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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 
27 static 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 
tps65910_i2c_read(struct tps65910 * tps65910,u8 reg,int bytes,void * dest)40 static 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 
tps65910_i2c_write(struct tps65910 * tps65910,u8 reg,int bytes,void * src)46 static 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 
tps65910_set_bits(struct tps65910 * tps65910,u8 reg,u8 mask)52 int tps65910_set_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
53 {
54 	return regmap_update_bits(tps65910->regmap, reg, mask, mask);
55 }
56 EXPORT_SYMBOL_GPL(tps65910_set_bits);
57 
tps65910_clear_bits(struct tps65910 * tps65910,u8 reg,u8 mask)58 int tps65910_clear_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
59 {
60 	return regmap_update_bits(tps65910->regmap, reg, mask, 0);
61 }
62 EXPORT_SYMBOL_GPL(tps65910_clear_bits);
63 
is_volatile_reg(struct device * dev,unsigned int reg)64 static 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 
84 static 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 
tps65910_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)93 static 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 
146 err:
147 	regmap_exit(tps65910->regmap);
148 regmap_err:
149 	kfree(tps65910);
150 	kfree(init_data);
151 	return ret;
152 }
153 
tps65910_i2c_remove(struct i2c_client * i2c)154 static 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 
166 static const struct i2c_device_id tps65910_i2c_id[] = {
167        { "tps65910", TPS65910 },
168        { "tps65911", TPS65911 },
169        { }
170 };
171 MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
172 
173 
174 static 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 
tps65910_i2c_init(void)184 static 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 */
189 subsys_initcall(tps65910_i2c_init);
190 
tps65910_i2c_exit(void)191 static void __exit tps65910_i2c_exit(void)
192 {
193 	i2c_del_driver(&tps65910_i2c_driver);
194 }
195 module_exit(tps65910_i2c_exit);
196 
197 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
198 MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
199 MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
200 MODULE_LICENSE("GPL");
201