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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Core driver for TPS61050/61052 boost converters, used for while LED
4 * driving, audio power amplification, white LED flash, and generic
5 * boost conversion. Additionally it provides a 1-bit GPIO pin (out or in)
6 * and a flash synchronization pin to synchronize flash events when used as
7 * flashgun.
8 *
9 * Copyright (C) 2011 ST-Ericsson SA
10 * Written on behalf of Linaro for ST-Ericsson
11 *
12 * Author: Linus Walleij <linus.walleij@linaro.org>
13 */
14
15#include <linux/module.h>
16#include <linux/init.h>
17#include <linux/i2c.h>
18#include <linux/regmap.h>
19#include <linux/gpio.h>
20#include <linux/spinlock.h>
21#include <linux/slab.h>
22#include <linux/err.h>
23#include <linux/mfd/core.h>
24#include <linux/mfd/tps6105x.h>
25
26static struct regmap_config tps6105x_regmap_config = {
27 .reg_bits = 8,
28 .val_bits = 8,
29 .max_register = TPS6105X_REG_3,
30};
31
32static int tps6105x_startup(struct tps6105x *tps6105x)
33{
34 int ret;
35 unsigned int regval;
36
37 ret = regmap_read(tps6105x->regmap, TPS6105X_REG_0, ®val);
38 if (ret)
39 return ret;
40 switch (regval >> TPS6105X_REG0_MODE_SHIFT) {
41 case TPS6105X_REG0_MODE_SHUTDOWN:
42 dev_info(&tps6105x->client->dev,
43 "TPS6105x found in SHUTDOWN mode\n");
44 break;
45 case TPS6105X_REG0_MODE_TORCH:
46 dev_info(&tps6105x->client->dev,
47 "TPS6105x found in TORCH mode\n");
48 break;
49 case TPS6105X_REG0_MODE_TORCH_FLASH:
50 dev_info(&tps6105x->client->dev,
51 "TPS6105x found in FLASH mode\n");
52 break;
53 case TPS6105X_REG0_MODE_VOLTAGE:
54 dev_info(&tps6105x->client->dev,
55 "TPS6105x found in VOLTAGE mode\n");
56 break;
57 default:
58 break;
59 }
60
61 return ret;
62}
63
64/*
65 * MFD cells - we always have a GPIO cell and we have one cell
66 * which is selected operation mode.
67 */
68static struct mfd_cell tps6105x_gpio_cell = {
69 .name = "tps6105x-gpio",
70};
71
72static struct mfd_cell tps6105x_leds_cell = {
73 .name = "tps6105x-leds",
74};
75
76static struct mfd_cell tps6105x_flash_cell = {
77 .name = "tps6105x-flash",
78};
79
80static struct mfd_cell tps6105x_regulator_cell = {
81 .name = "tps6105x-regulator",
82};
83
84static int tps6105x_add_device(struct tps6105x *tps6105x,
85 struct mfd_cell *cell)
86{
87 cell->platform_data = tps6105x;
88 cell->pdata_size = sizeof(*tps6105x);
89
90 return mfd_add_devices(&tps6105x->client->dev,
91 PLATFORM_DEVID_AUTO, cell, 1, NULL, 0, NULL);
92}
93
94static struct tps6105x_platform_data *tps6105x_parse_dt(struct device *dev)
95{
96 struct device_node *np = dev->of_node;
97 struct tps6105x_platform_data *pdata;
98 struct device_node *child;
99
100 if (!np)
101 return ERR_PTR(-EINVAL);
102 if (of_get_available_child_count(np) > 1) {
103 dev_err(dev, "cannot support multiple operational modes");
104 return ERR_PTR(-EINVAL);
105 }
106 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
107 if (!pdata)
108 return ERR_PTR(-ENOMEM);
109 pdata->mode = TPS6105X_MODE_SHUTDOWN;
110 for_each_available_child_of_node(np, child) {
111 if (child->name && !of_node_cmp(child->name, "regulator"))
112 pdata->mode = TPS6105X_MODE_VOLTAGE;
113 else if (child->name && !of_node_cmp(child->name, "led"))
114 pdata->mode = TPS6105X_MODE_TORCH;
115 }
116
117 return pdata;
118}
119
