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