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
14 static const struct regmap_config max77541_regmap_config = {
15 .reg_bits = 8,
16 .val_bits = 8,
17 };
18
19 static const struct regmap_irq max77541_src_irqs[] = {
20 { .mask = MAX77541_BIT_INT_SRC_TOPSYS },
21 { .mask = MAX77541_BIT_INT_SRC_BUCK },
22 };
23
24 static 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
33 static 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
42 static 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
51 static 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
58 static 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
67 static 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
74 static 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
83 static const struct mfd_cell max77540_devs[] = {
84 MFD_CELL_OF("max77540-regulator", NULL, NULL, 0, 0, NULL),
85 };
86
87 static 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
max77541_pmic_irq_init(struct device * dev)92 static 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
max77541_pmic_setup(struct device * dev)131 static 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
max77541_probe(struct i2c_client * client)163 static int max77541_probe(struct i2c_client *client)
164 {
165 const struct i2c_device_id *id = i2c_client_get_device_id(client);
166 struct device *dev = &client->dev;
167 struct max77541 *max77541;
168
169 max77541 = devm_kzalloc(dev, sizeof(*max77541), GFP_KERNEL);
170 if (!max77541)
171 return -ENOMEM;
172
173 i2c_set_clientdata(client, max77541);
174 max77541->i2c = client;
175
176 max77541->id = (uintptr_t)device_get_match_data(dev);
177 if (!max77541->id)
178 max77541->id = (enum max7754x_ids)id->driver_data;
179
180 if (!max77541->id)
181 return -EINVAL;
182
183 max77541->regmap = devm_regmap_init_i2c(client,
184 &max77541_regmap_config);
185 if (IS_ERR(max77541->regmap))
186 return dev_err_probe(dev, PTR_ERR(max77541->regmap),
187 "Failed to allocate register map\n");
188
189 return max77541_pmic_setup(dev);
190 }
191
192 static const struct of_device_id max77541_of_id[] = {
193 {
194 .compatible = "adi,max77540",
195 .data = (void *)MAX77540,
196 },
197 {
198 .compatible = "adi,max77541",
199 .data = (void *)MAX77541,
200 },
201 { }
202 };
203 MODULE_DEVICE_TABLE(of, max77541_of_id);
204
205 static const struct i2c_device_id max77541_id[] = {
206 { "max77540", MAX77540 },
207 { "max77541", MAX77541 },
208 { }
209 };
210 MODULE_DEVICE_TABLE(i2c, max77541_id);
211
212 static struct i2c_driver max77541_driver = {
213 .driver = {
214 .name = "max77541",
215 .of_match_table = max77541_of_id,
216 },
217 .probe = max77541_probe,
218 .id_table = max77541_id,
219 };
220 module_i2c_driver(max77541_driver);
221
222 MODULE_DESCRIPTION("MAX7740/MAX7741 Driver");
223 MODULE_AUTHOR("Okan Sahin <okan.sahin@analog.com>");
224 MODULE_LICENSE("GPL");
225