1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * MFD core driver for the Richtek RT5033.
4 *
5 * RT5033 comprises multiple sub-devices switcing charger, fuel gauge,
6 * flash LED, current source, LDO and BUCK regulators.
7 *
8 * Copyright (C) 2014 Samsung Electronics, Co., Ltd.
9 * Author: Beomho Seo <beomho.seo@samsung.com>
10 */
11
12 #include <linux/err.h>
13 #include <linux/module.h>
14 #include <linux/interrupt.h>
15 #include <linux/of_device.h>
16 #include <linux/mfd/core.h>
17 #include <linux/mfd/rt5033.h>
18 #include <linux/mfd/rt5033-private.h>
19
20 static const struct regmap_irq rt5033_irqs[] = {
21 { .mask = RT5033_PMIC_IRQ_BUCKOCP, },
22 { .mask = RT5033_PMIC_IRQ_BUCKLV, },
23 { .mask = RT5033_PMIC_IRQ_SAFELDOLV, },
24 { .mask = RT5033_PMIC_IRQ_LDOLV, },
25 { .mask = RT5033_PMIC_IRQ_OT, },
26 { .mask = RT5033_PMIC_IRQ_VDDA_UV, },
27 };
28
29 static const struct regmap_irq_chip rt5033_irq_chip = {
30 .name = "rt5033",
31 .status_base = RT5033_REG_PMIC_IRQ_STAT,
32 .unmask_base = RT5033_REG_PMIC_IRQ_CTRL,
33 .num_regs = 1,
34 .irqs = rt5033_irqs,
35 .num_irqs = ARRAY_SIZE(rt5033_irqs),
36 };
37
38 static const struct mfd_cell rt5033_devs[] = {
39 { .name = "rt5033-regulator", },
40 {
41 .name = "rt5033-charger",
42 .of_compatible = "richtek,rt5033-charger",
43 }, {
44 .name = "rt5033-battery",
45 .of_compatible = "richtek,rt5033-battery",
46 }, {
47 .name = "rt5033-led",
48 .of_compatible = "richtek,rt5033-led",
49 },
50 };
51
52 static const struct regmap_config rt5033_regmap_config = {
53 .reg_bits = 8,
54 .val_bits = 8,
55 .max_register = RT5033_REG_END,
56 };
57
rt5033_i2c_probe(struct i2c_client * i2c)58 static int rt5033_i2c_probe(struct i2c_client *i2c)
59 {
60 struct rt5033_dev *rt5033;
61 unsigned int dev_id;
62 int ret;
63
64 rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL);
65 if (!rt5033)
66 return -ENOMEM;
67
68 i2c_set_clientdata(i2c, rt5033);
69 rt5033->dev = &i2c->dev;
70 rt5033->irq = i2c->irq;
71 rt5033->wakeup = true;
72
73 rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config);
74 if (IS_ERR(rt5033->regmap)) {
75 dev_err(&i2c->dev, "Failed to allocate register map.\n");
76 return PTR_ERR(rt5033->regmap);
77 }
78
79 ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id);
80 if (ret) {
81 dev_err(&i2c->dev, "Device not found\n");
82 return -ENODEV;
83 }
84 dev_info(&i2c->dev, "Device found Device ID: %04x\n", dev_id);
85
86 ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq,
87 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
88 0, &rt5033_irq_chip, &rt5033->irq_data);
89 if (ret) {
90 dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
91 rt5033->irq, ret);
92 return ret;
93 }
94
95 ret = devm_mfd_add_devices(rt5033->dev, -1, rt5033_devs,
96 ARRAY_SIZE(rt5033_devs), NULL, 0,
97 regmap_irq_get_domain(rt5033->irq_data));
98 if (ret < 0) {
99 dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n");
100 return ret;
101 }
102
103 device_init_wakeup(rt5033->dev, rt5033->wakeup);
104
105 return 0;
106 }
107
108 static const struct i2c_device_id rt5033_i2c_id[] = {
109 { "rt5033", },
110 { }
111 };
112 MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);
113
114 static const struct of_device_id rt5033_dt_match[] = {
115 { .compatible = "richtek,rt5033", },
116 { }
117 };
118 MODULE_DEVICE_TABLE(of, rt5033_dt_match);
119
120 static struct i2c_driver rt5033_driver = {
121 .driver = {
122 .name = "rt5033",
123 .of_match_table = rt5033_dt_match,
124 },
125 .probe_new = rt5033_i2c_probe,
126 .id_table = rt5033_i2c_id,
127 };
128 module_i2c_driver(rt5033_driver);
129
130 MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");
131 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
132 MODULE_LICENSE("GPL");
133