1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2022 BayLibre, SAS
4 * Author: Neil Armstrong <narmstrong@baylibre.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/tps65219.h>
16 #include <dm/device.h>
17
18 static const struct pmic_child_info pmic_children_info[] = {
19 { .prefix = "ldo", .driver = TPS65219_LDO_DRIVER },
20 { .prefix = "buck", .driver = TPS65219_BUCK_DRIVER },
21 { },
22 };
23
tps65219_reg_count(struct udevice * dev)24 static int tps65219_reg_count(struct udevice *dev)
25 {
26 return 0x41;
27 }
28
tps65219_write(struct udevice * dev,uint reg,const uint8_t * buff,int len)29 static int tps65219_write(struct udevice *dev, uint reg, const uint8_t *buff,
30 int len)
31 {
32 if (dm_i2c_write(dev, reg, buff, len)) {
33 pr_err("write error to device: %p register: %#x!\n", dev, reg);
34 return -EIO;
35 }
36
37 return 0;
38 }
39
tps65219_read(struct udevice * dev,uint reg,uint8_t * buff,int len)40 static int tps65219_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
41 {
42 if (dm_i2c_read(dev, reg, buff, len)) {
43 pr_err("read error from device: %p register: %#x!\n", dev, reg);
44 return -EIO;
45 }
46
47 return 0;
48 }
49
tps65219_bind(struct udevice * dev)50 static int tps65219_bind(struct udevice *dev)
51 {
52 ofnode regulators_node;
53 int children;
54
55 regulators_node = dev_read_subnode(dev, "regulators");
56 if (!ofnode_valid(regulators_node)) {
57 debug("%s: %s regulators subnode not found!\n", __func__,
58 dev->name);
59 }
60
61 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
62
63 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
64 if (!children)
65 printf("%s: %s - no child found\n", __func__, dev->name);
66
67 /* Probe all the child devices */
68 return dm_scan_fdt_dev(dev);
69 }
70
71 static struct dm_pmic_ops tps65219_ops = {
72 .reg_count = tps65219_reg_count,
73 .read = tps65219_read,
74 .write = tps65219_write,
75 };
76
77 static const struct udevice_id tps65219_ids[] = {
78 { .compatible = "ti,tps65219" },
79 { }
80 };
81
82 U_BOOT_DRIVER(pmic_tps65219) = {
83 .name = "tps65219_pmic",
84 .id = UCLASS_PMIC,
85 .of_match = tps65219_ids,
86 .bind = tps65219_bind,
87 .ops = &tps65219_ops,
88 };
89