Commit | Line | Data |
---|---|---|
2b27bdcc | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f7eb6c5e JP |
2 | /* |
3 | * linux/drivers/regulator/aat2870-regulator.c | |
4 | * | |
5 | * Copyright (c) 2011, NVIDIA Corporation. | |
6 | * Author: Jin Park <jinyoungp@nvidia.com> | |
f7eb6c5e JP |
7 | */ |
8 | ||
9 | #include <linux/kernel.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/err.h> | |
3a7d021b | 12 | #include <linux/module.h> |
f7eb6c5e | 13 | #include <linux/slab.h> |
f7eb6c5e JP |
14 | #include <linux/platform_device.h> |
15 | #include <linux/regulator/driver.h> | |
16 | #include <linux/regulator/machine.h> | |
17 | #include <linux/mfd/aat2870.h> | |
18 | ||
19 | struct aat2870_regulator { | |
b21bcd1a | 20 | struct aat2870_data *aat2870; |
f7eb6c5e JP |
21 | struct regulator_desc desc; |
22 | ||
f7eb6c5e JP |
23 | u8 enable_addr; |
24 | u8 enable_shift; | |
25 | u8 enable_mask; | |
26 | ||
27 | u8 voltage_addr; | |
28 | u8 voltage_shift; | |
29 | u8 voltage_mask; | |
30 | }; | |
31 | ||
f7eb6c5e JP |
32 | static int aat2870_ldo_set_voltage_sel(struct regulator_dev *rdev, |
33 | unsigned selector) | |
34 | { | |
35 | struct aat2870_regulator *ri = rdev_get_drvdata(rdev); | |
b21bcd1a | 36 | struct aat2870_data *aat2870 = ri->aat2870; |
f7eb6c5e JP |
37 | |
38 | return aat2870->update(aat2870, ri->voltage_addr, ri->voltage_mask, | |
a5228d2e | 39 | selector << ri->voltage_shift); |
f7eb6c5e JP |
40 | } |
41 | ||
42 | static int aat2870_ldo_get_voltage_sel(struct regulator_dev *rdev) | |
43 | { | |
44 | struct aat2870_regulator *ri = rdev_get_drvdata(rdev); | |
b21bcd1a | 45 | struct aat2870_data *aat2870 = ri->aat2870; |
f7eb6c5e JP |
46 | u8 val; |
47 | int ret; | |
48 | ||
49 | ret = aat2870->read(aat2870, ri->voltage_addr, &val); | |
50 | if (ret) | |
51 | return ret; | |
52 | ||
53 | return (val & ri->voltage_mask) >> ri->voltage_shift; | |
54 | } | |
55 | ||
56 | static int aat2870_ldo_enable(struct regulator_dev *rdev) | |
57 | { | |
58 | struct aat2870_regulator *ri = rdev_get_drvdata(rdev); | |
b21bcd1a | 59 | struct aat2870_data *aat2870 = ri->aat2870; |
f7eb6c5e JP |
60 | |
61 | return aat2870->update(aat2870, ri->enable_addr, ri->enable_mask, | |
62 | ri->enable_mask); | |
63 | } | |
64 | ||
65 | static int aat2870_ldo_disable(struct regulator_dev *rdev) | |
66 | { | |
67 | struct aat2870_regulator *ri = rdev_get_drvdata(rdev); | |
b21bcd1a | 68 | struct aat2870_data *aat2870 = ri->aat2870; |
f7eb6c5e JP |
69 | |
70 | return aat2870->update(aat2870, ri->enable_addr, ri->enable_mask, 0); | |
71 | } | |
72 | ||
73 | static int aat2870_ldo_is_enabled(struct regulator_dev *rdev) | |
74 | { | |
75 | struct aat2870_regulator *ri = rdev_get_drvdata(rdev); | |
b21bcd1a | 76 | struct aat2870_data *aat2870 = ri->aat2870; |
f7eb6c5e JP |
77 | u8 val; |
78 | int ret; | |
79 | ||
80 | ret = aat2870->read(aat2870, ri->enable_addr, &val); | |
81 | if (ret) | |
82 | return ret; | |
83 | ||
84 | return val & ri->enable_mask ? 1 : 0; | |
85 | } | |
86 | ||
2abf29af | 87 | static const struct regulator_ops aat2870_ldo_ops = { |
4506c6d5 | 88 | .list_voltage = regulator_list_voltage_table, |
08d6da29 | 89 | .map_voltage = regulator_map_voltage_ascend, |
f7eb6c5e JP |
90 | .set_voltage_sel = aat2870_ldo_set_voltage_sel, |
91 | .get_voltage_sel = aat2870_ldo_get_voltage_sel, | |
92 | .enable = aat2870_ldo_enable, | |
93 | .disable = aat2870_ldo_disable, | |
94 | .is_enabled = aat2870_ldo_is_enabled, | |
95 | }; | |
96 | ||
4506c6d5 | 97 | static const unsigned int aat2870_ldo_voltages[] = { |
f7eb6c5e JP |
