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1/*
2 * Core driver for TPS61050/61052 boost converters, used for while LED
3 * driving, audio power amplification, white LED flash, and generic
4 * boost conversion. Additionally it provides a 1-bit GPIO pin (out or in)
5 * and a flash synchronization pin to synchronize flash events when used as
6 * flashgun.
7 *
8 * Copyright (C) 2011 ST-Ericsson SA
9 * Written on behalf of Linaro for ST-Ericsson
10 *
11 * Author: Linus Walleij <linus.walleij@linaro.org>
12 *
13 * License terms: GNU General Public License (GPL) version 2
14 */
15
16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/i2c.h>
19#include <linux/mutex.h>
20#include <linux/gpio.h>
21#include <linux/spinlock.h>
22#include <linux/slab.h>
23#include <linux/err.h>
24#include <linux/regulator/driver.h>
25#include <linux/mfd/core.h>
26#include <linux/mfd/tps6105x.h>
27
28int tps6105x_set(struct tps6105x *tps6105x, u8 reg, u8 value)
29{
30 int ret;
31
32 ret = mutex_lock_interruptible(&tps6105x->lock);
33 if (ret)
34 return ret;
35 ret = i2c_smbus_write_byte_data(tps6105x->client, reg, value);
36 mutex_unlock(&tps6105x->lock);
37 if (ret < 0)
38 return ret;
39
40 return 0;
41}
42EXPORT_SYMBOL(tps6105x_set);
43
44int tps6105x_get(struct tps6105x *tps6105x, u8 reg, u8 *buf)
45{
46 int ret;
47
48 ret = mutex_lock_interruptible(&tps6105x->lock);
49 if (ret)
50 return ret;
51 ret = i2c_smbus_read_byte_data(tps6105x->client, reg);
52 mutex_unlock(&tps6105x->lock);
53 if (ret < 0)
54 return ret;
55
56 *buf = ret;
57 return 0;
58}
59EXPORT_SYMBOL(tps6105x_get);
60
61/*
62 * Masks off the bits in the mask and sets the bits in the bitvalues
63 * parameter in one atomic operation
64 */
65int tps6105x_mask_and_set(struct tps6105x *tps6105x, u8 reg,
66 u8 bitmask, u8 bitvalues)
67{
68 int ret;
69 u8 regval;
70
71 ret = mutex_lock_interruptible(&tps6105x->lock);
72 if (ret)
73 return ret;
74 ret = i2c_smbus_read_byte_data(tps6105x->client, reg);
75 if (ret < 0)
76 goto fail;
77 regval = ret;
78 regval = (~bitmask & regval) | (bitmask & bitvalues);
79 ret = i2c_smbus_write_byte_data(tps6105x->client, reg, regval);
80fail:
81 mutex_unlock(&tps6105x->lock);
82 if (ret < 0)
83 return ret;
84
85 return 0;
86}
87EXPORT_SYMBOL(tps6105x_mask_and_set);
88
89static int __devinit tps6105x_startup(struct tps6105x *tps6105x)
90{
91 int ret;
92 u8 regval;
93
94 ret = tps6105x_get(tps6105x, TPS6105X_REG_0, ®val);
95 if (ret)
96 return ret;
97 switch (regval >> TPS6105X_REG0_MODE_SHIFT) {
98 case TPS6105X_REG0_MODE_SHUTDOWN:
99 dev_info(&tps6105x->client->dev,
100 "TPS6105x found in SHUTDOWN mode\n");
101 break;
102 case TPS6105X_REG0_MODE_TORCH:
103 dev_info(&tps6105x->client->dev,
104 "TPS6105x found in TORCH mode\n");
105 break;
106 case TPS6105X_REG0_MODE_TORCH_FLASH:
107 dev_info(&tps6105x->client->dev,
108 "TPS6105x found in FLASH mode\n");
109 break;
110 case TPS6105X_REG0_MODE_VOLTAGE:
111 dev_info(&tps6105x->client->dev,
112 "TPS6105x found in VOLTAGE mode\n");
113 break;
114 default:
115 break;
116 }
117
118 return ret;
119}
120
121/*
122 * MFD cells - we have one cell which is selected operation
123 * mode, and we always have a GPIO cell.