120static int tps6105x_probe(struct i2c_client *client)
121{
122 struct tps6105x *tps6105x;
123 struct tps6105x_platform_data *pdata;
124 int ret;
125
126 pdata = dev_get_platdata(&client->dev);
127 if (!pdata)
128 pdata = tps6105x_parse_dt(&client->dev);
129 if (IS_ERR(pdata)) {
130 dev_err(&client->dev, "No platform data or DT found");
131 return PTR_ERR(pdata);
132 }
133
134 tps6105x = devm_kmalloc(&client->dev, sizeof(*tps6105x), GFP_KERNEL);
135 if (!tps6105x)
136 return -ENOMEM;
137
138 tps6105x->regmap = devm_regmap_init_i2c(client, &tps6105x_regmap_config);
139 if (IS_ERR(tps6105x->regmap))
140 return PTR_ERR(tps6105x->regmap);
141
142 i2c_set_clientdata(client, tps6105x);
143 tps6105x->client = client;
144 tps6105x->pdata = pdata;
145
146 ret = tps6105x_startup(tps6105x);
147 if (ret) {
148 dev_err(&client->dev, "chip initialization failed\n");
149 return ret;
150 }
151
152 ret = tps6105x_add_device(tps6105x, &tps6105x_gpio_cell);
153 if (ret)
154 return ret;
155
156 switch (pdata->mode) {
157 case TPS6105X_MODE_SHUTDOWN:
158 dev_info(&client->dev,
159 "present, not used for anything, only GPIO\n");
160 break;
161 case TPS6105X_MODE_TORCH:
162 ret = tps6105x_add_device(tps6105x, &tps6105x_leds_cell);
163 break;
164 case TPS6105X_MODE_TORCH_FLASH:
165 ret = tps6105x_add_device(tps6105x, &tps6105x_flash_cell);
166 break;
167 case TPS6105X_MODE_VOLTAGE:
168 ret = tps6105x_add_device(tps6105x, &tps6105x_regulator_cell);
169 break;
170 default:
171 dev_warn(&client->dev, "invalid mode: %d\n", pdata->mode);
172 break;
173 }
174
175 if (ret)
176 mfd_remove_devices(&client->dev);
177
178 return ret;
179}
180
181static void tps6105x_remove(struct i2c_client *client)
182{
183 struct tps6105x *tps6105x = i2c_get_clientdata(client);
184
185 mfd_remove_devices(&client->dev);
186
187 /* Put chip in shutdown mode */
188 regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0,
189 TPS6105X_REG0_MODE_MASK,
190 TPS6105X_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT);
191}
192
193static const struct i2c_device_id tps6105x_id[] = {
194 { "tps61050", 0 },
195 { "tps61052", 0 },
196 { }
197};
198MODULE_DEVICE_TABLE(i2c, tps6105x_id);
199
200static const struct of_device_id tps6105x_of_match[] = {
201 { .compatible = "ti,tps61050" },
202 { .compatible = "ti,tps61052" },
203 { },
204};
205MODULE_DEVICE_TABLE(of, tps6105x_of_match);
206
207static struct i2c_driver tps6105x_driver = {
208 .driver = {
209 .name = "tps6105x",
210 .of_match_table = tps6105x_of_match,
211 },
212 .probe = tps6105x_probe,
213 .remove = tps6105x_remove,
214 .id_table = tps6105x_id,
215};
216
217static int __init tps6105x_init(void)
218{
219 return i2c_add_driver(&tps6105x_driver);
220}
221subsys_initcall(tps6105x_init);
222
223static void __exit tps6105x_exit(void)
224{
225 i2c_del_driver(&tps6105x_driver);
226}
227module_exit(tps6105x_exit);
228
229MODULE_AUTHOR("Linus Walleij");
230MODULE_DESCRIPTION("TPS6105x White LED Boost Converter Driver");
231MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Core driver for TPS61050/61052 boost converters, used for while LED
4 * driving, audio power amplification, white LED flash, and generic
5 * boost conversion. Additionally it provides a 1-bit GPIO pin (out or in)
6 * and a flash synchronization pin to synchronize flash events when used as
7 * flashgun.
