1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2016, NVIDIA CORPORATION.
4 */
5
6 #include <common.h>
7 #include <dm.h>
8 #include <log.h>
9 #include <malloc.h>
10 #include <misc.h>
11 #include <reset-uclass.h>
12 #include <asm/arch-tegra/bpmp_abi.h>
13
tegra186_reset_request(struct reset_ctl * reset_ctl)14 static int tegra186_reset_request(struct reset_ctl *reset_ctl)
15 {
16 debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
17 reset_ctl->dev, reset_ctl->id);
18
19 return 0;
20 }
21
tegra186_reset_free(struct reset_ctl * reset_ctl)22 static int tegra186_reset_free(struct reset_ctl *reset_ctl)
23 {
24 debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
25 reset_ctl->dev, reset_ctl->id);
26
27 return 0;
28 }
29
tegra186_reset_common(struct reset_ctl * reset_ctl,enum mrq_reset_commands cmd)30 static int tegra186_reset_common(struct reset_ctl *reset_ctl,
31 enum mrq_reset_commands cmd)
32 {
33 struct mrq_reset_request req;
34 int ret;
35
36 req.cmd = cmd;
37 req.reset_id = reset_ctl->id;
38
39 ret = misc_call(reset_ctl->dev->parent, MRQ_RESET, &req, sizeof(req),
40 NULL, 0);
41 if (ret < 0)
42 return ret;
43
44 return 0;
45 }
46
tegra186_reset_assert(struct reset_ctl * reset_ctl)47 static int tegra186_reset_assert(struct reset_ctl *reset_ctl)
48 {
49 debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
50 reset_ctl->dev, reset_ctl->id);
51
52 return tegra186_reset_common(reset_ctl, CMD_RESET_ASSERT);
53 }
54
tegra186_reset_deassert(struct reset_ctl * reset_ctl)55 static int tegra186_reset_deassert(struct reset_ctl *reset_ctl)
56 {
57 debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
58 reset_ctl->dev, reset_ctl->id);
59
60 return tegra186_reset_common(reset_ctl, CMD_RESET_DEASSERT);
61 }
62
63 struct reset_ops tegra186_reset_ops = {
64 .request = tegra186_reset_request,
65 .rfree = tegra186_reset_free,
66 .rst_assert = tegra186_reset_assert,
67 .rst_deassert = tegra186_reset_deassert,
68 };
69
tegra186_reset_probe(struct udevice * dev)70 static int tegra186_reset_probe(struct udevice *dev)
71 {
72 debug("%s(dev=%p)\n", __func__, dev);
73
74 return 0;
75 }
76
77 U_BOOT_DRIVER(tegra186_reset) = {
78 .name = "tegra186_reset",
79 .id = UCLASS_RESET,
80 .probe = tegra186_reset_probe,
81 .ops = &tegra186_reset_ops,
82 };
83