = nvolt,                        \
151                 .uV_step         = vstep,                        \
152                 .vsel_reg        = HI655X_BUS_ADDR(vreg),        \
153                 .vsel_mask       = vmask,                        \
154                 .enable_reg      = HI655X_BUS_ADDR(ereg),        \
155                 .enable_mask     = BIT(cmask),                   \
156         },                                                       \
157         .disable_reg = HI655X_BUS_ADDR(dreg),                    \
158         .status_reg = HI655X_BUS_ADDR(sreg),                     \
159         .ctrl_mask = cmask,                                      \
160 }
161
162 static struct hi655x_regulator regulators[] = {
163         HI655X_LDO_LINEAR(LDO2, 0x72, 0x07, 0x29, 0x2a, 0x2b, 0x01,
164                           2500000, 8, 100000),
165         HI655X_LDO(LDO7, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x06, ldo7_voltages),
166         HI655X_LDO(LDO10, 0x78, 0x07, 0x29, 0x2a, 0x2b, 0x01, ldo7_voltages),
167         HI655X_LDO_LINEAR(LDO13, 0x7e, 0x07, 0x2c, 0x2d, 0x2e, 0x04,
168                           1600000, 8, 50000),
169         HI655X_LDO_LINEAR(LDO14, 0x7f, 0x07, 0x2c, 0x2d, 0x2e, 0x05,
170                           2500000, 8, 100000),
171         HI655X_LDO_LINEAR(LDO15, 0x80, 0x07, 0x2c, 0x2d, 0x2e, 0x06,
172                           1600000, 8, 50000),
173         HI655X_LDO_LINEAR(LDO17, 0x82, 0x07, 0x2f, 0x30, 0x31, 0x00,
174                           2500000, 8, 100000),
175         HI655X_LDO(LDO19, 0x84, 0x07, 0x2f, 0x30, 0x31, 0x02, ldo19_voltages),
176         HI655X_LDO_LINEAR(LDO21, 0x86, 0x07, 0x2f, 0x30, 0x31, 0x04,
177                           1650000, 8, 50000),
178         HI655X_LDO(LDO22, 0x87, 0x07, 0x2f, 0x30, 0x31, 0x05, ldo22_voltages),
179 };
180
181 static int hi655x_regulator_probe(struct platform_device *pdev)
182 {
183         unsigned int i;
184         struct hi655x_regulator *regulator;
185         struct hi655x_pmic *pmic;
186         struct regulator_config config = { };
187         struct regulator_dev *rdev;
188
189         pmic = dev_get_drvdata(pdev->dev.parent);
190         if (!pmic) {
191                 dev_err(&pdev->dev, "no pmic in the regulator parent node\n");
192                 return -ENODEV;
193         }
194
195         regulator = devm_kzalloc(&pdev->dev, sizeof(*regulator), GFP_KERNEL);
196         if (!regulator)
197                 return -ENOMEM;
198
199         platform_set_drvdata(pdev, regulator);
200
201         config.dev = pdev->dev.parent;
202         config.regmap = pmic->regmap;
203         config.driver_data = regulator;
204         for (i = 0; i < ARRAY_SIZE(regulators); i++) {
205                 rdev = devm_regulator_register(&pdev->dev,
206                                                &regulators[i].rdesc,
207                                                &config);
208                 if (IS_ERR(rdev)) {
209                         dev_err(&pdev->dev, "failed to register regulator %s\n",
210                                 regulator->rdesc.name);
211                         return PTR_ERR(rdev);
212                 }
213         }
214         return 0;
215 }
216
217 static struct platform_driver hi655x_regulator_driver = {
218         .driver = {
219                 .name   = "hi655x-regulator",
220         },
221         .probe  = hi655x_regulator_probe,
222 };
223 module_platform_driver(hi655x_regulator_driver);
224
225 MODULE_AUTHOR("Chen Feng <puck.chen@hisilicon.com>");
226 MODULE_DESCRIPTION("Hisilicon Hi655x regulator driver");
227 MODULE_LICENSE("GPL v2");