oxnas: add 5.4 as testing kernel version

Add 5.4 kernel version as a new testing kernel option.
Run-tested on Shuttle KD20, seems to work just as well as kernel 4.14.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

23 files changed, 2205 insertions, 19 deletions

diff --git a/target/linux/oxnas/Makefile b/target/linux/oxnas/Makefile
index 52d57f336a..2f9b9f4546 100644
--- a/target/linux/oxnas/Makefile
+++ b/target/linux/oxnas/Makefile
@@ -10,6 +10,7 @@ DEVICE_TYPE:=nas
 MAINTAINER:=Daniel Golle <daniel@makrotopia.org>
 
 KERNEL_PATCHVER:=4.14
+KERNEL_TESTING_PATCHVER:=5.4
 
 include $(INCLUDE_DIR)/target.mk
 
diff --git a/target/linux/oxnas/config-5.4 b/target/linux/oxnas/config-5.4
new file mode 100644
index 0000000000..85e41d9c85
--- /dev/null
+++ b/target/linux/oxnas/config-5.4
@@ -0,0 +1,367 @@
+CONFIG_64BIT_TIME=y
+CONFIG_ALIGNMENT_TRAP=y
+CONFIG_ARCH_32BIT_OFF_T=y
+CONFIG_ARCH_CLOCKSOURCE_DATA=y
+CONFIG_ARCH_HAS_BINFMT_FLAT=y
+CONFIG_ARCH_HAS_DEBUG_VIRTUAL=y
+CONFIG_ARCH_HAS_DMA_WRITE_COMBINE=y
+CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
+CONFIG_ARCH_HAS_FORTIFY_SOURCE=y
+CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
+CONFIG_ARCH_HAS_KCOV=y
+CONFIG_ARCH_HAS_KEEPINITRD=y
+CONFIG_ARCH_HAS_MEMBARRIER_SYNC_CORE=y
+CONFIG_ARCH_HAS_PHYS_TO_DMA=y
+CONFIG_ARCH_HAS_RESET_CONTROLLER=y
+CONFIG_ARCH_HAS_SETUP_DMA_OPS=y
+CONFIG_ARCH_HAS_SET_MEMORY=y
+CONFIG_ARCH_HAS_STRICT_KERNEL_RWX=y
+CONFIG_ARCH_HAS_STRICT_MODULE_RWX=y
+CONFIG_ARCH_HAS_TEARDOWN_DMA_OPS=y
+CONFIG_ARCH_HAVE_CUSTOM_GPIO_H=y
+CONFIG_ARCH_HIBERNATION_POSSIBLE=y
+CONFIG_ARCH_KEEP_MEMBLOCK=y
+CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y
+CONFIG_ARCH_MULTIPLATFORM=y
+CONFIG_ARCH_MULTI_CPU_AUTO=y
+# CONFIG_ARCH_MULTI_V4 is not set
+# CONFIG_ARCH_MULTI_V4T is not set
+CONFIG_ARCH_MULTI_V4_V5=y
+CONFIG_ARCH_MULTI_V5=y
+CONFIG_ARCH_NR_GPIO=0
+CONFIG_ARCH_OPTIONAL_KERNEL_RWX=y
+CONFIG_ARCH_OXNAS=y
+CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
+CONFIG_ARCH_SUPPORTS_UPROBES=y
+CONFIG_ARCH_SUSPEND_POSSIBLE=y
+CONFIG_ARCH_USE_BUILTIN_BSWAP=y
+CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
+CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT=y
+CONFIG_ARCH_WANT_GENERAL_HUGETLB=y
+CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
+CONFIG_ARCH_WANT_LIBATA_LEDS=y
+CONFIG_ARM=y
+CONFIG_ARM_APPENDED_DTB=y
+CONFIG_ARM_ATAG_DTB_COMPAT=y
+# CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND is not set
+# CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER is not set
+CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE=y
+CONFIG_ARM_CPU_SUSPEND=y
+CONFIG_ARM_HAS_SG_CHAIN=y
+CONFIG_ARM_L1_CACHE_SHIFT=5
+CONFIG_ARM_PATCH_PHYS_VIRT=y
+CONFIG_ARM_PMU=y
+# CONFIG_ARM_SMMU is not set
+CONFIG_ARM_THUMB=y
+CONFIG_ARM_UNWIND=y
+CONFIG_ATAGS=y
+CONFIG_AUTO_ZRELADDR=y
+CONFIG_BINFMT_FLAT_ARGVP_ENVP_ON_STACK=y
+CONFIG_BLK_CMDLINE_PARSER=y
+CONFIG_BLK_DEBUG_FS=y
+CONFIG_BLK_DEV_BSG=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_COUNT=16
+CONFIG_BLK_DEV_RAM_SIZE=65536
+CONFIG_BLK_PM=y
+CONFIG_BLK_SCSI_REQUEST=y
+# CONFIG_BPF_SYSCALL is not set
+CONFIG_CC_HAS_KASAN_GENERIC=y
+CONFIG_CLKDEV_LOOKUP=y
+CONFIG_CLKSRC_MMIO=y
+CONFIG_CLONE_BACKWARDS=y
+CONFIG_CMA=y
+CONFIG_CMA_ALIGNMENT=8
+CONFIG_CMA_AREAS=7
+# CONFIG_CMA_DEBUG is not set
+# CONFIG_CMA_DEBUGFS is not set
+CONFIG_CMA_SIZE_MBYTES=64
+# CONFIG_CMA_SIZE_SEL_MAX is not set
+CONFIG_CMA_SIZE_SEL_MBYTES=y
+# CONFIG_CMA_SIZE_SEL_MIN is not set
+# CONFIG_CMA_SIZE_SEL_PERCENTAGE is not set
+CONFIG_CMDLINE_PARTITION=y
+CONFIG_COMMON_CLK=y
+CONFIG_COMMON_CLK_OXNAS=y
+CONFIG_COMPAT_32BIT_TIME=y
+CONFIG_CONTIG_ALLOC=y
+CONFIG_COREDUMP=y
+CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
+CONFIG_CPU_32v5=y
+CONFIG_CPU_ABRT_EV5TJ=y
+CONFIG_CPU_ARM926T=y
+# CONFIG_CPU_CACHE_ROUND_ROBIN is not set
+CONFIG_CPU_CACHE_VIVT=y
+CONFIG_CPU_COPY_V4WB=y
+CONFIG_CPU_CP15=y
+CONFIG_CPU_CP15_MMU=y
+# CONFIG_CPU_DCACHE_WRITETHROUGH is not set
+# CONFIG_CPU_ICACHE_DISABLE is not set
+CONFIG_CPU_PABRT_LEGACY=y
+CONFIG_CPU_PM=y
+# CONFIG_CPU_IDLE_GOV_TEO is not set
+CONFIG_CPU_THUMB_CAPABLE=y
+CONFIG_CPU_TLB_V4WBI=y
+CONFIG_CPU_USE_DOMAINS=y
+CONFIG_CRASH_CORE=y
+CONFIG_CRC16=y
+# CONFIG_CRC32_SARWATE is not set
+CONFIG_CRC32_SLICEBY8=y
+CONFIG_CROSS_MEMORY_ATTACH=y
+CONFIG_CRYPTO_RNG2=y
+CONFIG_DEBUG_ALIGN_RODATA=y
+CONFIG_DEBUG_BUGVERBOSE=y
+CONFIG_DEBUG_LL_INCLUDE="mach/debug-macro.S"
+# CONFIG_DEBUG_USER is not set
+CONFIG_DECOMPRESS_BZIP2=y
+CONFIG_DECOMPRESS_GZIP=y
+CONFIG_DECOMPRESS_LZ4=y
+CONFIG_DECOMPRESS_LZMA=y
+CONFIG_DECOMPRESS_LZO=y
+CONFIG_DECOMPRESS_XZ=y
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+CONFIG_DMA_CMA=y
+CONFIG_DMA_DECLARE_COHERENT=y
+CONFIG_DMA_REMAP=y
+CONFIG_DNOTIFY=y
+CONFIG_DTC=y
+# CONFIG_DWMAC_DWC_QOS_ETH is not set
+CONFIG_DWMAC_GENERIC=y
+CONFIG_DWMAC_OXNAS=y
+CONFIG_EDAC_ATOMIC_SCRUB=y
+CONFIG_EDAC_SUPPORT=y
+CONFIG_ELF_CORE=y
+CONFIG_FAT_FS=y
+CONFIG_FIXED_PHY=y
