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 | |
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, map: max77541->regmap, irq, |
99 | IRQF_ONESHOT | IRQF_SHARED, irq_base: 0, |
100 | chip: &max77541_src_irq_chip, |
101 | data: &max77541->irq_data); |
102 | if (ret) |
103 | return ret; |
104 | |
105 | ret = devm_regmap_add_irq_chip(dev, map: max77541->regmap, irq, |
106 | IRQF_ONESHOT | IRQF_SHARED, irq_base: 0, |
107 | chip: &max77541_topsys_irq_chip, |
108 | data: &max77541->irq_topsys); |
109 | if (ret) |
110 | return ret; |
111 | |
112 | ret = devm_regmap_add_irq_chip(dev, map: max77541->regmap, irq, |
113 | IRQF_ONESHOT | IRQF_SHARED, irq_base: 0, |
114 | chip: &max77541_buck_irq_chip, |
115 | data: &max77541->irq_buck); |
116 | if (ret) |
117 | return ret; |
118 | |
119 | if (max77541->id == MAX77541) { |
120 | ret = devm_regmap_add_irq_chip(dev, map: max77541->regmap, irq, |
121 | IRQF_ONESHOT | IRQF_SHARED, irq_base: 0, |
122 | chip: &max77541_adc_irq_chip, |
123 | data: &max77541->irq_adc); |
124 | if (ret) |
125 | return ret; |
126 | } |
127 | |
128 | return 0; |
129 | } |
130 | |
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, err: ret, fmt: "Failed to initialize IRQ\n" ); |
154 | |
155 | ret = device_init_wakeup(dev, enable: true); |
156 | if (ret) |
157 | return dev_err_probe(dev, err: ret, fmt: "Unable to init wakeup\n" ); |
158 | |
159 | return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, |
160 | cells, n_devs, NULL, irq_base: 0, NULL); |
161 | } |
162 | |
163 | static int max77541_probe(struct i2c_client *client) |
164 | { |
165 | struct device *dev = &client->dev; |
166 | struct max77541 *max77541; |
167 | |
168 | max77541 = devm_kzalloc(dev, size: sizeof(*max77541), GFP_KERNEL); |
169 | if (!max77541) |
170 | return -ENOMEM; |
171 | |
172 | i2c_set_clientdata(client, data: 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(ptr: max77541->regmap)) |
182 | return dev_err_probe(dev, err: PTR_ERR(ptr: max77541->regmap), |
183 | fmt: "Failed to allocate register map\n" ); |
184 | |
185 | return max77541_pmic_setup(dev); |
186 | } |
187 | |
188 | static 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 | }; |
199 | MODULE_DEVICE_TABLE(of, max77541_of_id); |
200 | |
201 | static const struct i2c_device_id max77541_id[] = { |
202 | { "max77540" , MAX77540 }, |
203 | { "max77541" , MAX77541 }, |
204 | { } |
205 | }; |
206 | MODULE_DEVICE_TABLE(i2c, max77541_id); |
207 | |
208 | static 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 | }; |
216 | module_i2c_driver(max77541_driver); |
217 | |
218 | MODULE_DESCRIPTION("MAX7740/MAX7741 Driver" ); |
219 | MODULE_AUTHOR("Okan Sahin <okan.sahin@analog.com>" ); |
220 | MODULE_LICENSE("GPL" ); |
221 | |