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1// SPDX-License-Identifier: GPL-2.0
2//
3// Regulator Driver for Freescale MC13xxx PMIC
4//
5// Copyright 2010 Yong Shen <yong.shen@linaro.org>
6//
7// Based on mc13783 regulator driver :
8// Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
9// Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
10//
11// Regs infos taken from mc13xxx drivers from freescale and mc13xxx.pdf file
12// from freescale
13
14#include <linux/mfd/mc13xxx.h>
15#include <linux/regulator/machine.h>
16#include <linux/regulator/driver.h>
17#include <linux/regulator/of_regulator.h>
18#include <linux/platform_device.h>
19#include <linux/kernel.h>
20#include <linux/slab.h>
21#include <linux/init.h>
22#include <linux/err.h>
23#include <linux/module.h>
24#include <linux/of.h>
25#include "mc13xxx.h"
26
27static int mc13xxx_regulator_enable(struct regulator_dev *rdev)
28{
29 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
30 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
31 int id = rdev_get_id(rdev);
32
33 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
34
35 return mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].reg,
36 mc13xxx_regulators[id].enable_bit,
37 mc13xxx_regulators[id].enable_bit);
38}
39
40static int mc13xxx_regulator_disable(struct regulator_dev *rdev)
41{
42 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
43 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
44 int id = rdev_get_id(rdev);
45
46 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
47
48 return mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].reg,
49 mc13xxx_regulators[id].enable_bit, 0);
50}
51
52static int mc13xxx_regulator_is_enabled(struct regulator_dev *rdev)
53{
54 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
55 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
56 int ret, id = rdev_get_id(rdev);
57 unsigned int val;
58
59 ret = mc13xxx_reg_read(priv->mc13xxx, mc13xxx_regulators[id].reg, &val);
60 if (ret)
61 return ret;
62
63 return (val & mc13xxx_regulators[id].enable_bit) != 0;
64}
65
66static int mc13xxx_regulator_set_voltage_sel(struct regulator_dev *rdev,
67 unsigned selector)
68{
69 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
70 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
71 int id = rdev_get_id(rdev);
72
73 return mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].vsel_reg,
74 mc13xxx_regulators[id].vsel_mask,
75 selector << mc13xxx_regulators[id].vsel_shift);
76}
77
78static int mc13xxx_regulator_get_voltage(struct regulator_dev *rdev)
79{
80 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
81 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
82 int ret, id = rdev_get_id(rdev);
83 unsigned int val;
84
85 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
86
87 ret = mc13xxx_reg_read(priv->mc13xxx,
88 mc13xxx_regulators[id].vsel_reg, &val);
89 if (ret)
90 return ret;
91
92 val = (val & mc13xxx_regulators[id].vsel_mask)
93 >> mc13xxx_regulators[id].vsel_shift;
94
95 dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val);
96
97 BUG_ON(val >= mc13xxx_regulators[id].desc.n_voltages);
98
99 return rdev->desc->volt_table[val];
100}
101
102const struct regulator_ops mc13xxx_regulator_ops = {
103 .enable = mc13xxx_regulator_enable,
104 .disable = mc13xxx_regulator_disable,
105 .is_enabled = mc13xxx_regulator_is_enabled,
106 .list_voltage = regulator_list_voltage_table,
107 .set_voltage_sel = mc13xxx_regulator_set_voltage_sel,
108 .get_voltage = mc13xxx_regulator_get_voltage,
109};
110EXPORT_SYMBOL_GPL(mc13xxx_regulator_ops);
111
112int mc13xxx_fixed_regulator_set_voltage(struct regulator_dev *rdev, int min_uV,
113 int max_uV, unsigned *selector)
114{
115 int id = rdev_get_id(rdev);
116
117 dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
118 __func__, id, min_uV, max_uV);
119
120 if (min_uV <= rdev->desc->volt_table[0] &&
121 rdev->desc->volt_table[0] <= max_uV) {
122 *selector = 0;
123 return 0;
124 } else {
125 return -EINVAL;
126 }
127}
128EXPORT_SYMBOL_GPL(mc13xxx_fixed_regulator_set_voltage);
129
130const struct regulator_ops mc13xxx_fixed_regulator_ops = {
131 .enable = mc13xxx_regulator_enable,
132 .disable = mc13xxx_regulator_disable,
