1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2015 Samsung Electronics
4 * Przemyslaw Marczak <p.marczak@samsung.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 <log.h>
13 #include <power/pmic.h>
14 #include <power/s2mps11.h>
15
16 static const struct pmic_child_info pmic_children_info[] = {
17 { .prefix = S2MPS11_OF_LDO_PREFIX, .driver = S2MPS11_LDO_DRIVER },
18 { .prefix = S2MPS11_OF_BUCK_PREFIX, .driver = S2MPS11_BUCK_DRIVER },
19 { },
20 };
21
s2mps11_reg_count(struct udevice * dev)22 static int s2mps11_reg_count(struct udevice *dev)
23 {
24 return S2MPS11_REG_COUNT;
25 }
26
s2mps11_write(struct udevice * dev,uint reg,const uint8_t * buff,int len)27 static int s2mps11_write(struct udevice *dev, uint reg, const uint8_t *buff,
28 int len)
29 {
30 int ret;
31
32 ret = dm_i2c_write(dev, reg, buff, len);
33 if (ret)
34 pr_err("write error to device: %p register: %#x!\n", dev, reg);
35
36 return ret;
37 }
38
s2mps11_read(struct udevice * dev,uint reg,uint8_t * buff,int len)39 static int s2mps11_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
40 {
41 int ret;
42
43 ret = dm_i2c_read(dev, reg, buff, len);
44 if (ret)
45 pr_err("read error from device: %p register: %#x!\n", dev, reg);
46
47 return ret;
48 }
49
s2mps11_probe(struct udevice * dev)50 static int s2mps11_probe(struct udevice *dev)
51 {
52 ofnode regulators_node;
53 int children;
54
55 regulators_node = dev_read_subnode(dev, "voltage-regulators");
56 if (!ofnode_valid(regulators_node)) {
57 debug("%s: %s regulators subnode not found!\n", __func__,
58 dev->name);
59 return -ENXIO;
60 }
61
62 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
63
64 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
65 if (!children)
66 debug("%s: %s - no child found\n", __func__, dev->name);
67
68 return 0;
69 }
70
71 static struct dm_pmic_ops s2mps11_ops = {
72 .reg_count = s2mps11_reg_count,
73 .read = s2mps11_read,
74 .write = s2mps11_write,
75 };
76
77 static const struct udevice_id s2mps11_ids[] = {
78 { .compatible = "samsung,s2mps11-pmic" },
79 { }
80 };
81
82 U_BOOT_DRIVER(pmic_s2mps11) = {
83 .name = "s2mps11_pmic",
84 .id = UCLASS_PMIC,
85 .of_match = s2mps11_ids,
86 .ops = &s2mps11_ops,
87 .probe = s2mps11_probe,
88 };
89