1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2020 Gateworks Corporation
4 */
5 #include <common.h>
6 #include <errno.h>
7 #include <dm.h>
8 #include <i2c.h>
9 #include <log.h>
10 #include <power/pmic.h>
11 #include <power/regulator.h>
12 #include <power/mp5416.h>
13 #include <asm/global_data.h>
14
15 DECLARE_GLOBAL_DATA_PTR;
16
17 static const struct pmic_child_info pmic_children_info[] = {
18 /* buck */
19 { .prefix = "b", .driver = MP6416_REGULATOR_DRIVER },
20 /* ldo */
21 { .prefix = "l", .driver = MP6416_REGULATOR_DRIVER },
22 { },
23 };
24
mp5416_reg_count(struct udevice * dev)25 static int mp5416_reg_count(struct udevice *dev)
26 {
27 return MP5416_NUM_OF_REGS - 1;
28 }
29
mp5416_write(struct udevice * dev,uint reg,const uint8_t * buff,int len)30 static int mp5416_write(struct udevice *dev, uint reg, const uint8_t *buff,
31 int len)
32 {
33 if (dm_i2c_write(dev, reg, buff, len)) {
34 pr_err("write error to device: %p register: %#x!", dev, reg);
35 return -EIO;
36 }
37
38 return 0;
39 }
40
mp5416_read(struct udevice * dev,uint reg,uint8_t * buff,int len)41 static int mp5416_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
42 {
43 if (dm_i2c_read(dev, reg, buff, len)) {
44 pr_err("read error from device: %p register: %#x!", dev, reg);
45 return -EIO;
46 }
47
48 return 0;
49 }
50
mp5416_bind(struct udevice * dev)51 static int mp5416_bind(struct udevice *dev)
52 {
53 int children;
54 ofnode regulators_node;
55
56 debug("%s %s\n", __func__, dev->name);
57 regulators_node = dev_read_subnode(dev, "regulators");
58 if (!ofnode_valid(regulators_node)) {
59 debug("%s: %s regulators subnode not found!\n", __func__,
60 dev->name);
61 return -ENXIO;
62 }
63
64 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
65
66 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
67 if (!children)
68 debug("%s: %s - no child found\n", __func__, dev->name);
69
70 /* Always return success for this device */
71 return 0;
72 }
73
mp5416_probe(struct udevice * dev)74 static int mp5416_probe(struct udevice *dev)
75 {
76 debug("%s %s\n", __func__, dev->name);
77
78 return 0;
79 }
80
81 static struct dm_pmic_ops mp5416_ops = {
82 .reg_count = mp5416_reg_count,
83 .read = mp5416_read,
84 .write = mp5416_write,
85 };
86
87 static const struct udevice_id mp5416_ids[] = {
88 { .compatible = "mps,mp5416", },
89 { }
90 };
91
92 U_BOOT_DRIVER(pmic_mp5416) = {
93 .name = "mp5416 pmic",
94 .id = UCLASS_PMIC,
95 .of_match = mp5416_ids,
96 .bind = mp5416_bind,
97 .probe = mp5416_probe,
98 .ops = &mp5416_ops,
99 };
100