1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2016 NVIDIA Corporation
6 #include <linux/reset-controller.h>
8 #include <soc/tegra/bpmp.h>
9 #include <soc/tegra/bpmp-abi.h>
11 static struct tegra_bpmp *to_tegra_bpmp(struct reset_controller_dev *rstc)
13 return container_of(rstc, struct tegra_bpmp, rstc);
16 static int tegra_bpmp_reset_common(struct reset_controller_dev *rstc,
17 enum mrq_reset_commands command,
20 struct tegra_bpmp *bpmp = to_tegra_bpmp(rstc);
21 struct mrq_reset_request request;
22 struct tegra_bpmp_message msg;
25 memset(&request, 0, sizeof(request));
26 request.cmd = command;
27 request.reset_id = id;
29 memset(&msg, 0, sizeof(msg));
31 msg.tx.data = &request;
32 msg.tx.size = sizeof(request);
34 err = tegra_bpmp_transfer(bpmp, &msg);
43 static int tegra_bpmp_reset_module(struct reset_controller_dev *rstc,
46 return tegra_bpmp_reset_common(rstc, CMD_RESET_MODULE, id);
49 static int tegra_bpmp_reset_assert(struct reset_controller_dev *rstc,
52 return tegra_bpmp_reset_common(rstc, CMD_RESET_ASSERT, id);
55 static int tegra_bpmp_reset_deassert(struct reset_controller_dev *rstc,
58 return tegra_bpmp_reset_common(rstc, CMD_RESET_DEASSERT, id);
61 static const struct reset_control_ops tegra_bpmp_reset_ops = {
62 .reset = tegra_bpmp_reset_module,
63 .assert = tegra_bpmp_reset_assert,
64 .deassert = tegra_bpmp_reset_deassert,
67 int tegra_bpmp_init_resets(struct tegra_bpmp *bpmp)
69 bpmp->rstc.ops = &tegra_bpmp_reset_ops;
70 bpmp->rstc.owner = THIS_MODULE;
71 bpmp->rstc.of_node = bpmp->dev->of_node;
72 bpmp->rstc.nr_resets = bpmp->soc->num_resets;
74 return devm_reset_controller_register(bpmp->dev, &bpmp->rstc);