| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (c) 2016, NVIDIA CORPORATION. |
| */ |
| |
| #include <common.h> |
| #include <dm.h> |
| #include <reset-uclass.h> |
| #include <asm/arch/clock.h> |
| #include <asm/arch-tegra/clk_rst.h> |
| |
| static int tegra_car_reset_request(struct reset_ctl *reset_ctl) |
| { |
| debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl, |
| reset_ctl->dev, reset_ctl->id); |
| |
| /* PERIPH_ID_COUNT varies per SoC */ |
| if (reset_ctl->id >= PERIPH_ID_COUNT) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static int tegra_car_reset_free(struct reset_ctl *reset_ctl) |
| { |
| debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl, |
| reset_ctl->dev, reset_ctl->id); |
| |
| return 0; |
| } |
| |
| static int tegra_car_reset_assert(struct reset_ctl *reset_ctl) |
| { |
| debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl, |
| reset_ctl->dev, reset_ctl->id); |
| |
| reset_set_enable(reset_ctl->id, 1); |
| |
| return 0; |
| } |
| |
| static int tegra_car_reset_deassert(struct reset_ctl *reset_ctl) |
| { |
| debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl, |
| reset_ctl->dev, reset_ctl->id); |
| |
| reset_set_enable(reset_ctl->id, 0); |
| |
| return 0; |
| } |
| |
| struct reset_ops tegra_car_reset_ops = { |
| .request = tegra_car_reset_request, |
| .free = tegra_car_reset_free, |
| .rst_assert = tegra_car_reset_assert, |
| .rst_deassert = tegra_car_reset_deassert, |
| }; |
| |
| static int tegra_car_reset_probe(struct udevice *dev) |
| { |
| debug("%s(dev=%p)\n", __func__, dev); |
| |
| return 0; |
| } |
| |
| U_BOOT_DRIVER(tegra_car_reset) = { |
| .name = "tegra_car_reset", |
| .id = UCLASS_RESET, |
| .probe = tegra_car_reset_probe, |
| .ops = &tegra_car_reset_ops, |
| }; |