+CONFIG_FIX_EARLYCON_MEM=y
+CONFIG_FREEZER=y
+CONFIG_FW_LOADER_PAGED_BUF=y
+CONFIG_GENERIC_ALLOCATOR=y
+CONFIG_GENERIC_ATOMIC64=y
+CONFIG_GENERIC_BUG=y
+CONFIG_GENERIC_CLOCKEVENTS=y
+CONFIG_GENERIC_CPU_AUTOPROBE=y
+CONFIG_GENERIC_EARLY_IOREMAP=y
+CONFIG_GENERIC_IDLE_POLL_SETUP=y
+CONFIG_GENERIC_IRQ_MULTI_HANDLER=y
+CONFIG_GENERIC_IRQ_SHOW=y
+CONFIG_GENERIC_IRQ_SHOW_LEVEL=y
+CONFIG_GENERIC_PCI_IOMAP=y
+CONFIG_GENERIC_PHY=y
+CONFIG_GENERIC_PINCONF=y
+CONFIG_GENERIC_SCHED_CLOCK=y
+CONFIG_GENERIC_SMP_IDLE_THREAD=y
+CONFIG_GENERIC_STRNCPY_FROM_USER=y
+CONFIG_GENERIC_STRNLEN_USER=y
+CONFIG_GPIOLIB=y
+CONFIG_GPIOLIB_IRQCHIP=y
+CONFIG_GPIO_GENERIC=y
+CONFIG_GPIO_GENERIC_PLATFORM=y
+CONFIG_HANDLE_DOMAIN_IRQ=y
+CONFIG_HARDIRQS_SW_RESEND=y
+CONFIG_HAS_DMA=y
+CONFIG_HAS_IOMEM=y
+CONFIG_HAS_IOPORT_MAP=y
+CONFIG_HAVE_ARCH_AUDITSYSCALL=y
+CONFIG_HAVE_ARCH_JUMP_LABEL=y
+CONFIG_HAVE_ARCH_KGDB=y
+CONFIG_HAVE_ARCH_PFN_VALID=y
+CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
+CONFIG_HAVE_ARCH_THREAD_STRUCT_WHITELIST=y
+CONFIG_HAVE_ARCH_TRACEHOOK=y
+CONFIG_HAVE_CLK=y
+CONFIG_HAVE_CLK_PREPARE=y
+CONFIG_HAVE_CONTEXT_TRACKING=y
+CONFIG_HAVE_COPY_THREAD_TLS=y
+CONFIG_HAVE_C_RECORDMCOUNT=y
+CONFIG_HAVE_DEBUG_KMEMLEAK=y
+CONFIG_HAVE_DMA_CONTIGUOUS=y
+CONFIG_HAVE_DYNAMIC_FTRACE=y
+CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS=y
+CONFIG_HAVE_EBPF_JIT=y
+CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
+CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
+CONFIG_HAVE_FUNCTION_TRACER=y
+CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
+CONFIG_HAVE_LD_DEAD_CODE_DATA_ELIMINATION=y
+CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
+CONFIG_HAVE_NET_DSA=y
+CONFIG_HAVE_OPROFILE=y
+CONFIG_HAVE_OPTPROBES=y
+CONFIG_HAVE_PCI=y
+CONFIG_HAVE_PERF_EVENTS=y
+CONFIG_HAVE_PERF_REGS=y
+CONFIG_HAVE_PERF_USER_STACK_DUMP=y
+CONFIG_HAVE_PROC_CPU=y
+CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
+CONFIG_HAVE_RSEQ=y
+CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
+CONFIG_HAVE_UID16=y
+CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
+CONFIG_HID=y
+CONFIG_HID_GENERIC=y
+CONFIG_HWMON=y
+CONFIG_HZ_FIXED=0
+CONFIG_ICPLUS_PHY=y
+CONFIG_INET_DIAG=y
+# CONFIG_INET_DIAG_DESTROY is not set
+# CONFIG_INET_RAW_DIAG is not set
+CONFIG_INET_TCP_DIAG=y
+CONFIG_INITRAMFS_SOURCE=""
+CONFIG_INPUT=y
+# CONFIG_IOMMU_DEBUGFS is not set
+# CONFIG_IOMMU_IO_PGTABLE_ARMV7S is not set
+# CONFIG_IOMMU_IO_PGTABLE_LPAE is not set
+CONFIG_IOMMU_SUPPORT=y
+CONFIG_IRQCHIP=y
+CONFIG_IRQ_DOMAIN=y
+CONFIG_IRQ_FORCED_THREADING=y
+CONFIG_IRQ_WORK=y
+# CONFIG_ISDN is not set
+# CONFIG_JFFS2_FS is not set
+CONFIG_KALLSYMS=y
+CONFIG_KASAN_STACK=1
+CONFIG_KERNEL_GZIP=y
+# CONFIG_KERNEL_XZ is not set
+CONFIG_KEXEC=y
+CONFIG_KEXEC_CORE=y
+# CONFIG_LEDS_BRIGHTNESS_HW_CHANGED is not set
+CONFIG_LEDS_GPIO=y
+CONFIG_LEDS_TRIGGER_CPU=y
+CONFIG_LEDS_TRIGGER_GPIO=y
+CONFIG_LEDS_TRIGGER_HEARTBEAT=y
+# CONFIG_LEDS_TRIGGER_NETDEV is not set
+CONFIG_LEDS_TRIGGER_ONESHOT=y
+CONFIG_LIBFDT=y
+CONFIG_LOCALVERSION_AUTO=y
+CONFIG_LOCK_DEBUGGING_SUPPORT=y
+CONFIG_LZ4_DECOMPRESS=y
+CONFIG_LZO_DECOMPRESS=y
+# CONFIG_MACH_OX810SE is not set
+CONFIG_MDIO_BUS=y
+CONFIG_MDIO_DEVICE=y
+CONFIG_MEMFD_CREATE=y
+CONFIG_MEMORY_ISOLATION=y
+CONFIG_MFD_SYSCON=y
+CONFIG_MIGRATION=y
+CONFIG_MODULES_TREE_LOOKUP=y
+CONFIG_MODULES_USE_ELF_REL=y
+CONFIG_NEED_DMA_MAP_STATE=y
+CONFIG_NEED_KUSER_HELPERS=y
+CONFIG_NEED_PER_CPU_KM=y
+CONFIG_NET_PTP_CLASSIFY=y
+CONFIG_NLS=y
+CONFIG_NO_HZ=y
+CONFIG_NO_HZ_COMMON=y
+CONFIG_NO_HZ_IDLE=y
+# CONFIG_NVMEM_REBOOT_MODE is not set
+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_OF_NET=y
+CONFIG_OF_RESERVED_MEM=y
+CONFIG_OLD_SIGACTION=y
+CONFIG_OLD_SIGSUSPEND3=y
+CONFIG_OXNAS_RPS_TIMER=y
+CONFIG_PAGE_OFFSET=0xC0000000
+CONFIG_PAGE_POOL=y
+# CONFIG_PANIC_ON_OOPS is not set
+CONFIG_PANIC_ON_OOPS_VALUE=0
+CONFIG_PANIC_TIMEOUT=0
+CONFIG_PERF_EVENTS=y
+CONFIG_PERF_USE_VMALLOC=y
+CONFIG_PGTABLE_LEVELS=2
+CONFIG_PHYLIB=y
+CONFIG_PHYLINK=y
+CONFIG_PHY_OXNAS=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_OXNAS=y
+# CONFIG_PINCTRL_SINGLE is not set
+CONFIG_PLUGIN_HOSTCC="g++"
+CONFIG_PM=y
+CONFIG_PM_CLK=y
+# CONFIG_PM_DEBUG is not set
+CONFIG_PM_SLEEP=y
+CONFIG_POWER_RESET=y
+CONFIG_POWER_RESET_OXNAS=y
+CONFIG_PPS=y
+CONFIG_PTP_1588_CLOCK=y
+CONFIG_RAS=y
+CONFIG_RATIONAL=y
+CONFIG_RCU_TRACE=y
+CONFIG_RD_BZIP2=y
+CONFIG_RD_GZIP=y
+CONFIG_RD_LZ4=y
+CONFIG_RD_LZMA=y
+CONFIG_RD_LZO=y
+CONFIG_RD_XZ=y
+CONFIG_REALTEK_PHY=y
+CONFIG_REFCOUNT_FULL=y
+CONFIG_REGMAP=y
+CONFIG_REGMAP_MMIO=y
+CONFIG_RESET_CONTROLLER=y
+CONFIG_RESET_OXNAS=y
+CONFIG_SCHED_DEBUG=y
+CONFIG_SERIAL_8250_DEPRECATED_OPTIONS=y
+CONFIG_SERIAL_8250_FSL=y
+CONFIG_SERIAL_8250_NR_UARTS=4
+CONFIG_SERIAL_8250_RUNTIME_UARTS=4
+CONFIG_SERIAL_MCTRL_GPIO=y
+CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_SERIO=y
+CONFIG_SERIO_LIBPS2=y
+CONFIG_SERIO_SERPORT=y
+CONFIG_SIMPLE_PM_BUS=y
+CONFIG_SLUB_DEBUG=y
+CONFIG_SOCK_DIAG=y
