1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2016, NVIDIA CORPORATION.
4 */
5
6 #include <dm.h>
7 #include <log.h>
8 #include <malloc.h>
9 #include <misc.h>
10 #include <reset-uclass.h>
11 #include <asm/arch-tegra/bpmp_abi.h>
12
tegra186_reset_common(struct reset_ctl * reset_ctl,enum mrq_reset_commands cmd)13 static int tegra186_reset_common(struct reset_ctl *reset_ctl,
14 enum mrq_reset_commands cmd)
15 {
16 struct mrq_reset_request req;
17 int ret;
18
19 req.cmd = cmd;
20 req.reset_id = reset_ctl->id;
21
22 ret = misc_call(reset_ctl->dev->parent, MRQ_RESET, &req, sizeof(req),
23 NULL, 0);
24 if (ret < 0)
25 return ret;
26
27 return 0;
28 }
29
tegra186_reset_assert(struct reset_ctl * reset_ctl)30 static int tegra186_reset_assert(struct reset_ctl *reset_ctl)
31 {
32 debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
33 reset_ctl->dev, reset_ctl->id);
34
35 return tegra186_reset_common(reset_ctl, CMD_RESET_ASSERT);
36 }
37
tegra186_reset_deassert(struct reset_ctl * reset_ctl)38 static int tegra186_reset_deassert(struct reset_ctl *reset_ctl)
39 {
40 debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
41 reset_ctl->dev, reset_ctl->id);
42
43 return tegra186_reset_common(reset_ctl, CMD_RESET_DEASSERT);
44 }
45
46 struct reset_ops tegra186_reset_ops = {
47 .rst_assert = tegra186_reset_assert,
48 .rst_deassert = tegra186_reset_deassert,
49 };
50
51 U_BOOT_DRIVER(tegra186_reset) = {
52 .name = "tegra186_reset",
53 .id = UCLASS_RESET,
54 .ops = &tegra186_reset_ops,
55 };
56