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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * isl9305 - Intersil ISL9305 DCDC regulator
4 *
5 * Copyright 2014 Linaro Ltd
6 *
7 * Author: Mark Brown <broonie@kernel.org>
8 */
9
10#include <linux/module.h>
11#include <linux/err.h>
12#include <linux/i2c.h>
13#include <linux/of.h>
14#include <linux/platform_data/isl9305.h>
15#include <linux/regmap.h>
16#include <linux/regulator/driver.h>
17#include <linux/regulator/of_regulator.h>
18#include <linux/slab.h>
19
20/*
21 * Registers
22 */
23#define ISL9305_DCD1OUT 0x0
24#define ISL9305_DCD2OUT 0x1
25#define ISL9305_LDO1OUT 0x2
26#define ISL9305_LDO2OUT 0x3
27#define ISL9305_DCD_PARAMETER 0x4
28#define ISL9305_SYSTEM_PARAMETER 0x5
29#define ISL9305_DCD_SRCTL 0x6
30
31#define ISL9305_MAX_REG ISL9305_DCD_SRCTL
32
33/*
34 * DCD_PARAMETER
35 */
36#define ISL9305_DCD_PHASE 0x40
37#define ISL9305_DCD2_ULTRA 0x20
38#define ISL9305_DCD1_ULTRA 0x10
39#define ISL9305_DCD2_BLD 0x08
40#define ISL9305_DCD1_BLD 0x04
41#define ISL9305_DCD2_MODE 0x02
42#define ISL9305_DCD1_MODE 0x01
43
44/*
45 * SYSTEM_PARAMETER
46 */
47#define ISL9305_I2C_EN 0x40
48#define ISL9305_DCDPOR_MASK 0x30
49#define ISL9305_LDO2_EN 0x08
50#define ISL9305_LDO1_EN 0x04
51#define ISL9305_DCD2_EN 0x02
52#define ISL9305_DCD1_EN 0x01
53
54/*
55 * DCD_SRCTL
56 */
57#define ISL9305_DCD2SR_MASK 0xc0
58#define ISL9305_DCD1SR_MASK 0x07
59
60static const struct regulator_ops isl9305_ops = {
61 .enable = regulator_enable_regmap,
62 .disable = regulator_disable_regmap,
63 .is_enabled = regulator_is_enabled_regmap,
64 .list_voltage = regulator_list_voltage_linear,
65 .get_voltage_sel = regulator_get_voltage_sel_regmap,
66 .set_voltage_sel = regulator_set_voltage_sel_regmap,
67};
68
69static const struct regulator_desc isl9305_regulators[] = {
70 [ISL9305_DCD1] = {
71 .name = "DCD1",
72 .of_match = of_match_ptr("dcd1"),
73 .regulators_node = of_match_ptr("regulators"),
74 .n_voltages = 0x70,
75 .min_uV = 825000,
76 .uV_step = 25000,
77 .vsel_reg = ISL9305_DCD1OUT,
78 .vsel_mask = 0x7f,
79 .enable_reg = ISL9305_SYSTEM_PARAMETER,
80 .enable_mask = ISL9305_DCD1_EN,
81 .supply_name = "VINDCD1",
82 .ops = &isl9305_ops,
83 .owner = THIS_MODULE,
84 },
85 [ISL9305_DCD2] = {
86 .name = "DCD2",
87 .of_match = of_match_ptr("dcd2"),
88 .regulators_node = of_match_ptr("regulators"),
89 .n_voltages = 0x70,
90 .min_uV = 825000,
91 .uV_step = 25000,
92 .vsel_reg = ISL9305_DCD2OUT,
93 .vsel_mask = 0x7f,
94 .enable_reg = ISL9305_SYSTEM_PARAMETER,
95 .enable_mask = ISL9305_DCD2_EN,
96 .supply_name = "VINDCD2",
97 .ops = &isl9305_ops,
98 .owner = THIS_MODULE,
99 },
100 [ISL9305_LDO1] = {
101 .name = "LDO1",
102 .of_match = of_match_ptr("ldo1"),
103 .regulators_node = of_match_ptr("regulators"),
