2 * I2C access for DA9052 PMICs.
4 * Copyright(c) 2011 Dialog Semiconductor Ltd.
6 * Author: David Dajun Chen <dchen@diasemi.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
15 #include <linux/device.h>
16 #include <linux/module.h>
17 #include <linux/input.h>
18 #include <linux/mfd/core.h>
19 #include <linux/i2c.h>
20 #include <linux/err.h>
22 #include <linux/mfd/da9052/da9052.h>
23 #include <linux/mfd/da9052/reg.h>
27 #include <linux/of_device.h>
30 static int da9052_i2c_enable_multiwrite(struct da9052 *da9052)
34 ret = regmap_read(da9052->regmap, DA9052_CONTROL_B_REG, ®_val);
38 if (reg_val & DA9052_CONTROL_B_WRITEMODE) {
39 reg_val &= ~DA9052_CONTROL_B_WRITEMODE;
40 ret = regmap_write(da9052->regmap, DA9052_CONTROL_B_REG,
49 static struct i2c_device_id da9052_i2c_id[] = {
51 {"da9053-aa", DA9053_AA},
52 {"da9053-ba", DA9053_BA},
53 {"da9053-bb", DA9053_BB},
58 static const struct of_device_id dialog_dt_ids[] = {
59 { .compatible = "dlg,da9052", .data = &da9052_i2c_id[0] },
60 { .compatible = "dlg,da9053-aa", .data = &da9052_i2c_id[1] },
61 { .compatible = "dlg,da9053-ab", .data = &da9052_i2c_id[2] },
62 { .compatible = "dlg,da9053-bb", .data = &da9052_i2c_id[3] },
67 static int __devinit da9052_i2c_probe(struct i2c_client *client,
68 const struct i2c_device_id *id)
70 struct da9052 *da9052;
73 da9052 = kzalloc(sizeof(struct da9052), GFP_KERNEL);
77 if (!i2c_check_functionality(client->adapter,
78 I2C_FUNC_SMBUS_BYTE_DATA)) {
79 dev_info(&client->dev, "Error in %s:i2c_check_functionality\n",
85 da9052->dev = &client->dev;
86 da9052->chip_irq = client->irq;
88 i2c_set_clientdata(client, da9052);
90 da9052->regmap = regmap_init_i2c(client, &da9052_regmap_config);
91 if (IS_ERR(da9052->regmap)) {
92 ret = PTR_ERR(da9052->regmap);
93 dev_err(&client->dev, "Failed to allocate register map: %d\n",
98 ret = da9052_i2c_enable_multiwrite(da9052);
104 struct device_node *np = client->dev.of_node;
105 const struct of_device_id *deviceid;
107 deviceid = of_match_node(np, dialog_dt_ids);
108 id = (const struct i2c_device_id *)deviceid->data;
114 dev_err(&client->dev, "id is null.\n");
118 ret = da9052_device_init(da9052, id->driver_data);
125 regmap_exit(da9052->regmap);
131 static int __devexit da9052_i2c_remove(struct i2c_client *client)
133 struct da9052 *da9052 = i2c_get_clientdata(client);
135 da9052_device_exit(da9052);
136 regmap_exit(da9052->regmap);
142 static struct i2c_driver da9052_i2c_driver = {
143 .probe = da9052_i2c_probe,
144 .remove = __devexit_p(da9052_i2c_remove),
145 .id_table = da9052_i2c_id,
148 .owner = THIS_MODULE,
150 .of_match_table = dialog_dt_ids,
155 static int __init da9052_i2c_init(void)
159 ret = i2c_add_driver(&da9052_i2c_driver);
161 pr_err("DA9052 I2C registration failed %d\n", ret);
167 subsys_initcall(da9052_i2c_init);
169 static void __exit da9052_i2c_exit(void)
171 i2c_del_driver(&da9052_i2c_driver);
173 module_exit(da9052_i2c_exit);
175 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
176 MODULE_DESCRIPTION("I2C driver for Dialog DA9052 PMIC");
177 MODULE_LICENSE("GPL");