blob: 4ae4043b943727d209bb1fb29bfef98664f6a720 [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Keerthyca1de0b2016-09-30 09:34:02 +05302/*
3 * (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
4 * Keerthy <j-keerthy@ti.com>
Keerthyca1de0b2016-09-30 09:34:02 +05305 */
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
Keerthyca1de0b2016-09-30 09:34:02 +053017static 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
23static 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)) {
Simon Glassc83c4362018-11-18 08:14:28 -070027 pr_err("write error to device: %p register: %#x!\n", dev, reg);
Keerthyca1de0b2016-09-30 09:34:02 +053028 return -EIO;
29 }
30
31 return 0;
32}
33
34static int lp873x_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
35{
36 if (dm_i2c_read(dev, reg, buff, len)) {
Simon Glassc83c4362018-11-18 08:14:28 -070037 pr_err("read error from device: %p register: %#x!\n", dev, reg);
Keerthyca1de0b2016-09-30 09:34:02 +053038 return -EIO;
39 }
40
41 return 0;
42}
43
44static int lp873x_bind(struct udevice *dev)
45{
Simon Glass7a869e62017-05-18 20:09:32 -060046 ofnode regulators_node;
Keerthyca1de0b2016-09-30 09:34:02 +053047 int children;
Keerthyca1de0b2016-09-30 09:34:02 +053048
Simon Glass7a869e62017-05-18 20:09:32 -060049 regulators_node = dev_read_subnode(dev, "regulators");
50 if (!ofnode_valid(regulators_node)) {
Simon Glassc83c4362018-11-18 08:14:28 -070051 debug("%s: %s regulators subnode not found!\n", __func__,
Simon Glass7a869e62017-05-18 20:09:32 -060052 dev->name);
Keerthyca1de0b2016-09-30 09:34:02 +053053 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
64static struct dm_pmic_ops lp873x_ops = {
65 .read = lp873x_read,
66 .write = lp873x_write,
67};
68
69static const struct udevice_id lp873x_ids[] = {
70 { .compatible = "ti,lp8732", .data = LP8732 },
71 { .compatible = "ti,lp8733" , .data = LP8733 },
72 { }
73};
74
75U_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};