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-rw-r--r--target/linux/sifiveu/Makefile23
-rw-r--r--target/linux/sifiveu/base-files/etc/board.d/01_leds21
-rw-r--r--target/linux/sifiveu/base-files/etc/board.d/02_network18
-rw-r--r--target/linux/sifiveu/base-files/etc/inittab4
-rw-r--r--target/linux/sifiveu/base-files/lib/preinit/79_move_config19
-rw-r--r--target/linux/sifiveu/base-files/lib/upgrade/platform.sh86
-rw-r--r--target/linux/sifiveu/config-5.15363
-rw-r--r--target/linux/sifiveu/generic/target.mk1
-rw-r--r--target/linux/sifiveu/image/Config.in5
-rw-r--r--target/linux/sifiveu/image/Makefile56
-rwxr-xr-xtarget/linux/sifiveu/image/gen_sifiveu_sdcard_img.sh28
-rw-r--r--target/linux/sifiveu/patches-5.15/0001-riscv-sifive-fu740-cpu-1-2-3-4-set-compatible-to-sif.patch49
-rw-r--r--target/linux/sifiveu/patches-5.15/0002-riscv-sifive-unmatched-update-regulators-values.patch104
-rw-r--r--target/linux/sifiveu/patches-5.15/0003-riscv-sifive-unmatched-define-PWM-LEDs.patch69
-rw-r--r--target/linux/sifiveu/patches-5.15/0004-riscv-sifive-unmatched-add-gpio-poweroff-node.patch26
-rw-r--r--target/linux/sifiveu/patches-5.15/0005-riscv-sifive-unleashed-define-opp-table-cpufreq.patch116
-rw-r--r--target/linux/sifiveu/patches-5.15/0006-riscv-sbi-srst-support.patch301
17 files changed, 1289 insertions, 0 deletions
diff --git a/target/linux/sifiveu/Makefile b/target/linux/sifiveu/Makefile
new file mode 100644
index 0000000000..f88164e7af
--- /dev/null
+++ b/target/linux/sifiveu/Makefile
@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Copyright (C) 2022 Toco Technologies <info@toco.ae>
+#
+include $(TOPDIR)/rules.mk
+
+ARCH:=riscv64
+BOARD:=sifiveu
+BOARDNAME:=SiFive U-based RISC-V boards
+FEATURES:=ext4
+KERNELNAME:=Image dtbs
+SUBTARGETS:=generic
+
+KERNEL_PATCHVER:=5.15
+
+include $(INCLUDE_DIR)/target.mk
+
+define Target/Description
+ Build firmware images for the SiFive U-based boards
+ (HiFive boards)
+endef
+
+$(eval $(call BuildTarget))
diff --git a/target/linux/sifiveu/base-files/etc/board.d/01_leds b/target/linux/sifiveu/base-files/etc/board.d/01_leds
new file mode 100644
index 0000000000..5610a791ec
--- /dev/null
+++ b/target/linux/sifiveu/base-files/etc/board.d/01_leds
@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Copyright (C) 2022 OpenWrt.org
+#
+
+. /lib/functions/uci-defaults.sh
+
+board_config_update
+
+case "$(board_name)" in
+sifive,hifive-unleashed-a00)
+ ucidef_set_led_netdev "lan" "LAN" "green:d3" "eth0"
+ ;;
+sifive,hifive-unmatched-a00)
+ ucidef_set_led_netdev "lan" "LAN" "green:d2" "eth0"
+ ;;
+esac
+
+board_config_flush
+
+exit 0
diff --git a/target/linux/sifiveu/base-files/etc/board.d/02_network b/target/linux/sifiveu/base-files/etc/board.d/02_network
new file mode 100644
index 0000000000..ca9f7f2008
--- /dev/null
+++ b/target/linux/sifiveu/base-files/etc/board.d/02_network
@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Copyright (C) 2022 OpenWrt.org
+#
+
+. /lib/functions/uci-defaults.sh
+
+board_config_update
+
+case "$(board_name)" in
+*)
+ ucidef_set_interface_lan 'eth0'
+ ;;
+esac
+
+board_config_flush
+
+exit 0
diff --git a/target/linux/sifiveu/base-files/etc/inittab b/target/linux/sifiveu/base-files/etc/inittab
new file mode 100644
index 0000000000..69f97c47c8
--- /dev/null
+++ b/target/linux/sifiveu/base-files/etc/inittab
@@ -0,0 +1,4 @@
+::sysinit:/etc/init.d/rcS S boot
+::shutdown:/etc/init.d/rcS K shutdown
+ttySIF0::askfirst:/usr/libexec/login.sh
+tty1::askfirst:/usr/libexec/login.sh
diff --git a/target/linux/sifiveu/base-files/lib/preinit/79_move_config b/target/linux/sifiveu/base-files/lib/preinit/79_move_config
new file mode 100644
index 0000000000..2796c4d01b
--- /dev/null
+++ b/target/linux/sifiveu/base-files/lib/preinit/79_move_config
@@ -0,0 +1,19 @@
+# Copyright (C) 2012-2015 OpenWrt.org
+
+move_config() {
+ local partdev
+
+ . /lib/upgrade/common.sh
+
+ if export_bootdevice && export_partdevice partdev 3; then
+ if mount -t vfat -o rw,noatime "/dev/$partdev" /mnt; then
+ if [ -f "/mnt/$BACKUP_FILE" ]; then
+ mv -f "/mnt/$BACKUP_FILE" /
+ fi
+ umount /mnt
+ fi
+ fi
+}
+
+boot_hook_add preinit_mount_root move_config
+
diff --git a/target/linux/sifiveu/base-files/lib/upgrade/platform.sh b/target/linux/sifiveu/base-files/lib/upgrade/platform.sh
new file mode 100644
index 0000000000..b5f6bada41
--- /dev/null
+++ b/target/linux/sifiveu/base-files/lib/upgrade/platform.sh
@@ -0,0 +1,86 @@
+platform_check_image() {
+ local diskdev partdev diff
+
+ export_bootdevice && export_partdevice diskdev 0 || {
+ echo "Unable to determine upgrade device"
+ return 1
+ }
+
+ get_partitions "/dev/$diskdev" bootdisk
+
+ #extract the boot sector from the image
+ get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b 2>/dev/null
+
+ get_partitions /tmp/image.bs image
+
+ #compare tables
+ diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
+
+ rm -f /tmp/image.bs /tmp/partmap.bootdisk /tmp/partmap.image
+
+ if [ -n "$diff" ]; then
+ echo "Partition layout has changed. Full image will be written."
