1 /* 2 * Copyright (C) 2017 Masahiro Yamada <yamada.masahiro@socionext.com> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <dm.h> 9 #include <sysreset.h> 10 #include <linux/errno.h> 11 #include <linux/psci.h> 12 psci_sysreset_request(struct udevice * dev,enum sysreset_t type)13static int psci_sysreset_request(struct udevice *dev, enum sysreset_t type) 14 { 15 unsigned long function_id; 16 17 switch (type) { 18 case SYSRESET_WARM: 19 case SYSRESET_COLD: 20 function_id = PSCI_0_2_FN_SYSTEM_RESET; 21 break; 22 case SYSRESET_POWER: 23 function_id = PSCI_0_2_FN_SYSTEM_OFF; 24 break; 25 default: 26 return -ENOSYS; 27 } 28 29 invoke_psci_fn(function_id, 0, 0, 0); 30 31 return -EINPROGRESS; 32 } 33 34 static struct sysreset_ops psci_sysreset_ops = { 35 .request = psci_sysreset_request, 36 }; 37 38 /* Add an 'a_' prefix so it comes the first sysreset path. */ 39 U_BOOT_DRIVER(a_psci_sysreset) = { 40 .name = "psci-sysreset", 41 .id = UCLASS_SYSRESET, 42 .ops = &psci_sysreset_ops, 43 }; 44