Merge tag 'v5.11-rc1' into asoc-5.11
[linux-2.6-microblaze.git] / drivers / mfd / rt5033.c
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
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 = 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");