124 */
125static struct mfd_cell tps6105x_cells[] = {
126 {
127 /* name will be runtime assigned */
128 .id = -1,
129 },
130 {
131 .name = "tps6105x-gpio",
132 .id = -1,
133 },
134};
135
136static int __devinit tps6105x_probe(struct i2c_client *client,
137 const struct i2c_device_id *id)
138{
139 struct tps6105x *tps6105x;
140 struct tps6105x_platform_data *pdata;
141 int ret;
142 int i;
143
144 tps6105x = kmalloc(sizeof(*tps6105x), GFP_KERNEL);
145 if (!tps6105x)
146 return -ENOMEM;
147
148 i2c_set_clientdata(client, tps6105x);
149 tps6105x->client = client;
150 pdata = client->dev.platform_data;
151 tps6105x->pdata = pdata;
152 mutex_init(&tps6105x->lock);
153
154 ret = tps6105x_startup(tps6105x);
155 if (ret) {
156 dev_err(&client->dev, "chip initialization failed\n");
157 goto fail;
158 }
159
160 /* Remove warning texts when you implement new cell drivers */
161 switch (pdata->mode) {
162 case TPS6105X_MODE_SHUTDOWN:
163 dev_info(&client->dev,
164 "present, not used for anything, only GPIO\n");
165 break;
166 case TPS6105X_MODE_TORCH:
167 tps6105x_cells[0].name = "tps6105x-leds";
168 dev_warn(&client->dev,
169 "torch mode is unsupported\n");
170 break;
171 case TPS6105X_MODE_TORCH_FLASH:
172 tps6105x_cells[0].name = "tps6105x-flash";
173 dev_warn(&client->dev,
174 "flash mode is unsupported\n");
175 break;
176 case TPS6105X_MODE_VOLTAGE:
177 tps6105x_cells[0].name ="tps6105x-regulator";
178 break;
179 default:
180 break;
181 }
182
183 /* Set up and register the platform devices. */
184 for (i = 0; i < ARRAY_SIZE(tps6105x_cells); i++) {
185 /* One state holder for all drivers, this is simple */
186 tps6105x_cells[i].platform_data = tps6105x;
187 tps6105x_cells[i].pdata_size = sizeof(*tps6105x);
188 }
189
190 ret = mfd_add_devices(&client->dev, 0, tps6105x_cells,
191 ARRAY_SIZE(tps6105x_cells), NULL, 0);
192 if (ret)
193 goto fail;
194
195 return 0;
196
197fail:
198 kfree(tps6105x);
199 return ret;
200}
201
202static int __devexit tps6105x_remove(struct i2c_client *client)
203{
204 struct tps6105x *tps6105x = i2c_get_clientdata(client);
205
206 mfd_remove_devices(&client->dev);
207
208 /* Put chip in shutdown mode */
209 tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
210 TPS6105X_REG0_MODE_MASK,
211 TPS6105X_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT);
212
213 kfree(tps6105x);
214 return 0;
215}
216
217static const struct i2c_device_id tps6105x_id[] = {
218 { "tps61050", 0 },
219 { "tps61052", 0 },
220 { }
221};
222MODULE_DEVICE_TABLE(i2c, tps6105x_id);
223
224static struct i2c_driver tps6105x_driver = {
225 .driver = {
226 .name = "tps6105x",
227 },
228 .probe = tps6105x_probe,
229 .remove = __devexit_p(tps6105x_remove),
230 .id_table = tps6105x_id,
231};
232
233static int __init tps6105x_init(void)
234{
235 return i2c_add_driver(&tps6105x_driver);
236}
237subsys_initcall(tps6105x_init);
238
239static void __exit tps6105x_exit(void)
240{
241 i2c_del_driver(&tps6105x_driver);
242}
243module_exit(tps6105x_exit);
244
245MODULE_AUTHOR("Linus Walleij");
246MODULE_DESCRIPTION("TPS6105x White LED Boost Converter Driver");
