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 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 | |
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(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 | |
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(irq: tps->irq, data: tps->irq_data); |
127 | } |
128 | |
129 | static const struct i2c_device_id tps65086_id_table[] = { |
130 | { "tps65086" , 0 }, |
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 | |