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(&client->dev, sizeof(*tps), GFP_KERNEL);
72	if (!tps)
73		return -ENOMEM;
74
75	i2c_set_clientdata(client, 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(tps->regmap)) {
81		dev_err(tps->dev, "Failed to initialize register map\n");
82		return PTR_ERR(tps->regmap);
83	}
84
85	/* Store device ID to load regulator configuration that fit to IC variant */
86	ret = regmap_read(tps->regmap, TPS65086_DEVICEID1, &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(tps->regmap, TPS65086_DEVICEID2, &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(tps->regmap, tps->irq, IRQF_ONESHOT, 0,
105					  &tps65086_irq_chip, &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(tps->dev, PLATFORM_DEVID_AUTO, tps65086_cells,
113			      ARRAY_SIZE(tps65086_cells), NULL, 0,
114			      regmap_irq_get_domain(tps->irq_data));
115	if (ret && tps->irq > 0)
116		regmap_del_irq_chip(tps->irq, 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(tps->irq, 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