+CONFIG_SPARSE_IRQ=y
+CONFIG_SPLIT_PTLOCK_CPUS=999999
+CONFIG_SRCU=y
+CONFIG_STACKTRACE=y
+# CONFIG_STAGING is not set
+CONFIG_STMMAC_ETH=y
+CONFIG_STMMAC_PLATFORM=y
+# CONFIG_STMMAC_SELFTESTS is not set
+# CONFIG_STRIP_ASM_SYMS is not set
+CONFIG_SUSPEND=y
+CONFIG_SUSPEND_FREEZER=y
+CONFIG_SWPHY=y
+CONFIG_SYS_SUPPORTS_APM_EMULATION=y
+CONFIG_TICK_CPU_ACCOUNTING=y
+CONFIG_TIMER_OF=y
+CONFIG_TIMER_PROBE=y
+CONFIG_TINY_SRCU=y
+CONFIG_TRACE_CLOCK=y
+CONFIG_UBSAN_ALIGNMENT=y
+CONFIG_UEVENT_HELPER_PATH=""
+CONFIG_UNCOMPRESS_INCLUDE="debug/uncompress.h"
+CONFIG_UNIX_SCM=y
+CONFIG_UNWINDER_ARM=y
+# CONFIG_UNWINDER_FRAME_POINTER is not set
+CONFIG_USB_SUPPORT=y
+# CONFIG_USERIO is not set
+CONFIG_USE_OF=y
+CONFIG_VERSATILE_FPGA_IRQ=y
+CONFIG_VERSATILE_FPGA_IRQ_NR=4
+CONFIG_VFAT_FS=y
+# CONFIG_VFP is not set
+# CONFIG_VLAN_8021Q is not set
+CONFIG_VM_EVENT_COUNTERS=y
+# CONFIG_WATCHDOG is not set
+# CONFIG_WQ_POWER_EFFICIENT_DEFAULT is not set
+CONFIG_XZ_DEC_ARM=y
+CONFIG_XZ_DEC_BCJ=y
+CONFIG_XZ_DEC_IA64=y
+CONFIG_XZ_DEC_POWERPC=y
+CONFIG_XZ_DEC_SPARC=y
+CONFIG_XZ_DEC_X86=y
+CONFIG_ZBOOT_ROM_BSS=0
+CONFIG_ZBOOT_ROM_TEXT=0
+CONFIG_ZLIB_INFLATE=y
diff --git a/target/linux/oxnas/files/drivers/pci/host/pcie-oxnas.c b/target/linux/oxnas/files-4.14/drivers/pci/host/pcie-oxnas.c
index 1dd13f9364..1dd13f9364 100644
--- a/target/linux/oxnas/files/drivers/pci/host/pcie-oxnas.c
+++ b/target/linux/oxnas/files-4.14/drivers/pci/host/pcie-oxnas.c
diff --git a/target/linux/oxnas/files/drivers/phy/phy-oxnas-pcie.c b/target/linux/oxnas/files-4.14/phy/phy-oxnas-pcie.c
index 676a5f9332..676a5f9332 100644
--- a/target/linux/oxnas/files/drivers/phy/phy-oxnas-pcie.c
+++ b/target/linux/oxnas/files-4.14/phy/phy-oxnas-pcie.c
diff --git a/target/linux/oxnas/files-5.4/drivers/pci/controller/pcie-oxnas.c b/target/linux/oxnas/files-5.4/drivers/pci/controller/pcie-oxnas.c
new file mode 100644
index 0000000000..f2145e31b5
--- /dev/null
+++ b/target/linux/oxnas/files-5.4/drivers/pci/controller/pcie-oxnas.c
@@ -0,0 +1,674 @@
+/*
+ * PCIe driver for PLX NAS782X SoCs
+ *
+ * Author: Ma Haijun <mahaijuns@gmail.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/mbus.h>
+#include <linux/mfd/syscon.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/of_irq.h>
+#include <linux/of_pci.h>
+#include <linux/of_platform.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/phy.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include <linux/io.h>
+#include <linux/sizes.h>
+
+#include "../pci.h"
+
+#define SYS_CTRL_HCSL_CTRL_REGOFFSET	0x114
+
+static inline void oxnas_register_clear_mask(void __iomem *p, unsigned mask)
+{
+	u32 val = readl_relaxed(p);
+
+	val &= ~mask;
+	writel_relaxed(val, p);
+}
+
+static inline void oxnas_register_set_mask(void __iomem *p, unsigned mask)
+{
+	u32 val = readl_relaxed(p);
+
+	val |= mask;
+	writel_relaxed(val, p);
+}
+
+static inline void oxnas_register_value_mask(void __iomem *p,
+					     unsigned mask, unsigned new_value)
+{
+	/* TODO sanity check mask & new_value = new_value */
+	u32 val = readl_relaxed(p);
+
+	val &= ~mask;
+	val |= new_value;
+	writel_relaxed(val, p);
+}
+
+#define VERSION_ID_MAGIC		0x082510b5
+#define LINK_UP_TIMEOUT_SECONDS		1
+#define NUM_CONTROLLERS			1
+
+enum {
+	PCIE_DEVICE_TYPE_MASK = 0x0F,
+	PCIE_DEVICE_TYPE_ENDPOINT = 0,
+	PCIE_DEVICE_TYPE_LEGACY_ENDPOINT = 1,
+	PCIE_DEVICE_TYPE_ROOT = 4,
+
+	PCIE_LTSSM = BIT(4),
+	PCIE_READY_ENTR_L23 = BIT(9),
+	PCIE_LINK_UP = BIT(11),
+	PCIE_OBTRANS = BIT(12),
+};
+
+/* core config registers */
+enum {
+	PCI_CONFIG_VERSION_DEVICEID = 0,
+	PCI_CONFIG_COMMAND_STATUS = 4,
+};
+
+/* inbound config registers */
+enum {
+	IB_ADDR_XLATE_ENABLE = 0xFC,
+
+	/* bits */
+	ENABLE_IN_ADDR_TRANS = BIT(0),
+};
+
+/* outbound config registers, offset relative to PCIE_POM0_MEM_ADDR */
+enum {
+	PCIE_POM0_MEM_ADDR	= 0,
+	PCIE_POM1_MEM_ADDR	= 4,
+	PCIE_IN0_MEM_ADDR	= 8,
+	PCIE_IN1_MEM_ADDR	= 12,
+	PCIE_IN_IO_ADDR		= 16,
+	PCIE_IN_CFG0_ADDR	= 20,
+	PCIE_IN_CFG1_ADDR	= 24,
+	PCIE_IN_MSG_ADDR	= 28,
+	PCIE_IN0_MEM_LIMIT	= 32,
+	PCIE_IN1_MEM_LIMIT	= 36,
+	PCIE_IN_IO_LIMIT	= 40,
+	PCIE_IN_CFG0_LIMIT	= 44,
+	PCIE_IN_CFG1_LIMIT	= 48,
+	PCIE_IN_MSG_LIMIT	= 52,
+	PCIE_AHB_SLAVE_CTRL	= 56,
+
+	PCIE_SLAVE_BE_SHIFT	= 22,
+};
+
+#define PCIE_SLAVE_BE(val)	((val) << PCIE_SLAVE_BE_SHIFT)
+#define PCIE_SLAVE_BE_MASK	PCIE_SLAVE_BE(0xF)
+
+struct oxnas_pcie_shared {
+	/* seems all access are serialized, no lock required */
+	int refcount;
+};
+
+/* Structure representing one PCIe interfaces */
+struct oxnas_pcie {
+	void __iomem *cfgbase;
+	void __iomem *base;
+	void __iomem *inbound;
+	struct regmap *sys_ctrl;
+	unsigned int outbound_offset;
+	unsigned int pcie_ctrl_offset;
+	struct phy *phy;
+	int haslink;
+	struct platform_device *pdev;
+	struct resource io;
+	struct resource cfg;
+	struct resource pre_mem;	/* prefetchable */
+	struct resource non_mem;	/* non-prefetchable */
+	struct resource busn;		/* max available bus numbers */
