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295c08bc SH |
1 | /* |
2 | * Regulator Driver for Freescale MC13783 PMIC | |
3 | * | |
4 | * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
a10099bc | 11 | #include <linux/mfd/mc13783.h> |
295c08bc SH |
12 | #include <linux/regulator/machine.h> |
13 | #include <linux/regulator/driver.h> | |
14 | #include <linux/platform_device.h> | |
295c08bc SH |
15 | #include <linux/kernel.h> |
16 | #include <linux/init.h> | |
17 | #include <linux/err.h> | |
18 | ||
a10099bc UKK |
19 | #define MC13783_REG_SWITCHERS4 28 |
20 | #define MC13783_REG_SWITCHERS4_PLLEN (1 << 18) | |
21 | ||
22 | #define MC13783_REG_SWITCHERS5 29 | |
23 | #define MC13783_REG_SWITCHERS5_SW3EN (1 << 20) | |
24 | ||
25 | #define MC13783_REG_REGULATORMODE0 32 | |
26 | #define MC13783_REG_REGULATORMODE0_VAUDIOEN (1 << 0) | |
27 | #define MC13783_REG_REGULATORMODE0_VIOHIEN (1 << 3) | |
28 | #define MC13783_REG_REGULATORMODE0_VIOLOEN (1 << 6) | |
29 | #define MC13783_REG_REGULATORMODE0_VDIGEN (1 << 9) | |
30 | #define MC13783_REG_REGULATORMODE0_VGENEN (1 << 12) | |
31 | #define MC13783_REG_REGULATORMODE0_VRFDIGEN (1 << 15) | |
32 | #define MC13783_REG_REGULATORMODE0_VRFREFEN (1 << 18) | |
33 | #define MC13783_REG_REGULATORMODE0_VRFCPEN (1 << 21) | |
34 | ||
35 | #define MC13783_REG_REGULATORMODE1 33 | |
36 | #define MC13783_REG_REGULATORMODE1_VSIMEN (1 << 0) | |
37 | #define MC13783_REG_REGULATORMODE1_VESIMEN (1 << 3) | |
38 | #define MC13783_REG_REGULATORMODE1_VCAMEN (1 << 6) | |
39 | #define MC13783_REG_REGULATORMODE1_VRFBGEN (1 << 9) | |
40 | #define MC13783_REG_REGULATORMODE1_VVIBEN (1 << 11) | |
41 | #define MC13783_REG_REGULATORMODE1_VRF1EN (1 << 12) | |
42 | #define MC13783_REG_REGULATORMODE1_VRF2EN (1 << 15) | |
43 | #define MC13783_REG_REGULATORMODE1_VMMC1EN (1 << 18) | |
44 | #define MC13783_REG_REGULATORMODE1_VMMC2EN (1 << 21) | |
45 | ||
46 | #define MC13783_REG_POWERMISC 34 | |
47 | #define MC13783_REG_POWERMISC_GPO1EN (1 << 6) | |
48 | #define MC13783_REG_POWERMISC_GPO2EN (1 << 8) | |
49 | #define MC13783_REG_POWERMISC_GPO3EN (1 << 10) | |
50 | #define MC13783_REG_POWERMISC_GPO4EN (1 << 12) | |
51 | ||
295c08bc SH |
52 | struct mc13783_regulator { |
53 | struct regulator_desc desc; | |
54 | int reg; | |
55 | int enable_bit; | |
56 | }; | |
57 | ||
58 | static struct regulator_ops mc13783_regulator_ops; | |
59 | ||
a10099bc UKK |
60 | #define MC13783_DEFINE(prefix, _name, _reg) \ |
61 | [MC13783_ ## prefix ## _ ## _name] = { \ | |
62 | .desc = { \ | |
63 | .name = #prefix "_" #_name, \ | |
64 | .ops = &mc13783_regulator_ops, \ | |
65 | .type = REGULATOR_VOLTAGE, \ | |
66 | .id = MC13783_ ## prefix ## _ ## _name, \ | |
67 | .owner = THIS_MODULE, \ | |
68 | }, \ | |
69 | .reg = MC13783_REG_ ## _reg, \ | |
70 | .enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \ | |
71 | } | |
72 | ||
73 | #define MC13783_DEFINE_SW(_name, _reg) MC13783_DEFINE(SW, _name, _reg) | |
74 | #define MC13783_DEFINE_REGU(_name, _reg) MC13783_DEFINE(REGU, _name, _reg) | |
75 | ||
295c08bc | 76 | static struct mc13783_regulator mc13783_regulators[] = { |
a10099bc UKK |
77 | MC13783_DEFINE_SW(SW3, SWITCHERS5), |
78 | MC13783_DEFINE_SW(PLL, SWITCHERS4), | |
79 | ||
80 | MC13783_DEFINE_REGU(VAUDIO, REGULATORMODE0), | |
81 | MC13783_DEFINE_REGU(VIOHI, REGULATORMODE0), | |
