1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
5 */
6
7 #include <common.h>
8 #include <dm.h>
9 #include <errno.h>
10 #include <fdtdec.h>
11 #include <log.h>
12 #include <linux/libfdt.h>
13 #include <power/act8846_pmic.h>
14 #include <power/pmic.h>
15
16 static const struct pmic_child_info pmic_children_info[] = {
17 { .prefix = "REG", .driver = "act8846_reg"},
18 { },
19 };
20
act8846_reg_count(struct udevice * dev)21 static int act8846_reg_count(struct udevice *dev)
22 {
23 return ACT8846_NUM_OF_REGS;
24 }
25
act8846_write(struct udevice * dev,uint reg,const uint8_t * buff,int len)26 static int act8846_write(struct udevice *dev, uint reg, const uint8_t *buff,
27 int len)
28 {
29 if (dm_i2c_write(dev, reg, buff, len)) {
30 debug("write error to device: %p register: %#x!\n", dev, reg);
31 return -EIO;
32 }
33
34 return 0;
35 }
36
act8846_read(struct udevice * dev,uint reg,uint8_t * buff,int len)37 static int act8846_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
38 {
39 if (dm_i2c_read(dev, reg, buff, len)) {
40 debug("read error from device: %p register: %#x!\n", dev, reg);
41 return -EIO;
42 }
43
44 return 0;
45 }
46
act8846_bind(struct udevice * dev)47 static int act8846_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!\n", __func__,
55 dev->name);
56 return -ENXIO;
57 }
58
59 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
60
61 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
62 if (!children)
63 debug("%s: %s - no child found\n", __func__, dev->name);
64
65 /* Always return success for this device */
66 return 0;
67 }
68
69 static struct dm_pmic_ops act8846_ops = {
70 .reg_count = act8846_reg_count,
71 .read = act8846_read,
72 .write = act8846_write,
73 };
74
75 static const struct udevice_id act8846_ids[] = {
76 { .compatible = "active-semi,act8846" },
77 { }
78 };
79
80 U_BOOT_DRIVER(pmic_act8846) = {
81 .name = "act8846 pmic",
82 .id = UCLASS_PMIC,
83 .of_match = act8846_ids,
84 .bind = act8846_bind,
85 .ops = &act8846_ops,
86 };
87