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Przemyslaw Marczak52a3de52015-04-20 20:07:46 +02001/*
2 * Copyright (C) 2014-2015 Samsung Electronics
3 * Przemyslaw Marczak <p.marczak@samsung.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/max77686_pmic.h>
16
17DECLARE_GLOBAL_DATA_PTR;
18
Przemyslaw Marczakf415a3e2015-05-13 13:38:26 +020019static const struct pmic_child_info pmic_children_info[] = {
Simon Glassb5ffa4f2015-07-02 18:16:02 -060020 { .prefix = "LDO", .driver = MAX77686_LDO_DRIVER },
21 { .prefix = "BUCK", .driver = MAX77686_BUCK_DRIVER },
Przemyslaw Marczak52a3de52015-04-20 20:07:46 +020022 { },
23};
24
Przemyslaw Marczakf415a3e2015-05-13 13:38:26 +020025static int max77686_reg_count(struct udevice *dev)
26{
27 return MAX77686_NUM_OF_REGS;
28}
29
Przemyslaw Marczak52a3de52015-04-20 20:07:46 +020030static int max77686_write(struct udevice *dev, uint reg, const uint8_t *buff,
31 int len)
32{
33 if (dm_i2c_write(dev, reg, buff, len)) {
Masahiro Yamada9b643e32017-09-16 14:10:41 +090034 pr_err("write error to device: %p register: %#x!", dev, reg);
Przemyslaw Marczak52a3de52015-04-20 20:07:46 +020035 return -EIO;
36 }
37
38 return 0;
39}
40
41static int max77686_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
42{
43 if (dm_i2c_read(dev, reg, buff, len)) {
Masahiro Yamada9b643e32017-09-16 14:10:41 +090044 pr_err("read error from device: %p register: %#x!", dev, reg);
Przemyslaw Marczak52a3de52015-04-20 20:07:46 +020045 return -EIO;
46 }
47
48 return 0;
49}
50
51static int max77686_bind(struct udevice *dev)
52{
Simon Glass7a869e62017-05-18 20:09:32 -060053 ofnode regulators_node;
Przemyslaw Marczakf415a3e2015-05-13 13:38:26 +020054 int children;
Przemyslaw Marczak52a3de52015-04-20 20:07:46 +020055
Simon Glass7a869e62017-05-18 20:09:32 -060056 regulators_node = dev_read_subnode(dev, "voltage-regulators");
57 if (!ofnode_valid(regulators_node)) {
Przemyslaw Marczak52a3de52015-04-20 20:07:46 +020058 debug("%s: %s regulators subnode not found!", __func__,
59 dev->name);
60 return -ENXIO;
61 }
62
63 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
64
Przemyslaw Marczakf415a3e2015-05-13 13:38:26 +020065 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
66 if (!children)
Przemyslaw Marczak52a3de52015-04-20 20:07:46 +020067 debug("%s: %s - no child found\n", __func__, dev->name);
68
69 /* Always return success for this device */
70 return 0;
71}
72
73static struct dm_pmic_ops max77686_ops = {
Przemyslaw Marczakf415a3e2015-05-13 13:38:26 +020074 .reg_count = max77686_reg_count,
Przemyslaw Marczak52a3de52015-04-20 20:07:46 +020075 .read = max77686_read,
76 .write = max77686_write,
77};
78
79static const struct udevice_id max77686_ids[] = {
80 { .compatible = "maxim,max77686" },
81 { }
82};
83
84U_BOOT_DRIVER(pmic_max77686) = {
Simon Glassb5ffa4f2015-07-02 18:16:02 -060085 .name = "max77686_pmic",
Przemyslaw Marczak52a3de52015-04-20 20:07:46 +020086 .id = UCLASS_PMIC,
87 .of_match = max77686_ids,
88 .bind = max77686_bind,
89 .ops = &max77686_ops,
90};