4 * TPS65217 chip family multi-function driver
6 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation version 2.
12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
13 * kind, whether express or implied; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
18 #include <linux/kernel.h>
19 #include <linux/device.h>
20 #include <linux/module.h>
21 #include <linux/platform_device.h>
22 #include <linux/init.h>
23 #include <linux/i2c.h>
24 #include <linux/slab.h>
25 #include <linux/regmap.h>
26 #include <linux/err.h>
28 #include <linux/of_device.h>
30 #include <linux/mfd/core.h>
31 #include <linux/mfd/tps65217.h>
33 static struct mfd_cell tps65217s[] = {
35 .name = "tps65217-pmic",
40 * tps65217_reg_read: Read a single tps65217 register.
42 * @tps: Device to read from.
43 * @reg: Register to read.
44 * @val: Contians the value
46 int tps65217_reg_read(struct tps65217 *tps, unsigned int reg,
49 return regmap_read(tps->regmap, reg, val);
51 EXPORT_SYMBOL_GPL(tps65217_reg_read);
54 * tps65217_reg_write: Write a single tps65217 register.
56 * @tps65217: Device to write to.
57 * @reg: Register to write to.
58 * @val: Value to write.
59 * @level: Password protected level
61 int tps65217_reg_write(struct tps65217 *tps, unsigned int reg,
62 unsigned int val, unsigned int level)
65 unsigned int xor_reg_val;
68 case TPS65217_PROTECT_NONE:
69 return regmap_write(tps->regmap, reg, val);
70 case TPS65217_PROTECT_L1:
71 xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
72 ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
77 return regmap_write(tps->regmap, reg, val);
78 case TPS65217_PROTECT_L2:
79 xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
80 ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
84 ret = regmap_write(tps->regmap, reg, val);
87 ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
91 return regmap_write(tps->regmap, reg, val);
96 EXPORT_SYMBOL_GPL(tps65217_reg_write);
99 * tps65217_update_bits: Modify bits w.r.t mask, val and level.
101 * @tps65217: Device to write to.
102 * @reg: Register to read-write to.
104 * @val: Value to write.
105 * @level: Password protected level
107 static int tps65217_update_bits(struct tps65217 *tps, unsigned int reg,
108 unsigned int mask, unsigned int val, unsigned int level)
113 ret = tps65217_reg_read(tps, reg, &data);
115 dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
122 ret = tps65217_reg_write(tps, reg, data, level);
124 dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
129 int tps65217_set_bits(struct tps65217 *tps, unsigned int reg,
130 unsigned int mask, unsigned int val, unsigned int level)
132 return tps65217_update_bits(tps, reg, mask, val, level);
134 EXPORT_SYMBOL_GPL(tps65217_set_bits);
136 int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg,
137 unsigned int mask, unsigned int level)
139 return tps65217_update_bits(tps, reg, mask, 0, level);
141 EXPORT_SYMBOL_GPL(tps65217_clear_bits);
143 static struct regmap_config tps65217_regmap_config = {
148 static const struct of_device_id tps65217_of_match[] = {
149 { .compatible = "ti,tps65217", .data = (void *)TPS65217 },
153 static int __devinit tps65217_probe(struct i2c_client *client,
154 const struct i2c_device_id *ids)
156 struct tps65217 *tps;
157 unsigned int version;
158 unsigned int chip_id = ids->driver_data;
159 const struct of_device_id *match;
162 if (client->dev.of_node) {
163 match = of_match_device(tps65217_of_match, &client->dev);
165 dev_err(&client->dev,
166 "Failed to find matching dt id\n");
169 chip_id = (unsigned int)match->data;
173 dev_err(&client->dev, "id is null.\n");
177 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
181 i2c_set_clientdata(client, tps);
182 tps->dev = &client->dev;
185 tps->regmap = devm_regmap_init_i2c(client, &tps65217_regmap_config);
186 if (IS_ERR(tps->regmap)) {
187 ret = PTR_ERR(tps->regmap);
188 dev_err(tps->dev, "Failed to allocate register map: %d\n",
193 ret = mfd_add_devices(tps->dev, -1, tps65217s,
194 ARRAY_SIZE(tps65217s), NULL, 0, NULL);
196 dev_err(tps->dev, "mfd_add_devices failed: %d\n", ret);
200 ret = tps65217_reg_read(tps, TPS65217_REG_CHIPID, &version);
202 dev_err(tps->dev, "Failed to read revision register: %d\n",
207 dev_info(tps->dev, "TPS65217 ID %#x version 1.%d\n",
208 (version & TPS65217_CHIPID_CHIP_MASK) >> 4,
209 version & TPS65217_CHIPID_REV_MASK);
214 static int __devexit tps65217_remove(struct i2c_client *client)
216 struct tps65217 *tps = i2c_get_clientdata(client);
218 mfd_remove_devices(tps->dev);
223 static const struct i2c_device_id tps65217_id_table[] = {
224 {"tps65217", TPS65217},
227 MODULE_DEVICE_TABLE(i2c, tps65217_id_table);
229 static struct i2c_driver tps65217_driver = {
232 .owner = THIS_MODULE,
233 .of_match_table = of_match_ptr(tps65217_of_match),
235 .id_table = tps65217_id_table,
236 .probe = tps65217_probe,
237 .remove = __devexit_p(tps65217_remove),
240 static int __init tps65217_init(void)
242 return i2c_add_driver(&tps65217_driver);
244 subsys_initcall(tps65217_init);
246 static void __exit tps65217_exit(void)
248 i2c_del_driver(&tps65217_driver);
250 module_exit(tps65217_exit);
252 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
253 MODULE_DESCRIPTION("TPS65217 chip family multi-function driver");
254 MODULE_LICENSE("GPL v2");