8 *
9 * Copyright (C) 2011 ST-Ericsson SA
10 * Written on behalf of Linaro for ST-Ericsson
11 *
12 * Author: Linus Walleij <linus.walleij@linaro.org>
13 */
14
15#include <linux/module.h>
16#include <linux/init.h>
17#include <linux/i2c.h>
18#include <linux/regmap.h>
19#include <linux/gpio.h>
20#include <linux/spinlock.h>
21#include <linux/slab.h>
22#include <linux/err.h>
23#include <linux/mfd/core.h>
24#include <linux/mfd/tps6105x.h>
25
26static struct regmap_config tps6105x_regmap_config = {
27 .reg_bits = 8,
28 .val_bits = 8,
29 .max_register = TPS6105X_REG_3,
30};
31
32static int tps6105x_startup(struct tps6105x *tps6105x)
33{
34 int ret;
35 unsigned int regval;
36
37 ret = regmap_read(tps6105x->regmap, TPS6105X_REG_0, ®val);
38 if (ret)
39 return ret;
40 switch (regval >> TPS6105X_REG0_MODE_SHIFT) {
41 case TPS6105X_REG0_MODE_SHUTDOWN:
42 dev_info(&tps6105x->client->dev,
43 "TPS6105x found in SHUTDOWN mode\n");
44 break;
45 case TPS6105X_REG0_MODE_TORCH:
46 dev_info(&tps6105x->client->dev,
47 "TPS6105x found in TORCH mode\n");
48 break;
49 case TPS6105X_REG0_MODE_TORCH_FLASH:
50 dev_info(&tps6105x->client->dev,
51 "TPS6105x found in FLASH mode\n");
52 break;
53 case TPS6105X_REG0_MODE_VOLTAGE:
54 dev_info(&tps6105x->client->dev,
55 "TPS6105x found in VOLTAGE mode\n");
56 break;
57 default:
58 break;
59 }
60
61 return ret;
62}
63
64/*
65 * MFD cells - we always have a GPIO cell and we have one cell
66 * which is selected operation mode.
67 */
68static struct mfd_cell tps6105x_gpio_cell = {
69 .name = "tps6105x-gpio",
70};
71
72static struct mfd_cell tps6105x_leds_cell = {
73 .name = "tps6105x-leds",
74};
75
76static struct mfd_cell tps6105x_flash_cell = {
77 .name = "tps6105x-flash",
78};
79
80static struct mfd_cell tps6105x_regulator_cell = {
81 .name = "tps6105x-regulator",
82};
83
84static int tps6105x_add_device(struct tps6105x *tps6105x,
85 struct mfd_cell *cell)
86{
87 cell->platform_data = tps6105x;
88 cell->pdata_size = sizeof(*tps6105x);
89
90 return mfd_add_devices(&tps6105x->client->dev,
91 PLATFORM_DEVID_AUTO, cell, 1, NULL, 0, NULL);
92}
93
94static struct tps6105x_platform_data *tps6105x_parse_dt(struct device *dev)
95{
96 struct device_node *np = dev->of_node;
97 struct tps6105x_platform_data *pdata;
98 struct device_node *child;
99
100 if (!np)
101 return ERR_PTR(-EINVAL);
102 if (of_get_available_child_count(np) > 1) {
103 dev_err(dev, "cannot support multiple operational modes");
104 return ERR_PTR(-EINVAL);
105 }
106 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
107 if (!pdata)
108 return ERR_PTR(-ENOMEM);
109 pdata->mode = TPS6105X_MODE_SHUTDOWN;
110 for_each_available_child_of_node(np, child) {
111 if (child->name && !of_node_cmp(child->name, "regulator"))
112 pdata->mode = TPS6105X_MODE_VOLTAGE;
113 else if (child->name && !of_node_cmp(child->name, "led"))
114 pdata->mode = TPS6105X_MODE_TORCH;
115 }
116
117 return pdata;
118}
119
120static int tps6105x_probe(struct i2c_client *client)