+	int card_reset;			/* gpio pin, optional */
+	unsigned hcsl_en;		/* hcsl pci enable bit */
+	struct clk *clk;
+	struct clk *busclk;		/* for pcie bus, actually the PLLB */
+	void *private_data[1];
+	spinlock_t lock;
+};
+
+static struct oxnas_pcie_shared pcie_shared = {
+	.refcount = 0,
+};
+
+static inline struct oxnas_pcie *sys_to_pcie(struct pci_sys_data *sys)
+{
+	return sys->private_data;
+}
+
+
+static inline void set_out_lanes(struct oxnas_pcie *pcie, unsigned lanes)
+{
+	regmap_update_bits(pcie->sys_ctrl, pcie->outbound_offset + PCIE_AHB_SLAVE_CTRL,
+				  PCIE_SLAVE_BE_MASK, PCIE_SLAVE_BE(lanes));
+	wmb();
+}
+
+static int oxnas_pcie_link_up(struct oxnas_pcie *pcie)
+{
+	unsigned long end;
+	unsigned int val;
+
+	/* Poll for PCIE link up */
+	end = jiffies + (LINK_UP_TIMEOUT_SECONDS * HZ);
+	while (!time_after(jiffies, end)) {
+		regmap_read(pcie->sys_ctrl, pcie->pcie_ctrl_offset, &val);
+		if (val & PCIE_LINK_UP)
+			return 1;
+	}
+	return 0;
+}
+
+static void oxnas_pcie_setup_hw(struct oxnas_pcie *pcie)
+{
+	/* We won't have any inbound address translation. This allows PCI
+	 * devices to access anywhere in the AHB address map. Might be regarded
+	 * as a bit dangerous, but let's get things working before we worry
+	 * about that
+	 */
+	oxnas_register_clear_mask(pcie->inbound + IB_ADDR_XLATE_ENABLE,
+				  ENABLE_IN_ADDR_TRANS);
+	wmb();
+
+	/*
+	 * Program outbound translation windows
+	 *
+	 * Outbound window is what is referred to as "PCI client" region in HRM
+	 *
+	 * Could use the larger alternative address space to get >>64M regions
+	 * for graphics cards etc., but will not bother at this point.
+	 *
+	 * IP bug means that AMBA window size must be a power of 2
+	 *
+	 * Set mem0 window for first 16MB of outbound window non-prefetchable
+	 * Set mem1 window for second 16MB of outbound window prefetchable
+	 * Set io window for next 16MB of outbound window
+	 * Set cfg0 for final 1MB of outbound window
+	 *
+	 * Ignore mem1, cfg1 and msg windows for now as no obvious use cases for
+	 * 820 that would need them
+	 *
+	 * Probably ideally want no offset between mem0 window start as seen by
+	 * ARM and as seen on PCI bus and get Linux to assign memory regions to
+	 * PCI devices using the same "PCI client" region start address as seen
+	 * by ARM
+	 */
+
+	/* Set PCIeA mem0 region to be 1st 16MB of the 64MB PCIeA window */
+	regmap_write(pcie->sys_ctrl, pcie->outbound_offset + PCIE_IN0_MEM_ADDR, pcie->non_mem.start);
+	regmap_write(pcie->sys_ctrl, pcie->outbound_offset + PCIE_IN0_MEM_LIMIT, pcie->non_mem.end);
+	regmap_write(pcie->sys_ctrl, pcie->outbound_offset + PCIE_POM0_MEM_ADDR, pcie->non_mem.start);
+
+	/* Set PCIeA mem1 region to be 2nd 16MB of the 64MB PCIeA window */
+	regmap_write(pcie->sys_ctrl, pcie->outbound_offset + PCIE_IN1_MEM_ADDR, pcie->pre_mem.start);
+	regmap_write(pcie->sys_ctrl, pcie->outbound_offset + PCIE_IN1_MEM_LIMIT, pcie->pre_mem.end);
+	regmap_write(pcie->sys_ctrl, pcie->outbound_offset + PCIE_POM1_MEM_ADDR, pcie->pre_mem.start);
+
+	/* Set PCIeA io to be third 16M region of the 64MB PCIeA window*/
+	regmap_write(pcie->sys_ctrl, pcie->outbound_offset + PCIE_IN_IO_ADDR, pcie->io.start);
+	regmap_write(pcie->sys_ctrl, pcie->outbound_offset + PCIE_IN_IO_LIMIT, pcie->io.end);
+
+
+	/* Set PCIeA cgf0 to be last 16M region of the 64MB PCIeA window*/
+	regmap_write(pcie->sys_ctrl, pcie->outbound_offset + PCIE_IN_CFG0_ADDR, pcie->cfg.start);
+	regmap_write(pcie->sys_ctrl, pcie->outbound_offset + PCIE_IN_CFG0_LIMIT, pcie->cfg.end);
+	wmb();
+
+	/* Enable outbound address translation */
+	regmap_write_bits(pcie->sys_ctrl, pcie->pcie_ctrl_offset, PCIE_OBTRANS, PCIE_OBTRANS);
+	wmb();
+
+	/*
+	 * Program PCIe command register for core to:
+	 *  enable memory space
+	 *  enable bus master
+	 *  enable io
+	 */
+	writel_relaxed(7, pcie->base + PCI_CONFIG_COMMAND_STATUS);
+	/* which is which */
+	wmb();
+}
+
+static unsigned oxnas_pcie_cfg_to_offset(
+	struct pci_sys_data *sys,
+	unsigned char bus_number,
+	unsigned int devfn,
+	int where)
+{
+	unsigned int function = PCI_FUNC(devfn);
+	unsigned int slot = PCI_SLOT(devfn);
+	unsigned char bus_number_offset;
+
+	bus_number_offset = bus_number - sys->busnr;
+
+	/*
+	 * We'll assume for now that the offset, function, slot, bus encoding
+	 * should map onto linear, contiguous addresses in PCIe config space,
+	 * albeit that the majority will be unused as only slot 0 is valid for
+	 * any PCIe bus and most devices have only function 0
+	 *
+	 * Could be that PCIe in fact works by not encoding the slot number into
+	 * the config space address as it's known that only slot 0 is valid.
+	 * We'll have to experiment if/when we get a PCIe switch connected to
+	 * the PCIe host
+	 */
+	return (bus_number_offset << 20) | (slot << 15) | (function << 12) |
+		(where & ~3);
+}
+
+/* PCI configuration space write function */
+static int oxnas_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
