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
16 static const struct mfd_cell tps65086_cells[] = {
17 { .name = "tps65086-regulator", },
18 { .name = "tps65086-gpio", },
19 { .name = "tps65086-reset", },
20 };
21
22 static 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
29 static 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
34 static 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
42 static 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
48 static const 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
59 static const struct of_device_id tps65086_of_match_table[] = {
60 { .compatible = "ti,tps65086", },
61 { /* sentinel */ }
62 };
63 MODULE_DEVICE_TABLE(of, tps65086_of_match_table);
64
tps65086_probe(struct i2c_client * client)65 static 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
tps65086_remove(struct i2c_client * client)121 static 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
129 static const struct i2c_device_id tps65086_id_table[] = {
130 { "tps65086" },
131 { /* sentinel */ }
132 };
133 MODULE_DEVICE_TABLE(i2c, tps65086_id_table);
134
135 static 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 };
144 module_i2c_driver(tps65086_driver);
145
146 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
147 MODULE_DESCRIPTION("TPS65086 PMIC Driver");
148 MODULE_LICENSE("GPL v2");
149