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 .mask_base = RT5033_REG_PMIC_IRQ_CTRL,
33 .mask_invert = true,
34 .num_regs = 1,
35 .irqs = rt5033_irqs,
36 .num_irqs = ARRAY_SIZE(rt5033_irqs),
37 };
38
39 static const struct mfd_cell rt5033_devs[] = {
40 { .name = "rt5033-regulator", },
41 {
42 .name = "rt5033-charger",
43 .of_compatible = "richtek,rt5033-charger",
44 }, {
45 .name = "rt5033-battery",
46 .of_compatible = "richtek,rt5033-battery",
47 }, {
48 .name = "rt5033-led",
49 .of_compatible = "richtek,rt5033-led",
50 },
51 };
52
53 static const struct regmap_config rt5033_regmap_config = {
54 .reg_bits = 8,
55 .val_bits = 8,
56 .max_register = RT5033_REG_END,
57 };
58
rt5033_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)59 static int rt5033_i2c_probe(struct i2c_client *i2c,
60 const struct i2c_device_id *id)
61 {
62 struct rt5033_dev *rt5033;
63 unsigned int dev_id;
64 int ret;
65
66 rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL);
67 if (!rt5033)
68 return -ENOMEM;
69
70 i2c_set_clientdata(i2c, rt5033);
71 rt5033->dev = &i2c->dev;
72 rt5033->irq = i2c->irq;
73 rt5033->wakeup = true;
74
75 rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config);
76 if (IS_ERR(rt5033->regmap)) {
77 dev_err(&i2c->dev, "Failed to allocate register map.\n");
78 return PTR_ERR(rt5033->regmap);
79 }
80
81 ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id);
82 if (ret) {
83 dev_err(&i2c->dev, "Device not found\n");
84 return -ENODEV;
85 }
86 dev_info(&i2c->dev, "Device found Device ID: %04x\n", dev_id);
87
88 ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq,
89 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
90 0, &rt5033_irq_chip, &rt5033->irq_data);
91 if (ret) {
92 dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
93 rt5033->irq, ret);
94 return ret;
95 }
96
97 ret = devm_mfd_add_devices(rt5033->dev, -1, rt5033_devs,
98 ARRAY_SIZE(rt5033_devs), NULL, 0,
99 regmap_irq_get_domain(rt5033->irq_data));
100 if (ret < 0) {
101 dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n");
102 return ret;
103 }
104
105 device_init_wakeup(rt5033->dev, rt5033->wakeup);
106
107 return 0;
108 }
109
110 static const struct i2c_device_id rt5033_i2c_id[] = {
111 { "rt5033", },
112 { }
113 };
114 MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);
115
116 static const struct of_device_id rt5033_dt_match[] = {
117 { .compatible = "richtek,rt5033", },
118 { }
119 };
120 MODULE_DEVICE_TABLE(of, rt5033_dt_match);
121
122 static struct i2c_driver rt5033_driver = {
123 .driver = {
124 .name = "rt5033",
125 .of_match_table = of_match_ptr(rt5033_dt_match),
126 },
127 .probe = rt5033_i2c_probe,
128 .id_table = rt5033_i2c_id,
129 };
130 module_i2c_driver(rt5033_driver);
131
132 MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");
133 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
134 MODULE_LICENSE("GPL");
135