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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/
4 *
5 * Author: Keerthy <j-keerthy@ti.com>
6 */
7
8#include <linux/interrupt.h>
9#include <linux/mfd/core.h>
10#include <linux/module.h>
11#include <linux/of_device.h>
12#include <linux/regmap.h>
13
14#include <linux/mfd/lp87565.h>
15
16static const struct regmap_config lp87565_regmap_config = {
17 .reg_bits = 8,
18 .val_bits = 8,
19 .max_register = LP87565_REG_MAX,
20};
21
22static const struct mfd_cell lp87565_cells[] = {
23 { .name = "lp87565-q1-regulator", },
24 { .name = "lp87565-q1-gpio", },
25};
26
27static const struct of_device_id of_lp87565_match_table[] = {
28 { .compatible = "ti,lp87565", },
29 {
30 .compatible = "ti,lp87565-q1",
31 .data = (void *)LP87565_DEVICE_TYPE_LP87565_Q1,
32 },
33 {
34 .compatible = "ti,lp87561-q1",
35 .data = (void *)LP87565_DEVICE_TYPE_LP87561_Q1,
36 },
37 {}
38};
39MODULE_DEVICE_TABLE(of, of_lp87565_match_table);
40
41static int lp87565_probe(struct i2c_client *client,
42 const struct i2c_device_id *ids)
43{
44 struct lp87565 *lp87565;
45 const struct of_device_id *of_id;
46 int ret;
47 unsigned int otpid;
48
49 lp87565 = devm_kzalloc(&client->dev, sizeof(*lp87565), GFP_KERNEL);
50 if (!lp87565)
51 return -ENOMEM;
52
53 lp87565->dev = &client->dev;
54
55 lp87565->regmap = devm_regmap_init_i2c(client, &lp87565_regmap_config);
56 if (IS_ERR(lp87565->regmap)) {
57 ret = PTR_ERR(lp87565->regmap);
58 dev_err(lp87565->dev,
59 "Failed to initialize register map: %d\n", ret);
60 return ret;
61 }
62
63 ret = regmap_read(lp87565->regmap, LP87565_REG_OTP_REV, &otpid);
64 if (ret) {
65 dev_err(lp87565->dev, "Failed to read OTP ID\n");
66 return ret;
67 }
68
69 lp87565->rev = otpid & LP87565_OTP_REV_OTP_ID;
70
71 of_id = of_match_device(of_lp87565_match_table, &client->dev);
72 if (of_id)
73 lp87565->dev_type = (enum lp87565_device_type)of_id->data;
74
75 i2c_set_clientdata(client, lp87565);
76
77 return devm_mfd_add_devices(lp87565->dev, PLATFORM_DEVID_AUTO,
78 lp87565_cells, ARRAY_SIZE(lp87565_cells),
79 NULL, 0, NULL);
80}
81
82static const struct i2c_device_id lp87565_id_table[] = {
83 { "lp87565-q1", 0 },
84 { },
85};
86MODULE_DEVICE_TABLE(i2c, lp87565_id_table);
87
88static struct i2c_driver lp87565_driver = {
89 .driver = {
90 .name = "lp87565",
91 .of_match_table = of_lp87565_match_table,
92 },
93 .probe = lp87565_probe,
94 .id_table = lp87565_id_table,
95};
96module_i2c_driver(lp87565_driver);
97
98MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
99MODULE_DESCRIPTION("lp87565 chip family Multi-Function Device driver");
100MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/
4 *
5 * Author: Keerthy <j-keerthy@ti.com>
6 */
7
8#include <linux/gpio/consumer.h>
9#include <linux/interrupt.h>
10#include <linux/mfd/core.h>
11#include <linux/module.h>
12#include <linux/of_device.h>
13#include <linux/regmap.h>
14
15#include <linux/mfd/lp87565.h>
16
17static const struct regmap_config lp87565_regmap_config = {
18 .reg_bits = 8,
19 .val_bits = 8,