+ ask_bool 0 "Abort" && exit 1
+ return 0
+ fi
+}
+
+platform_copy_config() {
+ local partdev
+
+ if export_partdevice partdev 3; then
+ mount -t vfat -o rw,noatime "/dev/$partdev" /mnt
+ cp -af "$UPGRADE_BACKUP" "/mnt/$BACKUP_FILE"
+ umount /mnt
+ fi
+}
+
+platform_do_upgrade() {
+ local diskdev partdev diff
+
+ export_bootdevice && export_partdevice diskdev 0 || {
+ echo "Unable to determine upgrade device"
+ return 1
+ }
+
+ sync
+
+ if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
+ get_partitions "/dev/$diskdev" bootdisk
+
+ #extract the boot sector from the image
+ get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b
+
+ get_partitions /tmp/image.bs image
+
+ #compare tables
+ diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
+ else
+ diff=1
+ fi
+
+ if [ -n "$diff" ]; then
+ get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync
+
+ # Separate removal and addtion is necessary; otherwise, partition 1
+ # will be missing if it overlaps with the old partition 2
+ partx -d - "/dev/$diskdev"
+ partx -a - "/dev/$diskdev"
+
+ return 0
+ fi
+
+ #iterate over each partition from the image and write it to the boot disk
+ while read part start size; do
+ if export_partdevice partdev $part; then
+ echo "Writing image to /dev/$partdev..."
+ get_image "$@" | dd of="/dev/$partdev" ibs="512" obs=1M skip="$start" count="$size" conv=fsync
+ else
+ echo "Unable to find partition $part device, skipped."
+ fi
+ done < /tmp/partmap.image
+
+ #copy partition uuid
+ echo "Writing new UUID to /dev/$diskdev..."
+ get_image "$@" | dd of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync
+}
diff --git a/target/linux/sifiveu/config-5.15 b/target/linux/sifiveu/config-5.15
new file mode 100644
index 0000000000..fce0f659e3
--- /dev/null
+++ b/target/linux/sifiveu/config-5.15
@@ -0,0 +1,363 @@
+CONFIG_64BIT=y
+CONFIG_ARCH_CLOCKSOURCE_INIT=y
+CONFIG_ARCH_DMA_ADDR_T_64BIT=y
+CONFIG_ARCH_MMAP_RND_BITS=18
+CONFIG_ARCH_MMAP_RND_BITS_MAX=24
+CONFIG_ARCH_MMAP_RND_BITS_MIN=18
+CONFIG_ARCH_OPTIONAL_KERNEL_RWX=y
+CONFIG_ARCH_OPTIONAL_KERNEL_RWX_DEFAULT=y
+# CONFIG_ARCH_RV32I is not set
+CONFIG_ARCH_RV64I=y
+CONFIG_ARCH_SELECT_MEMORY_MODEL=y
+CONFIG_ARCH_SPARSEMEM_ENABLE=y
+CONFIG_ARCH_STACKWALK=y
+CONFIG_ASSOCIATIVE_ARRAY=y
+CONFIG_ATA=y
+CONFIG_ATA_VERBOSE_ERROR=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_BLK_MQ_PCI=y
+CONFIG_BLK_MQ_VIRTIO=y
+CONFIG_CAVIUM_PTP=y
+CONFIG_CC_HAVE_STACKPROTECTOR_TLS=y
+CONFIG_CLK_ANALOGBITS_WRPLL_CLN28HPC=y
+CONFIG_CLK_SIFIVE=y
+CONFIG_CLK_SIFIVE_PRCI=y
+CONFIG_CLONE_BACKWARDS=y
+CONFIG_CLZ_TAB=y
+CONFIG_CMODEL_MEDANY=y
+# CONFIG_CMODEL_MEDLOW is not set
+CONFIG_COMMON_CLK=y
+# CONFIG_COMPAT_32BIT_TIME is not set
+CONFIG_COMPAT_BRK=y
+CONFIG_CONSOLE_TRANSLATIONS=y
+CONFIG_COREDUMP=y
+CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
+CONFIG_CPU_ISOLATION=y
+CONFIG_CPU_RMAP=y
+CONFIG_CRC16=y
+# CONFIG_CRC32_SARWATE is not set
+CONFIG_CRC32_SLICEBY8=y
+CONFIG_CRC7=y
+CONFIG_CRC_ITU_T=y
+CONFIG_CRYPTO_CRC32C=y
+CONFIG_CRYPTO_DRBG=y
+CONFIG_CRYPTO_DRBG_HMAC=y
+CONFIG_CRYPTO_DRBG_MENU=y
+CONFIG_CRYPTO_ECHAINIV=y
+CONFIG_CRYPTO_HASH_INFO=y
+CONFIG_CRYPTO_HMAC=y
+CONFIG_CRYPTO_JITTERENTROPY=y
+CONFIG_CRYPTO_LIB_POLY1305_RSIZE=1
+CONFIG_CRYPTO_LIB_SHA256=y
+CONFIG_CRYPTO_RNG=y
+CONFIG_CRYPTO_RNG2=y
+CONFIG_CRYPTO_RNG_DEFAULT=y
+CONFIG_CRYPTO_RSA=y
+CONFIG_CRYPTO_SHA256=y
+CONFIG_CRYPTO_SHA512=y
+CONFIG_DEBUG_BUGVERBOSE=y
+CONFIG_DECOMPRESS_GZIP=y
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+CONFIG_DNOTIFY=y
+CONFIG_DTC=y
+CONFIG_DUMMY_CONSOLE=y
+CONFIG_EDAC=y
+# CONFIG_EDAC_DEBUG is not set
+CONFIG_EDAC_LEGACY_SYSFS=y
+CONFIG_EDAC_SIFIVE=y
+CONFIG_EDAC_SUPPORT=y
+CONFIG_EFI=y
+CONFIG_EFIVAR_FS=m
+# CONFIG_EFI_BOOTLOADER_CONTROL is not set
+# CONFIG_EFI_CAPSULE_LOADER is not set
+# CONFIG_EFI_DISABLE_PCI_DMA is not set
+CONFIG_EFI_EARLYCON=y
+CONFIG_EFI_ESRT=y
+CONFIG_EFI_GENERIC_STUB=y
+CONFIG_EFI_PARAMS_FROM_FDT=y
+CONFIG_EFI_RUNTIME_WRAPPERS=y
+CONFIG_EFI_STUB=y
+# CONFIG_EFI_TEST is not set
+CONFIG_ELF_CORE=y
+CONFIG_ERRATA_SIFIVE=y
+CONFIG_ERRATA_SIFIVE_CIP_1200=y
+CONFIG_ERRATA_SIFIVE_CIP_453=y
+CONFIG_EXT4_FS=y
+CONFIG_FAILOVER=y
+CONFIG_FHANDLE=y
+CONFIG_FIXED_PHY=y
+CONFIG_FIX_EARLYCON_MEM=y
+CONFIG_FONT_8x16=y