+			      int where, int size, u32 val)
+{
+	unsigned long flags;
+	struct oxnas_pcie *pcie = sys_to_pcie(bus->sysdata);
+	unsigned offset;
+	u32 value;
+	u32 lanes;
+
+	/* Only a single device per bus for PCIe point-to-point links */
+	if (PCI_SLOT(devfn) > 0)
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	if (!pcie->haslink)
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	offset = oxnas_pcie_cfg_to_offset(bus->sysdata, bus->number, devfn,
+					  where);
+
+	value = val << (8 * (where & 3));
+	lanes = (0xf >> (4-size)) << (where & 3);
+	/* it race with mem and io write, but the possibility is low, normally
+	 * all config writes happens at driver initialize stage, wont interleave
+	 * with others.
+	 * and many pcie cards use dword (4bytes) access mem/io access only,
+	 * so not bother to copy that ugly work-around now. */
+	spin_lock_irqsave(&pcie->lock, flags);
+	set_out_lanes(pcie, lanes);
+	writel_relaxed(value, pcie->cfgbase + offset);
+	set_out_lanes(pcie, 0xf);
+	spin_unlock_irqrestore(&pcie->lock, flags);
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+/* PCI configuration space read function */
+static int oxnas_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
+			      int size, u32 *val)
+{
+	struct oxnas_pcie *pcie = sys_to_pcie(bus->sysdata);
+	unsigned offset;
+	u32 value;
+	u32 left_bytes, right_bytes;
+
+	/* Only a single device per bus for PCIe point-to-point links */
+	if (PCI_SLOT(devfn) > 0) {
+		*val = 0xffffffff;
+		return PCIBIOS_DEVICE_NOT_FOUND;
+	}
+
+	if (!pcie->haslink) {
+		*val = 0xffffffff;
+		return PCIBIOS_DEVICE_NOT_FOUND;
+	}
+
+	offset = oxnas_pcie_cfg_to_offset(bus->sysdata, bus->number, devfn,
+					  where);
+	value = readl_relaxed(pcie->cfgbase + offset);
+	left_bytes = where & 3;
+	right_bytes = 4 - left_bytes - size;
+	value <<= right_bytes * 8;
+	value >>= (left_bytes + right_bytes) * 8;
+	*val = value;
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops oxnas_pcie_ops = {
+	.read = oxnas_pcie_rd_conf,
+	.write = oxnas_pcie_wr_conf,
+};
+
+static int oxnas_pcie_setup(int nr, struct pci_sys_data *sys)
+{
+	struct oxnas_pcie *pcie = sys_to_pcie(sys);
+
+	pci_add_resource_offset(&sys->resources, &pcie->non_mem, sys->mem_offset);
+	pci_add_resource_offset(&sys->resources, &pcie->pre_mem, sys->mem_offset);
+	pci_add_resource_offset(&sys->resources, &pcie->io, sys->io_offset);
+	pci_add_resource(&sys->resources, &pcie->busn);
+	if (sys->busnr == 0) { /* default one */
+		sys->busnr = pcie->busn.start;
+	}
+	/* do not use devm_ioremap_resource, it does not like cfg resource */
+	pcie->cfgbase = devm_ioremap(&pcie->pdev->dev, pcie->cfg.start,
+				     resource_size(&pcie->cfg));
+	if (!pcie->cfgbase)
+		return -ENOMEM;
+
+	oxnas_pcie_setup_hw(pcie);
+
+	return 1;
+}
+
+static void oxnas_pcie_enable(struct device *dev, struct oxnas_pcie *pcie)
+{
+	struct hw_pci hw;
+	int i;
+
+	memset(&hw, 0, sizeof(hw));
+	for (i = 0; i < NUM_CONTROLLERS; i++)
+		pcie->private_data[i] = pcie;
+
+	hw.nr_controllers = NUM_CONTROLLERS;
+/* I think use stack pointer is a bad idea though it is valid in this case */
+	hw.private_data   = pcie->private_data;
+	hw.setup          = oxnas_pcie_setup;
+	hw.map_irq        = of_irq_parse_and_map_pci;
+	hw.ops            = &oxnas_pcie_ops;
+
+	/* pass dev to maintain of tree, interrupt mapping rely on this */
+	pci_common_init_dev(dev, &hw);
+}
+
+static int oxnas_pcie_shared_init(struct platform_device *pdev, struct oxnas_pcie *pcie)
+{
+	if (++pcie_shared.refcount == 1) {
+		phy_init(pcie->phy);
+		phy_power_on(pcie->phy);
+		return 0;
+	} else {
+		return 0;
+	}
+}
+
+#if 0
+/* maybe we will call it when enter low power state */
+static void oxnas_pcie_shared_deinit(struct platform_device *pdev)
+{
+	if (--pcie_shared.refcount == 0) {
+		/* no cleanup needed */;
+	}
+}
+#endif
+
+static int
+oxnas_pcie_map_registers(struct platform_device *pdev,
+			 struct device_node *np,
+			 struct oxnas_pcie *pcie)
+{
+	struct resource regs;
+	int ret = 0;
+	u32 outbound_ctrl_offset;
+	u32 pcie_ctrl_offset;
+
+	ret = of_address_to_resource(np, 0, &regs);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to parse base register space\n");
+		return -EINVAL;
+	}
+
+	pcie->base = devm_ioremap_resource(&pdev->dev, &regs);
+	if (!pcie->base) {
+		dev_err(&pdev->dev, "failed to map base register space\n");
+		return -ENOMEM;
+	}
+
+	ret = of_address_to_resource(np, 1, &regs);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to parse inbound register space\n");
+		return -EINVAL;
+	}
+
+	pcie->inbound = devm_ioremap_resource(&pdev->dev, &regs);
+	if (!pcie->inbound) {
+		dev_err(&pdev->dev, "failed to map inbound register space\n");
+		return -ENOMEM;
+	}
+
+	pcie->phy = devm_of_phy_get(&pdev->dev, np, NULL);
+	if (IS_ERR(pcie->phy)) {
+		if (PTR_ERR(pcie->phy) == -EPROBE_DEFER) {
+			dev_err(&pdev->dev, "failed to probe phy\n");
