1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (C) 2014-2015 Samsung Electronics
3*4882a593Smuzhiyun * Przemyslaw Marczak <p.marczak@samsung.com>
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <common.h>
9*4882a593Smuzhiyun #include <fdtdec.h>
10*4882a593Smuzhiyun #include <errno.h>
11*4882a593Smuzhiyun #include <dm.h>
12*4882a593Smuzhiyun #include <i2c.h>
13*4882a593Smuzhiyun #include <power/pmic.h>
14*4882a593Smuzhiyun #include <power/regulator.h>
15*4882a593Smuzhiyun #include <power/max77686_pmic.h>
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun DECLARE_GLOBAL_DATA_PTR;
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun static const struct pmic_child_info pmic_children_info[] = {
20*4882a593Smuzhiyun { .prefix = "LDO", .driver = MAX77686_LDO_DRIVER },
21*4882a593Smuzhiyun { .prefix = "BUCK", .driver = MAX77686_BUCK_DRIVER },
22*4882a593Smuzhiyun { },
23*4882a593Smuzhiyun };
24*4882a593Smuzhiyun
max77686_reg_count(struct udevice * dev)25*4882a593Smuzhiyun static int max77686_reg_count(struct udevice *dev)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun return MAX77686_NUM_OF_REGS;
28*4882a593Smuzhiyun }
29*4882a593Smuzhiyun
max77686_write(struct udevice * dev,uint reg,const uint8_t * buff,int len)30*4882a593Smuzhiyun static int max77686_write(struct udevice *dev, uint reg, const uint8_t *buff,
31*4882a593Smuzhiyun int len)
32*4882a593Smuzhiyun {
33*4882a593Smuzhiyun if (dm_i2c_write(dev, reg, buff, len)) {
34*4882a593Smuzhiyun pr_err("write error to device: %p register: %#x!", dev, reg);
35*4882a593Smuzhiyun return -EIO;
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun return 0;
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun
max77686_read(struct udevice * dev,uint reg,uint8_t * buff,int len)41*4882a593Smuzhiyun static int max77686_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
42*4882a593Smuzhiyun {
43*4882a593Smuzhiyun if (dm_i2c_read(dev, reg, buff, len)) {
44*4882a593Smuzhiyun pr_err("read error from device: %p register: %#x!", dev, reg);
45*4882a593Smuzhiyun return -EIO;
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun return 0;
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun
max77686_bind(struct udevice * dev)51*4882a593Smuzhiyun static int max77686_bind(struct udevice *dev)
52*4882a593Smuzhiyun {
53*4882a593Smuzhiyun ofnode regulators_node;
54*4882a593Smuzhiyun int children;
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun regulators_node = dev_read_subnode(dev, "voltage-regulators");
57*4882a593Smuzhiyun if (!ofnode_valid(regulators_node)) {
58*4882a593Smuzhiyun debug("%s: %s regulators subnode not found!", __func__,
59*4882a593Smuzhiyun dev->name);
60*4882a593Smuzhiyun return -ENXIO;
61*4882a593Smuzhiyun }
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun children = pmic_bind_children(dev, regulators_node, pmic_children_info);
66*4882a593Smuzhiyun if (!children)
67*4882a593Smuzhiyun debug("%s: %s - no child found\n", __func__, dev->name);
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun /* Always return success for this device */
70*4882a593Smuzhiyun return 0;
71*4882a593Smuzhiyun }
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun static struct dm_pmic_ops max77686_ops = {
74*4882a593Smuzhiyun .reg_count = max77686_reg_count,
75*4882a593Smuzhiyun .read = max77686_read,
76*4882a593Smuzhiyun .write = max77686_write,
77*4882a593Smuzhiyun };
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun static const struct udevice_id max77686_ids[] = {
80*4882a593Smuzhiyun { .compatible = "maxim,max77686" },
81*4882a593Smuzhiyun { }
82*4882a593Smuzhiyun };
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun U_BOOT_DRIVER(pmic_max77686) = {
85*4882a593Smuzhiyun .name = "max77686_pmic",
86*4882a593Smuzhiyun .id = UCLASS_PMIC,
87*4882a593Smuzhiyun .of_match = max77686_ids,
88*4882a593Smuzhiyun .bind = max77686_bind,
89*4882a593Smuzhiyun .ops = &max77686_ops,
90*4882a593Smuzhiyun };
91