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/init.h>
19 #include <linux/slab.h>
20 #include <linux/gpio.h>
21 #include <linux/mfd/core.h>
22 #include <linux/mfd/tps65912.h>
23
24 static struct mfd_cell tps65912s[] = {
25 {
26 .name = "tps65912-pmic",
27 },
28 };
29
tps65912_set_bits(struct tps65912 * tps65912,u8 reg,u8 mask)30 int tps65912_set_bits(struct tps65912 *tps65912, u8 reg, u8 mask)
31 {
32 u8 data;
33 int err;
34
35 mutex_lock(&tps65912->io_mutex);
36
37 err = tps65912->read(tps65912, reg, 1, &data);
38 if (err) {
39 dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
40 goto out;
41 }
42
43 data |= mask;
44 err = tps65912->write(tps65912, reg, 1, &data);
45 if (err)
46 dev_err(tps65912->dev, "Write to reg 0x%x failed\n", reg);
47
48 out:
49 mutex_unlock(&tps65912->io_mutex);
50 return err;
51 }
52 EXPORT_SYMBOL_GPL(tps65912_set_bits);
53
tps65912_clear_bits(struct tps65912 * tps65912,u8 reg,u8 mask)54 int tps65912_clear_bits(struct tps65912 *tps65912, u8 reg, u8 mask)
55 {
56 u8 data;
57 int err;
58
59 mutex_lock(&tps65912->io_mutex);
60 err = tps65912->read(tps65912, reg, 1, &data);
61 if (err) {
62 dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
63 goto out;
64 }
65
66 data &= ~mask;
67 err = tps65912->write(tps65912, reg, 1, &data);
68 if (err)
69 dev_err(tps65912->dev, "Write to reg 0x%x failed\n", reg);
70
71 out:
72 mutex_unlock(&tps65912->io_mutex);
73 return err;
74 }
75 EXPORT_SYMBOL_GPL(tps65912_clear_bits);
76
tps65912_read(struct tps65912 * tps65912,u8 reg)77 static inline int tps65912_read(struct tps65912 *tps65912, u8 reg)
78 {
79 u8 val;
80 int err;
81
82 err = tps65912->read(tps65912, reg, 1, &val);
83 if (err < 0)
84 return err;
85
86 return val;
87 }
88
tps65912_write(struct tps65912 * tps65912,u8 reg,u8 val)89 static inline int tps65912_write(struct tps65912 *tps65912, u8 reg, u8 val)
90 {
91 return tps65912->write(tps65912, reg, 1, &val);
92 }
93
tps65912_reg_read(struct tps65912 * tps65912,u8 reg)94 int tps65912_reg_read(struct tps65912 *tps65912, u8 reg)
95 {
96 int data;
97
98 mutex_lock(&tps65912->io_mutex);
99
100 data = tps65912_read(tps65912, reg);
101 if (data < 0)
102 dev_err(tps65912->dev, "Read from reg 0x%x failed\n", reg);
103
104 mutex_unlock(&tps65912->io_mutex);
105 return data;
106 }
107 EXPORT_SYMBOL_GPL(tps65912_reg_read);
108
tps65912_reg_write(struct tps65912 * tps65912,u8 reg,u8 val)109 int tps65912_reg_write(struct tps65912 *tps65912, u8 reg, u8 val)
110 {
111 int err;
112
113 mutex_lock(&tps65912->io_mutex);
114
115 err = tps65912_write(tps65912, reg, val);
116 if (err < 0)
117 dev_err(tps65912->dev, "Write for reg 0x%x failed\n", reg);
118
119 mutex_unlock(&tps65912->io_mutex);
120 return err;
121 }
122 EXPORT_SYMBOL_GPL(tps65912_reg_write);
123
tps65912_device_init(struct tps65912 * tps65912)124 int tps65912_device_init(struct tps65912 *tps65912)
125 {
126 struct tps65912_board *pmic_plat_data = tps65912->dev->platform_data;
127 struct tps65912_platform_data *init_data;
128 int ret, dcdc_avs, value;
129
130 init_data = kzalloc(sizeof(struct tps65912_platform_data), GFP_KERNEL);
131 if (init_data == NULL)
132 return -ENOMEM;
133
134 mutex_init(&tps65912->io_mutex);
135 dev_set_drvdata(tps65912->dev, tps65912);
136
137 dcdc_avs = (pmic_plat_data->is_dcdc1_avs << 0 |
138 pmic_plat_data->is_dcdc2_avs << 1 |
139 pmic_plat_data->is_dcdc3_avs << 2 |
140 pmic_plat_data->is_dcdc4_avs << 3);
141 if (dcdc_avs) {
142 tps65912->read(tps65912, TPS65912_I2C_SPI_CFG, 1, &value);
143 dcdc_avs |= value;
144 tps65912->write(tps65912, TPS65912_I2C_SPI_CFG, 1, &dcdc_avs);
145 }
146
147 ret = mfd_add_devices(tps65912->dev, -1,
148 tps65912s, ARRAY_SIZE(tps65912s),
149 NULL, 0);
150 if (ret < 0)
151 goto err;
152
153 init_data->irq = pmic_plat_data->irq;
154 init_data->irq_base = pmic_plat_data->irq_base;
155 ret = tps65912_irq_init(tps65912, init_data->irq, init_data);
156 if (ret < 0)
157 goto err;
158
159 kfree(init_data);
160 return ret;
161
162 err:
163 kfree(init_data);
164 mfd_remove_devices(tps65912->dev);
165 kfree(tps65912);
166 return ret;
167 }
168
tps65912_device_exit(struct tps65912 * tps65912)169 void tps65912_device_exit(struct tps65912 *tps65912)
170 {
171 mfd_remove_devices(tps65912->dev);
172 kfree(tps65912);
173 }
174
175 MODULE_AUTHOR("Margarita Olaya <magi@slimlogic.co.uk>");
176 MODULE_DESCRIPTION("TPS65912x chip family multi-function driver");
177 MODULE_LICENSE("GPL");
178