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/mod_devicetable.h>
14 #include <linux/module.h>
15 #include <linux/interrupt.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-led",
45 .of_compatible = "richtek,rt5033-led",
46 },
47 };
48
49 static const struct regmap_config rt5033_regmap_config = {
50 .reg_bits = 8,
51 .val_bits = 8,
52 .max_register = RT5033_REG_END,
53 };
54
rt5033_i2c_probe(struct i2c_client * i2c)55 static int rt5033_i2c_probe(struct i2c_client *i2c)
56 {
57 struct rt5033_dev *rt5033;
58 unsigned int dev_id, chip_rev;
59 int ret;
60
61 rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL);
62 if (!rt5033)
63 return -ENOMEM;
64
65 i2c_set_clientdata(i2c, rt5033);
66 rt5033->dev = &i2c->dev;
67 rt5033->irq = i2c->irq;
68 rt5033->wakeup = true;
69
70 rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config);
71 if (IS_ERR(rt5033->regmap)) {
72 dev_err(&i2c->dev, "Failed to allocate register map.\n");
73 return PTR_ERR(rt5033->regmap);
74 }
75
76 ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id);
77 if (ret) {
78 dev_err(&i2c->dev, "Device not found\n");
79 return -ENODEV;
80 }
81 chip_rev = dev_id & RT5033_CHIP_REV_MASK;
82 dev_info(&i2c->dev, "Device found (rev. %d)\n", chip_rev);
83
84 ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq,
85 IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
86 0, &rt5033_irq_chip, &rt5033->irq_data);
87 if (ret) {
88 dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
89 rt5033->irq, ret);
90 return ret;
91 }
92
93 ret = devm_mfd_add_devices(rt5033->dev, -1, rt5033_devs,
94 ARRAY_SIZE(rt5033_devs), NULL, 0,
95 regmap_irq_get_domain(rt5033->irq_data));
96 if (ret < 0) {
97 dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n");
98 return ret;
99 }
100
101 device_init_wakeup(rt5033->dev, rt5033->wakeup);
102
103 return 0;
104 }
105
106 static const struct i2c_device_id rt5033_i2c_id[] = {
107 { "rt5033", },
108 { }
109 };
110 MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);
111
112 static const struct of_device_id rt5033_dt_match[] = {
113 { .compatible = "richtek,rt5033", },
114 { }
115 };
116 MODULE_DEVICE_TABLE(of, rt5033_dt_match);
117
118 static struct i2c_driver rt5033_driver = {
119 .driver = {
120 .name = "rt5033",
121 .of_match_table = rt5033_dt_match,
122 },
123 .probe = rt5033_i2c_probe,
124 .id_table = rt5033_i2c_id,
125 };
126 module_i2c_driver(rt5033_driver);
127
128 MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");
129 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
130 MODULE_LICENSE("GPL");
131