1 /*
2 * (C) Copyright 2017 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/lp87565.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 = "buck", .driver = LP87565_BUCK_DRIVER },
22 { },
23 };
24
lp87565_write(struct udevice * dev,uint reg,const uint8_t * buff,int len)25 static int lp87565_write(struct udevice *dev, uint reg, const uint8_t *buff,
26 int len)
27 {
28 int ret;
29
30 ret = dm_i2c_write(dev, reg, buff, len);
31 if (ret)
32 pr_err("write error to device: %p register: %#x!", dev, reg);
33
34 return ret;
35 }
36
lp87565_read(struct udevice * dev,uint reg,uint8_t * buff,int len)37 static int lp87565_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 from device: %p register: %#x!", dev, reg);
44
45 return ret;
46 }
47
lp87565_bind(struct udevice * dev)48 static int lp87565_bind(struct udevice *dev)
49 {
50 ofnode regulators_node;
51 int children;
52
53 regulators_node = dev_read_subnode(dev, "regulators");
54 if (!ofnode_valid(regulators_node)) {
55 debug("%s: %s regulators subnode not found!", __func__,
56 dev->name);
57 return -ENXIO;
58 }
59
60 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
61
62 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
63 if (!children)
64 printf("%s: %s - no child found\n", __func__, dev->name);
65
66 /* Always return success for this device */
67 return 0;
68 }
69
70 static struct dm_pmic_ops lp87565_ops = {
71 .read = lp87565_read,
72 .write = lp87565_write,
73 };
74
75 static const struct udevice_id lp87565_ids[] = {
76 { .compatible = "ti,lp87565", .data = LP87565 },
77 { .compatible = "ti,lp87565-q1", .data = LP87565_Q1 },
78 { }
79 };
80
81 U_BOOT_DRIVER(pmic_lp87565) = {
82 .name = "lp87565_pmic",
83 .id = UCLASS_PMIC,
84 .of_match = lp87565_ids,
85 .bind = lp87565_bind,
86 .ops = &lp87565_ops,
87 };
88