98 | 1200000, 1300000, 1500000, 1600000, |
99 | 1800000, 2000000, 2200000, 2500000, | |
100 | 2600000, 2700000, 2800000, 2900000, | |
101 | 3000000, 3100000, 3200000, 3300000, | |
102 | }; | |
103 | ||
104 | #define AAT2870_LDO(ids) \ | |
105 | { \ | |
106 | .desc = { \ | |
107 | .name = #ids, \ | |
108 | .id = AAT2870_ID_##ids, \ | |
109 | .n_voltages = ARRAY_SIZE(aat2870_ldo_voltages), \ | |
4506c6d5 | 110 | .volt_table = aat2870_ldo_voltages, \ |
f7eb6c5e JP |
111 | .ops = &aat2870_ldo_ops, \ |
112 | .type = REGULATOR_VOLTAGE, \ | |
113 | .owner = THIS_MODULE, \ | |
114 | }, \ | |
f7eb6c5e JP |
115 | } |
116 | ||
117 | static struct aat2870_regulator aat2870_regulators[] = { | |
118 | AAT2870_LDO(LDOA), | |
119 | AAT2870_LDO(LDOB), | |
120 | AAT2870_LDO(LDOC), | |
121 | AAT2870_LDO(LDOD), | |
122 | }; | |
123 | ||
124 | static struct aat2870_regulator *aat2870_get_regulator(int id) | |
125 | { | |
126 | struct aat2870_regulator *ri = NULL; | |
127 | int i; | |
128 | ||
129 | for (i = 0; i < ARRAY_SIZE(aat2870_regulators); i++) { | |
130 | ri = &aat2870_regulators[i]; | |
131 | if (ri->desc.id == id) | |
132 | break; | |
133 | } | |
134 | ||
d4d6373c | 135 | if (i == ARRAY_SIZE(aat2870_regulators)) |
f7eb6c5e JP |
136 | return NULL; |
137 | ||
138 | ri->enable_addr = AAT2870_LDO_EN; | |
139 | ri->enable_shift = id - AAT2870_ID_LDOA; | |
140 | ri->enable_mask = 0x1 << ri->enable_shift; | |
141 | ||
142 | ri->voltage_addr = (id - AAT2870_ID_LDOA) / 2 ? | |
143 | AAT2870_LDO_CD : AAT2870_LDO_AB; | |
144 | ri->voltage_shift = (id - AAT2870_ID_LDOA) % 2 ? 0 : 4; | |
145 | ri->voltage_mask = 0xF << ri->voltage_shift; | |
146 | ||
147 | return ri; | |
148 | } | |
149 | ||
150 | static int aat2870_regulator_probe(struct platform_device *pdev) | |
151 | { | |
152 | struct aat2870_regulator *ri; | |
e4c5288e | 153 | struct regulator_config config = { }; |
f7eb6c5e JP |
154 | struct regulator_dev *rdev; |
155 | ||
156 | ri = aat2870_get_regulator(pdev->id); | |
157 | if (!ri) { | |
158 | dev_err(&pdev->dev, "Invalid device ID, %d\n", pdev->id); | |
159 | return -EINVAL; | |
160 | } | |
b21bcd1a | 161 | ri->aat2870 = dev_get_drvdata(pdev->dev.parent); |
f7eb6c5e | 162 | |
c172708d MB |
163 | config.dev = &pdev->dev; |
164 | config.driver_data = ri; | |
dff91d0b | 165 | config.init_data = dev_get_platdata(&pdev->dev); |
c172708d | 166 | |
b1a613d5 | 167 | rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config); |
f7eb6c5e JP |
168 | if (IS_ERR(rdev)) { |
169 | dev_err(&pdev->dev, "Failed to register regulator %s\n", | |
170 | ri->desc.name); | |
171 | return PTR_ERR(rdev); | |
172 | } | |
173 | platform_set_drvdata(pdev, rdev); | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
f7eb6c5e JP |
178 | static struct platform_driver aat2870_regulator_driver = { |
179 | .driver = { | |
180 | .name = "aat2870-regulator", | |
f7eb6c5e JP |
181 | }, |
182 | .probe = aat2870_regulator_probe, | |
f7eb6c5e JP |
183 | }; |
184 | ||
185 | static int __init aat2870_regulator_init(void) | |
186 | { | |
187 | return platform_driver_register(&aat2870_regulator_driver); | |
188 | } | |
189 | subsys_initcall(aat2870_regulator_init); | |
190 | ||
191 | static void __exit aat2870_regulator_exit(void) | |
192 | { | |
193 | platform_driver_unregister(&aat2870_regulator_driver); | |
194 | } | |
195 | module_exit(aat2870_regulator_exit); | |
196 | ||
197 | MODULE_DESCRIPTION("AnalogicTech AAT2870 Regulator"); | |
198 | MODULE_LICENSE("GPL"); | |
199 | MODULE_AUTHOR("Jin Park <jinyoungp@nvidia.com>"); | |
ad9c5ffe | 200 | MODULE_ALIAS("platform:aat2870-regulator"); |