summaryrefslogtreecommitdiff
path: root/drivers/mfd/lp8788.c
blob: c223d2c6a363593df39c77ea7d84a95d7794f84d (plain) (blame)
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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
// SPDX-License-Identifier: GPL-2.0-only
/*
 * TI LP8788 MFD - core interface
 *
 * Copyright 2012 Texas Instruments
 *
 * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
 */

#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/lp8788.h>
#include <linux/module.h>
#include <linux/slab.h>

#define MAX_LP8788_REGISTERS		0xA2

#define MFD_DEV_SIMPLE(_name)					\
{								\
	.name = LP8788_DEV_##_name,				\
}

#define MFD_DEV_WITH_ID(_name, _id)				\
{								\
	.name = LP8788_DEV_##_name,				\
	.id = _id,						\
}

#define MFD_DEV_WITH_RESOURCE(_name, _resource, num_resource)	\
{								\
	.name = LP8788_DEV_##_name,				\
	.resources = _resource,					\
	.num_resources = num_resource,				\
}

static const struct resource chg_irqs[] = {
	/* Charger Interrupts */
	{
		.start = LP8788_INT_CHG_INPUT_STATE,
		.end   = LP8788_INT_PRECHG_TIMEOUT,
		.name  = LP8788_CHG_IRQ,
		.flags = IORESOURCE_IRQ,
	},
	/* Power Routing Switch Interrupts */
	{
		.start = LP8788_INT_ENTER_SYS_SUPPORT,
		.end   = LP8788_INT_EXIT_SYS_SUPPORT,
		.name  = LP8788_PRSW_IRQ,
		.flags = IORESOURCE_IRQ,
	},
	/* Battery Interrupts */
	{
		.start = LP8788_INT_BATT_LOW,
		.end   = LP8788_INT_NO_BATT,
		.name  = LP8788_BATT_IRQ,
		.flags = IORESOURCE_IRQ,
	},
};

static const struct resource rtc_irqs[] = {
	{
		.start = LP8788_INT_RTC_ALARM1,
		.end   = LP8788_INT_RTC_ALARM2,
		.name  = LP8788_ALM_IRQ,
		.flags = IORESOURCE_IRQ,
	},
};

static const struct mfd_cell lp8788_devs[] = {
	/* 4 bucks */
	MFD_DEV_WITH_ID(BUCK, 1),
	MFD_DEV_WITH_ID(BUCK, 2),
	MFD_DEV_WITH_ID(BUCK, 3),
	MFD_DEV_WITH_ID(BUCK, 4),

	/* 12 digital ldos */
	MFD_DEV_WITH_ID(DLDO, 1),
	MFD_DEV_WITH_ID(DLDO, 2),
	MFD_DEV_WITH_ID(DLDO, 3),
	MFD_DEV_WITH_ID(DLDO, 4),
	MFD_DEV_WITH_ID(DLDO, 5),
	MFD_DEV_WITH_ID(DLDO, 6),
	MFD_DEV_WITH_ID(DLDO, 7),
	MFD_DEV_WITH_ID(DLDO, 8),
	MFD_DEV_WITH_ID(DLDO, 9),
	MFD_DEV_WITH_ID(DLDO, 10),
	MFD_DEV_WITH_ID(DLDO, 11),
	MFD_DEV_WITH_ID(DLDO, 12),

	/* 10 analog ldos */
	MFD_DEV_WITH_ID(ALDO, 1),
	MFD_DEV_WITH_ID(ALDO, 2),
	MFD_DEV_WITH_ID(ALDO, 3),
	MFD_DEV_WITH_ID(ALDO, 4),
	MFD_DEV_WITH_ID(ALDO, 5),
	MFD_DEV_WITH_ID(ALDO, 6),
	MFD_DEV_WITH_ID(ALDO, 7),
	MFD_DEV_WITH_ID(ALDO, 8),
	MFD_DEV_WITH_ID(ALDO, 9),
	MFD_DEV_WITH_ID(ALDO, 10),

	/* ADC */
	MFD_DEV_SIMPLE(ADC),

	/* battery charger */
	MFD_DEV_WITH_RESOURCE(CHARGER, chg_irqs, ARRAY_SIZE(chg_irqs)),

