1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
4 * Andrew F. Davis <afd@ti.com>
5 *
6 * Based on the TPS65912 driver
7 */
8
9#include <linux/i2c.h>
10#include <linux/interrupt.h>
11#include <linux/mfd/core.h>
12#include <linux/module.h>
13
14#include <linux/mfd/tps65086.h>
15
16static const struct mfd_cell tps65086_cells[] = {
17 { .name = "tps65086-regulator", },
18 { .name = "tps65086-gpio", },
19 { .name = "tps65086-reset", },
20};
21
22static const struct regmap_range tps65086_yes_ranges[] = {
23 regmap_reg_range(TPS65086_IRQ, TPS65086_IRQ),
24 regmap_reg_range(TPS65086_PMICSTAT, TPS65086_SHUTDNSRC),
25 regmap_reg_range(TPS65086_GPOCTRL, TPS65086_GPOCTRL),
26 regmap_reg_range(TPS65086_PG_STATUS1, TPS65086_OC_STATUS),
27};
28
29static const struct regmap_access_table tps65086_volatile_table = {
30 .yes_ranges = tps65086_yes_ranges,
31 .n_yes_ranges = ARRAY_SIZE(tps65086_yes_ranges),
32};
33
34static const struct regmap_config tps65086_regmap_config = {
35 .reg_bits = 8,
36 .val_bits = 8,
37 .cache_type = REGCACHE_MAPLE,
38 .volatile_table = &tps65086_volatile_table,
39 .max_register = TPS65086_OC_STATUS,
40};
41
42static const struct regmap_irq tps65086_irqs[] = {
43 REGMAP_IRQ_REG(TPS65086_IRQ_DIETEMP, 0, TPS65086_IRQ_DIETEMP_MASK),
44 REGMAP_IRQ_REG(TPS65086_IRQ_SHUTDN, 0, TPS65086_IRQ_SHUTDN_MASK),
45 REGMAP_IRQ_REG(TPS65086_IRQ_FAULT, 0, TPS65086_IRQ_FAULT_MASK),
46};
47
48static struct regmap_irq_chip tps65086_irq_chip = {
49 .name = "tps65086",
50 .status_base = TPS65086_IRQ,
51 .mask_base = TPS65086_IRQ_MASK,
52 .ack_base = TPS65086_IRQ,
53 .init_ack_masked = true,
54 .num_regs = 1,
55 .irqs = tps65086_irqs,
56 .num_irqs = ARRAY_SIZE(tps65086_irqs),
57};
58
59static const struct of_device_id tps65086_of_match_table[] = {
60 { .compatible = "ti,tps65086", },
61 { /* sentinel */ }
62};
63MODULE_DEVICE_TABLE(of, tps65086_of_match_table);
64
65static int tps65086_probe(struct i2c_client *client)
66{
67 struct tps65086 *tps;
68 unsigned int version;
69 int ret;
70
71 tps = devm_kzalloc(dev: &client->dev, size: sizeof(*tps), GFP_KERNEL);
72 if (!tps)
73 return -ENOMEM;
74
75 i2c_set_clientdata(client, data: tps);
76 tps->dev = &client->dev;
77 tps->irq = client->irq;
78
79 tps->regmap = devm_regmap_init_i2c(client, &tps65086_regmap_config);
80 if (IS_ERR(ptr: tps->regmap)) {
81 dev_err(tps->dev, "Failed to initialize register map\n");
82 return PTR_ERR(ptr: tps->regmap);
83 }
84
85 /* Store device ID to load regulator configuration that fit to IC variant */
86 ret = regmap_read(map: tps->regmap, TPS65086_DEVICEID1, val: &tps->chip_id);
87 if (ret) {
88 dev_err(tps->dev, "Failed to read revision register 1\n");
89 return ret;
90 }
91
92 ret = regmap_read(map: tps->regmap, TPS65086_DEVICEID2, val: &version);
93 if (ret) {
94 dev_err(tps->dev, "Failed to read revision register 2\n");
95 return ret;
96 }
97
98 dev_info(tps->dev, "Device: TPS65086%01lX, OTP: %c, Rev: %ld\n",
99 (version & TPS65086_DEVICEID2_PART_MASK),
100 (char)((version & TPS65086_DEVICEID2_OTP_MASK) >> 4) + 'A',
101 (version & TPS65086_DEVICEID2_REV_MASK) >> 6);
102
103 if (tps->irq > 0) {
104 ret = regmap_add_irq_chip(map: tps->regmap, irq: tps->irq, IRQF_ONESHOT, irq_base: 0,
105 chip: &tps65086_irq_chip, data: &tps->irq_data);
106 if (ret) {
107 dev_err(tps->dev, "Failed to register IRQ chip\n");
108 return ret;
109 }
110 }
111
112 ret = mfd_add_devices(parent: tps->dev, PLATFORM_DEVID_AUTO, cells: tps65086_cells,
113 ARRAY_SIZE(tps65086_cells), NULL, irq_base: 0,
114 irq_domain: regmap_irq_get_domain(data: tps->irq_data));
115 if (ret && tps->irq > 0)
116 regmap_del_irq_chip(irq: tps->irq, data: tps->irq_data);
117
118 return ret;
119}
120
121static void tps65086_remove(struct i2c_client *client)
122{
123 struct tps65086 *tps = i2c_get_clientdata(client);
124
125 if (tps->irq > 0)
126 regmap_del_irq_chip(irq: tps->irq, data: tps->irq_data);
127}
128
129static const struct i2c_device_id tps65086_id_table[] = {
130 { "tps65086", 0 },
131 { /* sentinel */ }
132};
133MODULE_DEVICE_TABLE(i2c, tps65086_id_table);
134
135static struct i2c_driver tps65086_driver = {
136 .driver = {
137 .name = "tps65086",
138 .of_match_table = tps65086_of_match_table,
139 },
140 .probe = tps65086_probe,
141 .remove = tps65086_remove,
142 .id_table = tps65086_id_table,
143};
144module_i2c_driver(tps65086_driver);
145
146MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
147MODULE_DESCRIPTION("TPS65086 PMIC Driver");
148MODULE_LICENSE("GPL v2");
149

source code of linux/drivers/mfd/tps65086.c