summaryrefslogtreecommitdiff
path: root/drivers/power/pmic/s5m8767.c
blob: 25d673b9981052cadd12e8c61fddd67315a4c215 (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
/*
 * Copyright (C) 2015 Google, Inc
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <fdtdec.h>
#include <errno.h>
#include <dm.h>
#include <i2c.h>
#include <power/pmic.h>
#include <power/regulator.h>
#include <power/s5m8767.h>

DECLARE_GLOBAL_DATA_PTR;

static const struct pmic_child_info pmic_children_info[] = {
	{ .prefix = "LDO", .driver = S5M8767_LDO_DRIVER },
	{ .prefix = "BUCK", .driver = S5M8767_BUCK_DRIVER },
	{ },
};

static int s5m8767_reg_count(struct udevice *dev)
{
	return S5M8767_NUM_OF_REGS;
}

static int s5m8767_write(struct udevice *dev, uint reg, const uint8_t *buff,
			  int len)
{
	if (dm_i2c_write(dev, reg, buff, len)) {
		error("write error to device: %p register: %#x!", dev, reg);
		return -EIO;
	}

	return 0;
}

static int s5m8767_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
{
	if (dm_i2c_read(dev, reg, buff, len)) {
		error("read error from device: %p register: %#x!", dev, reg);
		return -EIO;
	}

	return 0;
}

int s5m8767_enable_32khz_cp(struct udevice *dev)
{
	return pmic_clrsetbits(dev, S5M8767_EN32KHZ_CP, 0, 1 << 1);
}

static int s5m8767_bind(struct udevice *dev)
{
	int node;
	const void *blob = gd->fdt_blob;
	int children;

	node = fdt_subnode_offset(blob, dev_of_offset(dev), "regulators");
	if (node <= 0) {
		debug("%s: %s regulators subnode not found!", __func__,
		      dev->name);
		return -ENXIO;
	}

	debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);

	children = pmic_bind_children(dev, node, pmic_children_info);
	if (!children)
		debug("%s: %s - no child found\n", __func__, dev->name);

	/* Always return success for this device */
	return 0;
}

static struct dm_pmic_ops s5m8767_ops = {
	.reg_count = s5m8767_reg_count,
	.read = s5m8767_read,
	.write = s5m8767_write,
};

static const struct udevice_id s5m8767_ids[] = {
	{ .compatible = "samsung,s5m8767-pmic" },
	{ }
};

U_BOOT_DRIVER(pmic_s5m8767) = {
	.name = "s5m8767_pmic",
	.id = UCLASS_PMIC,
	.of_match = s5m8767_ids,
	.bind = s5m8767_bind,
	.ops = &s5m8767_ops,
};