+CONFIG_FONT_AUTOSELECT=y
+CONFIG_FONT_SUPPORT=y
+CONFIG_FPU=y
+CONFIG_FRAME_POINTER=y
+CONFIG_FRAME_WARN=2048
+CONFIG_FS_IOMAP=y
+CONFIG_FS_MBCACHE=y
+CONFIG_FWNODE_MDIO=y
+CONFIG_FW_LOADER_PAGED_BUF=y
+CONFIG_GENERIC_ALLOCATOR=y
+CONFIG_GENERIC_ARCH_TOPOLOGY=y
+CONFIG_GENERIC_BUG=y
+CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
+CONFIG_GENERIC_CLOCKEVENTS=y
+CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
+CONFIG_GENERIC_CSUM=y
+CONFIG_GENERIC_EARLY_IOREMAP=y
+CONFIG_GENERIC_GETTIMEOFDAY=y
+CONFIG_GENERIC_IDLE_POLL_SETUP=y
+CONFIG_GENERIC_IOREMAP=y
+CONFIG_GENERIC_IRQ_INJECTION=y
+CONFIG_GENERIC_IRQ_MULTI_HANDLER=y
+CONFIG_GENERIC_IRQ_SHOW=y
+CONFIG_GENERIC_IRQ_SHOW_LEVEL=y
+CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED=y
+CONFIG_GENERIC_MSI_IRQ=y
+CONFIG_GENERIC_MSI_IRQ_DOMAIN=y
+CONFIG_GENERIC_PCI_IOMAP=y
+CONFIG_GENERIC_SCHED_CLOCK=y
+CONFIG_GENERIC_SMP_IDLE_THREAD=y
+CONFIG_GENERIC_STRNCPY_FROM_USER=y
+CONFIG_GENERIC_STRNLEN_USER=y
+CONFIG_GENERIC_TIME_VSYSCALL=y
+CONFIG_GLOB=y
+CONFIG_GPIOLIB=y
+CONFIG_GPIOLIB_IRQCHIP=y
+CONFIG_GPIO_CDEV=y
+CONFIG_GPIO_CDEV_V1=y
+CONFIG_GPIO_GENERIC=y
+CONFIG_GPIO_SIFIVE=y
+CONFIG_HANDLE_DOMAIN_IRQ=y
+CONFIG_HAS_DMA=y
+CONFIG_HAS_IOMEM=y
+CONFIG_HAS_IOPORT_MAP=y
+CONFIG_HID=y
+CONFIG_HID_GENERIC=y
+CONFIG_HOTPLUG_PCI=y
+# CONFIG_HOTPLUG_PCI_CPCI is not set
+CONFIG_HOTPLUG_PCI_PCIE=y
+CONFIG_HOTPLUG_PCI_SHPC=y
+CONFIG_HVC_DRIVER=y
+CONFIG_HVC_RISCV_SBI=y
+CONFIG_HW_CONSOLE=y
+CONFIG_I2C=y
+CONFIG_I2C_BOARDINFO=y
+CONFIG_I2C_COMPAT=y
+CONFIG_I2C_HELPER_AUTO=y
+CONFIG_I2C_OCORES=y
+CONFIG_INITRAMFS_SOURCE=""
+CONFIG_INPUT=y
+# CONFIG_IOMMU_DEBUGFS is not set
+CONFIG_IOMMU_SUPPORT=y
+CONFIG_IO_URING=y
+CONFIG_IRQCHIP=y
+CONFIG_IRQ_DOMAIN=y
+CONFIG_IRQ_DOMAIN_HIERARCHY=y
+CONFIG_IRQ_FORCED_THREADING=y
+CONFIG_IRQ_WORK=y
+CONFIG_JBD2=y
+CONFIG_KALLSYMS=y
+CONFIG_KEYS=y
+CONFIG_LEDS_PWM=y
+CONFIG_LEDS_TRIGGER_DISK=y
+CONFIG_LEGACY_PTYS=y
+CONFIG_LEGACY_PTY_COUNT=256
+CONFIG_LIBFDT=y
+CONFIG_LOCALVERSION_AUTO=y
+CONFIG_LOCK_DEBUGGING_SUPPORT=y
+CONFIG_LOCK_SPIN_ON_OWNER=y
+CONFIG_MACB=y
+# CONFIG_MACB_PCI is not set
+CONFIG_MACB_USE_HWSTAMP=y
+CONFIG_MDIO_BUS=y
+CONFIG_MDIO_DEVICE=y
+CONFIG_MDIO_DEVRES=y
+CONFIG_MEMFD_CREATE=y
+CONFIG_MFD_CORE=y
+CONFIG_MFD_SYSCON=y
+CONFIG_MICROSEMI_PHY=y
+CONFIG_MIGRATION=y
+CONFIG_MMC=y
+CONFIG_MMC_BLOCK=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_CADENCE=y
+# CONFIG_MMC_SDHCI_PCI is not set
+CONFIG_MMC_SDHCI_PLTFM=y
+CONFIG_MMC_SPI=y
+CONFIG_MMIOWB=y
+CONFIG_MODULES_USE_ELF_RELA=y
+CONFIG_MODULE_SECTIONS=y
+CONFIG_MPILIB=y
+CONFIG_MQ_IOSCHED_DEADLINE=y
+CONFIG_MQ_IOSCHED_KYBER=y
+CONFIG_MTD_SPI_NOR=y
+CONFIG_MTD_SPI_NOR_USE_4K_SECTORS=y
+CONFIG_MUTEX_SPIN_ON_OWNER=y
+CONFIG_NEED_DMA_MAP_STATE=y
+CONFIG_NET_FAILOVER=y
+CONFIG_NET_FLOW_LIMIT=y
+CONFIG_NET_PTP_CLASSIFY=y
+CONFIG_NET_SELFTESTS=y
+CONFIG_NLS=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_NR_CPUS=8
+CONFIG_NVMEM=y
+CONFIG_NVMEM_SYSFS=y
+CONFIG_OF=y
+CONFIG_OF_ADDRESS=y
+CONFIG_OF_EARLY_FLATTREE=y
+CONFIG_OF_FLATTREE=y
+CONFIG_OF_GPIO=y
+CONFIG_OF_IRQ=y
+CONFIG_OF_KOBJ=y
+CONFIG_OF_MDIO=y
+CONFIG_OID_REGISTRY=y
+CONFIG_PADATA=y
+CONFIG_PAGE_OFFSET=0xffffffe000000000
+CONFIG_PAGE_REPORTING=y
+CONFIG_PA_BITS=56
+CONFIG_PCI=y
+CONFIG_PCIEAER=y
+CONFIG_PCIEAER_INJECT=m
+CONFIG_PCIEASPM=y
+CONFIG_PCIEASPM_DEFAULT=y
+# CONFIG_PCIEASPM_PERFORMANCE is not set
+# CONFIG_PCIEASPM_POWERSAVE is not set
+# CONFIG_PCIEASPM_POWER_SUPERSAVE is not set
+CONFIG_PCIEPORTBUS=y
+CONFIG_PCIE_DPC=y
+CONFIG_PCIE_DW=y
+CONFIG_PCIE_DW_HOST=y
+CONFIG_PCIE_ECRC=y
+CONFIG_PCIE_FU740=y
+CONFIG_PCIE_PTM=y
+CONFIG_PCIE_XILINX=y
+CONFIG_PCI_DEBUG=y
+CONFIG_PCI_DOMAINS=y
+CONFIG_PCI_DOMAINS_GENERIC=y
+CONFIG_PCI_ECAM=y
+CONFIG_PCI_HOST_COMMON=y
+CONFIG_PCI_HOST_GENERIC=y
+CONFIG_PCI_MSI=y
+CONFIG_PCI_MSI_IRQ_DOMAIN=y
+CONFIG_PCI_SW_SWITCHTEC=y
+CONFIG_PGTABLE_LEVELS=3
+CONFIG_PHYLIB=y
+CONFIG_PHYLINK=y
+CONFIG_PHYS_ADDR_T_64BIT=y
+# CONFIG_PHYS_RAM_BASE_FIXED is not set
+CONFIG_POWER_RESET=y
+CONFIG_POWER_RESET_GPIO=y
+CONFIG_POWER_RESET_GPIO_RESTART=y
+CONFIG_POWER_RESET_RESTART=y
+CONFIG_POWER_RESET_SYSCON=y
+CONFIG_POWER_RESET_SYSCON_POWEROFF=y
+CONFIG_PPS=y
+CONFIG_PRINTK_TIME=y
+CONFIG_PTP_1588_CLOCK=y
