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