1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2017 Masahiro Yamada <yamada.masahiro@socionext.com>
4 */
5
6 #include <dm.h>
7 #include <sysreset.h>
8 #include <linux/errno.h>
9 #include <linux/psci.h>
10
psci_sysreset_get_status(struct udevice * dev,char * buf,int size)11 __weak int psci_sysreset_get_status(struct udevice *dev, char *buf, int size)
12 {
13 return -EOPNOTSUPP;
14 }
15
psci_sysreset_request(struct udevice * dev,enum sysreset_t type)16 static int psci_sysreset_request(struct udevice *dev, enum sysreset_t type)
17 {
18 switch (type) {
19 case SYSRESET_WARM:
20 case SYSRESET_COLD:
21 psci_sys_reset(type);
22 break;
23 case SYSRESET_POWER_OFF:
24 psci_sys_poweroff();
25 break;
26 default:
27 return -EPROTONOSUPPORT;
28 }
29
30 return -EINPROGRESS;
31 }
32
33 static struct sysreset_ops psci_sysreset_ops = {
34 .request = psci_sysreset_request,
35 .get_status = psci_sysreset_get_status,
36 };
37
38 U_BOOT_DRIVER(psci_sysreset) = {
39 .name = "psci-sysreset",
40 .id = UCLASS_SYSRESET,
41 .ops = &psci_sysreset_ops,
42 .flags = DM_FLAG_PRE_RELOC,
43 };
44