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