blob: ff096b3a9ccb5475e233d5259bf240aec3b2f7be [file] [log] [blame]
Simon Glassd2c88f72015-08-30 16:55:29 -06001/*
2 * Copyright (C) 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8#include <common.h>
9#include <dm.h>
10#include <errno.h>
11#include <fdtdec.h>
12#include <libfdt.h>
13#include <power/act8846_pmic.h>
14#include <power/pmic.h>
15
16DECLARE_GLOBAL_DATA_PTR;
17
18static const struct pmic_child_info pmic_children_info[] = {
19 { .prefix = "REG", .driver = "act8846_reg"},
20 { },
21};
22
23static int act8846_reg_count(struct udevice *dev)
24{
25 return ACT8846_NUM_OF_REGS;
26}
27
28static int act8846_write(struct udevice *dev, uint reg, const uint8_t *buff,
29 int len)
30{
31 if (dm_i2c_write(dev, reg, buff, len)) {
32 debug("write error to device: %p register: %#x!", dev, reg);
33 return -EIO;
34 }
35
36 return 0;
37}
38
39static int act8846_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
40{
41 if (dm_i2c_read(dev, reg, buff, len)) {
42 debug("read error from device: %p register: %#x!", dev, reg);
43 return -EIO;
44 }
45
46 return 0;
47}
48
49static int act8846_bind(struct udevice *dev)
50{
51 const void *blob = gd->fdt_blob;
52 int regulators_node;
53 int children;
54
55 regulators_node = fdt_subnode_offset(blob, dev->of_offset,
56 "regulators");
57 if (regulators_node <= 0) {
58 debug("%s: %s regulators subnode not found!", __func__,
59 dev->name);
60 return -ENXIO;
61 }
62
63 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
64
65 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
66 if (!children)
67 debug("%s: %s - no child found\n", __func__, dev->name);
68
69 /* Always return success for this device */
70 return 0;
71}
72
73static struct dm_pmic_ops act8846_ops = {
74 .reg_count = act8846_reg_count,
75 .read = act8846_read,
76 .write = act8846_write,
77};
78
79static const struct udevice_id act8846_ids[] = {
80 { .compatible = "active-semi,act8846" },
81 { }
82};
83
84U_BOOT_DRIVER(pmic_act8846) = {
85 .name = "act8846 pmic",
86 .id = UCLASS_PMIC,
87 .of_match = act8846_ids,
88 .bind = act8846_bind,
89 .ops = &act8846_ops,
90};