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