247MODULE_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 const struct i2c_device_id *id)
122{
123 struct tps6105x *tps6105x;
124 struct tps6105x_platform_data *pdata;
125 int ret;
126
127 pdata = dev_get_platdata(&client->dev);
128 if (!pdata)
129 pdata = tps6105x_parse_dt(&client->dev);
130 if (IS_ERR(pdata)) {
131 dev_err(&client->dev, "No platform data or DT found");
132 return PTR_ERR(pdata);
133 }
134
135 tps6105x = devm_kmalloc(&client->dev, sizeof(*tps6105x), GFP_KERNEL);
136 if (!tps6105x)
137 return -ENOMEM;
138
139 tps6105x->regmap = devm_regmap_init_i2c(client, &tps6105x_regmap_config);
140 if (IS_ERR(tps6105x->regmap))
141 return PTR_ERR(tps6105x->regmap);
142
143 i2c_set_clientdata(client, tps6105x);
144 tps6105x->client = client;
145 tps6105x->pdata = pdata;
146
147 ret = tps6105x_startup(tps6105x);
148 if (ret) {
149 dev_err(&client->dev, "chip initialization failed\n");
150 return ret;
151 }
152
153 ret = tps6105x_add_device(tps6105x, &tps6105x_gpio_cell);
154 if (ret)
155 return ret;
156
157 switch (pdata->mode) {
158 case TPS6105X_MODE_SHUTDOWN:
159 dev_info(&client->dev,
160 "present, not used for anything, only GPIO\n");
161 break;
162 case TPS6105X_MODE_TORCH:
163 ret = tps6105x_add_device(tps6105x, &tps6105x_leds_cell);
164 break;
165 case TPS6105X_MODE_TORCH_FLASH:
166 ret = tps6105x_add_device(tps6105x, &tps6105x_flash_cell);
167 break;
168 case TPS6105X_MODE_VOLTAGE:
169 ret = tps6105x_add_device(tps6105x, &tps6105x_regulator_cell);
170 break;
171 default:
172 dev_warn(&client->dev, "invalid mode: %d\n", pdata->mode);
173 break;
174 }
175
176 if (ret)
177 mfd_remove_devices(&client->dev);
178
179 return ret;
180}
181
182static int tps6105x_remove(struct i2c_client *client)
183{
184 struct tps6105x *tps6105x = i2c_get_clientdata(client);
185
186 mfd_remove_devices(&client->dev);
187
188 /* Put chip in shutdown mode */
189 regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0,
190 TPS6105X_REG0_MODE_MASK,
191 TPS6105X_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT);
192
193 return 0;
194}
195
196static const struct i2c_device_id tps6105x_id[] = {
197 { "tps61050", 0 },
198 { "tps61052", 0 },
199 { }
200};
201MODULE_DEVICE_TABLE(i2c, tps6105x_id);
202
203static const struct of_device_id tps6105x_of_match[] = {
204 { .compatible = "ti,tps61050" },
205 { .compatible = "ti,tps61052" },
206 { },
207};
208MODULE_DEVICE_TABLE(of, tps6105x_of_match);
209
210static struct i2c_driver tps6105x_driver = {
211 .driver = {
212 .name = "tps6105x",
213 .of_match_table = tps6105x_of_match,
214 },
215 .probe = tps6105x_probe,
216 .remove = tps6105x_remove,
217 .id_table = tps6105x_id,
218};
219
220static int __init tps6105x_init(void)
221{
222 return i2c_add_driver(&tps6105x_driver);
223}
224subsys_initcall(tps6105x_init);
225
226static void __exit tps6105x_exit(void)
227{
228 i2c_del_driver(&tps6105x_driver);
229}
230module_exit(tps6105x_exit);
231
232MODULE_AUTHOR("Linus Walleij");
233MODULE_DESCRIPTION("TPS6105x White LED Boost Converter Driver");
234MODULE_LICENSE("GPL v2");