Heinrich Schuchardt | cc382ff | 2021-09-12 21:11:46 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * Copyright 2021, Heinrich Schuchardt <heinrich.schuchardt@canonical.com> |
| 4 | */ |
| 5 | |
Tom Rini | abb9a04 | 2024-05-18 20:20:43 -0600 | [diff] [blame] | 6 | #include <common.h> |
Heinrich Schuchardt | cc382ff | 2021-09-12 21:11:46 +0200 | [diff] [blame] | 7 | #include <dm.h> |
| 8 | #include <errno.h> |
| 9 | #include <log.h> |
| 10 | #include <sysreset.h> |
| 11 | #include <asm/sbi.h> |
| 12 | |
| 13 | static enum sbi_srst_reset_type reset_type_map[SYSRESET_COUNT] = { |
| 14 | [SYSRESET_WARM] = SBI_SRST_RESET_TYPE_WARM_REBOOT, |
| 15 | [SYSRESET_COLD] = SBI_SRST_RESET_TYPE_COLD_REBOOT, |
| 16 | [SYSRESET_POWER] = SBI_SRST_RESET_TYPE_COLD_REBOOT, |
| 17 | [SYSRESET_POWER_OFF] = SBI_SRST_RESET_TYPE_SHUTDOWN, |
| 18 | }; |
| 19 | |
| 20 | static int sbi_sysreset_request(struct udevice *dev, enum sysreset_t type) |
| 21 | { |
| 22 | enum sbi_srst_reset_type reset_type; |
| 23 | |
| 24 | reset_type = reset_type_map[type]; |
| 25 | sbi_srst_reset(reset_type, SBI_SRST_RESET_REASON_NONE); |
| 26 | |
| 27 | return -EINPROGRESS; |
| 28 | } |
| 29 | |
| 30 | static int sbi_sysreset_probe(struct udevice *dev) |
| 31 | { |
| 32 | long have_reset; |
| 33 | |
| 34 | have_reset = sbi_probe_extension(SBI_EXT_SRST); |
| 35 | if (have_reset) |
| 36 | return 0; |
| 37 | |
| 38 | log_warning("SBI has no system reset extension\n"); |
| 39 | return -ENOENT; |
| 40 | } |
| 41 | |
| 42 | static struct sysreset_ops sbi_sysreset_ops = { |
| 43 | .request = sbi_sysreset_request, |
| 44 | }; |
| 45 | |
| 46 | U_BOOT_DRIVER(sbi_sysreset) = { |
| 47 | .name = "sbi-sysreset", |
| 48 | .id = UCLASS_SYSRESET, |
| 49 | .ops = &sbi_sysreset_ops, |
| 50 | .probe = sbi_sysreset_probe, |
| 51 | }; |