1 /*
2 * (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
3 * Keerthy <j-keerthy@ti.com>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8 #include <common.h>
9 #include <fdtdec.h>
10 #include <errno.h>
11 #include <dm.h>
12 #include <i2c.h>
13 #include <power/pmic.h>
14 #include <power/regulator.h>
15 #include <power/palmas.h>
16 #include <dm/device.h>
17
18 DECLARE_GLOBAL_DATA_PTR;
19
20 static const struct pmic_child_info pmic_children_info[] = {
21 { .prefix = "ldo", .driver = PALMAS_LDO_DRIVER },
22 { .prefix = "smps", .driver = PALMAS_SMPS_DRIVER },
23 { },
24 };
25
palmas_write(struct udevice * dev,uint reg,const uint8_t * buff,int len)26 static int palmas_write(struct udevice *dev, uint reg, const uint8_t *buff,
27 int len)
28 {
29 if (dm_i2c_write(dev, reg, buff, len)) {
30 pr_err("write error to device: %p register: %#x!", dev, reg);
31 return -EIO;
32 }
33
34 return 0;
35 }
36
palmas_read(struct udevice * dev,uint reg,uint8_t * buff,int len)37 static int palmas_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
38 {
39 if (dm_i2c_read(dev, reg, buff, len)) {
40 pr_err("read error from device: %p register: %#x!", dev, reg);
41 return -EIO;
42 }
43
44 return 0;
45 }
46
palmas_bind(struct udevice * dev)47 static int palmas_bind(struct udevice *dev)
48 {
49 ofnode pmic_node = ofnode_null(), regulators_node;
50 ofnode subnode;
51 int children;
52
53 dev_for_each_subnode(subnode, dev) {
54 const char *name;
55 char *temp;
56
57 name = ofnode_get_name(subnode);
58 temp = strstr(name, "pmic");
59 if (temp) {
60 pmic_node = subnode;
61 break;
62 }
63 }
64
65 if (!ofnode_valid(pmic_node)) {
66 debug("%s: %s pmic subnode not found!", __func__, dev->name);
67 return -ENXIO;
68 }
69
70 regulators_node = ofnode_find_subnode(pmic_node, "regulators");
71
72 if (!ofnode_valid(regulators_node)) {
73 debug("%s: %s reg subnode not found!", __func__, dev->name);
74 return -ENXIO;
75 }
76
77 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
78 if (!children)
79 debug("%s: %s - no child found\n", __func__, dev->name);
80
81 /* Always return success for this device */
82 return 0;
83 }
84
85 static struct dm_pmic_ops palmas_ops = {
86 .read = palmas_read,
87 .write = palmas_write,
88 };
89
90 static const struct udevice_id palmas_ids[] = {
91 { .compatible = "ti,tps659038", .data = TPS659038 },
92 { .compatible = "ti,tps65917" , .data = TPS65917 },
93 { }
94 };
95
96 U_BOOT_DRIVER(pmic_palmas) = {
97 .name = "palmas_pmic",
98 .id = UCLASS_PMIC,
99 .of_match = palmas_ids,
100 .bind = palmas_bind,
101 .ops = &palmas_ops,
102 };
103