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/mfd/core.h>
29 #include <linux/mfd/tps65217.h>
32 * tps65217_reg_read: Read a single tps65217 register.
34 * @tps: Device to read from.
35 * @reg: Register to read.
36 * @val: Contians the value
38 int tps65217_reg_read(struct tps65217 *tps, unsigned int reg,
41 return regmap_read(tps->regmap, reg, val);
43 EXPORT_SYMBOL_GPL(tps65217_reg_read);
46 * tps65217_reg_write: Write a single tps65217 register.
48 * @tps65217: Device to write to.
49 * @reg: Register to write to.
50 * @val: Value to write.
51 * @level: Password protected level
53 int tps65217_reg_write(struct tps65217 *tps, unsigned int reg,
54 unsigned int val, unsigned int level)
57 unsigned int xor_reg_val;
60 case TPS65217_PROTECT_NONE:
61 return regmap_write(tps->regmap, reg, val);
62 case TPS65217_PROTECT_L1:
63 xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
64 ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
69 return regmap_write(tps->regmap, reg, val);
70 case TPS65217_PROTECT_L2:
71 xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
72 ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
76 ret = regmap_write(tps->regmap, reg, val);
79 ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
83 return regmap_write(tps->regmap, reg, val);
88 EXPORT_SYMBOL_GPL(tps65217_reg_write);
91 * tps65217_update_bits: Modify bits w.r.t mask, val and level.
93 * @tps65217: Device to write to.
94 * @reg: Register to read-write to.
96 * @val: Value to write.
97 * @level: Password protected level
99 int tps65217_update_bits(struct tps65217 *tps, unsigned int reg,
100 unsigned int mask, unsigned int val, unsigned int level)
105 ret = tps65217_reg_read(tps, reg, &data);
107 dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
114 ret = tps65217_reg_write(tps, reg, data, level);
116 dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
121 int tps65217_set_bits(struct tps65217 *tps, unsigned int reg,
122 unsigned int mask, unsigned int val, unsigned int level)
124 return tps65217_update_bits(tps, reg, mask, val, level);
126 EXPORT_SYMBOL_GPL(tps65217_set_bits);
128 int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg,
129 unsigned int mask, unsigned int level)
131 return tps65217_update_bits(tps, reg, mask, 0, level);
133 EXPORT_SYMBOL_GPL(tps65217_clear_bits);
135 static struct regmap_config tps65217_regmap_config = {
140 static int __devinit tps65217_probe(struct i2c_client *client,
141 const struct i2c_device_id *ids)
143 struct tps65217 *tps;
144 struct tps65217_board *pdata = client->dev.platform_data;
146 unsigned int version;
148 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
153 tps->regmap = regmap_init_i2c(client, &tps65217_regmap_config);
154 if (IS_ERR(tps->regmap)) {
155 ret = PTR_ERR(tps->regmap);
156 dev_err(tps->dev, "Failed to allocate register map: %d\n",
161 i2c_set_clientdata(client, tps);
162 tps->dev = &client->dev;
164 ret = tps65217_reg_read(tps, TPS65217_REG_CHIPID, &version);
166 dev_err(tps->dev, "Failed to read revision"
167 " register: %d\n", ret);
171 dev_info(tps->dev, "TPS65217 ID %#x version 1.%d\n",
172 (version & TPS65217_CHIPID_CHIP_MASK) >> 4,
173 version & TPS65217_CHIPID_REV_MASK);
175 for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
176 struct platform_device *pdev;
178 pdev = platform_device_alloc("tps65217-pmic", i);
180 dev_err(tps->dev, "Cannot create regulator %d\n", i);
184 pdev->dev.parent = tps->dev;
185 platform_device_add_data(pdev, &pdata->tps65217_init_data[i],
186 sizeof(pdata->tps65217_init_data[i]));
187 tps->regulator_pdev[i] = pdev;
189 platform_device_add(pdev);
195 regmap_exit(tps->regmap);
200 static int __devexit tps65217_remove(struct i2c_client *client)
202 struct tps65217 *tps = i2c_get_clientdata(client);
205 for (i = 0; i < TPS65217_NUM_REGULATOR; i++)
206 platform_device_unregister(tps->regulator_pdev[i]);
208 regmap_exit(tps->regmap);
213 static const struct i2c_device_id tps65217_id_table[] = {
217 MODULE_DEVICE_TABLE(i2c, tps65217_id_table);
219 static struct i2c_driver tps65217_driver = {
223 .id_table = tps65217_id_table,
224 .probe = tps65217_probe,
225 .remove = __devexit_p(tps65217_remove),
228 static int __init tps65217_init(void)
230 return i2c_add_driver(&tps65217_driver);
232 subsys_initcall(tps65217_init);
234 static void __exit tps65217_exit(void)
236 i2c_del_driver(&tps65217_driver);
238 module_exit(tps65217_exit);
240 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
241 MODULE_DESCRIPTION("TPS65217 chip family multi-function driver");
242 MODULE_LICENSE("GPL v2");