]>
Commit | Line | Data |
---|---|---|
4581b717 SW |
1 | /* |
2 | * Copyright (c) 2016, NVIDIA CORPORATION. | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0 | |
5 | */ | |
6 | ||
7 | #include <common.h> | |
8 | #include <dm.h> | |
9 | #include <reset-uclass.h> | |
10 | #include <asm/io.h> | |
11 | #include <asm/reset.h> | |
12 | ||
13 | #define SANDBOX_RESET_SIGNALS 3 | |
14 | ||
15 | struct sandbox_reset_signal { | |
16 | bool asserted; | |
17 | }; | |
18 | ||
19 | struct sandbox_reset { | |
20 | struct sandbox_reset_signal signals[SANDBOX_RESET_SIGNALS]; | |
21 | }; | |
22 | ||
23 | static int sandbox_reset_request(struct reset_ctl *reset_ctl) | |
24 | { | |
25 | debug("%s(reset_ctl=%p)\n", __func__, reset_ctl); | |
26 | ||
27 | if (reset_ctl->id >= SANDBOX_RESET_SIGNALS) | |
28 | return -EINVAL; | |
29 | ||
30 | return 0; | |
31 | } | |
32 | ||
33 | static int sandbox_reset_free(struct reset_ctl *reset_ctl) | |
34 | { | |
35 | debug("%s(reset_ctl=%p)\n", __func__, reset_ctl); | |
36 | ||
37 | return 0; | |
38 | } | |
39 | ||
40 | static int sandbox_reset_assert(struct reset_ctl *reset_ctl) | |
41 | { | |
42 | struct sandbox_reset *sbr = dev_get_priv(reset_ctl->dev); | |
43 | ||
44 | debug("%s(reset_ctl=%p)\n", __func__, reset_ctl); | |
45 | ||
46 | sbr->signals[reset_ctl->id].asserted = true; | |
47 | ||
48 | return 0; | |
49 | } | |
50 | ||
51 | static int sandbox_reset_deassert(struct reset_ctl *reset_ctl) | |
52 | { | |
53 | struct sandbox_reset *sbr = dev_get_priv(reset_ctl->dev); | |
54 | ||
55 | debug("%s(reset_ctl=%p)\n", __func__, reset_ctl); | |
56 | ||
57 | sbr->signals[reset_ctl->id].asserted = false; | |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
62 | static int sandbox_reset_bind(struct udevice *dev) | |
63 | { | |
64 | debug("%s(dev=%p)\n", __func__, dev); | |
65 | ||
66 | return 0; | |
67 | } | |
68 | ||
69 | static int sandbox_reset_probe(struct udevice *dev) | |
70 | { | |
71 | debug("%s(dev=%p)\n", __func__, dev); | |
72 | ||
73 | return 0; | |
74 | } | |
75 | ||
76 | static const struct udevice_id sandbox_reset_ids[] = { | |
77 | { .compatible = "sandbox,reset-ctl" }, | |
78 | { } | |
79 | }; | |
80 | ||
81 | struct reset_ops sandbox_reset_reset_ops = { | |
82 | .request = sandbox_reset_request, | |
83 | .free = sandbox_reset_free, | |
84 | .rst_assert = sandbox_reset_assert, | |
85 | .rst_deassert = sandbox_reset_deassert, | |
86 | }; | |
87 | ||
88 | U_BOOT_DRIVER(sandbox_reset) = { | |
89 | .name = "sandbox_reset", | |
90 | .id = UCLASS_RESET, | |
91 | .of_match = sandbox_reset_ids, | |
92 | .bind = sandbox_reset_bind, | |
93 | .probe = sandbox_reset_probe, | |
94 | .priv_auto_alloc_size = sizeof(struct sandbox_reset), | |
95 | .ops = &sandbox_reset_reset_ops, | |
96 | }; | |
97 | ||
98 | int sandbox_reset_query(struct udevice *dev, unsigned long id) | |
99 | { | |
100 | struct sandbox_reset *sbr = dev_get_priv(dev); | |
101 | ||
102 | debug("%s(dev=%p, id=%ld)\n", __func__, dev, id); | |
103 | ||
104 | if (id >= SANDBOX_RESET_SIGNALS) | |
105 | return -EINVAL; | |
106 | ||
107 | return sbr->signals[id].asserted; | |
108 | } |