+CONFIG_PTP_1588_CLOCK_OPTIONAL=y
+CONFIG_PWM=y
+CONFIG_PWM_SIFIVE=y
+CONFIG_PWM_SYSFS=y
+CONFIG_RATIONAL=y
+CONFIG_RCU_TRACE=y
+CONFIG_RD_GZIP=y
+CONFIG_REALTEK_PHY=y
+CONFIG_REGMAP=y
+CONFIG_REGMAP_I2C=y
+CONFIG_REGMAP_IRQ=y
+CONFIG_REGMAP_MMIO=y
+# CONFIG_RESET_ATTACK_MITIGATION is not set
+CONFIG_RESET_CONTROLLER=y
+CONFIG_RESET_SIMPLE=y
+CONFIG_RFS_ACCEL=y
+CONFIG_RISCV=y
+CONFIG_RISCV_ERRATA_ALTERNATIVE=y
+CONFIG_RISCV_INTC=y
+CONFIG_RISCV_ISA_C=y
+CONFIG_RISCV_SBI=y
+CONFIG_RISCV_SBI_V01=y
+CONFIG_RISCV_TIMER=y
+CONFIG_RPS=y
+CONFIG_RTC_CLASS=y
+# CONFIG_RTC_DRV_EFI is not set
+CONFIG_RTC_I2C_AND_SPI=y
+CONFIG_RWSEM_SPIN_ON_OWNER=y
+CONFIG_SCHED_DEBUG=y
+CONFIG_SCSI=y
+CONFIG_SCSI_COMMON=y
+CONFIG_SERIAL_8250_DEPRECATED_OPTIONS=y
+CONFIG_SERIAL_8250_EXAR=y
+CONFIG_SERIAL_8250_NR_UARTS=4
+CONFIG_SERIAL_8250_PCI=y
+CONFIG_SERIAL_8250_RUNTIME_UARTS=4
+CONFIG_SERIAL_EARLYCON_RISCV_SBI=y
+CONFIG_SERIAL_MCTRL_GPIO=y
+CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_SERIAL_SIFIVE=y
+CONFIG_SERIAL_SIFIVE_CONSOLE=y
+CONFIG_SERIO=y
+CONFIG_SERIO_SERPORT=y
+CONFIG_SG_POOL=y
+CONFIG_SIFIVE_L2=y
+CONFIG_SIFIVE_PLIC=y
+CONFIG_SLUB_DEBUG=y
+CONFIG_SMP=y
+CONFIG_SOCK_RX_QUEUE_MAPPING=y
+# CONFIG_SOC_MICROCHIP_POLARFIRE is not set
+CONFIG_SOC_SIFIVE=y
+# CONFIG_SOC_VIRT is not set
+CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
+CONFIG_SPARSE_IRQ=y
+CONFIG_SPI=y
+CONFIG_SPI_BITBANG=y
+CONFIG_SPI_MASTER=y
+CONFIG_SPI_MEM=y
+CONFIG_SPI_SIFIVE=y
+CONFIG_SRCU=y
+CONFIG_STACKTRACE=y
+CONFIG_SWIOTLB=y
+CONFIG_SWPHY=y
+CONFIG_SYSCTL_EXCEPTION_TRACE=y
+CONFIG_SYSFB=y
+# CONFIG_SYSFB_SIMPLEFB is not set
+CONFIG_THREAD_INFO_IN_TASK=y
+CONFIG_TICK_CPU_ACCOUNTING=y
+CONFIG_TIMER_OF=y
+CONFIG_TIMER_PROBE=y
+CONFIG_TRACE_CLOCK=y
+CONFIG_TREE_RCU=y
+CONFIG_TREE_SRCU=y
+CONFIG_TUNE_GENERIC=y
+CONFIG_UCS2_STRING=y
+CONFIG_UEVENT_HELPER_PATH=""
+CONFIG_USB=y
+CONFIG_USB_COMMON=y
+CONFIG_USB_EHCI_HCD=y
+# CONFIG_USB_EHCI_HCD_PLATFORM is not set
+CONFIG_USB_EHCI_PCI=y
+CONFIG_USB_HID=y
+CONFIG_USB_NET_DRIVERS=y
+CONFIG_USB_PCI=y
+CONFIG_USB_STORAGE=y
+CONFIG_USB_SUPPORT=y
+# CONFIG_USB_UHCI_HCD is not set
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_XHCI_PCI=y
+# CONFIG_USB_XHCI_PLATFORM is not set
+CONFIG_VA_BITS=39
+CONFIG_VFAT_FS=y
+CONFIG_VGA_ARB=y
+CONFIG_VGA_ARB_MAX_GPUS=16
+CONFIG_VMAP_STACK=y
+CONFIG_VM_EVENT_COUNTERS=y
+CONFIG_VT=y
+CONFIG_VT_CONSOLE=y
+# CONFIG_VT_HW_CONSOLE_BINDING is not set
+CONFIG_WATCHDOG_CORE=y
+CONFIG_XPS=y
+CONFIG_ZLIB_INFLATE=y
+CONFIG_ZONE_DMA32=y
diff --git a/target/linux/sifiveu/generic/target.mk b/target/linux/sifiveu/generic/target.mk
new file mode 100644
index 0000000000..f5cb1fb19b
--- /dev/null
+++ b/target/linux/sifiveu/generic/target.mk
@@ -0,0 +1 @@
+BOARDNAME:=Generic
diff --git a/target/linux/sifiveu/image/Config.in b/target/linux/sifiveu/image/Config.in
new file mode 100644
index 0000000000..640869b92c
--- /dev/null
+++ b/target/linux/sifiveu/image/Config.in
@@ -0,0 +1,5 @@
+config SIFIVEU_SD_BOOT_PARTSIZE
+ int "Boot (SD Card) filesystem partition size (in MB)"
+ depends on TARGET_sifiveu
+ default 32
+
diff --git a/target/linux/sifiveu/image/Makefile b/target/linux/sifiveu/image/Makefile
new file mode 100644
index 0000000000..ef3b13eeec
--- /dev/null
+++ b/target/linux/sifiveu/image/Makefile
@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Copyright (C) 2022 Toco Technologies <info@toco.ae>
+#
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/image.mk
+
+FAT32_BLOCK_SIZE=1024
+FAT32_BLOCKS=$(shell echo $$(($(CONFIG_SIFIVEU_SD_BOOT_PARTSIZE)*1024*1024/$(FAT32_BLOCK_SIZE))))
+
+KERNEL_LOADADDR:=0x80200000
+
+define Build/riscv-sdcard
+ rm -f $@.boot #$(KDIR_TMP)/$(IMG_PREFIX)-$(PROFILE)-boot.img
+ mkfs.fat $@.boot -C $(FAT32_BLOCKS)
+
+ mcopy -i $@.boot $(STAGING_DIR_IMAGE)/$(DEVICE_NAME)-boot.scr ::boot.scr
+ mcopy -i $@.boot $(DTS_DIR)/$(DEVICE_DTS).dtb ::dtb
+ mcopy -i $@.boot $(IMAGE_KERNEL) ::Image
+
+ ./gen_sifiveu_sdcard_img.sh \
+ $@ \
+ $@.boot \
+ $(IMAGE_ROOTFS) \
+ $(CONFIG_SIFIVEU_SD_BOOT_PARTSIZE) \
+ $(CONFIG_TARGET_ROOTFS_PARTSIZE) \
+ $(STAGING_DIR_IMAGE)/$(DEVICE_NAME)-u-boot.itb \
+ $(STAGING_DIR_IMAGE)/$(DEVICE_NAME)-u-boot.itb-spl
+endef
+
+define Device/Default
+ PROFILES := Default