133 .is_enabled = mc13xxx_regulator_is_enabled,
134 .list_voltage = regulator_list_voltage_table,
135 .set_voltage = mc13xxx_fixed_regulator_set_voltage,
136};
137EXPORT_SYMBOL_GPL(mc13xxx_fixed_regulator_ops);
138
139#ifdef CONFIG_OF
140int mc13xxx_get_num_regulators_dt(struct platform_device *pdev)
141{
142 struct device_node *parent;
143 int num;
144
145 if (!pdev->dev.parent->of_node)
146 return -ENODEV;
147
148 parent = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
149 if (!parent)
150 return -ENODEV;
151
152 num = of_get_child_count(parent);
153 of_node_put(parent);
154 return num;
155}
156EXPORT_SYMBOL_GPL(mc13xxx_get_num_regulators_dt);
157
158struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
159 struct platform_device *pdev, struct mc13xxx_regulator *regulators,
160 int num_regulators)
161{
162 struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
163 struct mc13xxx_regulator_init_data *data, *p;
164 struct device_node *parent, *child;
165 int i, parsed = 0;
166
167 if (!pdev->dev.parent->of_node)
168 return NULL;
169
170 parent = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
171 if (!parent)
172 return NULL;
173
174 data = devm_kcalloc(&pdev->dev, priv->num_regulators, sizeof(*data),
175 GFP_KERNEL);
176 if (!data) {
177 of_node_put(parent);
178 return NULL;
179 }
180
181 p = data;
182
183 for_each_child_of_node(parent, child) {
184 int found = 0;
185
186 for (i = 0; i < num_regulators; i++) {
187 if (!regulators[i].desc.name)
188 continue;
189 if (of_node_name_eq(child,
190 regulators[i].desc.name)) {
191 p->id = i;
192 p->init_data = of_get_regulator_init_data(
193 &pdev->dev, child,
194 ®ulators[i].desc);
195 p->node = child;
196 p++;
197
198 parsed++;
199 found = 1;
200 break;
201 }
202 }
203
204 if (!found)
205 dev_warn(&pdev->dev,
206 "Unknown regulator: %pOFn\n", child);
207 }
208 of_node_put(parent);
209
210 priv->num_regulators = parsed;
211
212 return data;
213}
214EXPORT_SYMBOL_GPL(mc13xxx_parse_regulators_dt);
215#endif
216
217MODULE_LICENSE("GPL v2");
218MODULE_AUTHOR("Yong Shen <yong.shen@linaro.org>");
219MODULE_DESCRIPTION("Regulator Driver for Freescale MC13xxx PMIC");
220MODULE_ALIAS("mc13xxx-regulator-core");
1/*
2 * Regulator Driver for Freescale MC13xxx PMIC
3 *
4 * Copyright 2010 Yong Shen <yong.shen@linaro.org>
5 *
6 * Based on mc13783 regulator driver :
7 * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
8 * Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * Regs infos taken from mc13xxx drivers from freescale and mc13xxx.pdf file
15 * from freescale
16 */
17
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 int ret;
37
38 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
39
40 mc13xxx_lock(priv->mc13xxx);
41 ret = mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].reg,
42 mc13xxx_regulators[id].enable_bit,
43 mc13xxx_regulators[id].enable_bit);
44 mc13xxx_unlock(priv->mc13xxx);
45
46 return ret;
47}
48
49static int mc13xxx_regulator_disable(struct regulator_dev *rdev)
50{
51 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
52 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
53 int id = rdev_get_id(rdev);
54 int ret;
55
56 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
57
58 mc13xxx_lock(priv->mc13xxx);
59 ret = mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].reg,
60 mc13xxx_regulators[id].enable_bit, 0);
61 mc13xxx_unlock(priv->mc13xxx);
62
63 return ret;
64}
65
66static int mc13xxx_regulator_is_enabled(struct regulator_dev *rdev)
67{
68 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
69 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
70 int ret, id = rdev_get_id(rdev);
71 unsigned int val;
72
73 mc13xxx_lock(priv->mc13xxx);
74 ret = mc13xxx_reg_read(priv->mc13xxx, mc13xxx_regulators[id].reg, &val);
75 mc13xxx_unlock(priv->mc13xxx);
76
77 if (ret)
78 return ret;
79
80 return (val & mc13xxx_regulators[id].enable_bit) != 0;
81}
82
83static int mc13xxx_regulator_set_voltage_sel(struct regulator_dev *rdev,
84 unsigned selector)
85{
86 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
87 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
88 int id = rdev_get_id(rdev);
89 int ret;
90
91 mc13xxx_lock(priv->mc13xxx);
