1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (C) 2015 Google, Inc
3*4882a593Smuzhiyun * Written by Simon Glass <sjg@chromium.org>
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <common.h>
9*4882a593Smuzhiyun #include <dm.h>
10*4882a593Smuzhiyun #include <errno.h>
11*4882a593Smuzhiyun #include <fdtdec.h>
12*4882a593Smuzhiyun #include <linux/libfdt.h>
13*4882a593Smuzhiyun #include <power/act8846_pmic.h>
14*4882a593Smuzhiyun #include <power/pmic.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun DECLARE_GLOBAL_DATA_PTR;
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun static const struct pmic_child_info pmic_children_info[] = {
19*4882a593Smuzhiyun { .prefix = "REG", .driver = "act8846_reg"},
20*4882a593Smuzhiyun { },
21*4882a593Smuzhiyun };
22*4882a593Smuzhiyun
act8846_reg_count(struct udevice * dev)23*4882a593Smuzhiyun static int act8846_reg_count(struct udevice *dev)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun return ACT8846_NUM_OF_REGS;
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
act8846_write(struct udevice * dev,uint reg,const uint8_t * buff,int len)28*4882a593Smuzhiyun static int act8846_write(struct udevice *dev, uint reg, const uint8_t *buff,
29*4882a593Smuzhiyun int len)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun if (dm_i2c_write(dev, reg, buff, len)) {
32*4882a593Smuzhiyun debug("write error to device: %p register: %#x!\n", dev, reg);
33*4882a593Smuzhiyun return -EIO;
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun return 0;
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
act8846_read(struct udevice * dev,uint reg,uint8_t * buff,int len)39*4882a593Smuzhiyun static int act8846_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun if (dm_i2c_read(dev, reg, buff, len)) {
42*4882a593Smuzhiyun debug("read error from device: %p register: %#x!\n", dev, reg);
43*4882a593Smuzhiyun return -EIO;
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun return 0;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
act8846_bind(struct udevice * dev)49*4882a593Smuzhiyun static int act8846_bind(struct udevice *dev)
50*4882a593Smuzhiyun {
51*4882a593Smuzhiyun ofnode regulators_node;
52*4882a593Smuzhiyun int children;
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun regulators_node = dev_read_subnode(dev, "regulators");
55*4882a593Smuzhiyun if (!ofnode_valid(regulators_node)) {
56*4882a593Smuzhiyun debug("%s: %s regulators subnode not found!", __func__,
57*4882a593Smuzhiyun dev->name);
58*4882a593Smuzhiyun return -ENXIO;
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun children = pmic_bind_children(dev, regulators_node, pmic_children_info);
64*4882a593Smuzhiyun if (!children)
65*4882a593Smuzhiyun debug("%s: %s - no child found\n", __func__, dev->name);
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun /* Always return success for this device */
68*4882a593Smuzhiyun return 0;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun static struct dm_pmic_ops act8846_ops = {
72*4882a593Smuzhiyun .reg_count = act8846_reg_count,
73*4882a593Smuzhiyun .read = act8846_read,
74*4882a593Smuzhiyun .write = act8846_write,
75*4882a593Smuzhiyun };
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun static const struct udevice_id act8846_ids[] = {
78*4882a593Smuzhiyun { .compatible = "active-semi,act8846" },
79*4882a593Smuzhiyun { }
80*4882a593Smuzhiyun };
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun U_BOOT_DRIVER(pmic_act8846) = {
83*4882a593Smuzhiyun .name = "act8846 pmic",
84*4882a593Smuzhiyun .id = UCLASS_PMIC,
85*4882a593Smuzhiyun .of_match = act8846_ids,
86*4882a593Smuzhiyun .bind = act8846_bind,
87*4882a593Smuzhiyun .ops = &act8846_ops,
88*4882a593Smuzhiyun };
89