+			return PTR_ERR(pcie->phy);
+		}
+		dev_warn(&pdev->dev, "phy not attached\n");
+		pcie->phy = NULL;
+	}
+
+	if (of_property_read_u32(np, "plxtech,pcie-outbound-offset",
+				 &outbound_ctrl_offset)) {
+		dev_err(&pdev->dev, "failed to parse outbound register offset\n");
+		return -EINVAL;
+	}
+	pcie->outbound_offset = outbound_ctrl_offset;
+
+	if (of_property_read_u32(np, "plxtech,pcie-ctrl-offset",
+				 &pcie_ctrl_offset)) {
+		dev_err(&pdev->dev, "failed to parse pcie-ctrl register offset\n");
+		return -EINVAL;
+	}
+	pcie->pcie_ctrl_offset = pcie_ctrl_offset;
+
+	return 0;
+}
+
+static int oxnas_pcie_init_res(struct platform_device *pdev,
+				      struct oxnas_pcie *pcie,
+				      struct device_node *np)
+{
+	struct of_pci_range range;
+	struct of_pci_range_parser parser;
+	int ret;
+
+	if (of_pci_range_parser_init(&parser, np))
+		return -EINVAL;
+
+	/* Get the I/O and memory ranges from DT */
+	for_each_of_pci_range(&parser, &range) {
+
+		unsigned long restype = range.flags & IORESOURCE_TYPE_BITS;
+		if (restype == IORESOURCE_IO) {
+			of_pci_range_to_resource(&range, np, &pcie->io);
+			pcie->io.name = "I/O";
+		}
+		if (restype == IORESOURCE_MEM) {
+			if (range.flags & IORESOURCE_PREFETCH) {
+				of_pci_range_to_resource(&range, np, &pcie->pre_mem);
+				pcie->pre_mem.name = "PRE MEM";
+			} else {
+				of_pci_range_to_resource(&range, np, &pcie->non_mem);
+				pcie->non_mem.name = "NON MEM";
+			}
+
+		}
+		if (restype == 0)
+			of_pci_range_to_resource(&range, np, &pcie->cfg);
+	}
+
+	/* Get the bus range */
+	ret = of_pci_parse_bus_range(np, &pcie->busn);
+
+	if (ret) {
+		dev_err(&pdev->dev, "failed to parse bus-range property: %d\n",
+			ret);
+		return ret;
+	}
+
+	pcie->card_reset = of_get_gpio(np, 0);
+	if (pcie->card_reset < 0)
+		dev_info(&pdev->dev, "card reset gpio pin not exists\n");
+
+	if (of_property_read_u32(np, "plxtech,pcie-hcsl-bit", &pcie->hcsl_en))
+		return -EINVAL;
+
+	pcie->clk = of_clk_get_by_name(np, "pcie");
+	if (IS_ERR(pcie->clk)) {
+		return PTR_ERR(pcie->clk);
+	}
+
+	pcie->busclk = of_clk_get_by_name(np, "busclk");
+	if (IS_ERR(pcie->busclk)) {
+		clk_put(pcie->clk);
+		return PTR_ERR(pcie->busclk);
+	}
+
+	return 0;
+}
+
+static void oxnas_pcie_init_hw(struct platform_device *pdev,
+			       struct oxnas_pcie *pcie)
+{
+	u32 version_id;
+	int ret;
+
+	clk_prepare_enable(pcie->busclk);
+
+	/* reset PCIe cards use hard-wired gpio pin */
+	if (pcie->card_reset >= 0 &&
+	    !gpio_direction_output(pcie->card_reset, 0)) {
+		wmb();
+		mdelay(10);
+		/* must tri-state the pin to pull it up */
+		gpio_direction_input(pcie->card_reset);
+		wmb();
+		mdelay(100);
+	}
+
+	/* ToDo: use phy power-on port... */
+	regmap_update_bits(pcie->sys_ctrl, SYS_CTRL_HCSL_CTRL_REGOFFSET,
+	                   BIT(pcie->hcsl_en), BIT(pcie->hcsl_en));
+
+	/* core */
+	ret = device_reset(&pdev->dev);
+	if (ret) {
+		dev_err(&pdev->dev, "core reset failed %d\n", ret);
+		return;
+	}
+
+	/* Start PCIe core clocks */
+	clk_prepare_enable(pcie->clk);
+
+	version_id = readl_relaxed(pcie->base + PCI_CONFIG_VERSION_DEVICEID);
+	dev_info(&pdev->dev, "PCIe version/deviceID 0x%x\n", version_id);
+
+	if (version_id != VERSION_ID_MAGIC) {
+		dev_info(&pdev->dev, "PCIe controller not found\n");
+		pcie->haslink = 0;
+		return;
+	}
+
+	/* allow entry to L23 state */
+	regmap_write_bits(pcie->sys_ctrl, pcie->pcie_ctrl_offset,
+	                  PCIE_READY_ENTR_L23, PCIE_READY_ENTR_L23);
+
+	/* Set PCIe core into RootCore mode */
+	regmap_write_bits(pcie->sys_ctrl, pcie->pcie_ctrl_offset,
+	                  PCIE_DEVICE_TYPE_MASK, PCIE_DEVICE_TYPE_ROOT);
+	wmb();
+
+	/* Bring up the PCI core */
+	regmap_write_bits(pcie->sys_ctrl, pcie->pcie_ctrl_offset,
+	                  PCIE_LTSSM, PCIE_LTSSM);
+	wmb();
+}
+
+static int oxnas_pcie_probe(struct platform_device *pdev)
+{
+	struct oxnas_pcie *pcie;
+	struct device_node *np = pdev->dev.of_node;
+	int ret;
+
+	pcie = devm_kzalloc(&pdev->dev, sizeof(struct oxnas_pcie),
+			    GFP_KERNEL);
+	if (!pcie)
+		return -ENOMEM;
+
+	pcie->pdev = pdev;
+	pcie->haslink = 1;
+	spin_lock_init(&pcie->lock);
+
+	pcie->sys_ctrl = syscon_regmap_lookup_by_compatible("oxsemi,ox820-sys-ctrl");
+	if (IS_ERR(pcie->sys_ctrl))
+		return PTR_ERR(pcie->sys_ctrl);
+
+	ret = oxnas_pcie_init_res(pdev, pcie, np);
+	if (ret)
+		return ret;
+	if (pcie->card_reset >= 0) {
+		ret = gpio_request_one(pcie->card_reset, GPIOF_DIR_IN,
+				       dev_name(&pdev->dev));
+		if (ret) {
+			dev_err(&pdev->dev, "cannot request gpio pin %d\n",
+				pcie->card_reset);
+			return ret;
+		}
+	}
+
+	ret = oxnas_pcie_map_registers(pdev, np, pcie);
+	if (ret) {
+		dev_err(&pdev->dev, "cannot map registers\n");
+		goto err_free_gpio;
+	}
+
+	ret = oxnas_pcie_shared_init(pdev, pcie);
+	if (ret)
+		goto err_free_gpio;
+
+	/* if hw not found, haslink cleared */
+	oxnas_pcie_init_hw(pdev, pcie);
+
+	if (pcie->haslink && oxnas_pcie_link_up(pcie)) {
