Merge branch 'master' of git://git.denx.de/u-boot-spi
[platform/kernel/u-boot.git] / drivers / power / pmic / palmas.c
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
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
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
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 };