1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
5 */
6
7 #include <common.h>
8 #include <dm.h>
9 #include <errno.h>
10 #include <fdtdec.h>
11 #include <i2c.h>
12 #include <log.h>
13 #include <power/pmic.h>
14 #include <power/tps65090.h>
15
16 static const struct pmic_child_info pmic_children_info[] = {
17 { .prefix = "fet", .driver = TPS65090_FET_DRIVER },
18 { },
19 };
20
tps65090_reg_count(struct udevice * dev)21 static int tps65090_reg_count(struct udevice *dev)
22 {
23 return TPS65090_NUM_REGS;
24 }
25
tps65090_write(struct udevice * dev,uint reg,const uint8_t * buff,int len)26 static int tps65090_write(struct udevice *dev, uint reg, const uint8_t *buff,
27 int len)
28 {
29 if (dm_i2c_write(dev, reg, buff, len)) {
30 pr_err("write error to device: %p register: %#x!\n", dev, reg);
31 return -EIO;
32 }
33
34 return 0;
35 }
36
tps65090_read(struct udevice * dev,uint reg,uint8_t * buff,int len)37 static int tps65090_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
38 {
39 int ret;
40
41 ret = dm_i2c_read(dev, reg, buff, len);
42 if (ret) {
43 pr_err("read error %d from device: %p register: %#x!\n", ret,
44 dev, reg);
45 return -EIO;
46 }
47
48 return 0;
49 }
50
tps65090_bind(struct udevice * dev)51 static int tps65090_bind(struct udevice *dev)
52 {
53 ofnode regulators_node;
54 int children;
55
56 regulators_node = dev_read_subnode(dev, "regulators");
57 if (!ofnode_valid(regulators_node)) {
58 debug("%s: %s regulators subnode not found!\n", __func__,
59 dev->name);
60 return -ENXIO;
61 }
62
63 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
64
65 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
66 if (!children)
67 debug("%s: %s - no child found\n", __func__, dev->name);
68
69 /* Always return success for this device */
70 return 0;
71 }
72
73 static struct dm_pmic_ops tps65090_ops = {
74 .reg_count = tps65090_reg_count,
75 .read = tps65090_read,
76 .write = tps65090_write,
77 };
78
79 static const struct udevice_id tps65090_ids[] = {
80 { .compatible = "ti,tps65090" },
81 { }
82 };
83
84 U_BOOT_DRIVER(pmic_tps65090) = {
85 .name = "tps65090 pmic",
86 .id = UCLASS_PMIC,
87 .of_match = tps65090_ids,
88 .bind = tps65090_bind,
89 .ops = &tps65090_ops,
90 };
91