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452534e5 VB |
1 | /* |
2 | * Regulator driver for tps65090 power management chip. | |
3 | * | |
4 | * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. | |
5 | ||
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, as published by the Free Software Foundation. | |
9 | ||
10 | * This program is distributed in the hope it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | ||
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program. If not, see <http://www.gnu.org/licenses/> | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
452534e5 VB |
20 | #include <linux/init.h> |
21 | #include <linux/slab.h> | |
22 | #include <linux/err.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <linux/regulator/driver.h> | |
25 | #include <linux/regulator/machine.h> | |
26 | #include <linux/mfd/tps65090.h> | |
27 | #include <linux/regulator/tps65090-regulator.h> | |
28 | ||
29 | struct tps65090_regulator { | |
30 | int id; | |
452534e5 VB |
31 | /* used by regulator core */ |
32 | struct regulator_desc desc; | |
33 | ||
34 | /* Device */ | |
35 | struct device *dev; | |
36 | }; | |
37 | ||
452534e5 | 38 | static struct regulator_ops tps65090_ops = { |
06c4998b AL |
39 | .enable = regulator_enable_regmap, |
40 | .disable = regulator_disable_regmap, | |
41 | .is_enabled = regulator_is_enabled_regmap, | |
452534e5 VB |
42 | }; |
43 | ||
4b3bd55f | 44 | #define tps65090_REG(_id) \ |
452534e5 | 45 | { \ |
452534e5 VB |
46 | .id = TPS65090_ID_##_id, \ |
47 | .desc = { \ | |
48 | .name = tps65090_rails(_id), \ | |
49 | .id = TPS65090_ID_##_id, \ | |
4b3bd55f | 50 | .ops = &tps65090_ops, \ |
452534e5 VB |
51 | .type = REGULATOR_VOLTAGE, \ |
52 | .owner = THIS_MODULE, \ | |
06c4998b AL |
53 | .enable_reg = (TPS65090_ID_##_id) + 12, \ |
54 | .enable_mask = BIT(0), \ | |
452534e5 VB |
55 | }, \ |
56 | } | |
57 | ||
58 | static struct tps65090_regulator TPS65090_regulator[] = { | |
4b3bd55f AL |
59 | tps65090_REG(DCDC1), |
60 | tps65090_REG(DCDC2), | |
61 | tps65090_REG(DCDC3), | |
62 | tps65090_REG(FET1), | |
63 | tps65090_REG(FET2), | |
64 | tps65090_REG(FET3), | |
65 | tps65090_REG(FET4), | |
66 | tps65090_REG(FET5), | |
67 | tps65090_REG(FET6), | |
68 | tps65090_REG(FET7), | |
452534e5 VB |
69 | }; |
70 | ||
71 | static inline struct tps65090_regulator *find_regulator_info(int id) | |
72 | { | |
73 | struct tps65090_regulator *ri; | |
74 | int i; | |
75 | ||
76 | for (i = 0; i < ARRAY_SIZE(TPS65090_regulator); i++) { | |
77 | ri = &TPS65090_regulator[i]; | |
78 | if (ri->desc.id == id) | |
79 | return ri; | |
80 | } | |
81 | return NULL; | |
82 | } | |
83 | ||
84 | static int __devinit tps65090_regulator_probe(struct platform_device *pdev) | |
85 | { | |
06c4998b | 86 | struct tps65090 *tps65090_mfd = dev_get_drvdata(pdev->dev.parent); |
452534e5 | 87 | struct tps65090_regulator *ri = NULL; |
c172708d | 88 | struct regulator_config config = { }; |
452534e5 VB |
89 | struct regulator_dev *rdev; |
90 | struct tps65090_regulator_platform_data *tps_pdata; | |
91 | int id = pdev->id; | |
92 | ||
93 | dev_dbg(&pdev->dev, "Probing regulator %d\n", id); | |
94 | ||
95 | ri = find_regulator_info(id); | |
96 | if (ri == NULL) { | |
97 | dev_err(&pdev->dev, "invalid regulator ID specified\n"); | |
98 | return -EINVAL; | |
99 | } | |
100 | tps_pdata = pdev->dev.platform_data; | |
101 | ri->dev = &pdev->dev; | |
102 | ||
c172708d MB |
103 | config.dev = &pdev->dev; |
104 | config.init_data = &tps_pdata->regulator; | |
105 | config.driver_data = ri; | |
06c4998b | 106 | config.regmap = tps65090_mfd->rmap; |
c172708d MB |
107 | |
108 | rdev = regulator_register(&ri->desc, &config); | |
0ca2d6e6 | 109 | if (IS_ERR(rdev)) { |
452534e5 VB |
110 | dev_err(&pdev->dev, "failed to register regulator %s\n", |
111 | ri->desc.name); | |
112 | return PTR_ERR(rdev); | |
113 | } | |
114 | ||
115 | platform_set_drvdata(pdev, rdev); | |
116 | return 0; | |
117 | } | |
118 | ||
119 | static int __devexit tps65090_regulator_remove(struct platform_device *pdev) | |
120 | { | |
121 | struct regulator_dev *rdev = platform_get_drvdata(pdev); | |
122 | ||
123 | regulator_unregister(rdev); | |
124 | return 0; | |
125 | } | |
126 | ||
127 | static struct platform_driver tps65090_regulator_driver = { | |
128 | .driver = { | |
129 | .name = "tps65090-regulator", | |
130 | .owner = THIS_MODULE, | |
131 | }, | |
132 | .probe = tps65090_regulator_probe, | |
133 | .remove = __devexit_p(tps65090_regulator_remove), | |
134 | }; | |
135 | ||
136 | static int __init tps65090_regulator_init(void) | |
137 | { | |
138 | return platform_driver_register(&tps65090_regulator_driver); | |
139 | } | |
140 | subsys_initcall(tps65090_regulator_init); | |
141 | ||
142 | static void __exit tps65090_regulator_exit(void) | |
143 | { | |
144 | platform_driver_unregister(&tps65090_regulator_driver); | |
145 | } | |
146 | module_exit(tps65090_regulator_exit); | |
147 | ||
148 | MODULE_DESCRIPTION("tps65090 regulator driver"); | |
149 | MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>"); | |
150 | MODULE_LICENSE("GPL v2"); |