82 | MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0), | |
83 | MC13783_DEFINE_REGU(VDIG, REGULATORMODE0), | |
84 | MC13783_DEFINE_REGU(VGEN, REGULATORMODE0), | |
85 | MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0), | |
86 | MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0), | |
87 | MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0), | |
88 | MC13783_DEFINE_REGU(VSIM, REGULATORMODE1), | |
89 | MC13783_DEFINE_REGU(VESIM, REGULATORMODE1), | |
90 | MC13783_DEFINE_REGU(VCAM, REGULATORMODE1), | |
91 | MC13783_DEFINE_REGU(VRFBG, REGULATORMODE1), | |
92 | MC13783_DEFINE_REGU(VVIB, REGULATORMODE1), | |
93 | MC13783_DEFINE_REGU(VRF1, REGULATORMODE1), | |
94 | MC13783_DEFINE_REGU(VRF2, REGULATORMODE1), | |
95 | MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1), | |
96 | MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1), | |
97 | MC13783_DEFINE_REGU(GPO1, POWERMISC), | |
98 | MC13783_DEFINE_REGU(GPO2, POWERMISC), | |
99 | MC13783_DEFINE_REGU(GPO3, POWERMISC), | |
100 | MC13783_DEFINE_REGU(GPO4, POWERMISC), | |
295c08bc SH |
101 | }; |
102 | ||
a10099bc | 103 | struct mc13783_regulator_priv { |
295c08bc | 104 | struct mc13783 *mc13783; |
a10099bc | 105 | struct regulator_dev *regulators[]; |
295c08bc SH |
106 | }; |
107 | ||
a10099bc | 108 | static int mc13783_regulator_enable(struct regulator_dev *rdev) |
295c08bc | 109 | { |
a10099bc | 110 | struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev); |
295c08bc | 111 | int id = rdev_get_id(rdev); |
a10099bc | 112 | int ret; |
295c08bc SH |
113 | |
114 | dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); | |
115 | ||
a10099bc UKK |
116 | mc13783_lock(priv->mc13783); |
117 | ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg, | |
295c08bc SH |
118 | mc13783_regulators[id].enable_bit, |
119 | mc13783_regulators[id].enable_bit); | |
a10099bc UKK |
120 | mc13783_unlock(priv->mc13783); |
121 | ||
122 | return ret; | |
295c08bc SH |
123 | } |
124 | ||
a10099bc | 125 | static int mc13783_regulator_disable(struct regulator_dev *rdev) |
295c08bc | 126 | { |
a10099bc | 127 | struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev); |
295c08bc | 128 | int id = rdev_get_id(rdev); |
a10099bc | 129 | int ret; |
295c08bc SH |
130 | |
131 | dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); | |
132 | ||
a10099bc UKK |
133 | mc13783_lock(priv->mc13783); |
134 | ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg, | |
295c08bc | 135 | mc13783_regulators[id].enable_bit, 0); |
a10099bc UKK |
136 | mc13783_unlock(priv->mc13783); |
137 | ||
138 | return ret; | |
295c08bc SH |
139 | } |
140 | ||
a10099bc | 141 | static int mc13783_regulator_is_enabled(struct regulator_dev *rdev) |
295c08bc | 142 | { |
a10099bc | 143 | struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev); |
295c08bc SH |
144 | int ret, id = rdev_get_id(rdev); |
145 | unsigned int val; | |
146 | ||
a10099bc | 147 | mc13783_lock(priv->mc13783); |
295c08bc | 148 | ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val); |
a10099bc UKK |
149 | mc13783_unlock(priv->mc13783); |
150 | ||
295c08bc SH |
151 | if (ret) |
152 | return ret; | |
153 | ||
154 | return (val & mc13783_regulators[id].enable_bit) != 0; | |
155 | } | |
156 | ||
157 | static struct regulator_ops mc13783_regulator_ops = { | |
