tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2016 NVIDIA Corporation
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9#include <linux/reset-controller.h>
10
11#include <soc/tegra/bpmp.h>
12#include <soc/tegra/bpmp-abi.h>
13
14static struct tegra_bpmp *to_tegra_bpmp(struct reset_controller_dev *rstc)
15{
16 return container_of(rstc, struct tegra_bpmp, rstc);
17}
18
19static int tegra_bpmp_reset_common(struct reset_controller_dev *rstc,
20 enum mrq_reset_commands command,
21 unsigned int id)
22{
23 struct tegra_bpmp *bpmp = to_tegra_bpmp(rstc);
24 struct mrq_reset_request request;
25 struct tegra_bpmp_message msg;
26
27 memset(&request, 0, sizeof(request));
28 request.cmd = command;
29 request.reset_id = id;
30
31 memset(&msg, 0, sizeof(msg));
32 msg.mrq = MRQ_RESET;
33 msg.tx.data = &request;
34 msg.tx.size = sizeof(request);
35
36 return tegra_bpmp_transfer(bpmp, &msg);
37}
38
39static int tegra_bpmp_reset_module(struct reset_controller_dev *rstc,
40 unsigned long id)
41{
42 return tegra_bpmp_reset_common(rstc, CMD_RESET_MODULE, id);
43}
44
45static int tegra_bpmp_reset_assert(struct reset_controller_dev *rstc,
46 unsigned long id)
47{
48 return tegra_bpmp_reset_common(rstc, CMD_RESET_ASSERT, id);
49}
50
51static int tegra_bpmp_reset_deassert(struct reset_controller_dev *rstc,
52 unsigned long id)
53{
54 return tegra_bpmp_reset_common(rstc, CMD_RESET_DEASSERT, id);
55}
56
57static const struct reset_control_ops tegra_bpmp_reset_ops = {
58 .reset = tegra_bpmp_reset_module,
59 .assert = tegra_bpmp_reset_assert,
60 .deassert = tegra_bpmp_reset_deassert,
61};
62
63int tegra_bpmp_init_resets(struct tegra_bpmp *bpmp)
64{
65 bpmp->rstc.ops = &tegra_bpmp_reset_ops;
66 bpmp->rstc.owner = THIS_MODULE;
67 bpmp->rstc.of_node = bpmp->dev->of_node;
68 bpmp->rstc.nr_resets = bpmp->soc->num_resets;
69
70 return devm_reset_controller_register(bpmp->dev, &bpmp->rstc);
71}