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		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
199		.of_match_table	= of_match_ptr(isl9305_dt_ids),
200	},
201	.probe = isl9305_i2c_probe,
202	.id_table = isl9305_i2c_id,
203};
204
205module_i2c_driver(isl9305_regulator_driver);
206
207MODULE_AUTHOR("Mark Brown");
208MODULE_DESCRIPTION("Intersil ISL9305 DCDC regulator");
209MODULE_LICENSE("GPL");
210