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d308c013 SG |
1 | /* |
2 | * Copyright (C) 2015 Google, Inc | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0+ | |
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/s5m8767.h> | |
15 | ||
16 | DECLARE_GLOBAL_DATA_PTR; | |
17 | ||
18 | static const struct pmic_child_info pmic_children_info[] = { | |
19 | { .prefix = "LDO", .driver = S5M8767_LDO_DRIVER }, | |
20 | { .prefix = "BUCK", .driver = S5M8767_BUCK_DRIVER }, | |
21 | { }, | |
22 | }; | |
23 | ||
24 | static int s5m8767_reg_count(struct udevice *dev) | |
25 | { | |
26 | return S5M8767_NUM_OF_REGS; | |
27 | } | |
28 | ||
29 | static int s5m8767_write(struct udevice *dev, uint reg, const uint8_t *buff, | |
30 | int len) | |
31 | { | |
32 | if (dm_i2c_write(dev, reg, buff, len)) { | |
9b643e31 | 33 | pr_err("write error to device: %p register: %#x!", dev, reg); |
d308c013 SG |
34 | return -EIO; |
35 | } | |
36 | ||
37 | return 0; | |
38 | } | |
39 | ||
40 | static int s5m8767_read(struct udevice *dev, uint reg, uint8_t *buff, int len) | |
41 | { | |
42 | if (dm_i2c_read(dev, reg, buff, len)) { | |
9b643e31 | 43 | pr_err("read error from device: %p register: %#x!", dev, reg); |
d308c013 SG |
44 | return -EIO; |
45 | } | |
46 | ||
47 | return 0; | |
48 | } | |
49 | ||
50 | int s5m8767_enable_32khz_cp(struct udevice *dev) | |
51 | { | |
52 | return pmic_clrsetbits(dev, S5M8767_EN32KHZ_CP, 0, 1 << 1); | |
53 | } | |
54 | ||
55 | static int s5m8767_bind(struct udevice *dev) | |
56 | { | |
d308c013 | 57 | int children; |
7a869e6c | 58 | ofnode node; |
d308c013 | 59 | |
7a869e6c SG |
60 | node = dev_read_subnode(dev, "regulators"); |
61 | if (!ofnode_valid(node)) { | |
d308c013 SG |
62 | debug("%s: %s regulators subnode not found!", __func__, |
63 | dev->name); | |
64 | return -ENXIO; | |
65 | } | |
66 | ||
67 | debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); | |
68 | ||
69 | children = pmic_bind_children(dev, node, pmic_children_info); | |
70 | if (!children) | |
71 | debug("%s: %s - no child found\n", __func__, dev->name); | |
72 | ||
73 | /* Always return success for this device */ | |
74 | return 0; | |
75 | } | |
76 | ||
77 | static struct dm_pmic_ops s5m8767_ops = { | |
78 | .reg_count = s5m8767_reg_count, | |
79 | .read = s5m8767_read, | |
80 | .write = s5m8767_write, | |
81 | }; | |
82 | ||
83 | static const struct udevice_id s5m8767_ids[] = { | |
84 | { .compatible = "samsung,s5m8767-pmic" }, | |
85 | { } | |
86 | }; | |
87 | ||
88 | U_BOOT_DRIVER(pmic_s5m8767) = { | |
89 | .name = "s5m8767_pmic", | |
90 | .id = UCLASS_PMIC, | |
91 | .of_match = s5m8767_ids, | |
92 | .bind = s5m8767_bind, | |
93 | .ops = &s5m8767_ops, | |
94 | }; |