+		pcie->haslink = 1;
+		dev_info(&pdev->dev, "link up\n");
+	} else {
+		pcie->haslink = 0;
+		dev_info(&pdev->dev, "link down\n");
+	}
+	/* should we register our controller even when pcie->haslink is 0 ? */
+	/* register the controller with framework */
+	oxnas_pcie_enable(&pdev->dev, pcie);
+
+	return 0;
+
+err_free_gpio:
+	if (pcie->card_reset)
+		gpio_free(pcie->card_reset);
+
+	return ret;
+}
+
+static const struct of_device_id oxnas_pcie_of_match_table[] = {
+	{ .compatible = "plxtech,nas782x-pcie", },
+	{},
+};
+
+static struct platform_driver oxnas_pcie_driver = {
+	.driver = {
+		.name = "oxnas-pcie",
+		.suppress_bind_attrs = true,
+		.of_match_table = oxnas_pcie_of_match_table,
+	},
+	.probe = oxnas_pcie_probe,
+};
+
+builtin_platform_driver(oxnas_pcie_driver);
diff --git a/target/linux/oxnas/files-5.4/drivers/phy/phy-oxnas-pcie.c b/target/linux/oxnas/files-5.4/drivers/phy/phy-oxnas-pcie.c
new file mode 100644
index 0000000000..6ded8b2cf6
--- /dev/null
+++ b/target/linux/oxnas/files-5.4/drivers/phy/phy-oxnas-pcie.c
@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019 Daniel Golle <daniel@makrotopia.org>
+ *
+ */
+
+#include <dt-bindings/phy/phy.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/mfd/syscon.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+
+#define ADDR_VAL(val)	((val) & 0xFFFF)
+#define DATA_VAL(val)	((val) & 0xFFFF)
+
+#define SYS_CTRL_HCSL_CTRL_REGOFFSET	0x114
+
+enum {
+	HCSL_BIAS_ON = BIT(0),
+	HCSL_PCIE_EN = BIT(1),
+	HCSL_PCIEA_EN = BIT(2),
+	HCSL_PCIEB_EN = BIT(3),
+};
+
+enum {
+	/* pcie phy reg offset */
+	PHY_ADDR = 0,
+	PHY_DATA = 4,
+	/* phy data reg bits */
+	READ_EN = BIT(16),
+	WRITE_EN = BIT(17),
+	CAP_DATA = BIT(18),
+};
+
+struct oxnas_pcie_phy {
+	struct device *dev;
+	void __iomem *membase;
+	const struct phy_ops *ops;
+	struct regmap *sys_ctrl;
+	struct reset_control *rstc;
+};
+
+static int oxnas_pcie_phy_init(struct phy *phy)
+{
+	struct oxnas_pcie_phy *pciephy = phy_get_drvdata(phy);
+	int ret;
+
+	/* generate clocks from HCSL buffers, shared parts */
+	regmap_write(pciephy->sys_ctrl, SYS_CTRL_HCSL_CTRL_REGOFFSET, HCSL_BIAS_ON|HCSL_PCIE_EN);
+
+	/* Ensure PCIe PHY is properly reset */
+	ret = reset_control_reset(pciephy->rstc);
+
+	if (ret) {
+		dev_err(pciephy->dev, "phy reset failed %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int oxnas_pcie_phy_power_on(struct phy *phy)
+{
+	struct oxnas_pcie_phy *pciephy = phy_get_drvdata(phy);
+
+	/* Enable PCIe Pre-Emphasis: What these value means? */
+	writel(ADDR_VAL(0x0014), pciephy->membase + PHY_ADDR);
+	writel(DATA_VAL(0xce10) | CAP_DATA, pciephy->membase + PHY_DATA);
+	writel(DATA_VAL(0xce10) | WRITE_EN, pciephy->membase + PHY_DATA);
+
+	writel(ADDR_VAL(0x2004), pciephy->membase + PHY_ADDR);
+	writel(DATA_VAL(0x82c7) | CAP_DATA, pciephy->membase + PHY_DATA);
+	writel(DATA_VAL(0x82c7) | WRITE_EN, pciephy->membase + PHY_DATA);
+
+	return 0;
+}
+
+static const struct phy_ops ops = {
+	.init           = oxnas_pcie_phy_init,
+	.power_on       = oxnas_pcie_phy_power_on,
+	.owner          = THIS_MODULE,
+};
+
+static int oxnas_pcie_phy_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = pdev->dev.of_node;
+	struct phy *generic_phy;
+	struct phy_provider *phy_provider;
+	struct oxnas_pcie_phy *pciephy;
+	struct regmap *sys_ctrl;
+	struct reset_control *rstc;
+	void __iomem *membase;
+
+	membase = of_iomap(np, 0);
+	if (IS_ERR(membase))
+		return PTR_ERR(membase);
+
+	sys_ctrl = syscon_regmap_lookup_by_compatible("oxsemi,ox820-sys-ctrl");
+	if (IS_ERR(sys_ctrl))
+		return PTR_ERR(sys_ctrl);
+
+	rstc = devm_reset_control_get_shared(dev, "phy");
+	if (IS_ERR(rstc))
+		return PTR_ERR(rstc);
+
+	pciephy = devm_kzalloc(dev, sizeof(*pciephy), GFP_KERNEL);
+	if (!pciephy)
+		return -ENOMEM;
+
+	pciephy->sys_ctrl = sys_ctrl;
+	pciephy->rstc = rstc;
+	pciephy->membase = membase;
+	pciephy->dev = dev;
+	pciephy->ops = &ops;
+
+	generic_phy = devm_phy_create(dev, dev->of_node, pciephy->ops);
+	if (IS_ERR(generic_phy)) {
+		dev_err(dev, "failed to create PHY\n");
+		return PTR_ERR(generic_phy);
+	}
+
+	phy_set_drvdata(generic_phy, pciephy);
+	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+
+	return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static const struct of_device_id oxnas_pcie_phy_id_table[] = {
+	{ .compatible = "oxsemi,ox820-pcie-phy" },
+	{ },
+};
+
+static struct platform_driver oxnas_pcie_phy_driver = {
+	.probe		= oxnas_pcie_phy_probe,
+	.driver		= {
+		.name		= "ox820-pcie-phy",
+		.of_match_table	= oxnas_pcie_phy_id_table,
+	},
+};
+
+builtin_platform_driver(oxnas_pcie_phy_driver);
diff --git a/target/linux/oxnas/files/arch/arm/boot/dts/ox820-shuttle-kd20.dts b/target/linux/oxnas/files/arch/arm/boot/dts/ox820-shuttle-kd20.dts
index a8a2ec3bc7..61ea2b57a7 100644
--- a/target/linux/oxnas/files/arch/arm/boot/dts/ox820-shuttle-kd20.dts
+++ b/target/linux/oxnas/files/arch/arm/boot/dts/ox820-shuttle-kd20.dts
@@ -2,6 +2,7 @@
 