121{
122 struct tps6105x *tps6105x;
123 struct tps6105x_platform_data *pdata;
124 int ret;
125
126 pdata = dev_get_platdata(&client->dev);
127 if (!pdata)
128 pdata = tps6105x_parse_dt(&client->dev);
129 if (IS_ERR(pdata)) {
130 dev_err(&client->dev, "No platform data or DT found");
131 return PTR_ERR(pdata);
132 }
133
134 tps6105x = devm_kmalloc(&client->dev, sizeof(*tps6105x), GFP_KERNEL);
135 if (!tps6105x)
136 return -ENOMEM;
137
138 tps6105x->regmap = devm_regmap_init_i2c(client, &tps6105x_regmap_config);
139 if (IS_ERR(tps6105x->regmap))
140 return PTR_ERR(tps6105x->regmap);
141
142 i2c_set_clientdata(client, tps6105x);
143 tps6105x->client = client;
144 tps6105x->pdata = pdata;
145
146 ret = tps6105x_startup(tps6105x);
147 if (ret) {
148 dev_err(&client->dev, "chip initialization failed\n");
149 return ret;
150 }
151
152 ret = tps6105x_add_device(tps6105x, &tps6105x_gpio_cell);
153 if (ret)
154 return ret;
155
156 switch (pdata->mode) {
157 case TPS6105X_MODE_SHUTDOWN:
158 dev_info(&client->dev,
159 "present, not used for anything, only GPIO\n");
160 break;
161 case TPS6105X_MODE_TORCH:
162 ret = tps6105x_add_device(tps6105x, &tps6105x_leds_cell);
163 break;
164 case TPS6105X_MODE_TORCH_FLASH:
165 ret = tps6105x_add_device(tps6105x, &tps6105x_flash_cell);
166 break;
167 case TPS6105X_MODE_VOLTAGE:
168 ret = tps6105x_add_device(tps6105x, &tps6105x_regulator_cell);
169 break;
170 default:
171 dev_warn(&client->dev, "invalid mode: %d\n", pdata->mode);
172 break;
173 }
174
175 if (ret)
176 mfd_remove_devices(&client->dev);
177
178 return ret;
179}
180
181static void tps6105x_remove(struct i2c_client *client)
182{
183 struct tps6105x *tps6105x = i2c_get_clientdata(client);
184
185 mfd_remove_devices(&client->dev);
186
187 /* Put chip in shutdown mode */
188 regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0,
189 TPS6105X_REG0_MODE_MASK,
190 TPS6105X_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT);
191}
192
193static const struct i2c_device_id tps6105x_id[] = {
194 { "tps61050", 0 },
195 { "tps61052", 0 },
196 { }
197};
198MODULE_DEVICE_TABLE(i2c, tps6105x_id);
199
200static const struct of_device_id tps6105x_of_match[] = {
201 { .compatible = "ti,tps61050" },
202 { .compatible = "ti,tps61052" },
203 { },
204};
205MODULE_DEVICE_TABLE(of, tps6105x_of_match);
206
207static struct i2c_driver tps6105x_driver = {
208 .driver = {
209 .name = "tps6105x",
210 .of_match_table = tps6105x_of_match,
211 },
212 .probe_new = tps6105x_probe,
213 .remove = tps6105x_remove,
214 .id_table = tps6105x_id,
215};
216
217static int __init tps6105x_init(void)
218{
219 return i2c_add_driver(&tps6105x_driver);
220}
221subsys_initcall(tps6105x_init);
222
223static void __exit tps6105x_exit(void)
224{
225 i2c_del_driver(&tps6105x_driver);
226}
227module_exit(tps6105x_exit);
228
229MODULE_AUTHOR("Linus Walleij");
230MODULE_DESCRIPTION("TPS6105x White LED Boost Converter Driver");
231MODULE_LICENSE("GPL v2");