+ KERNEL_NAME := Image
+ KERNEL := kernel-bin | libdeflate-gzip
+ IMAGES := sdcard.img.gz
+ IMAGE/sdcard.img.gz := riscv-sdcard | append-metadata | gzip
+endef
+
+define Device/sifive_unleashed
+ DEVICE_VENDOR := SiFive
+ DEVICE_MODEL := Unleashed (FU540)
+ DEVICE_DTS := sifive/hifive-unleashed-a00
+ UBOOT := sifive_unleashed
+endef
+TARGET_DEVICES += sifive_unleashed
+
+define Device/sifive_unmatched
+ DEVICE_VENDOR := SiFive
+ DEVICE_MODEL := Unmatched (FU740)
+ DEVICE_DTS := sifive/hifive-unmatched-a00
+ DEVICE_PACKAGES += kmod-eeprom-at24 kmod-hwmon-lm90
+ UBOOT := sifive_unmatched
+endef
+TARGET_DEVICES += sifive_unmatched
+
+$(eval $(call BuildImage))
diff --git a/target/linux/sifiveu/image/gen_sifiveu_sdcard_img.sh b/target/linux/sifiveu/image/gen_sifiveu_sdcard_img.sh
new file mode 100755
index 0000000000..172f62485d
--- /dev/null
+++ b/target/linux/sifiveu/image/gen_sifiveu_sdcard_img.sh
@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Copyright (C) 2022 OpenWrt.org
+#
+
+set -ex
+[ $# -eq 7 ] || {
+ echo "SYNTAX: $0 <file> <bootfs image> <rootfs image> <bootfs size> <rootfs size> <u-boot ITB image> <u-boot SPL>"
+ exit 1
+}
+
+OUTPUT="$1"
+BOOTFS="$2"
+ROOTFS="$3"
+BOOTFSSIZE="$4"
+ROOTFSSIZE="$5"
+UBOOT="$6"
+UBOOT_SPL="$7"
+
+set $(ptgen -o $OUTPUT -v -g -T sifiveu_spl -N loader1 -p 1024 -T sifiveu_uboot -N loader2 -p 4096 -t ef -N boot -p ${BOOTFSSIZE}M -N rootfs -p ${ROOTFSSIZE}M)
+
+ROOTFSOFFSET=$(($7 / 512))
+
+dd bs=512 if="$UBOOT_SPL" of="$OUTPUT" seek=34 conv=notrunc
+dd bs=512 if="$UBOOT" of="$OUTPUT" seek=2082 conv=notrunc
+dd bs=512 if="$BOOTFS" of="$OUTPUT" seek=10274 conv=notrunc
+dd bs=512 if="$ROOTFS" of="$OUTPUT" seek=${ROOTFSOFFSET} conv=notrunc
diff --git a/target/linux/sifiveu/patches-5.15/0001-riscv-sifive-fu740-cpu-1-2-3-4-set-compatible-to-sif.patch b/target/linux/sifiveu/patches-5.15/0001-riscv-sifive-fu740-cpu-1-2-3-4-set-compatible-to-sif.patch
new file mode 100644
index 0000000000..9a1c968139
--- /dev/null
+++ b/target/linux/sifiveu/patches-5.15/0001-riscv-sifive-fu740-cpu-1-2-3-4-set-compatible-to-sif.patch
@@ -0,0 +1,49 @@
+From ab5c8f5492cce16ff2104393e2f1fa64a3ff6e88 Mon Sep 17 00:00:00 2001
+From: David Abdurachmanov <david.abdurachmanov@sifive.com>
+Date: Wed, 17 Feb 2021 06:06:14 -0800
+Subject: [PATCH 1/7] riscv: sifive: fu740: cpu{1,2,3,4} set compatible to
+ sifive,u74-mc
+
+Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>
+---
+ arch/riscv/boot/dts/sifive/fu740-c000.dtsi | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+--- a/arch/riscv/boot/dts/sifive/fu740-c000.dtsi
++++ b/arch/riscv/boot/dts/sifive/fu740-c000.dtsi
+@@ -39,7 +39,7 @@
+ };
+ };
+ cpu1: cpu@1 {
+- compatible = "sifive,bullet0", "riscv";
++ compatible = "sifive,u74-mc", "sifive,bullet0", "riscv";
+ d-cache-block-size = <64>;
+ d-cache-sets = <64>;
+ d-cache-size = <32768>;
+@@ -63,7 +63,7 @@
+ };
+ };
+ cpu2: cpu@2 {
+- compatible = "sifive,bullet0", "riscv";
++ compatible = "sifive,u74-mc", "sifive,bullet0", "riscv";
+ d-cache-block-size = <64>;
+ d-cache-sets = <64>;
+ d-cache-size = <32768>;
+@@ -87,7 +87,7 @@
+ };
+ };
+ cpu3: cpu@3 {
+- compatible = "sifive,bullet0", "riscv";
++ compatible = "sifive,u74-mc", "sifive,bullet0", "riscv";
+ d-cache-block-size = <64>;
+ d-cache-sets = <64>;
+ d-cache-size = <32768>;
+@@ -111,7 +111,7 @@
+ };
+ };
+ cpu4: cpu@4 {
+- compatible = "sifive,bullet0", "riscv";
++ compatible = "sifive,u74-mc", "sifive,bullet0", "riscv";
+ d-cache-block-size = <64>;
+ d-cache-sets = <64>;
+ d-cache-size = <32768>;
diff --git a/target/linux/sifiveu/patches-5.15/0002-riscv-sifive-unmatched-update-regulators-values.patch b/target/linux/sifiveu/patches-5.15/0002-riscv-sifive-unmatched-update-regulators-values.patch
new file mode 100644
index 0000000000..ac316e9d9b
--- /dev/null
+++ b/target/linux/sifiveu/patches-5.15/0002-riscv-sifive-unmatched-update-regulators-values.patch
@@ -0,0 +1,104 @@
+From 657819ff477dd73cd71075609698aa57ba098d8c Mon Sep 17 00:00:00 2001
+From: David Abdurachmanov <david.abdurachmanov@sifive.com>
+Date: Wed, 15 Sep 2021 07:10:02 -0700
+Subject: [PATCH 2/7] riscv: sifive: unmatched: update regulators values
+
+These are the regulators values from the schematics for Rev3{A,B} boards.
