1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2015 Freescale Semiconductor, Inc
4 * Peng Fan <Peng.Fan@freescale.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/regulator.h>
15 #include <power/pfuze100_pmic.h>
16 #include <power/pfuze3000_pmic.h>
17
18 static const struct pmic_child_info pmic_children_info[] = {
19 /* sw[x], swbst */
20 { .prefix = "s", .driver = PFUZE100_REGULATOR_DRIVER },
21 /* vgen[x], vsnvs, vcc, v33, vcc_sd */
22 { .prefix = "v", .driver = PFUZE100_REGULATOR_DRIVER },
23 { },
24 };
25
pfuze100_reg_count(struct udevice * dev)26 static int pfuze100_reg_count(struct udevice *dev)
27 {
28 return dev->driver_data == PFUZE3000 ? PFUZE3000_NUM_OF_REGS : PFUZE100_NUM_OF_REGS;
29 }
30
pfuze100_write(struct udevice * dev,uint reg,const uint8_t * buff,int len)31 static int pfuze100_write(struct udevice *dev, uint reg, const uint8_t *buff,
32 int len)
33 {
34 if (dm_i2c_write(dev, reg, buff, len)) {
35 pr_err("write error to device: %p register: %#x!\n", dev, reg);
36 return -EIO;
37 }
38
39 return 0;
40 }
41
pfuze100_read(struct udevice * dev,uint reg,uint8_t * buff,int len)42 static int pfuze100_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
43 {
44 if (dm_i2c_read(dev, reg, buff, len)) {
45 debug("read error from device: %p register: %#x!\n", dev, reg);
46 return -EIO;
47 }
48
49 return 0;
50 }
51
pfuze100_bind(struct udevice * dev)52 static int pfuze100_bind(struct udevice *dev)
53 {
54 ofnode regulators_node;
55 int children;
56
57 regulators_node = dev_read_subnode(dev, "regulators");
58 if (!ofnode_valid(regulators_node)) {
59 debug("%s: %s regulators subnode not found!\n", __func__,
60 dev->name);
61 return -ENXIO;
62 }
63
64 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
65
66 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
67 if (!children)
68 debug("%s: %s - no child found\n", __func__, dev->name);
69
70 /* Always return success for this device */
71 return 0;
72 }
73
74 static struct dm_pmic_ops pfuze100_ops = {
75 .reg_count = pfuze100_reg_count,
76 .read = pfuze100_read,
77 .write = pfuze100_write,
78 };
79
80 static const struct udevice_id pfuze100_ids[] = {
81 { .compatible = "fsl,pfuze100", .data = PFUZE100, },
82 { .compatible = "fsl,pfuze200", .data = PFUZE200, },
83 { .compatible = "fsl,pfuze3000", .data = PFUZE3000, },
84 { }
85 };
86
87 U_BOOT_DRIVER(pmic_pfuze100) = {
88 .name = "pfuze100 pmic",
89 .id = UCLASS_PMIC,
90 .of_match = pfuze100_ids,
91 .bind = pfuze100_bind,
92 .ops = &pfuze100_ops,
93 };
94