xref: /openbmc/u-boot/drivers/power/pmic/palmas.c (revision 9450ab2b)
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/palmas.h>
15 #include <dm/device.h>
16 
17 static const struct pmic_child_info pmic_children_info[] = {
18 	{ .prefix = "ldo", .driver = PALMAS_LDO_DRIVER },
19 	{ .prefix = "smps", .driver = PALMAS_SMPS_DRIVER },
20 	{ },
21 };
22 
palmas_write(struct udevice * dev,uint reg,const uint8_t * buff,int len)23 static int palmas_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!\n", dev, reg);
28 		return -EIO;
29 	}
30 
31 	return 0;
32 }
33 
palmas_read(struct udevice * dev,uint reg,uint8_t * buff,int len)34 static int palmas_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!\n", dev, reg);
38 		return -EIO;
39 	}
40 
41 	return 0;
42 }
43 
palmas_bind(struct udevice * dev)44 static int palmas_bind(struct udevice *dev)
45 {
46 	ofnode pmic_node = ofnode_null(), regulators_node;
47 	ofnode subnode;
48 	int children;
49 
50 	dev_for_each_subnode(subnode, dev) {
51 		const char *name;
52 		char *temp;
53 
54 		name = ofnode_get_name(subnode);
55 		temp = strstr(name, "pmic");
56 		if (temp) {
57 			pmic_node = subnode;
58 			break;
59 		}
60 	}
61 
62 	if (!ofnode_valid(pmic_node)) {
63 		debug("%s: %s pmic subnode not found!\n", __func__, dev->name);
64 		return -ENXIO;
65 	}
66 
67 	regulators_node = ofnode_find_subnode(pmic_node, "regulators");
68 
69 	if (!ofnode_valid(regulators_node)) {
70 		debug("%s: %s reg subnode not found!\n", __func__, dev->name);
71 		return -ENXIO;
72 	}
73 
74 	children = pmic_bind_children(dev, regulators_node, pmic_children_info);
75 	if (!children)
76 		debug("%s: %s - no child found\n", __func__, dev->name);
77 
78 	/* Always return success for this device */
79 	return 0;
80 }
81 
82 static struct dm_pmic_ops palmas_ops = {
83 	.read = palmas_read,
84 	.write = palmas_write,
85 };
86 
87 static const struct udevice_id palmas_ids[] = {
88 	{ .compatible = "ti,tps659038", .data = TPS659038 },
89 	{ .compatible = "ti,tps65917" , .data = TPS65917 },
90 	{ }
91 };
92 
93 U_BOOT_DRIVER(pmic_palmas) = {
94 	.name = "palmas_pmic",
95 	.id = UCLASS_PMIC,
96 	.of_match = palmas_ids,
97 	.bind = palmas_bind,
98 	.ops = &palmas_ops,
99 };
100