20 .max_register = LP87565_REG_MAX,
21};
22
23static const struct mfd_cell lp87565_cells[] = {
24 { .name = "lp87565-q1-regulator", },
25 { .name = "lp87565-q1-gpio", },
26};
27
28static const struct of_device_id of_lp87565_match_table[] = {
29 { .compatible = "ti,lp87565", },
30 {
31 .compatible = "ti,lp87524-q1",
32 .data = (void *)LP87565_DEVICE_TYPE_LP87524_Q1,
33 },
34 {
35 .compatible = "ti,lp87565-q1",
36 .data = (void *)LP87565_DEVICE_TYPE_LP87565_Q1,
37 },
38 {
39 .compatible = "ti,lp87561-q1",
40 .data = (void *)LP87565_DEVICE_TYPE_LP87561_Q1,
41 },
42 {}
43};
44MODULE_DEVICE_TABLE(of, of_lp87565_match_table);
45
46static int lp87565_probe(struct i2c_client *client)
47{
48 struct lp87565 *lp87565;
49 const struct of_device_id *of_id;
50 int ret;
51 unsigned int otpid;
52
53 lp87565 = devm_kzalloc(&client->dev, sizeof(*lp87565), GFP_KERNEL);
54 if (!lp87565)
55 return -ENOMEM;
56
57 lp87565->dev = &client->dev;
58
59 lp87565->regmap = devm_regmap_init_i2c(client, &lp87565_regmap_config);
60 if (IS_ERR(lp87565->regmap)) {
61 ret = PTR_ERR(lp87565->regmap);
62 dev_err(lp87565->dev,
63 "Failed to initialize register map: %d\n", ret);
64 return ret;
65 }
66
67 lp87565->reset_gpio = devm_gpiod_get_optional(lp87565->dev, "reset",
68 GPIOD_OUT_LOW);
69 if (IS_ERR(lp87565->reset_gpio)) {
70 ret = PTR_ERR(lp87565->reset_gpio);
71 if (ret == -EPROBE_DEFER)
72 return ret;
73 }
74
75 if (lp87565->reset_gpio) {
76 gpiod_set_value_cansleep(lp87565->reset_gpio, 1);
77 /* The minimum assertion time is undocumented, just guess */
78 usleep_range(2000, 4000);
79
80 gpiod_set_value_cansleep(lp87565->reset_gpio, 0);
81 /* Min 1.2 ms before first I2C transaction */
82 usleep_range(1500, 3000);
83 }
84
85 ret = regmap_read(lp87565->regmap, LP87565_REG_OTP_REV, &otpid);
86 if (ret) {
87 dev_err(lp87565->dev, "Failed to read OTP ID\n");
88 return ret;
89 }
90
91 lp87565->rev = otpid & LP87565_OTP_REV_OTP_ID;
92
93 of_id = of_match_device(of_lp87565_match_table, &client->dev);
94 if (of_id)
95 lp87565->dev_type = (enum lp87565_device_type)of_id->data;
96
97 i2c_set_clientdata(client, lp87565);
98
99 return devm_mfd_add_devices(lp87565->dev, PLATFORM_DEVID_AUTO,
100 lp87565_cells, ARRAY_SIZE(lp87565_cells),
101 NULL, 0, NULL);
102}
103
104static void lp87565_shutdown(struct i2c_client *client)
105{
106 struct lp87565 *lp87565 = i2c_get_clientdata(client);
107
108 gpiod_set_value_cansleep(lp87565->reset_gpio, 1);
109}
110
111static const struct i2c_device_id lp87565_id_table[] = {
112 { "lp87565-q1", 0 },
113 { },
114};
115MODULE_DEVICE_TABLE(i2c, lp87565_id_table);
116
117static struct i2c_driver lp87565_driver = {
118 .driver = {
119 .name = "lp87565",
120 .of_match_table = of_lp87565_match_table,
121 },
122 .probe_new = lp87565_probe,
123 .shutdown = lp87565_shutdown,
124 .id_table = lp87565_id_table,
125};
126module_i2c_driver(lp87565_driver);
127
128MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
129MODULE_DESCRIPTION("lp87565 chip family Multi-Function Device driver");
130MODULE_LICENSE("GPL v2");