92 ret = mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].vsel_reg,
93 mc13xxx_regulators[id].vsel_mask,
94 selector << mc13xxx_regulators[id].vsel_shift);
95 mc13xxx_unlock(priv->mc13xxx);
96
97 return ret;
98}
99
100static int mc13xxx_regulator_get_voltage(struct regulator_dev *rdev)
101{
102 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
103 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
104 int ret, id = rdev_get_id(rdev);
105 unsigned int val;
106
107 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
108
109 mc13xxx_lock(priv->mc13xxx);
110 ret = mc13xxx_reg_read(priv->mc13xxx,
111 mc13xxx_regulators[id].vsel_reg, &val);
112 mc13xxx_unlock(priv->mc13xxx);
113
114 if (ret)
115 return ret;
116
117 val = (val & mc13xxx_regulators[id].vsel_mask)
118 >> mc13xxx_regulators[id].vsel_shift;
119
120 dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val);
121
122 BUG_ON(val >= mc13xxx_regulators[id].desc.n_voltages);
123
124 return rdev->desc->volt_table[val];
125}
126
127struct regulator_ops mc13xxx_regulator_ops = {
128 .enable = mc13xxx_regulator_enable,
129 .disable = mc13xxx_regulator_disable,
130 .is_enabled = mc13xxx_regulator_is_enabled,
131 .list_voltage = regulator_list_voltage_table,
132 .set_voltage_sel = mc13xxx_regulator_set_voltage_sel,
133 .get_voltage = mc13xxx_regulator_get_voltage,
134};
135EXPORT_SYMBOL_GPL(mc13xxx_regulator_ops);
136
137int mc13xxx_fixed_regulator_set_voltage(struct regulator_dev *rdev, int min_uV,
138 int max_uV, unsigned *selector)
139{
140 int id = rdev_get_id(rdev);
141
142 dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
143 __func__, id, min_uV, max_uV);
144
145 if (min_uV <= rdev->desc->volt_table[0] &&
146 rdev->desc->volt_table[0] <= max_uV) {
147 *selector = 0;
148 return 0;
149 } else {
150 return -EINVAL;
151 }
152}
153EXPORT_SYMBOL_GPL(mc13xxx_fixed_regulator_set_voltage);
154
155struct regulator_ops mc13xxx_fixed_regulator_ops = {
156 .enable = mc13xxx_regulator_enable,
157 .disable = mc13xxx_regulator_disable,
158 .is_enabled = mc13xxx_regulator_is_enabled,
159 .list_voltage = regulator_list_voltage_table,
160 .set_voltage = mc13xxx_fixed_regulator_set_voltage,
161};
162EXPORT_SYMBOL_GPL(mc13xxx_fixed_regulator_ops);
163
164#ifdef CONFIG_OF
165int mc13xxx_get_num_regulators_dt(struct platform_device *pdev)
166{
167 struct device_node *parent;
168 int num;
169
170 if (!pdev->dev.parent->of_node)
171 return -ENODEV;
172
173 parent = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
174 if (!parent)
175 return -ENODEV;
176
177 num = of_get_child_count(parent);
178 of_node_put(parent);
179 return num;
180}
181EXPORT_SYMBOL_GPL(mc13xxx_get_num_regulators_dt);
182
183struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
184 struct platform_device *pdev, struct mc13xxx_regulator *regulators,
185 int num_regulators)
186{
187 struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
188 struct mc13xxx_regulator_init_data *data, *p;
189 struct device_node *parent, *child;
190 int i, parsed = 0;
191
192 if (!pdev->dev.parent->of_node)
193 return NULL;
194
195 parent = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
196 if (!parent)
197 return NULL;
198
199 data = devm_kzalloc(&pdev->dev, sizeof(*data) * priv->num_regulators,
200 GFP_KERNEL);
201 if (!data) {
202 of_node_put(parent);
203 return NULL;
204 }
205
206 p = data;
207
208 for_each_child_of_node(parent, child) {
209 int found = 0;
210
211 for (i = 0; i < num_regulators; i++) {
212 if (!regulators[i].desc.name)
213 continue;
214 if (!of_node_cmp(child->name,
215 regulators[i].desc.name)) {
216 p->id = i;
217 p->init_data = of_get_regulator_init_data(
218 &pdev->dev, child);
219 p->node = child;
220 p++;
221
222 parsed++;
223 found = 1;
224 break;
225 }
226 }
227
228 if (!found)
229 dev_warn(&pdev->dev,
230 "Unknown regulator: %s\n", child->name);
231 }
232 of_node_put(parent);
233
234 priv->num_regulators = parsed;
235
236 return data;
237}
238EXPORT_SYMBOL_GPL(mc13xxx_parse_regulators_dt);
239#endif
240
241MODULE_LICENSE("GPL v2");
242MODULE_AUTHOR("Yong Shen <yong.shen@linaro.org>");
243MODULE_DESCRIPTION("Regulator Driver for Freescale MC13xxx PMIC");
244MODULE_ALIAS("mc13xxx-regulator-core");