1/*
2 * tps65910.c  --  TI TPS6591x
3 *
4 * Copyright 2010 Texas Instruments Inc.
5 *
6 * Author: Graeme Gregory <gg@slimlogic.co.uk>
7 * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
8 *
9 *  This program is free software; you can redistribute it and/or modify it
10 *  under  the terms of the GNU General  Public License as published by the
11 *  Free Software Foundation;  either version 2 of the License, or (at your
12 *  option) any later version.
13 *
14 */
15
16#include <linux/module.h>
17#include <linux/moduleparam.h>
18#include <linux/init.h>
19#include <linux/err.h>
20#include <linux/slab.h>
21#include <linux/i2c.h>
22#include <linux/gpio.h>
23#include <linux/mfd/core.h>
24#include <linux/regmap.h>
25#include <linux/mfd/tps65910.h>
26
27static struct mfd_cell tps65910s[] = {
28	{
29		.name = "tps65910-pmic",
30	},
31	{
32		.name = "tps65910-rtc",
33	},
34	{
35		.name = "tps65910-power",
36	},
37};
38
39
40static int tps65910_i2c_read(struct tps65910 *tps65910, u8 reg,
41				  int bytes, void *dest)
42{
43	return regmap_bulk_read(tps65910->regmap, reg, dest, bytes);
44}
45
46static int tps65910_i2c_write(struct tps65910 *tps65910, u8 reg,
47				  int bytes, void *src)
48{
49	return regmap_bulk_write(tps65910->regmap, reg, src, bytes);
50}
51
52int tps65910_set_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
53{
54	return regmap_update_bits(tps65910->regmap, reg, mask, mask);
55}
56EXPORT_SYMBOL_GPL(tps65910_set_bits);
57
58int tps65910_clear_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
59{
60	return regmap_update_bits(tps65910->regmap, reg, mask, 0);
61}
62EXPORT_SYMBOL_GPL(tps65910_clear_bits);
63
64static bool is_volatile_reg(struct device *dev, unsigned int reg)
65{
66	struct tps65910 *tps65910 = dev_get_drvdata(dev);
67
68	/*
69	 * Caching all regulator registers.
70	 * All regualator register address range is same for
71	 * TPS65910 and TPS65911
72	 */
73	if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
74		/* Check for non-existing register */
75		if (tps65910_chip_id(tps65910) == TPS65910)
76			if ((reg == TPS65911_VDDCTRL_OP) ||
77				(reg == TPS65911_VDDCTRL_SR))
78				return true;
79		return false;
80	}
81	return true;
82}
83
84static const struct regmap_config tps65910_regmap_config = {
85	.reg_bits = 8,
86	.val_bits = 8,
87	.volatile_reg = is_volatile_reg,
88	.max_register = TPS65910_MAX_REGISTER,
89	.num_reg_defaults_raw = TPS65910_MAX_REGISTER,
90	.cache_type = REGCACHE_RBTREE,
91};
92
93static int tps65910_i2c_probe(struct i2c_client *i2c,
94			    const struct i2c_device_id *id)
95{
96	struct tps65910 *tps65910;
97	struct tps65910_board *pmic_plat_data;
98	struct tps65910_platform_data *init_data;
99	int ret = 0;
100
101	pmic_plat_data = dev_get_platdata(&i2c->dev);
102	if (!pmic_plat_data)
103		return -EINVAL;
104
105	init_data = kzalloc(sizeof(struct tps65910_platform_data), GFP_KERNEL);
106	if (init_data == NULL)
107		return -ENOMEM;
108
109	tps65910 = kzalloc(sizeof(struct tps65910), GFP_KERNEL);
110	if (tps65910 == NULL) {
111		kfree(init_data);
112		return -ENOMEM;
113	}
114
115	i2c_set_clientdata(i2c, tps65910);
116	tps65910->dev = &i2c->dev;
117	tps65910->i2c_client = i2c;
118	tps65910->id = id->driver_data;
119	tps65910->read = tps65910_i2c_read;
120	tps65910->write = tps65910_i2c_write;
121	mutex_init(&tps65910->io_mutex);
122
123	tps65910->regmap = regmap_init_i2c(i2c, &tps65910_regmap_config);
124	if (IS_ERR(tps65910->regmap)) {
125		ret = PTR_ERR(tps65910->regmap);
126		dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
127		goto regmap_err;
128	}
129
130	ret = mfd_add_devices(tps65910->dev, -1,
131			      tps65910s, ARRAY_SIZE(tps65910s),
132			      NULL, 0);
133	if (ret < 0)
134		goto err;
135
136	init_data->irq = pmic_plat_data->irq;
137	init_data->irq_base = pmic_plat_data->irq_base;
138
139	tps65910_gpio_init(tps65910, pmic_plat_data->gpio_base);
140
141	tps65910_irq_init(tps65910, init_data->irq, init_data);
142
143	kfree(init_data);
144	return ret;
145
146err:
147	regmap_exit(tps65910->regmap);
148regmap_err:
149	kfree(tps65910);
150	kfree(init_data);
151	return ret;
152}
153
154static int tps65910_i2c_remove(struct i2c_client *i2c)
155{
156	struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
157
158	tps65910_irq_exit(tps65910);
159	mfd_remove_devices(tps65910->dev);
160	regmap_exit(tps65910->regmap);
161	kfree(tps65910);
162
163	return 0;
164}
165
166static const struct i2c_device_id tps65910_i2c_id[] = {
167       { "tps65910", TPS65910 },
168       { "tps65911", TPS65911 },
169       { }
170};
171MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
172
173
174static struct i2c_driver tps65910_i2c_driver = {
175	.driver = {
176		   .name = "tps65910",
177		   .owner = THIS_MODULE,
178	},
179	.probe = tps65910_i2c_probe,
180	.remove = tps65910_i2c_remove,
181	.id_table = tps65910_i2c_id,
182};
183
184static int __init tps65910_i2c_init(void)
185{
186	return i2c_add_driver(&tps65910_i2c_driver);
187}
188/* init early so consumer devices can complete system boot */
189subsys_initcall(tps65910_i2c_init);
190
191static void __exit tps65910_i2c_exit(void)
192{
193	i2c_del_driver(&tps65910_i2c_driver);
194}
195module_exit(tps65910_i2c_exit);
196
197MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
198MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
199MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
200MODULE_LICENSE("GPL");
201