]> git.kernelconcepts.de Git - karo-tx-linux.git/blob - drivers/mfd/rt5033.c
Merge remote-tracking branch 'mfd/for-mfd-next'
[karo-tx-linux.git] / drivers / mfd / rt5033.c
1 /*
2  * MFD core driver for the Richtek RT5033.
3  *
4  * RT5033 comprises multiple sub-devices switcing charger, fuel gauge,
5  * flash LED, current source, LDO and BUCK regulators.
6  *
7  * Copyright (C) 2014 Samsung Electronics, Co., Ltd.
8  * Author: Beomho Seo <beomho.seo@samsung.com>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published bythe Free Software Foundation.
13  */
14
15 #include <linux/err.h>
16 #include <linux/module.h>
17 #include <linux/interrupt.h>
18 #include <linux/of_device.h>
19 #include <linux/mfd/core.h>
20 #include <linux/mfd/rt5033.h>
21 #include <linux/mfd/rt5033-private.h>
22
23 static const struct regmap_irq rt5033_irqs[] = {
24         { .mask = RT5033_PMIC_IRQ_BUCKOCP, },
25         { .mask = RT5033_PMIC_IRQ_BUCKLV, },
26         { .mask = RT5033_PMIC_IRQ_SAFELDOLV, },
27         { .mask = RT5033_PMIC_IRQ_LDOLV, },
28         { .mask = RT5033_PMIC_IRQ_OT, },
29         { .mask = RT5033_PMIC_IRQ_VDDA_UV, },
30 };
31
32 static const struct regmap_irq_chip rt5033_irq_chip = {
33         .name           = "rt5033",
34         .status_base    = RT5033_REG_PMIC_IRQ_STAT,
35         .mask_base      = RT5033_REG_PMIC_IRQ_CTRL,
36         .mask_invert    = true,
37         .num_regs       = 1,
38         .irqs           = rt5033_irqs,
39         .num_irqs       = ARRAY_SIZE(rt5033_irqs),
40 };
41
42 static const struct mfd_cell rt5033_devs[] = {
43         { .name = "rt5033-regulator", },
44         {
45                 .name = "rt5033-charger",
46                 .of_compatible = "richtek,rt5033-charger",
47         }, {
48                 .name = "rt5033-battery",
49                 .of_compatible = "richtek,rt5033-battery",
50         }, {
51                 .name = "rt5033-led",
52                 .of_compatible = "richtek,rt5033-led",
53         },
54 };
55
56 static const struct regmap_config rt5033_regmap_config = {
57         .reg_bits       = 8,
58         .val_bits       = 8,
59         .max_register   = RT5033_REG_END,
60 };
61
62 static int rt5033_i2c_probe(struct i2c_client *i2c,
63                                 const struct i2c_device_id *id)
64 {
65         struct rt5033_dev *rt5033;
66         unsigned int dev_id;
67         int ret;
68
69         rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL);
70         if (!rt5033)
71                 return -ENOMEM;
72
73         i2c_set_clientdata(i2c, rt5033);
74         rt5033->dev = &i2c->dev;
75         rt5033->irq = i2c->irq;
76         rt5033->wakeup = true;
77
78         rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config);
79         if (IS_ERR(rt5033->regmap)) {
80                 dev_err(&i2c->dev, "Failed to allocate register map.\n");
81                 return PTR_ERR(rt5033->regmap);
82         }
83
84         ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id);
85         if (ret) {
86                 dev_err(&i2c->dev, "Device not found\n");
87                 return -ENODEV;
88         }
89         dev_info(&i2c->dev, "Device found Device ID: %04x\n", dev_id);
90
91         ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq,
92                         IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
93                         0, &rt5033_irq_chip, &rt5033->irq_data);
94         if (ret) {
95                 dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
96                                                         rt5033->irq, ret);
97                 return ret;
98         }
99
100         ret = mfd_add_devices(rt5033->dev, -1, rt5033_devs,
101                         ARRAY_SIZE(rt5033_devs), NULL, 0,
102                         regmap_irq_get_domain(rt5033->irq_data));
103         if (ret < 0) {
104                 dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n");
105                 return ret;
106         }
107
108         device_init_wakeup(rt5033->dev, rt5033->wakeup);
109
110         return 0;
111 }
112
113 static int rt5033_i2c_remove(struct i2c_client *i2c)
114 {
115         mfd_remove_devices(&i2c->dev);
116
117         return 0;
118 }
119
120 static const struct i2c_device_id rt5033_i2c_id[] = {
121         { "rt5033", },
122         { }
123 };
124 MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);
125
126 static const struct of_device_id rt5033_dt_match[] = {
127         { .compatible = "richtek,rt5033", },
128         { }
129 };
130 MODULE_DEVICE_TABLE(of, rt5033_dt_match);
131
132 static struct i2c_driver rt5033_driver = {
133         .driver = {
134                 .name = "rt5033",
135                 .of_match_table = of_match_ptr(rt5033_dt_match),
136         },
137         .probe = rt5033_i2c_probe,
138         .remove = rt5033_i2c_remove,
139         .id_table = rt5033_i2c_id,
140 };
141 module_i2c_driver(rt5033_driver);
142
143 MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");
144 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
145 MODULE_LICENSE("GPL");