1/*
2 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
3 * Andrew F. Davis <afd@ti.com>
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
10 * kind, whether expressed or implied; without even the implied warranty
11 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License version 2 for more details.
13 *
14 * Based on the TPS65912 driver
15 */
16
17#include <linux/i2c.h>
18#include <linux/interrupt.h>
19#include <linux/mfd/core.h>
20#include <linux/module.h>
21
22#include <linux/mfd/tps65086.h>
23
24static const struct mfd_cell tps65086_cells[] = {
25 { .name = "tps65086-regulator", },
26 { .name = "tps65086-gpio", },
27};
28
29static const struct regmap_range tps65086_yes_ranges[] = {
30 regmap_reg_range(TPS65086_IRQ, TPS65086_IRQ),
31 regmap_reg_range(TPS65086_PMICSTAT, TPS65086_SHUTDNSRC),
32 regmap_reg_range(TPS65086_GPOCTRL, TPS65086_GPOCTRL),
33 regmap_reg_range(TPS65086_PG_STATUS1, TPS65086_OC_STATUS),
34};
35
36static const struct regmap_access_table tps65086_volatile_table = {
37 .yes_ranges = tps65086_yes_ranges,
38 .n_yes_ranges = ARRAY_SIZE(tps65086_yes_ranges),
39};
40
41static const struct regmap_config tps65086_regmap_config = {
42 .reg_bits = 8,
43 .val_bits = 8,
44 .cache_type = REGCACHE_RBTREE,
45 .volatile_table = &tps65086_volatile_table,
46};
47
48static const struct regmap_irq tps65086_irqs[] = {
49 REGMAP_IRQ_REG(TPS65086_IRQ_DIETEMP, 0, TPS65086_IRQ_DIETEMP_MASK),
50 REGMAP_IRQ_REG(TPS65086_IRQ_SHUTDN, 0, TPS65086_IRQ_SHUTDN_MASK),
51 REGMAP_IRQ_REG(TPS65086_IRQ_FAULT, 0, TPS65086_IRQ_FAULT_MASK),
52};
53
54static struct regmap_irq_chip tps65086_irq_chip = {
55 .name = "tps65086",
56 .status_base = TPS65086_IRQ,
57 .mask_base = TPS65086_IRQ_MASK,
58 .ack_base = TPS65086_IRQ,
59 .init_ack_masked = true,
60 .num_regs = 1,
61 .irqs = tps65086_irqs,
62 .num_irqs = ARRAY_SIZE(tps65086_irqs),
63};
64
65static const struct of_device_id tps65086_of_match_table[] = {
66 { .compatible = "ti,tps65086", },
67 { /* sentinel */ }
68};
69MODULE_DEVICE_TABLE(of, tps65086_of_match_table);
70
71static int tps65086_probe(struct i2c_client *client,
72 const struct i2c_device_id *ids)
73{
74 struct tps65086 *tps;
75 unsigned int version;
76 int ret;
77
78 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
79 if (!tps)
80 return -ENOMEM;
81
82 i2c_set_clientdata(client, tps);
83 tps->dev = &client->dev;
84 tps->irq = client->irq;
85
86 tps->regmap = devm_regmap_init_i2c(client, &tps65086_regmap_config);
87 if (IS_ERR(tps->regmap)) {
88 dev_err(tps->dev, "Failed to initialize register map\n");
89 return PTR_ERR(tps->regmap);
90 }
91
92 ret = regmap_read(tps->regmap, TPS65086_DEVICEID, &version);
93 if (ret) {
94 dev_err(tps->dev, "Failed to read revision register\n");
95 return ret;
96 }
97
98 dev_info(tps->dev, "Device: TPS65086%01lX, OTP: %c, Rev: %ld\n",
99 (version & TPS65086_DEVICEID_PART_MASK),
100 (char)((version & TPS65086_DEVICEID_OTP_MASK) >> 4) + 'A',
101 (version & TPS65086_DEVICEID_REV_MASK) >> 6);
102
103 ret = regmap_add_irq_chip(tps->regmap, tps->irq, IRQF_ONESHOT, 0,
104 &tps65086_irq_chip, &tps->irq_data);
105 if (ret) {
106 dev_err(tps->dev, "Failed to register IRQ chip\n");
107 return ret;
108 }
109
110 ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65086_cells,
111 ARRAY_SIZE(tps65086_cells), NULL, 0,
112 regmap_irq_get_domain(tps->irq_data));
113 if (ret) {
114 regmap_del_irq_chip(tps->irq, tps->irq_data);
115 return ret;
116 }
117
118 return 0;
119}
120
121static int tps65086_remove(struct i2c_client *client)
122{
123 struct tps65086 *tps = i2c_get_clientdata(client);
124
125 regmap_del_irq_chip(tps->irq, tps->irq_data);
126
127 return 0;
128}
129
130static const struct i2c_device_id tps65086_id_table[] = {
131 { "tps65086", 0 },
132 { /* sentinel */ }
133};
134MODULE_DEVICE_TABLE(i2c, tps65086_id_table);
135
136static struct i2c_driver tps65086_driver = {
137 .driver = {
138 .name = "tps65086",
139 .of_match_table = tps65086_of_match_table,
140 },
141 .probe = tps65086_probe,
142 .remove = tps65086_remove,
143 .id_table = tps65086_id_table,
144};
145module_i2c_driver(tps65086_driver);
146
147MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
148MODULE_DESCRIPTION("TPS65086 PMIC Driver");
149MODULE_LICENSE("GPL v2");
150