xref: /openbmc/linux/drivers/mfd/max77541.c (revision b1da9966)
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