1/*
2 * tps65912-core.c  --  TI TPS65912x
3 *
4 * Copyright 2011 Texas Instruments Inc.
5 *
6 * Author: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
7 *
8 *  This program is free software; you can redistribute it and/or modify it
9 *  under  the terms of the GNU General  Public License as published by the
10 *  Free Software Foundation;  either version 2 of the License, or (at your
11 *  option) any later version.
12 *
13 *  This driver is based on wm8350 implementation.
14 */
15
16#include <linux/module.h>
17#include <linux/moduleparam.h>
18#include <linux/slab.h>
19#include <linux/gpio.h>
20#include <linux/mfd/core.h>
21#include <linux/mfd/tps65912.h>
22
23static const struct mfd_cell tps65912s[] = {
24	{
25		.name = "tps65912-pmic",
26	},
27};
28
29int tps65912_set_bits(struct tps65912 *tps65912, u8 reg, u8 mask)
30{
31	u8 data;
32	int err;
33
34	mutex_lock(&tps65912->io_mutex);
35
36	err = tps65912->read(tps65912, reg, 1, &data);
37	if (err) {
38		dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
39		goto out;
40	}
41
42	data |= mask;
43	err = tps65912->write(tps65912, reg, 1, &data);
44	if (err)
45		dev_err(tps65912->dev, "Write to reg 0x%x failed\n", reg);
46
47out:
48	mutex_unlock(&tps65912->io_mutex);
49	return err;
50}
51EXPORT_SYMBOL_GPL(tps65912_set_bits);
52
53int tps65912_clear_bits(struct tps65912 *tps65912, u8 reg, u8 mask)
54{
55	u8 data;
56	int err;
57
58	mutex_lock(&tps65912->io_mutex);
59	err = tps65912->read(tps65912, reg, 1, &data);
60	if (err) {
61		dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
62		goto out;
63	}
64
65	data &= ~mask;
66	err = tps65912->write(tps65912, reg, 1, &data);
67	if (err)
68		dev_err(tps65912->dev, "Write to reg 0x%x failed\n", reg);
69
70out:
71	mutex_unlock(&tps65912->io_mutex);
72	return err;
73}
74EXPORT_SYMBOL_GPL(tps65912_clear_bits);
75
76static inline int tps65912_read(struct tps65912 *tps65912, u8 reg)
77{
78	u8 val;
79	int err;
80
81	err = tps65912->read(tps65912, reg, 1, &val);
82	if (err < 0)
83		return err;
84
85	return val;
86}
87
88static inline int tps65912_write(struct tps65912 *tps65912, u8 reg, u8 val)
89{
90	return tps65912->write(tps65912, reg, 1, &val);
91}
92
93int tps65912_reg_read(struct tps65912 *tps65912, u8 reg)
94{
95	int data;
96
97	mutex_lock(&tps65912->io_mutex);
98
99	data = tps65912_read(tps65912, reg);
100	if (data < 0)
101		dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
102
103	mutex_unlock(&tps65912->io_mutex);
104	return data;
105}
106EXPORT_SYMBOL_GPL(tps65912_reg_read);
107
108int tps65912_reg_write(struct tps65912 *tps65912, u8 reg, u8 val)
109{
110	int err;
111
112	mutex_lock(&tps65912->io_mutex);
113
114	err = tps65912_write(tps65912, reg, val);
115	if (err < 0)
116		dev_err(tps65912->dev, "Write for reg 0x%x failed\n", reg);
117
118	mutex_unlock(&tps65912->io_mutex);
119	return err;
120}
121EXPORT_SYMBOL_GPL(tps65912_reg_write);
122
123int tps65912_device_init(struct tps65912 *tps65912)
124{
125	struct tps65912_board *pmic_plat_data = dev_get_platdata(tps65912->dev);
126	struct tps65912_platform_data *init_data;
127	int ret, dcdc_avs, value;
128
129	init_data = kzalloc(sizeof(struct tps65912_platform_data), GFP_KERNEL);
130	if (init_data == NULL)
131		return -ENOMEM;
132
133	mutex_init(&tps65912->io_mutex);
134	dev_set_drvdata(tps65912->dev, tps65912);
135
136	dcdc_avs = (pmic_plat_data->is_dcdc1_avs << 0 |
137			pmic_plat_data->is_dcdc2_avs  << 1 |
138				pmic_plat_data->is_dcdc3_avs << 2 |
139					pmic_plat_data->is_dcdc4_avs << 3);
140	if (dcdc_avs) {
141		tps65912->read(tps65912, TPS65912_I2C_SPI_CFG, 1, &value);
142		dcdc_avs |= value;
143		tps65912->write(tps65912, TPS65912_I2C_SPI_CFG, 1, &dcdc_avs);
144	}
145
146	ret = mfd_add_devices(tps65912->dev, -1,
147			      tps65912s, ARRAY_SIZE(tps65912s),
148			      NULL, 0, NULL);
149	if (ret < 0)
150		goto err;
151
152	init_data->irq = pmic_plat_data->irq;
153	init_data->irq_base = pmic_plat_data->irq_base;
154	ret = tps65912_irq_init(tps65912, init_data->irq, init_data);
155	if (ret < 0)
156		goto err;
157
158	kfree(init_data);
159	return ret;
160
161err:
162	kfree(init_data);
163	mfd_remove_devices(tps65912->dev);
164	return ret;
165}
166
167void tps65912_device_exit(struct tps65912 *tps65912)
168{
169	mfd_remove_devices(tps65912->dev);
170	tps65912_irq_exit(tps65912);
171}
172
173MODULE_AUTHOR("Margarita Olaya	<magi@slimlogic.co.uk>");
174MODULE_DESCRIPTION("TPS65912x chip family multi-function driver");
175MODULE_LICENSE("GPL");
176