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 <log.h>
13 #include <power/pmic.h>
14 #include <power/regulator.h>
15 #include <power/lp873x.h>
16 #include <dm/device.h>
17
18 static const struct pmic_child_info pmic_children_info[] = {
19 { .prefix = "ldo", .driver = LP873X_LDO_DRIVER },
20 { .prefix = "buck", .driver = LP873X_BUCK_DRIVER },
21 { },
22 };
23
lp873x_write(struct udevice * dev,uint reg,const uint8_t * buff,int len)24 static int lp873x_write(struct udevice *dev, uint reg, const uint8_t *buff,
25 int len)
26 {
27 if (dm_i2c_write(dev, reg, buff, len)) {
28 pr_err("write error to device: %p register: %#x!\n", dev, reg);
29 return -EIO;
30 }
31
32 return 0;
33 }
34
lp873x_read(struct udevice * dev,uint reg,uint8_t * buff,int len)35 static int lp873x_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
36 {
37 if (dm_i2c_read(dev, reg, buff, len)) {
38 pr_err("read error from device: %p register: %#x!\n", dev, reg);
39 return -EIO;
40 }
41
42 return 0;
43 }
44
lp873x_bind(struct udevice * dev)45 static int lp873x_bind(struct udevice *dev)
46 {
47 ofnode regulators_node;
48 int children;
49
50 regulators_node = dev_read_subnode(dev, "regulators");
51 if (!ofnode_valid(regulators_node)) {
52 debug("%s: %s regulators subnode not found!\n", __func__,
53 dev->name);
54 return -ENXIO;
55 }
56
57 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
58 if (!children)
59 printf("%s: %s - no child found\n", __func__, dev->name);
60
61 /* Always return success for this device */
62 return 0;
63 }
64
65 static struct dm_pmic_ops lp873x_ops = {
66 .read = lp873x_read,
67 .write = lp873x_write,
68 };
69
70 static const struct udevice_id lp873x_ids[] = {
71 { .compatible = "ti,lp8732", .data = LP8732 },
72 { .compatible = "ti,lp8733" , .data = LP8733 },
73 { }
74 };
75
76 U_BOOT_DRIVER(pmic_lp873x) = {
77 .name = "lp873x_pmic",
78 .id = UCLASS_PMIC,
79 .of_match = lp873x_ids,
80 .bind = lp873x_bind,
81 .ops = &lp873x_ops,
82 };
83