+
+Note this is not fully correct as bcore1/bcore2 and bmem/bio are merged, but
+it's only supported in v5.15 kernel. See:
+
+541ee8f640327f951e7039278057827322231ab0 ("regulator: da9063: Add support for
+full-current mode.")
+
+This will be changed for v5.15 kernel based on the patch above.
+
+Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>
+---
+ .../riscv/boot/dts/sifive/hifive-unmatched-a00.dts | 32 +++++++++++-----------
+ 1 file changed, 16 insertions(+), 16 deletions(-)
+
+--- a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
++++ b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
+@@ -73,16 +73,16 @@
+
+ regulators {
+ vdd_bcore1: bcore1 {
+- regulator-min-microvolt = <900000>;
+- regulator-max-microvolt = <900000>;
++ regulator-min-microvolt = <1050000>;
++ regulator-max-microvolt = <1050000>;
+ regulator-min-microamp = <5000000>;
+ regulator-max-microamp = <5000000>;
+ regulator-always-on;
+ };
+
+ vdd_bcore2: bcore2 {
+- regulator-min-microvolt = <900000>;
+- regulator-max-microvolt = <900000>;
++ regulator-min-microvolt = <1050000>;
++ regulator-max-microvolt = <1050000>;
+ regulator-min-microamp = <5000000>;
+ regulator-max-microamp = <5000000>;
+ regulator-always-on;
+@@ -137,48 +137,48 @@
+ };
+
+ vdd_ldo3: ldo3 {
+- regulator-min-microvolt = <1800000>;
+- regulator-max-microvolt = <1800000>;
++ regulator-min-microvolt = <3300000>;
++ regulator-max-microvolt = <3300000>;
+ regulator-min-microamp = <200000>;
+ regulator-max-microamp = <200000>;
+ regulator-always-on;
+ };
+
+ vdd_ldo4: ldo4 {
+- regulator-min-microvolt = <1800000>;
+- regulator-max-microvolt = <1800000>;
++ regulator-min-microvolt = <2500000>;
++ regulator-max-microvolt = <2500000>;
+ regulator-min-microamp = <200000>;
+ regulator-max-microamp = <200000>;
+ regulator-always-on;
+ };
+
+ vdd_ldo5: ldo5 {
+- regulator-min-microvolt = <1800000>;
+- regulator-max-microvolt = <1800000>;
++ regulator-min-microvolt = <3300000>;
++ regulator-max-microvolt = <3300000>;
+ regulator-min-microamp = <100000>;
+ regulator-max-microamp = <100000>;
+ regulator-always-on;
+ };
+
+ vdd_ldo6: ldo6 {
+- regulator-min-microvolt = <3300000>;
+- regulator-max-microvolt = <3300000>;
++ regulator-min-microvolt = <1800000>;
++ regulator-max-microvolt = <1800000>;
+ regulator-min-microamp = <200000>;
+ regulator-max-microamp = <200000>;
+ regulator-always-on;
+ };
+
+ vdd_ldo7: ldo7 {
+- regulator-min-microvolt = <1800000>;
+- regulator-max-microvolt = <1800000>;
++ regulator-min-microvolt = <3300000>;
++ regulator-max-microvolt = <3300000>;
+ regulator-min-microamp = <200000>;
+ regulator-max-microamp = <200000>;
+ regulator-always-on;
+ };
+
+ vdd_ldo8: ldo8 {
+- regulator-min-microvolt = <1800000>;
+- regulator-max-microvolt = <1800000>;
++ regulator-min-microvolt = <3300000>;
++ regulator-max-microvolt = <3300000>;
+ regulator-min-microamp = <200000>;
+ regulator-max-microamp = <200000>;
+ regulator-always-on;
diff --git a/target/linux/sifiveu/patches-5.15/0003-riscv-sifive-unmatched-define-PWM-LEDs.patch b/target/linux/sifiveu/patches-5.15/0003-riscv-sifive-unmatched-define-PWM-LEDs.patch
new file mode 100644
index 0000000000..661e15905f
--- /dev/null
+++ b/target/linux/sifiveu/patches-5.15/0003-riscv-sifive-unmatched-define-PWM-LEDs.patch
@@ -0,0 +1,69 @@
+From 2c2d8ac8c124a2938c9326c14b2dffd46d76b4a8 Mon Sep 17 00:00:00 2001
+From: David Abdurachmanov <david.abdurachmanov@sifive.com>
+Date: Mon, 13 Sep 2021 02:15:37 -0700
+Subject: [PATCH 3/7] riscv: sifive: unmatched: define PWM LEDs
+
+Add D2 (RGB) and D12 (green) LEDs for SiFive Unmatched board.
