diff options
| author | Heinrich Schuchardt <heinrich.schuchardt@canonical.com> | 2021-09-12 22:11:46 +0300 |
|---|---|---|
| committer | minda.chen <minda.chen@starfivetech.com> | 2023-02-02 14:11:45 +0300 |
| commit | b680cc70dc337d85e2931e6d65177b19729dc01a (patch) | |
| tree | 7c3f324d4187535b3d4b290a4e56a0c5cbc3492c /drivers | |
| parent | c9051a2bda68125f9c182a99f0274fc2f3b4ed32 (diff) | |
| download | u-boot-b680cc70dc337d85e2931e6d65177b19729dc01a.tar.xz | |
sysreset: provide SBI based sysreset driver
Provide sysreset driver using the SBI system reset extension.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Samuel Holland <samuel@sholland.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/sysreset/Kconfig | 12 | ||||
| -rw-r--r-- | drivers/sysreset/Makefile | 1 | ||||
| -rw-r--r-- | drivers/sysreset/sysreset_sbi.c | 51 |
3 files changed, 64 insertions, 0 deletions
diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig index ac77ffbc8b..43a948cfcd 100644 --- a/drivers/sysreset/Kconfig +++ b/drivers/sysreset/Kconfig @@ -85,6 +85,18 @@ config SYSRESET_PSCI Enable PSCI SYSTEM_RESET function call. To use this, PSCI firmware must be running on your system. +config SYSRESET_SBI + bool "Enable support for SBI System Reset" + depends on RISCV_SMODE && SBI_V02 + select SYSRESET_CMD_POWEROFF if CMD_POWEROFF + help + Enable system reset and poweroff via the SBI system reset extension. + The extension was introduced in version 0.3 of the SBI specification. + + If the SBI implementation provides the extension, is board specific. + The RISC-V platform specification mandates the extension for rich + operating system platforms. + config SYSRESET_SOCFPGA bool "Enable support for Intel SOCFPGA family" depends on ARCH_SOCFPGA && (TARGET_SOCFPGA_GEN5 || TARGET_SOCFPGA_ARRIA10) diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile index de81c399d7..8e00be0779 100644 --- a/drivers/sysreset/Makefile +++ b/drivers/sysreset/Makefile @@ -13,6 +13,7 @@ obj-$(CONFIG_SYSRESET_MPC83XX) += sysreset_mpc83xx.o obj-$(CONFIG_SYSRESET_MICROBLAZE) += sysreset_microblaze.o obj-$(CONFIG_SYSRESET_OCTEON) += sysreset_octeon.o obj-$(CONFIG_SYSRESET_PSCI) += sysreset_psci.o +obj-$(CONFIG_SYSRESET_SBI) += sysreset_sbi.o obj-$(CONFIG_SYSRESET_SOCFPGA) += sysreset_socfpga.o obj-$(CONFIG_SYSRESET_SOCFPGA_SOC64) += sysreset_socfpga_soc64.o obj-$(CONFIG_SYSRESET_TI_SCI) += sysreset-ti-sci.o diff --git a/drivers/sysreset/sysreset_sbi.c b/drivers/sysreset/sysreset_sbi.c new file mode 100644 index 0000000000..5e8090d62b --- /dev/null +++ b/drivers/sysreset/sysreset_sbi.c @@ -0,0 +1,51 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2021, Heinrich Schuchardt <heinrich.schuchardt@canonical.com> + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <log.h> +#include <sysreset.h> +#include <asm/sbi.h> + +static enum sbi_srst_reset_type reset_type_map[SYSRESET_COUNT] = { + [SYSRESET_WARM] = SBI_SRST_RESET_TYPE_WARM_REBOOT, + [SYSRESET_COLD] = SBI_SRST_RESET_TYPE_COLD_REBOOT, + [SYSRESET_POWER] = SBI_SRST_RESET_TYPE_COLD_REBOOT, + [SYSRESET_POWER_OFF] = SBI_SRST_RESET_TYPE_SHUTDOWN, +}; + +static int sbi_sysreset_request(struct udevice *dev, enum sysreset_t type) +{ + enum sbi_srst_reset_type reset_type; + + reset_type = reset_type_map[type]; + sbi_srst_reset(reset_type, SBI_SRST_RESET_REASON_NONE); + + return -EINPROGRESS; +} + +static int sbi_sysreset_probe(struct udevice *dev) +{ + long have_reset; + + have_reset = sbi_probe_extension(SBI_EXT_SRST); + if (have_reset) + return 0; + + log_warning("SBI has no system reset extension\n"); + return -ENOENT; +} + +static struct sysreset_ops sbi_sysreset_ops = { + .request = sbi_sysreset_request, +}; + +U_BOOT_DRIVER(sbi_sysreset) = { + .name = "sbi-sysreset", + .id = UCLASS_SYSRESET, + .ops = &sbi_sysreset_ops, + .probe = sbi_sysreset_probe, +}; |