aboutsummaryrefslogtreecommitdiff
path: root/drivers/mfd/tps65912-core.c
blob: 74fd8cb5f37224e576f58398c20fda9f4884d9e7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
/*
 * tps65912-core.c  --  TI TPS65912x
 *
 * Copyright 2011 Texas Instruments Inc.
 *
 * Author: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under  the terms of the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the License, or (at your
 *  option) any later version.
 *
 *  This driver is based on wm8350 implementation.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps65912.h>

static struct mfd_cell tps65912s[] = {
	{
		.name = "tps65912-pmic",
	},
};

int tps65912_set_bits(struct tps65912 *tps65912, u8 reg, u8 mask)
{
	u8 data;
	int err;

	mutex_lock(&tps65912->io_mutex);

	err = tps65912->read(tps65912, reg, 1, &data);
	if (err) {
		dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
		goto out;
	}

	data |= mask;
	err = tps65912->write(tps65912, reg, 1, &data);
	if (err)
		dev_err(tps65912->dev, "Write to reg 0x%x failed\n", reg);

out:
	mutex_unlock(&tps65912->io_mutex);
	return err;
}
EXPORT_SYMBOL_GPL(tps65912_set_bits);

int tps65912_clear_bits(struct tps65912 *tps65912, u8 reg, u8 mask)
{
	u8 data;
	int err;

	mutex_lock(&tps65912->io_mutex);
	err = tps65912->read(tps65912, reg, 1, &data);
	if (err) {
		dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
		goto out;
	}

	data &= ~mask;
	err = tps65912->write(tps65912, reg, 1, &data);
	if (err)
		dev_err(tps65912->dev, "Write to reg 0x%x failed\n", reg);

out:
	mutex_unlock(&tps65912->io_mutex);
	return err;
}
EXPORT_SYMBOL_GPL(tps65912_clear_bits);

static inline int tps65912_read(struct tps65912 *tps65912, u8 reg)
{
	u8 val;
	int err;

	err = tps65912->read(tps65912, reg, 1, &val);
	if (err < 0)
		return err;

	return val;
}

static inline int tps65912_write(struct tps65912 *tps65912, u8 reg, u8 val)
{
	return tps65912->write(tps65912, reg, 1, &val);
}

int tps65912_reg_read(struct tps65912 *tps65912, u8 reg)
{
	int data;

	mutex_lock(&tps65912->io_mutex);

	data = tps65912_read(tps65912, reg);
	if (data < 0)
		dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);

	mutex_unlock(&tps65912->io_mutex);
	return data;
}
EXPORT_SYMBOL_GPL(tps65912_reg_read);

int tps65912_reg_write(struct tps65912 *tps65912, u8 reg, u8 val)
{
	int err;

	mutex_lock(&tps65912->io_mutex);

	err = tps65912_write(tps65912, reg, val);
	if (err < 0)
		dev_err(tps65912->dev, "Write for reg 0x%x failed\n", reg);

	mutex_unlock(&tps65912->io_mutex);
	return err;
}
EXPORT_SYMBOL_GPL(tps65912_reg_write);

int tps65912_device_init(struct tps65912 *tps65912)
{
	struct tps65912_board *pmic_plat_data = tps65912->dev->platform_data;
	struct tps65912_platform_data *init_data;
	int ret, dcdc_avs, value;

	init_data = kzalloc(sizeof(struct tps65912_platform_data), GFP_KERNEL);
	if (init_data == NULL)
		return -ENOMEM;

	mutex_init(&tps65912->io_mutex);
	dev_set_drvdata(tps65912->dev, tps65912);

	dcdc_avs = (pmic_plat_data->is_dcdc1_avs << 0 |
			pmic_plat_data->is_dcdc2_avs  << 1 |
				pmic_plat_data->is_dcdc3_avs << 2 |
					pmic_plat_data->is_dcdc4_avs << 3);
	if (dcdc_avs) {
		tps65912->read(tps65912, TPS65912_I2C_SPI_CFG, 1, &value);
		dcdc_avs |= value;
		tps65912->write(tps65912, TPS65912_I2C_SPI_CFG, 1, &dcdc_avs);
	}

	ret = mfd_add_devices(tps65912->dev, -1,
			      tps65912s, ARRAY_SIZE(tps65912s),
			      NULL, 0);
	if (ret < 0)
		goto err;

	init_data->irq = pmic_plat_data->irq;
	init_data->irq_base = pmic_plat_data->irq_base;
	ret = tps65912_irq_init(tps65912, init_data->irq, init_data);
	if (ret < 0)
		goto err;

	kfree(init_data);
	return ret;

err:
	kfree(init_data);
	mfd_remove_devices(tps65912->dev);
	kfree(tps65912);
	return ret;
}

void tps65912_device_exit(struct tps65912 *tps65912)
{
	mfd_remove_devices(tps65912->dev);
	kfree(tps65912);
}

MODULE_AUTHOR("Margarita Olaya	<magi@slimlogic.co.uk>");
MODULE_DESCRIPTION("TPS65912x chip family multi-function driver");
MODULE_LICENSE("GPL");