+
+Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>
+---
+ .../riscv/boot/dts/sifive/hifive-unmatched-a00.dts | 41 ++++++++++++++++++++++
+ 1 file changed, 41 insertions(+)
+
+--- a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
++++ b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
+@@ -4,6 +4,8 @@
+ #include "fu740-c000.dtsi"
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
++#include <dt-bindings/leds/common.h>
++#include <dt-bindings/pwm/pwm.h>
+
+ /* Clock frequency (in Hz) of the PCB crystal for rtcclk */
+ #define RTCCLK_FREQ 1000000
+@@ -31,6 +33,45 @@
+ soc {
+ };
+
++ pwmleds {
++ compatible = "pwm-leds";
++ green-d12 {
++ label = "green:d12";
++ color = <LED_COLOR_ID_GREEN>;
++ pwms = <&pwm0 0 7812500 PWM_POLARITY_INVERTED>;
++ active-low = <1>;
++ max-brightness = <255>;
++ linux,default-trigger = "none";
++ };
++
++ green-d2 {
++ label = "green:d2";
++ color = <LED_COLOR_ID_GREEN>;
++ pwms = <&pwm0 1 7812500 PWM_POLARITY_INVERTED>;
++ active-low = <1>;
++ max-brightness = <255>;
++ linux,default-trigger = "none";
++ };
++
++ red-d2 {
++ label = "red:d2";
++ color = <LED_COLOR_ID_RED>;
++ pwms = <&pwm0 2 7812500 PWM_POLARITY_INVERTED>;
++ active-low = <1>;
++ max-brightness = <255>;
++ linux,default-trigger = "none";
++ };
++
++ blue-d2 {
++ label = "blue:d2";
++ color = <LED_COLOR_ID_BLUE>;
++ pwms = <&pwm0 3 7812500 PWM_POLARITY_INVERTED>;
++ active-low = <1>;
++ max-brightness = <255>;
++ linux,default-trigger = "none";
++ };
++ };
++
+ hfclk: hfclk {
+ #clock-cells = <0>;
+ compatible = "fixed-clock";
diff --git a/target/linux/sifiveu/patches-5.15/0004-riscv-sifive-unmatched-add-gpio-poweroff-node.patch b/target/linux/sifiveu/patches-5.15/0004-riscv-sifive-unmatched-add-gpio-poweroff-node.patch
new file mode 100644
index 0000000000..6d09628cb3
--- /dev/null
+++ b/target/linux/sifiveu/patches-5.15/0004-riscv-sifive-unmatched-add-gpio-poweroff-node.patch
@@ -0,0 +1,26 @@
+From 14ede57943bc4209755d08daf93ac7be967d7fbe Mon Sep 17 00:00:00 2001
+From: David Abdurachmanov <david.abdurachmanov@sifive.com>
+Date: Mon, 13 Sep 2021 02:18:30 -0700
+Subject: [PATCH 4/7] riscv: sifive: unmatched: add gpio-poweroff node
+
+Add gpio-poweroff node to allow powering off the system.
+
+Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>
+---
+ arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+--- a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
++++ b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
+@@ -85,6 +85,11 @@
+ clock-frequency = <RTCCLK_FREQ>;
+ clock-output-names = "rtcclk";
+ };
++
++ gpio-poweroff {
++ compatible = "gpio-poweroff";
++ gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
++ };
+ };
+
+ &uart0 {
diff --git a/target/linux/sifiveu/patches-5.15/0005-riscv-sifive-unleashed-define-opp-table-cpufreq.patch b/target/linux/sifiveu/patches-5.15/0005-riscv-sifive-unleashed-define-opp-table-cpufreq.patch
new file mode 100644
index 0000000000..b5779e09cb
--- /dev/null
+++ b/target/linux/sifiveu/patches-5.15/0005-riscv-sifive-unleashed-define-opp-table-cpufreq.patch
@@ -0,0 +1,116 @@
+From d3cf2859a056273400fbdf9d389b75750ff6ca5e Mon Sep 17 00:00:00 2001
+From: David Abdurachmanov <david.abdurachmanov@sifive.com>
+Date: Fri, 14 May 2021 05:27:51 -0700
+Subject: [PATCH 6/7] riscv: sifive: unleashed: define opp table (cpufreq)
+
+Source: https://github.com/sifive/riscv-linux/commits/dev/paulw/cpufreq-dt-aloe-v5.3-rc4
+
+Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>
+---
+ arch/riscv/Kconfig | 8 +++++
+ arch/riscv/boot/dts/sifive/fu540-c000.dtsi | 5 ++++
+ .../riscv/boot/dts/sifive/hifive-unleashed-a00.dts | 34 ++++++++++++++++++++++
+ 3 files changed, 47 insertions(+)
+
+--- a/arch/riscv/Kconfig
++++ b/arch/riscv/Kconfig
+@@ -565,6 +565,14 @@ config BUILTIN_DTB
+ depends on OF
+ default y if XIP_KERNEL
+
++menu "CPU Power Management"
++
++source "drivers/cpuidle/Kconfig"
++
++source "drivers/cpufreq/Kconfig"
++
++endmenu
++
+ menu "Power management options"
+
+ source "kernel/power/Kconfig"
+--- a/arch/riscv/boot/dts/sifive/fu540-c000.dtsi
++++ b/arch/riscv/boot/dts/sifive/fu540-c000.dtsi
+@@ -30,6 +30,7 @@
+ i-cache-size = <16384>;
+ reg = <0>;
+ riscv,isa = "rv64imac";
++ clocks = <&prci PRCI_CLK_COREPLL>;
+ status = "disabled";
+ cpu0_intc: interrupt-controller {
+ #interrupt-cells = <1>;
+@@ -54,6 +55,7 @@
+ reg = <1>;
+ riscv,isa = "rv64imafdc";
+ tlb-split;
++ clocks = <&prci PRCI_CLK_COREPLL>;
+ next-level-cache = <&l2cache>;
+ cpu1_intc: interrupt-controller {
+ #interrupt-cells = <1>;
+@@ -78,6 +80,7 @@
+ reg = <2>;
+ riscv,isa = "rv64imafdc";
+ tlb-split;
++ clocks = <&prci PRCI_CLK_COREPLL>;
+ next-level-cache = <&l2cache>;
+ cpu2_intc: interrupt-controller {
+ #interrupt-cells = <1>;
+@@ -102,6 +105,7 @@
+ reg = <3>;
+ riscv,isa = "rv64imafdc";
+ tlb-split;
++ clocks = <&prci PRCI_CLK_COREPLL>;
+ next-level-cache = <&l2cache>;
+ cpu3_intc: interrupt-controller {
+ #interrupt-cells = <1>;
+@@ -126,6 +130,7 @@
+ reg = <4>;
+ riscv,isa = "rv64imafdc";
+ tlb-split;
++ clocks = <&prci PRCI_CLK_COREPLL>;
+ next-level-cache = <&l2cache>;
+ cpu4_intc: interrupt-controller {
+ #interrupt-cells = <1>;
+--- a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
++++ b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
+@@ -84,6 +84,40 @@
+ label = "d4";
+ };
+ };
++
++ fu540_c000_opp_table: opp-table {
++ compatible = "operating-points-v2";
++ opp-shared;
++
++ opp-350000000 {
++ opp-hz = /bits/ 64 <350000000>;
++ };
++ opp-700000000 {
++ opp-hz = /bits/ 64 <700000000>;
++ };
++ opp-999999999 {
++ opp-hz = /bits/ 64 <999999999>;
++ };
++ opp-1400000000 {
++ opp-hz = /bits/ 64 <1400000000>;
++ };
++ };
++};
++
++&cpu0 {
++ operating-points-v2 = <&fu540_c000_opp_table>;
++};
++&cpu1 {
++ operating-points-v2 = <&fu540_c000_opp_table>;
++};
++&cpu2 {
++ operating-points-v2 = <&fu540_c000_opp_table>;
++};
++&cpu3 {
++ operating-points-v2 = <&fu540_c000_opp_table>;
++};
++&cpu4 {
++ operating-points-v2 = <&fu540_c000_opp_table>;
+ };
+
+ &uart0 {
diff --git a/target/linux/sifiveu/patches-5.15/0006-riscv-sbi-srst-support.patch b/target/linux/sifiveu/patches-5.15/0006-riscv-sbi-srst-support.patch
new file mode 100644
index 0000000000..409001bcfa
--- /dev/null
+++ b/target/linux/sifiveu/patches-5.15/0006-riscv-sbi-srst-support.patch
@@ -0,0 +1,301 @@
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+ ([fe80::a153:b7f8:c87f:89f8%9]) with mapi id 15.20.4219.021; Wed, 9 Jun 2021
+ 12:13:47 +0000
+From: Anup Patel <anup.patel@wdc.com>
+To: Palmer Dabbelt <palmer@dabbelt.com>,
+ Palmer Dabbelt <palmerdabbelt@google.com>,
+ Paul Walmsley <paul.walmsley@sifive.com>, Albert Ou <aou@eecs.berkeley.edu>
+Cc: Atish Patra <atish.patra@wdc.com>,
+ Alistair Francis <Alistair.Francis@wdc.com>,
+ Anup Patel <anup@brainfault.org>, linux-riscv@lists.infradead.org,
+ linux-kernel@vger.kernel.org, Anup Patel <anup.patel@wdc.com>
+Subject: [PATCH v7 1/1] RISC-V: Use SBI SRST extension when available
+Date: Wed, 9 Jun 2021 17:43:22 +0530
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+
+The SBI SRST extension provides a standard way to poweroff and
+reboot the system irrespective to whether Linux RISC-V S-mode
+is running natively (HS-mode) or inside Guest/VM (VS-mode).
