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d925da5c | 1 | // SPDX-License-Identifier: GPL-2.0-only |
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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> | |
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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", | |
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47 | }, { |
48 | .name = "rt5033-led", | |
49 | .of_compatible = "richtek,rt5033-led", | |
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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 | ||
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 | ||
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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)); | |
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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 | ||
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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 | }; | |
4895e493 | 120 | MODULE_DEVICE_TABLE(of, rt5033_dt_match); |
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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, | |
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128 | .id_table = rt5033_i2c_id, |
129 | }; | |
130 | module_i2c_driver(rt5033_driver); | |
131 | ||
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132 | MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver"); |
133 | MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>"); | |
134 | MODULE_LICENSE("GPL"); |