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