tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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_RBTREE,
38 .volatile_table = &tps65086_volatile_table,
39};
40
41static const struct regmap_irq tps65086_irqs[] = {
42 REGMAP_IRQ_REG(TPS65086_IRQ_DIETEMP, 0, TPS65086_IRQ_DIETEMP_MASK),
43 REGMAP_IRQ_REG(TPS65086_IRQ_SHUTDN, 0, TPS65086_IRQ_SHUTDN_MASK),
44 REGMAP_IRQ_REG(TPS65086_IRQ_FAULT, 0, TPS65086_IRQ_FAULT_MASK),
45};
46
47static struct regmap_irq_chip tps65086_irq_chip = {
48 .name = "tps65086",
49 .status_base = TPS65086_IRQ,
50 .mask_base = TPS65086_IRQ_MASK,
51 .ack_base = TPS65086_IRQ,
52 .init_ack_masked = true,
53 .num_regs = 1,
54 .irqs = tps65086_irqs,
55 .num_irqs = ARRAY_SIZE(tps65086_irqs),
56};
57
58static const struct of_device_id tps65086_of_match_table[] = {
59 { .compatible = "ti,tps65086", },
60 { /* sentinel */ }
61};
62MODULE_DEVICE_TABLE(of, tps65086_of_match_table);
63
64static int tps65086_probe(struct i2c_client *client)
65{
66 struct tps65086 *tps;
67 unsigned int version;
68 int ret;
69
70 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
71 if (!tps)
72 return -ENOMEM;
73
74 i2c_set_clientdata(client, tps);
75 tps->dev = &client->dev;
76 tps->irq = client->irq;
77
78 tps->regmap = devm_regmap_init_i2c(client, &tps65086_regmap_config);
79 if (IS_ERR(tps->regmap)) {
80 dev_err(tps->dev, "Failed to initialize register map\n");
81 return PTR_ERR(tps->regmap);
82 }
83
84 ret = regmap_read(tps->regmap, TPS65086_DEVICEID, &version);
85 if (ret) {
86 dev_err(tps->dev, "Failed to read revision register\n");
87 return ret;
88 }
89
90 dev_info(tps->dev, "Device: TPS65086%01lX, OTP: %c, Rev: %ld\n",
91 (version & TPS65086_DEVICEID_PART_MASK),
92 (char)((version & TPS65086_DEVICEID_OTP_MASK) >> 4) + 'A',
93 (version & TPS65086_DEVICEID_REV_MASK) >> 6);
94
95 if (tps->irq > 0) {
96 ret = regmap_add_irq_chip(tps->regmap, tps->irq, IRQF_ONESHOT, 0,
97 &tps65086_irq_chip, &tps->irq_data);
98 if (ret) {
99 dev_err(tps->dev, "Failed to register IRQ chip\n");
100 return ret;
101 }
102 }
103
104 ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65086_cells,
105 ARRAY_SIZE(tps65086_cells), NULL, 0,
106 regmap_irq_get_domain(tps->irq_data));
107 if (ret && tps->irq > 0)
108 regmap_del_irq_chip(tps->irq, tps->irq_data);
109
110 return ret;
111}
112
113static void tps65086_remove(struct i2c_client *client)
114{
115 struct tps65086 *tps = i2c_get_clientdata(client);
116
117 if (tps->irq > 0)
118 regmap_del_irq_chip(tps->irq, tps->irq_data);
119}
120
121static const struct i2c_device_id tps65086_id_table[] = {
122 { "tps65086", 0 },
123 { /* sentinel */ }
124};
125MODULE_DEVICE_TABLE(i2c, tps65086_id_table);
126
127static struct i2c_driver tps65086_driver = {
128 .driver = {
129 .name = "tps65086",
130 .of_match_table = tps65086_of_match_table,
131 },
132 .probe_new = tps65086_probe,
133 .remove = tps65086_remove,
134 .id_table = tps65086_id_table,
135};
136module_i2c_driver(tps65086_driver);
137
138MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
139MODULE_DESCRIPTION("TPS65086 PMIC Driver");
140MODULE_LICENSE("GPL v2");