1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright(C) 2023 Svyatoslav Ryhel <clamor95@gmail.com>
4  */
5 
6 #include <dm.h>
7 #include <errno.h>
8 #include <sysreset.h>
9 #include <linux/err.h>
10 #include <asm/arch-tegra/pmc.h>
11 
tegra_sysreset_request(struct udevice * dev,enum sysreset_t type)12 static int tegra_sysreset_request(struct udevice *dev,
13 				  enum sysreset_t type)
14 {
15 	u32 value;
16 
17 	switch (type) {
18 	case SYSRESET_WARM:
19 	case SYSRESET_COLD:
20 		/* resets everything but scratch 0 and reset status */
21 		value = tegra_pmc_readl(PMC_CNTRL);
22 		value |= PMC_CNTRL_MAIN_RST;
23 		tegra_pmc_writel(value, PMC_CNTRL);
24 		break;
25 	default:
26 		return -EPROTONOSUPPORT;
27 	}
28 
29 	return -EINPROGRESS;
30 }
31 
32 static struct sysreset_ops tegra_sysreset = {
33 	.request = tegra_sysreset_request,
34 };
35 
36 U_BOOT_DRIVER(sysreset_tegra) = {
37 	.id	= UCLASS_SYSRESET,
38 	.name	= "sysreset_tegra",
39 	.ops	= &tegra_sysreset,
40 };
41 
42 /* Link to Tegra PMC once there is a driver */
43 U_BOOT_DRVINFO(sysreset_tegra) = {
44 	.name = "sysreset_tegra"
45 };
46