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 <fdtdec.h>
8 #include <errno.h>
9 #include <dm.h>
10 #include <i2c.h>
11 #include <log.h>
12 #include <power/pmic.h>
13 #include <power/regulator.h>
14 #include <power/tps65219.h>
15 #include <dm/device.h>
16
17 static const struct pmic_child_info pmic_children_info[] = {
18 { .prefix = "ldo", .driver = TPS65219_LDO_DRIVER },
19 { .prefix = "buck", .driver = TPS65219_BUCK_DRIVER },
20 { },
21 };
22
tps65219_reg_count(struct udevice * dev)23 static int tps65219_reg_count(struct udevice *dev)
24 {
25 return 0x41;
26 }
27
tps65219_write(struct udevice * dev,uint reg,const uint8_t * buff,int len)28 static int tps65219_write(struct udevice *dev, uint reg, const uint8_t *buff,
29 int len)
30 {
31 if (dm_i2c_write(dev, reg, buff, len)) {
32 pr_err("write error to device: %p register: %#x!\n", dev, reg);
33 return -EIO;
34 }
35
36 return 0;
37 }
38
tps65219_read(struct udevice * dev,uint reg,uint8_t * buff,int len)39 static int tps65219_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
40 {
41 if (dm_i2c_read(dev, reg, buff, len)) {
42 pr_err("read error from device: %p register: %#x!\n", dev, reg);
43 return -EIO;
44 }
45
46 return 0;
47 }
48
tps65219_bind(struct udevice * dev)49 static int tps65219_bind(struct udevice *dev)
50 {
51 ofnode regulators_node;
52 int children;
53
54 regulators_node = dev_read_subnode(dev, "regulators");
55 if (!ofnode_valid(regulators_node)) {
56 debug("%s: %s regulators subnode not found!\n", __func__,
57 dev->name);
58 }
59
60 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
61
62 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
63 if (!children)
64 printf("%s: %s - no child found\n", __func__, dev->name);
65
66 /* Probe all the child devices */
67 return dm_scan_fdt_dev(dev);
68 }
69
70 static struct dm_pmic_ops tps65219_ops = {
71 .reg_count = tps65219_reg_count,
72 .read = tps65219_read,
73 .write = tps65219_write,
74 };
75
76 static const struct udevice_id tps65219_ids[] = {
77 { .compatible = "ti,tps65219" },
78 { }
79 };
80
81 U_BOOT_DRIVER(pmic_tps65219) = {
82 .name = "tps65219_pmic",
83 .id = UCLASS_PMIC,
84 .of_match = tps65219_ids,
85 .bind = tps65219_bind,
86 .ops = &tps65219_ops,
87 };
88