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-rw-r--r--drivers/regulator/mc13783-regulator.c245
1 files changed, 245 insertions, 0 deletions
diff --git a/drivers/regulator/mc13783-regulator.c b/drivers/regulator/mc13783-regulator.c
new file mode 100644
index 000000000000..39c495300045
--- /dev/null
+++ b/drivers/regulator/mc13783-regulator.c
@@ -0,0 +1,245 @@
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
11#include <linux/mfd/mc13783.h>
12#include <linux/regulator/machine.h>
13#include <linux/regulator/driver.h>
14#include <linux/platform_device.h>
15#include <linux/kernel.h>
16#include <linux/init.h>
17#include <linux/err.h>
18
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
52struct mc13783_regulator {
53 struct regulator_desc desc;
54 int reg;
55 int enable_bit;
56};
57
58static struct regulator_ops mc13783_regulator_ops;
59
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
76static struct mc13783_regulator mc13783_regulators[] = {
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),
101};
102
103struct mc13783_regulator_priv {
104 struct mc13783 *mc13783;
105 struct regulator_dev *regulators[];
106};
107
108static int mc13783_regulator_enable(struct regulator_dev *rdev)
109{
110 struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
111 int id = rdev_get_id(rdev);
112 int ret;
113
114 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
115
116 mc13783_lock(priv->mc13783);
117 ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg,
118 mc13783_regulators[id].enable_bit,
119 mc13783_regulators[id].enable_bit);
120 mc13783_unlock(priv->mc13783);
121
122 return ret;
123}
124
125static int mc13783_regulator_disable(struct regulator_dev *rdev)
126{
127 struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
128 int id = rdev_get_id(rdev);
129 int ret;
130
131 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
132
133 mc13783_lock(priv->mc13783);
134 ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg,
135 mc13783_regulators[id].enable_bit, 0);
136 mc13783_unlock(priv->mc13783);
137
138 return ret;
139}
140
141static int mc13783_regulator_is_enabled(struct regulator_dev *rdev)
142{
143 struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
144 int ret, id = rdev_get_id(rdev);
145 unsigned int val;
146
147 mc13783_lock(priv->mc13783);
148 ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val);
149 mc13783_unlock(priv->mc13783);
150
151 if (ret)
152 return ret;
153
154 return (val & mc13783_regulators[id].enable_bit) != 0;
155}
156
157static struct regulator_ops mc13783_regulator_ops = {
158 .enable = mc13783_regulator_enable,
159 .disable = mc13783_regulator_disable,
160 .is_enabled = mc13783_regulator_is_enabled,
161};
162
163static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
164{
165 struct mc13783_regulator_priv *priv;
166 struct mc13783 *mc13783 = dev_get_drvdata(pdev->dev.parent);
167 struct mc13783_regulator_platform_data *pdata =
168 dev_get_platdata(&pdev->dev);
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
174 priv = kzalloc(sizeof(*priv) +
175 pdata->num_regulators * sizeof(priv->regulators[0]),
176 GFP_KERNEL);
177 if (!priv)
178 return -ENOMEM;
179
180 priv->mc13783 = mc13783;
181
182 for (i = 0; i < pdata->num_regulators; i++) {
183 init_data = &pdata->regulators[i];
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;
199err:
200 while (--i >= 0)
201 regulator_unregister(priv->regulators[i]);
202
203 kfree(priv);
204
205 return ret;
206}
207
208static int __devexit mc13783_regulator_remove(struct platform_device *pdev)
209{
210 struct mc13783_regulator_priv *priv = platform_get_drvdata(pdev);
211 struct mc13783_regulator_platform_data *pdata =
212 dev_get_platdata(&pdev->dev);
213 int i;
214
215 for (i = 0; i < pdata->num_regulators; i++)
216 regulator_unregister(priv->regulators[i]);
217
218 return 0;
219}
220
221static struct platform_driver mc13783_regulator_driver = {
222 .driver = {
223 .name = "mc13783-regulator",
224 .owner = THIS_MODULE,
225 },
226 .remove = __devexit_p(mc13783_regulator_remove),
227 .probe = mc13783_regulator_probe,
228};
229
230static int __init mc13783_regulator_init(void)
231{
232 return platform_driver_register(&mc13783_regulator_driver);
233}
234subsys_initcall(mc13783_regulator_init);
235
236static void __exit mc13783_regulator_exit(void)
237{
238 platform_driver_unregister(&mc13783_regulator_driver);
239}
240module_exit(mc13783_regulator_exit);
241
242MODULE_LICENSE("GPL v2");
243MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
244MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
245MODULE_ALIAS("platform:mc13783-regulator");
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-06 13:53:51 -0500