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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2022 Analog Devices, Inc.
4 * Driver for the MAX77540 and MAX77541
5 */
6
7#include <linux/i2c.h>
8#include <linux/interrupt.h>
9#include <linux/mfd/core.h>
10#include <linux/mfd/max77541.h>
11#include <linux/property.h>
12#include <linux/regmap.h>
13
14static const struct regmap_config max77541_regmap_config = {
15 .reg_bits = 8,
16 .val_bits = 8,
17};
18
19static const struct regmap_irq max77541_src_irqs[] = {
20 { .mask = MAX77541_BIT_INT_SRC_TOPSYS },
21 { .mask = MAX77541_BIT_INT_SRC_BUCK },
22};
23
24static const struct regmap_irq_chip max77541_src_irq_chip = {
25 .name = "max77541-src",
26 .status_base = MAX77541_REG_INT_SRC,
27 .mask_base = MAX77541_REG_INT_SRC_M,
28 .num_regs = 1,
29 .irqs = max77541_src_irqs,
30 .num_irqs = ARRAY_SIZE(max77541_src_irqs),
31};
32
33static const struct regmap_irq max77541_topsys_irqs[] = {
34 { .mask = MAX77541_BIT_TOPSYS_INT_TJ_120C },
35 { .mask = MAX77541_BIT_TOPSYS_INT_TJ_140C },
36 { .mask = MAX77541_BIT_TOPSYS_INT_TSHDN },
37 { .mask = MAX77541_BIT_TOPSYS_INT_UVLO },
38 { .mask = MAX77541_BIT_TOPSYS_INT_ALT_SWO },
39 { .mask = MAX77541_BIT_TOPSYS_INT_EXT_FREQ_DET },
40};
41
42static const struct regmap_irq_chip max77541_topsys_irq_chip = {
43 .name = "max77541-topsys",
44 .status_base = MAX77541_REG_TOPSYS_INT,
45 .mask_base = MAX77541_REG_TOPSYS_INT_M,
46 .num_regs = 1,
47 .irqs = max77541_topsys_irqs,
48 .num_irqs = ARRAY_SIZE(max77541_topsys_irqs),
49};
50
51static const struct regmap_irq max77541_buck_irqs[] = {
52 { .mask = MAX77541_BIT_BUCK_INT_M1_POK_FLT },
53 { .mask = MAX77541_BIT_BUCK_INT_M2_POK_FLT },
54 { .mask = MAX77541_BIT_BUCK_INT_M1_SCFLT },
55 { .mask = MAX77541_BIT_BUCK_INT_M2_SCFLT },
56};
57
58static const struct regmap_irq_chip max77541_buck_irq_chip = {
59 .name = "max77541-buck",
60 .status_base = MAX77541_REG_BUCK_INT,
61 .mask_base = MAX77541_REG_BUCK_INT_M,
62 .num_regs = 1,
63 .irqs = max77541_buck_irqs,
64 .num_irqs = ARRAY_SIZE(max77541_buck_irqs),
65};
66
67static const struct regmap_irq max77541_adc_irqs[] = {
68 { .mask = MAX77541_BIT_ADC_INT_CH1_I },
69 { .mask = MAX77541_BIT_ADC_INT_CH2_I },
70 { .mask = MAX77541_BIT_ADC_INT_CH3_I },
71 { .mask = MAX77541_BIT_ADC_INT_CH6_I },
72};
73
74static const struct regmap_irq_chip max77541_adc_irq_chip = {
75 .name = "max77541-adc",
76 .status_base = MAX77541_REG_ADC_INT,
77 .mask_base = MAX77541_REG_ADC_INT_M,
78 .num_regs = 1,
79 .irqs = max77541_adc_irqs,
80 .num_irqs = ARRAY_SIZE(max77541_adc_irqs),
81};
82
83static const struct mfd_cell max77540_devs[] = {
84 MFD_CELL_OF("max77540-regulator", NULL, NULL, 0, 0, NULL),
85};
86
87static const struct mfd_cell max77541_devs[] = {
88 MFD_CELL_OF("max77541-regulator", NULL, NULL, 0, 0, NULL),
89 MFD_CELL_OF("max77541-adc", NULL, NULL, 0, 0, NULL),
90};
91
92static int max77541_pmic_irq_init(struct device *dev)
93{
94 struct max77541 *max77541 = dev_get_drvdata(dev);
95 int irq = max77541->i2c->irq;
96 int ret;
97
