xref: /openbmc/u-boot/drivers/power/pmic/lp873x.c (revision a373024e)
1 /*
2  * (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
3  * Keerthy <j-keerthy@ti.com>
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 #include <common.h>
9 #include <fdtdec.h>
10 #include <errno.h>
11 #include <dm.h>
12 #include <i2c.h>
13 #include <power/pmic.h>
14 #include <power/regulator.h>
15 #include <power/lp873x.h>
16 #include <dm/device.h>
17 
18 DECLARE_GLOBAL_DATA_PTR;
19 
20 static const struct pmic_child_info pmic_children_info[] = {
21 	{ .prefix = "ldo", .driver = LP873X_LDO_DRIVER },
22 	{ .prefix = "buck", .driver = LP873X_BUCK_DRIVER },
23 	{ },
24 };
25 
26 static int lp873x_write(struct udevice *dev, uint reg, const uint8_t *buff,
27 			  int len)
28 {
29 	if (dm_i2c_write(dev, reg, buff, len)) {
30 		error("write error to device: %p register: %#x!", dev, reg);
31 		return -EIO;
32 	}
33 
34 	return 0;
35 }
36 
37 static int lp873x_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
38 {
39 	if (dm_i2c_read(dev, reg, buff, len)) {
40 		error("read error from device: %p register: %#x!", dev, reg);
41 		return -EIO;
42 	}
43 
44 	return 0;
45 }
46 
47 static int lp873x_bind(struct udevice *dev)
48 {
49 	ofnode regulators_node;
50 	int children;
51 
52 	regulators_node = dev_read_subnode(dev, "regulators");
53 	if (!ofnode_valid(regulators_node)) {
54 		debug("%s: %s regulators subnode not found!", __func__,
55 		      dev->name);
56 		return -ENXIO;
57 	}
58 
59 	children = pmic_bind_children(dev, regulators_node, pmic_children_info);
60 	if (!children)
61 		printf("%s: %s - no child found\n", __func__, dev->name);
62 
63 	/* Always return success for this device */
64 	return 0;
65 }
66 
67 static struct dm_pmic_ops lp873x_ops = {
68 	.read = lp873x_read,
69 	.write = lp873x_write,
70 };
71 
72 static const struct udevice_id lp873x_ids[] = {
73 	{ .compatible = "ti,lp8732", .data = LP8732 },
74 	{ .compatible = "ti,lp8733" , .data = LP8733 },
75 	{ }
76 };
77 
78 U_BOOT_DRIVER(pmic_lp873x) = {
79 	.name = "lp873x_pmic",
80 	.id = UCLASS_PMIC,
81 	.of_match = lp873x_ids,
82 	.bind = lp873x_bind,
83 	.ops = &lp873x_ops,
84 };
85