	/* rtc */
	MFD_DEV_WITH_RESOURCE(RTC, rtc_irqs, ARRAY_SIZE(rtc_irqs)),

	/* backlight */
	MFD_DEV_SIMPLE(BACKLIGHT),

	/* current sink for vibrator */
	MFD_DEV_SIMPLE(VIBRATOR),

	/* current sink for keypad LED */
	MFD_DEV_SIMPLE(KEYLED),
};

int lp8788_read_byte(struct lp8788 *lp, u8 reg, u8 *data)
{
	int ret;
	unsigned int val;

	ret = regmap_read(lp->regmap, reg, &val);
	if (ret < 0) {
		dev_err(lp->dev, "failed to read 0x%.2x\n", reg);
		return ret;
	}

	*data = (u8)val;
	return 0;
}
EXPORT_SYMBOL_GPL(lp8788_read_byte);

int lp8788_read_multi_bytes(struct lp8788 *lp, u8 reg, u8 *data, size_t count)
{
	return regmap_bulk_read(lp->regmap, reg, data, count);
}
EXPORT_SYMBOL_GPL(lp8788_read_multi_bytes);

int lp8788_write_byte(struct lp8788 *lp, u8 reg, u8 data)
{
	return regmap_write(lp->regmap, reg, data);
}
EXPORT_SYMBOL_GPL(lp8788_write_byte);

int lp8788_update_bits(struct lp8788 *lp, u8 reg, u8 mask, u8 data)
{
	return regmap_update_bits(lp->regmap, reg, mask, data);
}
EXPORT_SYMBOL_GPL(lp8788_update_bits);

static int lp8788_platform_init(struct lp8788 *lp)
{
	struct lp8788_platform_data *pdata = lp->pdata;

	return (pdata && pdata->init_func) ? pdata->init_func(lp) : 0;
}

static const struct regmap_config lp8788_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = MAX_LP8788_REGISTERS,
};

static int lp8788_probe(struct i2c_client *cl, const struct i2c_device_id *id)
{
	struct lp8788 *lp;
	struct lp8788_platform_data *pdata = dev_get_platdata(&cl->dev);
	int ret;

	lp = devm_kzalloc(&cl->dev, sizeof(struct lp8788), GFP_KERNEL);
	if (!lp)
		return -ENOMEM;

	lp->regmap = devm_regmap_init_i2c(cl, &lp8788_regmap_config);
	if (IS_ERR(lp->regmap)) {
		ret = PTR_ERR(lp->regmap);
		dev_err(&cl->dev, "regmap init i2c err: %d\n", ret);
		return ret;
	}

	lp->pdata = pdata;
	lp->dev = &cl->dev;
	i2c_set_clientdata(cl, lp);

	ret = lp8788_platform_init(lp);
	if (ret)
		return ret;

	ret = lp8788_irq_init(lp, cl->irq);
	if (ret)
		return ret;

	return mfd_add_devices(lp->dev, -1, lp8788_devs,
			       ARRAY_SIZE(lp8788_devs), NULL, 0, NULL);
}

static int lp8788_remove(struct i2c_client *cl)
{
	struct lp8788 *lp = i2c_get_clientdata(cl);

	mfd_remove_devices(lp->dev);
	lp8788_irq_exit(lp);
	return 0;
}

static const struct i2c_device_id lp8788_ids[] = {
	{"lp8788", 0},
	{ }
};
MODULE_DEVICE_TABLE(i2c, lp8788_ids);

static struct i2c_driver lp8788_driver = {
	.driver = {
		.name = "lp8788",
	},
	.probe = lp8788_probe,
	.remove = lp8788_remove,
	.id_table = lp8788_ids,
};

static int __init lp8788_init(void)
{
	return i2c_add_driver(&lp8788_driver);
}
subsys_initcall(lp8788_init);

static void __exit lp8788_exit(void)
{
	i2c_del_driver(&lp8788_driver);
}
module_exit(lp8788_exit);

MODULE_DESCRIPTION("TI LP8788 MFD Driver");
MODULE_AUTHOR("Milo Kim");
MODULE_LICENSE("GPL");