98 ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq,
99 IRQF_ONESHOT | IRQF_SHARED, 0,
100 &max77541_src_irq_chip,
101 &max77541->irq_data);
102 if (ret)
103 return ret;
104
105 ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq,
106 IRQF_ONESHOT | IRQF_SHARED, 0,
107 &max77541_topsys_irq_chip,
108 &max77541->irq_topsys);
109 if (ret)
110 return ret;
111
112 ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq,
113 IRQF_ONESHOT | IRQF_SHARED, 0,
114 &max77541_buck_irq_chip,
115 &max77541->irq_buck);
116 if (ret)
117 return ret;
118
119 if (max77541->id == MAX77541) {
120 ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq,
121 IRQF_ONESHOT | IRQF_SHARED, 0,
122 &max77541_adc_irq_chip,
123 &max77541->irq_adc);
124 if (ret)
125 return ret;
126 }
127
128 return 0;
129}
130
131static int max77541_pmic_setup(struct device *dev)
132{
133 struct max77541 *max77541 = dev_get_drvdata(dev);
134 const struct mfd_cell *cells;
135 int n_devs;
136 int ret;
137
138 switch (max77541->id) {
139 case MAX77540:
140 cells = max77540_devs;
141 n_devs = ARRAY_SIZE(max77540_devs);
142 break;
143 case MAX77541:
144 cells = max77541_devs;
145 n_devs = ARRAY_SIZE(max77541_devs);
146 break;
147 default:
148 return -EINVAL;
149 }
150
151 ret = max77541_pmic_irq_init(dev);
152 if (ret)
153 return dev_err_probe(dev, ret, "Failed to initialize IRQ\n");
154
155 ret = device_init_wakeup(dev, true);
156 if (ret)
157 return dev_err_probe(dev, ret, "Unable to init wakeup\n");
158
159 return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
160 cells, n_devs, NULL, 0, NULL);
161}
162
163static int max77541_probe(struct i2c_client *client)
164{
165 struct device *dev = &client->dev;
166 struct max77541 *max77541;
167
168 max77541 = devm_kzalloc(dev, sizeof(*max77541), GFP_KERNEL);
169 if (!max77541)
170 return -ENOMEM;
171
172 i2c_set_clientdata(client, max77541);
173 max77541->i2c = client;
174
175 max77541->id = (uintptr_t)i2c_get_match_data(client);
176 if (!max77541->id)
177 return -EINVAL;
178
179 max77541->regmap = devm_regmap_init_i2c(client,
180 &max77541_regmap_config);
181 if (IS_ERR(max77541->regmap))
182 return dev_err_probe(dev, PTR_ERR(max77541->regmap),
183 "Failed to allocate register map\n");
184
185 return max77541_pmic_setup(dev);
186}
187
188static const struct of_device_id max77541_of_id[] = {
189 {
190 .compatible = "adi,max77540",
191 .data = (void *)MAX77540,
192 },
193 {
194 .compatible = "adi,max77541",
195 .data = (void *)MAX77541,
196 },
197 { }
198};
199MODULE_DEVICE_TABLE(of, max77541_of_id);
200
201static const struct i2c_device_id max77541_id[] = {
202 { "max77540", MAX77540 },
203 { "max77541", MAX77541 },
204 { }
205};
206MODULE_DEVICE_TABLE(i2c, max77541_id);
207
208static struct i2c_driver max77541_driver = {
209 .driver = {
210 .name = "max77541",
211 .of_match_table = max77541_of_id,
212 },
213 .probe = max77541_probe,
214 .id_table = max77541_id,
215};
216module_i2c_driver(max77541_driver);
217
218MODULE_DESCRIPTION("MAX7740/MAX7741 Driver");
219MODULE_AUTHOR("Okan Sahin <okan.sahin@analog.com>");
220MODULE_LICENSE("GPL");