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18#include <linux/mfd/mc13xxx.h>
19#include <linux/regulator/machine.h>
20#include <linux/regulator/driver.h>
21#include <linux/regulator/of_regulator.h>
22#include <linux/platform_device.h>
23#include <linux/kernel.h>
24#include <linux/slab.h>
25#include <linux/init.h>
26#include <linux/err.h>
27#include <linux/module.h>
28#include <linux/of.h>
29#include "mc13xxx.h"
30
31static int mc13xxx_regulator_enable(struct regulator_dev *rdev)
32{
33 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
34 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
35 int id = rdev_get_id(rdev);
36
37 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
38
39 return mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].reg,
40 mc13xxx_regulators[id].enable_bit,
41 mc13xxx_regulators[id].enable_bit);
42}
43
44static int mc13xxx_regulator_disable(struct regulator_dev *rdev)
45{
46 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
47 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
48 int id = rdev_get_id(rdev);
49
50 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
51
52 return mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].reg,
53 mc13xxx_regulators[id].enable_bit, 0);
54}
55
56static int mc13xxx_regulator_is_enabled(struct regulator_dev *rdev)
57{
58 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
59 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
60 int ret, id = rdev_get_id(rdev);
61 unsigned int val;
62
63 ret = mc13xxx_reg_read(priv->mc13xxx, mc13xxx_regulators[id].reg, &val);
64 if (ret)
65 return ret;
66
67 return (val & mc13xxx_regulators[id].enable_bit) != 0;
68}
69
70static int mc13xxx_regulator_set_voltage_sel(struct regulator_dev *rdev,
71 unsigned selector)
72{
73 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
74 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
75 int id = rdev_get_id(rdev);
76
77 return mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].vsel_reg,
78 mc13xxx_regulators[id].vsel_mask,
79 selector << mc13xxx_regulators[id].vsel_shift);
80}
81
82static int mc13xxx_regulator_get_voltage(struct regulator_dev *rdev)
83{
84 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
85 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
86 int ret, id = rdev_get_id(rdev);
87 unsigned int val;
88
89 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
90
91 ret = mc13xxx_reg_read(priv->mc13xxx,
92 mc13xxx_regulators[id].vsel_reg, &val);
93 if (ret)
94 return ret;
95
96 val = (val & mc13xxx_regulators[id].vsel_mask)
97 >> mc13xxx_regulators[id].vsel_shift;
98
99 dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val);
100
101 BUG_ON(val >= mc13xxx_regulators[id].desc.n_voltages);
102
103 return rdev->desc->volt_table[val];
104}
105
106struct regulator_ops mc13xxx_regulator_ops = {
107 .enable = mc13xxx_regulator_enable,
108 .disable = mc13xxx_regulator_disable,
109 .is_enabled = mc13xxx_regulator_is_enabled,
110 .list_voltage = regulator_list_voltage_table,
111 .set_voltage_sel = mc13xxx_regulator_set_voltage_sel,
112 .get_voltage = mc13xxx_regulator_get_voltage,
113};
114EXPORT_SYMBOL_GPL(mc13xxx_regulator_ops);
115
116int mc13xxx_fixed_regulator_set_voltage(struct regulator_dev *rdev, int min_uV,
117 int max_uV, unsigned *selector)
118{
119 int id = rdev_get_id(rdev);
120
121 dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
122 __func__, id, min_uV, max_uV);
123
124 if (min_uV <= rdev->desc->volt_table[0] &&
125 rdev->desc->volt_table[0] <= max_uV) {
126 *selector = 0;
127 return 0;
128 } else {
129 return -EINVAL;
130 }
131}
132EXPORT_SYMBOL_GPL(mc13xxx_fixed_regulator_set_voltage);
133
134struct regulator_ops mc13xxx_fixed_regulator_ops = {
135 .enable = mc13xxx_regulator_enable,
136 .disable = mc13xxx_regulator_disable,
137 .is_enabled = mc13xxx_regulator_is_enabled,
138 .list_voltage = regulator_list_voltage_table,
139 .set_voltage = mc13xxx_fixed_regulator_set_voltage,
140};
141EXPORT_SYMBOL_GPL(mc13xxx_fixed_regulator_ops);
142
143#ifdef CONFIG_OF
144int mc13xxx_get_num_regulators_dt(struct platform_device *pdev)
145{
146 struct device_node *parent;
147 int num;
148
149 if (!pdev->dev.parent->of_node)
150 return -ENODEV;
151
152 parent = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
153 if (!parent)
154 return -ENODEV;
155
156 num = of_get_child_count(parent);
157 of_node_put(parent);
158 return num;
159}
160EXPORT_SYMBOL_GPL(mc13xxx_get_num_regulators_dt);
161
162struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
163 struct platform_device *pdev, struct mc13xxx_regulator *regulators,
164 int num_regulators)
165{
166 struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
167 struct mc13xxx_regulator_init_data *data, *p;
168 struct device_node *parent, *child;
169 int i, parsed = 0;
170
171 if (!pdev->dev.parent->of_node)
172 return NULL;
173
174 parent = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
175 if (!parent)
176 return NULL;
177
178 data = devm_kzalloc(&pdev->dev, sizeof(*data) * priv->num_regulators,
179 GFP_KERNEL);
180 if (!data) {
181 of_node_put(parent);
182 return NULL;
183 }
184
185 p = data;
186
187 for_each_child_of_node(parent, child) {
188 int found = 0;
189
190 for (i = 0; i < num_regulators; i++) {
191 if (!regulators[i].desc.name)
192 continue;
193 if (!of_node_cmp(child->name,
194 regulators[i].desc.name)) {
195 p->id = i;
196 p->init_data = of_get_regulator_init_data(
197 &pdev->dev, child,
198 ®ulators[i].desc);
199 p->node = child;
200 p++;
201
202 parsed++;
203 found = 1;
204 break;
205 }
206 }
207
208 if (!found)
209 dev_warn(&pdev->dev,
210 "Unknown regulator: %s\n", child->name);
211 }
212 of_node_put(parent);
213
214 priv->num_regulators = parsed;
215
216 return data;
217}
218EXPORT_SYMBOL_GPL(mc13xxx_parse_regulators_dt);
219#endif
220
221MODULE_LICENSE("GPL v2");
222MODULE_AUTHOR("Yong Shen <yong.shen@linaro.org>");
223MODULE_DESCRIPTION("Regulator Driver for Freescale MC13xxx PMIC");
224MODULE_ALIAS("mc13xxx-regulator-core");
225