+
+The SBI SRST extension is available in the SBI v0.3 specification.
+(Refer, https://github.com/riscv/riscv-sbi-doc/releases/tag/v0.3.0-rc1)
+
+This patch extends Linux RISC-V SBI implementation to detect
+and use SBI SRST extension.
+
+Signed-off-by: Anup Patel <anup.patel@wdc.com>
+Reviewed-by: Atish Patra <atish.patra@wdc.com>
+---
+ arch/riscv/include/asm/sbi.h | 24 ++++++++++++++++++++++++
+ arch/riscv/kernel/sbi.c | 35 +++++++++++++++++++++++++++++++++++
+ 2 files changed, 59 insertions(+)
+
+--- a/arch/riscv/include/asm/sbi.h
++++ b/arch/riscv/include/asm/sbi.h
+@@ -27,6 +27,7 @@ enum sbi_ext_id {
+ SBI_EXT_IPI = 0x735049,
+ SBI_EXT_RFENCE = 0x52464E43,
+ SBI_EXT_HSM = 0x48534D,
++ SBI_EXT_SRST = 0x53525354,
+ };
+
+ enum sbi_ext_base_fid {
+@@ -70,6 +71,21 @@ enum sbi_hsm_hart_status {
+ SBI_HSM_HART_STATUS_STOP_PENDING,
+ };
+
++enum sbi_ext_srst_fid {
++ SBI_EXT_SRST_RESET = 0,
++};
++
++enum sbi_srst_reset_type {
++ SBI_SRST_RESET_TYPE_SHUTDOWN = 0,
++ SBI_SRST_RESET_TYPE_COLD_REBOOT,
++ SBI_SRST_RESET_TYPE_WARM_REBOOT,
++};
++
++enum sbi_srst_reset_reason {
++ SBI_SRST_RESET_REASON_NONE = 0,
++ SBI_SRST_RESET_REASON_SYS_FAILURE,
++};
++
+ #define SBI_SPEC_VERSION_DEFAULT 0x1
+ #define SBI_SPEC_VERSION_MAJOR_SHIFT 24
+ #define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
+@@ -148,6 +164,14 @@ static inline unsigned long sbi_minor_ve
+ return sbi_spec_version & SBI_SPEC_VERSION_MINOR_MASK;
+ }
+
++/* Make SBI version */
++static inline unsigned long sbi_mk_version(unsigned long major,
++ unsigned long minor)
++{
++ return ((major & SBI_SPEC_VERSION_MAJOR_MASK) <<
++ SBI_SPEC_VERSION_MAJOR_SHIFT) | minor;
++}
++
+ int sbi_err_map_linux_errno(int err);
+ #else /* CONFIG_RISCV_SBI */
+ static inline int sbi_remote_fence_i(const unsigned long *hart_mask) { return -1; }
+--- a/arch/riscv/kernel/sbi.c
++++ b/arch/riscv/kernel/sbi.c
+@@ -7,6 +7,7 @@
+
+ #include <linux/init.h>
+ #include <linux/pm.h>
++#include <linux/reboot.h>
+ #include <asm/sbi.h>
+ #include <asm/smp.h>
+
+@@ -501,6 +502,32 @@ int sbi_remote_hfence_vvma_asid(const un
+ }
+ EXPORT_SYMBOL(sbi_remote_hfence_vvma_asid);
+
++static void sbi_srst_reset(unsigned long type, unsigned long reason)
++{
++ sbi_ecall(SBI_EXT_SRST, SBI_EXT_SRST_RESET, type, reason,
++ 0, 0, 0, 0);
++ pr_warn("%s: type=0x%lx reason=0x%lx failed\n",
++ __func__, type, reason);
++}
++
++static int sbi_srst_reboot(struct notifier_block *this,
++ unsigned long mode, void *cmd)
++{
++ sbi_srst_reset((mode == REBOOT_WARM || mode == REBOOT_SOFT) ?
++ SBI_SRST_RESET_TYPE_WARM_REBOOT :
++ SBI_SRST_RESET_TYPE_COLD_REBOOT,
++ SBI_SRST_RESET_REASON_NONE);
++ return NOTIFY_DONE;
++}
++
++static struct notifier_block sbi_srst_reboot_nb;
++
++static void sbi_srst_power_off(void)
++{
++ sbi_srst_reset(SBI_SRST_RESET_TYPE_SHUTDOWN,
++ SBI_SRST_RESET_REASON_NONE);
++}
++
+ /**
+ * sbi_probe_extension() - Check if an SBI extension ID is supported or not.
+ * @extid: The extension ID to be probed.
+@@ -608,6 +635,14 @@ void __init sbi_init(void)
+ } else {
+ __sbi_rfence = __sbi_rfence_v01;
+ }
++ if ((sbi_spec_version >= sbi_mk_version(0, 3)) &&
++ (sbi_probe_extension(SBI_EXT_SRST) > 0)) {
++ pr_info("SBI SRST extension detected\n");
++ pm_power_off = sbi_srst_power_off;
++ sbi_srst_reboot_nb.notifier_call = sbi_srst_reboot;
++ sbi_srst_reboot_nb.priority = 192;
++ register_restart_handler(&sbi_srst_reboot_nb);
++ }
+ } else {
+ __sbi_set_timer = __sbi_set_timer_v01;
+ __sbi_send_ipi = __sbi_send_ipi_v01;