104 .n_voltages = 0x37,
105 .min_uV = 900000,
106 .uV_step = 50000,
107 .vsel_reg = ISL9305_LDO1OUT,
108 .vsel_mask = 0x3f,
109 .enable_reg = ISL9305_SYSTEM_PARAMETER,
110 .enable_mask = ISL9305_LDO1_EN,
111 .supply_name = "VINLDO1",
112 .ops = &isl9305_ops,
113 .owner = THIS_MODULE,
114 },
115 [ISL9305_LDO2] = {
116 .name = "LDO2",
117 .of_match = of_match_ptr("ldo2"),
118 .regulators_node = of_match_ptr("regulators"),
119 .n_voltages = 0x37,
120 .min_uV = 900000,
121 .uV_step = 50000,
122 .vsel_reg = ISL9305_LDO2OUT,
123 .vsel_mask = 0x3f,
124 .enable_reg = ISL9305_SYSTEM_PARAMETER,
125 .enable_mask = ISL9305_LDO2_EN,
126 .supply_name = "VINLDO2",
127 .ops = &isl9305_ops,
128 .owner = THIS_MODULE,
129 },
130};
131
132static const struct regmap_config isl9305_regmap = {
133 .reg_bits = 8,
134 .val_bits = 8,
135
136 .max_register = ISL9305_MAX_REG,
137 .cache_type = REGCACHE_RBTREE,
138};
139
140static int isl9305_i2c_probe(struct i2c_client *i2c)
141{
142 struct regulator_config config = { };
143 struct isl9305_pdata *pdata = i2c->dev.platform_data;
144 struct regulator_dev *rdev;
145 struct regmap *regmap;
146 int i, ret;
147
148 regmap = devm_regmap_init_i2c(i2c, &isl9305_regmap);
149 if (IS_ERR(regmap)) {
150 ret = PTR_ERR(regmap);
151 dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);
152 return ret;
153 }
154
155 config.dev = &i2c->dev;
156
157 for (i = 0; i < ARRAY_SIZE(isl9305_regulators); i++) {
158 if (pdata)
159 config.init_data = pdata->init_data[i];
160 else
161 config.init_data = NULL;
162
163 rdev = devm_regulator_register(&i2c->dev,
164 &isl9305_regulators[i],
165 &config);
166 if (IS_ERR(rdev)) {
167 ret = PTR_ERR(rdev);
168 dev_err(&i2c->dev, "Failed to register %s: %d\n",
169 isl9305_regulators[i].name, ret);
170 return ret;
171 }
172 }
173
174 return 0;
175}
176
177#ifdef CONFIG_OF
178static const struct of_device_id isl9305_dt_ids[] = {
179 { .compatible = "isl,isl9305" }, /* for backward compat., don't use */
180 { .compatible = "isil,isl9305" },
181 { .compatible = "isl,isl9305h" }, /* for backward compat., don't use */
182 { .compatible = "isil,isl9305h" },
183 {},
184};
185MODULE_DEVICE_TABLE(of, isl9305_dt_ids);
186#endif
187
188static const struct i2c_device_id isl9305_i2c_id[] = {
189 { "isl9305", },
190 { "isl9305h", },
191 { }
192};
193MODULE_DEVICE_TABLE(i2c, isl9305_i2c_id);
194
195static struct i2c_driver isl9305_regulator_driver = {
196 .driver = {
197 .name = "isl9305",
198 .of_match_table = of_match_ptr(isl9305_dt_ids),
199 },
200 .probe_new = isl9305_i2c_probe,
201 .id_table = isl9305_i2c_id,
202};
203
204module_i2c_driver(isl9305_regulator_driver);
205
206MODULE_AUTHOR("Mark Brown");
207MODULE_DESCRIPTION("Intersil ISL9305 DCDC regulator");
208MODULE_LICENSE("GPL");