a10099bc UKK |
158 | .enable = mc13783_regulator_enable, |
159 | .disable = mc13783_regulator_disable, | |
160 | .is_enabled = mc13783_regulator_is_enabled, | |
295c08bc SH |
161 | }; |
162 | ||
163 | static int __devinit mc13783_regulator_probe(struct platform_device *pdev) | |
164 | { | |
a10099bc | 165 | struct mc13783_regulator_priv *priv; |
295c08bc | 166 | struct mc13783 *mc13783 = dev_get_drvdata(pdev->dev.parent); |
a10099bc UKK |
167 | struct mc13783_regulator_platform_data *pdata = |
168 | dev_get_platdata(&pdev->dev); | |
295c08bc SH |
169 | struct mc13783_regulator_init_data *init_data; |
170 | int i, ret; | |
171 | ||
172 | dev_dbg(&pdev->dev, "mc13783_regulator_probe id %d\n", pdev->id); | |
173 | ||
a10099bc UKK |
174 | priv = kzalloc(sizeof(*priv) + |
175 | pdata->num_regulators * sizeof(priv->regulators[0]), | |
295c08bc SH |
176 | GFP_KERNEL); |
177 | if (!priv) | |
178 | return -ENOMEM; | |
179 | ||
180 | priv->mc13783 = mc13783; | |
181 | ||
a10099bc UKK |
182 | for (i = 0; i < pdata->num_regulators; i++) { |
183 | init_data = &pdata->regulators[i]; | |
295c08bc SH |
184 | priv->regulators[i] = regulator_register( |
185 | &mc13783_regulators[init_data->id].desc, | |
186 | &pdev->dev, init_data->init_data, priv); | |
187 | ||
188 | if (IS_ERR(priv->regulators[i])) { | |
189 | dev_err(&pdev->dev, "failed to register regulator %s\n", | |
190 | mc13783_regulators[i].desc.name); | |
191 | ret = PTR_ERR(priv->regulators[i]); | |
192 | goto err; | |
193 | } | |
194 | } | |
195 | ||
196 | platform_set_drvdata(pdev, priv); | |
197 | ||
198 | return 0; | |
199 | err: | |
200 | while (--i >= 0) | |
201 | regulator_unregister(priv->regulators[i]); | |
202 | ||
203 | kfree(priv); | |
204 | ||
205 | return ret; | |
206 | } | |
207 | ||
208 | static int __devexit mc13783_regulator_remove(struct platform_device *pdev) | |
209 | { | |
a10099bc UKK |
210 | struct mc13783_regulator_priv *priv = platform_get_drvdata(pdev); |
211 | struct mc13783_regulator_platform_data *pdata = | |
212 | dev_get_platdata(&pdev->dev); | |
295c08bc SH |
213 | int i; |
214 | ||
a10099bc | 215 | for (i = 0; i < pdata->num_regulators; i++) |
295c08bc SH |
216 | regulator_unregister(priv->regulators[i]); |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
221 | static struct platform_driver mc13783_regulator_driver = { | |
222 | .driver = { | |
223 | .name = "mc13783-regulator", | |
224 | .owner = THIS_MODULE, | |
225 | }, | |
226 | .remove = __devexit_p(mc13783_regulator_remove), | |
735eb93a | 227 | .probe = mc13783_regulator_probe, |
295c08bc SH |
228 | }; |
229 | ||
230 | static int __init mc13783_regulator_init(void) | |
231 | { | |
735eb93a | 232 | return platform_driver_register(&mc13783_regulator_driver); |
295c08bc SH |
233 | } |
234 | subsys_initcall(mc13783_regulator_init); | |
235 | ||
236 | static void __exit mc13783_regulator_exit(void) | |
237 | { | |
238 | platform_driver_unregister(&mc13783_regulator_driver); | |
239 | } | |
240 | module_exit(mc13783_regulator_exit); | |
241 | ||
a10099bc | 242 | MODULE_LICENSE("GPL v2"); |
295c08bc SH |
243 | MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de"); |
244 | MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC"); | |
245 | MODULE_ALIAS("platform:mc13783-regulator"); |