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 | |
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(dev: &i2c->dev, size: sizeof(*rt5033), GFP_KERNEL); |
62 | if (!rt5033) |
63 | return -ENOMEM; |
64 | |
65 | i2c_set_clientdata(client: i2c, data: 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(ptr: rt5033->regmap)) { |
72 | dev_err(&i2c->dev, "Failed to allocate register map.\n" ); |
73 | return PTR_ERR(ptr: rt5033->regmap); |
74 | } |
75 | |
76 | ret = regmap_read(map: rt5033->regmap, reg: RT5033_REG_DEVICE_ID, val: &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(map: rt5033->regmap, irq: rt5033->irq, |
85 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
86 | irq_base: 0, chip: &rt5033_irq_chip, data: &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(dev: rt5033->dev, id: -1, cells: rt5033_devs, |
94 | ARRAY_SIZE(rt5033_devs), NULL, irq_base: 0, |
95 | irq_domain: regmap_irq_get_domain(data: 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(dev: rt5033->dev, enable: 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 | |