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 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 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 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 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 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 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
