blob: 075fe7e2f15c01acdd7da2597e56c4dc87272650 [file] [log] [blame]
Simon Glassd308c012015-07-02 18:16:00 -06001/*
2 * Copyright (C) 2015 Google, Inc
3 *
4 * SPDX-License-Identifier: GPL-2.0+
5 */
6
7#include <common.h>
8#include <fdtdec.h>
9#include <errno.h>
10#include <dm.h>
11#include <i2c.h>
12#include <power/pmic.h>
13#include <power/regulator.h>
14#include <power/s5m8767.h>
15
16DECLARE_GLOBAL_DATA_PTR;
17
18static const struct pmic_child_info pmic_children_info[] = {
19 { .prefix = "LDO", .driver = S5M8767_LDO_DRIVER },
20 { .prefix = "BUCK", .driver = S5M8767_BUCK_DRIVER },
21 { },
22};
23
24static int s5m8767_reg_count(struct udevice *dev)
25{
26 return S5M8767_NUM_OF_REGS;
27}
28
29static int s5m8767_write(struct udevice *dev, uint reg, const uint8_t *buff,
30 int len)
31{
32 if (dm_i2c_write(dev, reg, buff, len)) {
33 error("write error to device: %p register: %#x!", dev, reg);
34 return -EIO;
35 }
36
37 return 0;
38}
39
40static int s5m8767_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
41{
42 if (dm_i2c_read(dev, reg, buff, len)) {
43 error("read error from device: %p register: %#x!", dev, reg);
44 return -EIO;
45 }
46
47 return 0;
48}
49
50int s5m8767_enable_32khz_cp(struct udevice *dev)
51{
52 return pmic_clrsetbits(dev, S5M8767_EN32KHZ_CP, 0, 1 << 1);
53}
54
55static int s5m8767_bind(struct udevice *dev)
56{
57 int node;
58 const void *blob = gd->fdt_blob;
59 int children;
60
61 node = fdt_subnode_offset(blob, dev->of_offset, "regulators");
62 if (node <= 0) {
63 debug("%s: %s regulators subnode not found!", __func__,
64 dev->name);
65 return -ENXIO;
66 }
67
68 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
69
70 children = pmic_bind_children(dev, node, pmic_children_info);
71 if (!children)
72 debug("%s: %s - no child found\n", __func__, dev->name);
73
74 /* Always return success for this device */
75 return 0;
76}
77
78static struct dm_pmic_ops s5m8767_ops = {
79 .reg_count = s5m8767_reg_count,
80 .read = s5m8767_read,
81 .write = s5m8767_write,
82};
83
84static const struct udevice_id s5m8767_ids[] = {
85 { .compatible = "samsung,s5m8767-pmic" },
86 { }
87};
88
89U_BOOT_DRIVER(pmic_s5m8767) = {
90 .name = "s5m8767_pmic",
91 .id = UCLASS_PMIC,
92 .of_match = s5m8767_ids,
93 .bind = s5m8767_bind,
94 .ops = &s5m8767_ops,
95};