1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
3*4882a593Smuzhiyun * Keerthy <j-keerthy@ti.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/palmas.h>
16*4882a593Smuzhiyun #include <dm/device.h>
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun DECLARE_GLOBAL_DATA_PTR;
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun static const struct pmic_child_info pmic_children_info[] = {
21*4882a593Smuzhiyun { .prefix = "ldo", .driver = PALMAS_LDO_DRIVER },
22*4882a593Smuzhiyun { .prefix = "smps", .driver = PALMAS_SMPS_DRIVER },
23*4882a593Smuzhiyun { },
24*4882a593Smuzhiyun };
25*4882a593Smuzhiyun
palmas_write(struct udevice * dev,uint reg,const uint8_t * buff,int len)26*4882a593Smuzhiyun static int palmas_write(struct udevice *dev, uint reg, const uint8_t *buff,
27*4882a593Smuzhiyun int len)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun if (dm_i2c_write(dev, reg, buff, len)) {
30*4882a593Smuzhiyun pr_err("write error to device: %p register: %#x!", dev, reg);
31*4882a593Smuzhiyun return -EIO;
32*4882a593Smuzhiyun }
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun return 0;
35*4882a593Smuzhiyun }
36*4882a593Smuzhiyun
palmas_read(struct udevice * dev,uint reg,uint8_t * buff,int len)37*4882a593Smuzhiyun static int palmas_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
38*4882a593Smuzhiyun {
39*4882a593Smuzhiyun if (dm_i2c_read(dev, reg, buff, len)) {
40*4882a593Smuzhiyun pr_err("read error from device: %p register: %#x!", dev, reg);
41*4882a593Smuzhiyun return -EIO;
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun return 0;
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun
palmas_bind(struct udevice * dev)47*4882a593Smuzhiyun static int palmas_bind(struct udevice *dev)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun ofnode pmic_node = ofnode_null(), regulators_node;
50*4882a593Smuzhiyun ofnode subnode;
51*4882a593Smuzhiyun int children;
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun dev_for_each_subnode(subnode, dev) {
54*4882a593Smuzhiyun const char *name;
55*4882a593Smuzhiyun char *temp;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun name = ofnode_get_name(subnode);
58*4882a593Smuzhiyun temp = strstr(name, "pmic");
59*4882a593Smuzhiyun if (temp) {
60*4882a593Smuzhiyun pmic_node = subnode;
61*4882a593Smuzhiyun break;
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun }
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun if (!ofnode_valid(pmic_node)) {
66*4882a593Smuzhiyun debug("%s: %s pmic subnode not found!", __func__, dev->name);
67*4882a593Smuzhiyun return -ENXIO;
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun regulators_node = ofnode_find_subnode(pmic_node, "regulators");
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun if (!ofnode_valid(regulators_node)) {
73*4882a593Smuzhiyun debug("%s: %s reg subnode not found!", __func__, dev->name);
74*4882a593Smuzhiyun return -ENXIO;
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun children = pmic_bind_children(dev, regulators_node, pmic_children_info);
78*4882a593Smuzhiyun if (!children)
79*4882a593Smuzhiyun debug("%s: %s - no child found\n", __func__, dev->name);
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun /* Always return success for this device */
82*4882a593Smuzhiyun return 0;
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun static struct dm_pmic_ops palmas_ops = {
86*4882a593Smuzhiyun .read = palmas_read,
87*4882a593Smuzhiyun .write = palmas_write,
88*4882a593Smuzhiyun };
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun static const struct udevice_id palmas_ids[] = {
91*4882a593Smuzhiyun { .compatible = "ti,tps659038", .data = TPS659038 },
92*4882a593Smuzhiyun { .compatible = "ti,tps65917" , .data = TPS65917 },
93*4882a593Smuzhiyun { }
94*4882a593Smuzhiyun };
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun U_BOOT_DRIVER(pmic_palmas) = {
97*4882a593Smuzhiyun .name = "palmas_pmic",
98*4882a593Smuzhiyun .id = UCLASS_PMIC,
99*4882a593Smuzhiyun .of_match = palmas_ids,
100*4882a593Smuzhiyun .bind = palmas_bind,
101*4882a593Smuzhiyun .ops = &palmas_ops,
102*4882a593Smuzhiyun };
103