 #include "ox820.dtsi"
 
+#include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
 
 / {
@@ -31,7 +32,8 @@
 
 	i2c-gpio {
 		compatible = "i2c-gpio";
-		gpios = <&gpio1 9 0 &gpio1 10 0>;
+		sda-gpios = <&gpio1 9 (GPIO_ACTIVE_HIGH|GPIO_LINE_OPEN_DRAIN)>;
+		sck-gpios = <&gpio1 10 (GPIO_ACTIVE_HIGH|GPIO_LINE_OPEN_DRAIN)>;
 		i2c-gpio,delay-us = <10>;
 		#address-cells = <1>;
 		#size-cells = <0>;
@@ -49,22 +51,22 @@
 
 		power {
 			label = "power";
-			gpios = <&gpio0 10 1>;
+			gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_POWER>;
 		};
 		reset {
 			label = "reset";
-			gpios = <&gpio0 11 1>;
+			gpios = <&gpio0 11 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_RESTART>;
 		};
 		eject1 {
 			label = "eject1";
-			gpios = <&gpio0 5 1>;
+			gpios = <&gpio0 5 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_EJECTCD>;
 		};
 		eject2 {
 			label = "eject2";
-			gpios = <&gpio0 6 1>;
+			gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
 			linux,code = <162>;
 		};
 	};
@@ -73,33 +75,33 @@
 		compatible = "gpio-leds";
 		led_status: status {
 			label = "kd20:blue:status";
-			gpios = <&gpio1 16 0>;
+			gpios = <&gpio1 16 GPIO_ACTIVE_HIGH>;
 		};
 		led_warn: status2 {
 			label = "kd20:red:status";
-			gpios = <&gpio1 17 0>;
+			gpios = <&gpio1 17 GPIO_ACTIVE_HIGH>;
 		};
 		hdd1blue {
 			label = "kd20:blue:hdd1";
-			gpios = <&gpio0 27 0>;
+			gpios = <&gpio0 27 GPIO_ACTIVE_HIGH>;
 			linux,default-trigger = "ata1";
 		};
 		hdd1red {
 			label = "kd20:red:hdd1";
-			gpios = <&gpio1 4 0>;
+			gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>;
 		};
 		hdd2blue {
 			label = "kd20:blue:hdd2";
-			gpios = <&gpio1 6 0>;
+			gpios = <&gpio1 6 GPIO_ACTIVE_HIGH>;
 			linux,default-trigger = "ata2";
 		};
 		hdd2red {
 			label = "kd20:red:hdd2";
-			gpios = <&gpio1 7 0>;
+			gpios = <&gpio1 7 GPIO_ACTIVE_HIGH>;
 		};
 		usb {
 			label = "kd20:blue:usb";
-			gpios = <&gpio1 8 0>;
+			gpios = <&gpio1 8 GPIO_ACTIVE_HIGH>;
 			trigger-sources = <&ehci_port1>, <&ehci_port2>;
 			linux,default-trigger = "usbport";
 		};
@@ -107,19 +109,19 @@
 
 	beeper: beeper {
 		compatible = "gpio-beeper";
-		gpios = <&gpio1 11 0>;
+		gpios = <&gpio1 11 GPIO_ACTIVE_HIGH>;
 	};
 
 	gpio-fan {
 		compatible = "gpio-fan";
-		gpios = <&gpio0 2 1>;
+		gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
 		gpio-fan,speed-map = <0    0
 				      3000 1>;
 	};
 
 	gpio-poweroff {
 		compatible = "gpio-poweroff";
-		gpios = <&gpio0 9 0>;
+		gpios = <&gpio0 9 GPIO_ACTIVE_HIGH>;
 	};
 };
 
diff --git a/target/linux/oxnas/ox820/config-default b/target/linux/oxnas/ox820/config-default
index 47cd89d0d2..ed757730ee 100644
--- a/target/linux/oxnas/ox820/config-default
+++ b/target/linux/oxnas/ox820/config-default
@@ -88,6 +88,7 @@ CONFIG_PCI_MSI_IRQ_DOMAIN=y
 # CONFIG_MTD_CFI is not set
 CONFIG_MTD_CMDLINE_PARTS=y
 # CONFIG_MTD_COMPLEX_MAPPINGS is not set
+CONFIG_MTD_RAW_NAND=y
 CONFIG_MTD_NAND=y
 CONFIG_MTD_NAND_ECC=y
 CONFIG_MTD_NAND_OXNAS=y
diff --git a/target/linux/oxnas/patches-4.14/340-oxnas-pcie.patch b/target/linux/oxnas/patches-4.14/340-oxnas-pcie.patch
index a6b7137584..2a4e4536dc 100644
--- a/target/linux/oxnas/patches-4.14/340-oxnas-pcie.patch
+++ b/target/linux/oxnas/patches-4.14/340-oxnas-pcie.patch
@@ -1,5 +1,5 @@
---- a/drivers/pci/host/Kconfig
-+++ b/drivers/pci/host/Kconfig
+--- a/drivers/pci/controller/Kconfig
++++ b/drivers/pci/controller/Kconfig
 @@ -220,4 +220,9 @@ config VMD
  	  To compile this driver as a module, choose M here: the
  	  module will be called vmd.
@@ -10,8 +10,8 @@
 +	select PCIEPORTBUS
 +
  endmenu
---- a/drivers/pci/host/Makefile
-+++ b/drivers/pci/host/Makefile
+--- a/drivers/pci/controller/Makefile
++++ b/drivers/pci/controller/Makefile
 @@ -20,6 +20,7 @@ obj-$(CONFIG_PCIE_ALTERA) += pcie-altera
  obj-$(CONFIG_PCIE_ALTERA_MSI) += pcie-altera-msi.o
  obj-$(CONFIG_PCIE_ROCKCHIP) += pcie-rockchip.o
diff --git a/target/linux/oxnas/patches-5.4/010-add-console-to-pogoplogv3-bootargs.patch b/target/linux/oxnas/patches-5.4/010-add-console-to-pogoplogv3-bootargs.patch
new file mode 100644
index 0000000000..7fdc302a3f
--- /dev/null
+++ b/target/linux/oxnas/patches-5.4/010-add-console-to-pogoplogv3-bootargs.patch
@@ -0,0 +1,11 @@
+--- a/arch/arm/boot/dts/ox820-cloudengines-pogoplug-series-3.dts
++++ b/arch/arm/boot/dts/ox820-cloudengines-pogoplug-series-3.dts
+@@ -14,7 +14,7 @@
+ 	compatible = "cloudengines,pogoplugv3", "oxsemi,ox820";
+ 
+ 	chosen {
+-		bootargs = "earlyprintk";
++		bootargs = "earlyprintk console=ttyS0,115200";
+ 		stdout-path = "serial0:115200n8";
+ 	};
+ 
diff --git a/target/linux/oxnas/patches-5.4/020-nand-partitions-on-pogoplug-v3.patch b/target/linux/oxnas/patches-5.4/020-nand-partitions-on-pogoplug-v3.patch
new file mode 100644
index 0000000000..4adf8bcd01
--- /dev/null
+++ b/target/linux/oxnas/patches-5.4/020-nand-partitions-on-pogoplug-v3.patch
@@ -0,0 +1,32 @@
+--- a/arch/arm/boot/dts/ox820-cloudengines-pogoplug-series-3.dts
++++ b/arch/arm/boot/dts/ox820-cloudengines-pogoplug-series-3.dts
+@@ -73,11 +73,27 @@
+ 		nand-ecc-algo = "hamming";
+ 
+ 		partition@0 {
+-			label = "boot";
+-			reg = <0x00000000 0x00e00000>;
++			label = "stage1";
++			reg = <0x00000000 0x00040000>;
+ 			read-only;
+ 		};
+ 
++		partition@40000 {
++			label = "u-boot";
++			reg = <0x00040000 0x00380000>;
++			read-only;
++		};
++
++		partition@3c0000 {
++			label = "u-boot-env";
++			reg = <0x003c0000 0x00080000>;
++		};
++
++		partition@440000 {
++			label = "kernel";
++			reg = <0x00440000 0x009c0000>;
++		};
++
+ 		partition@e00000 {
+ 			label = "ubi";
+ 			reg = <0x00e00000 0x07200000>;
diff --git a/target/linux/oxnas/patches-5.4/030-led-aliases-on-pogoplug-v3.patch b/target/linux/oxnas/patches-5.4/030-led-aliases-on-pogoplug-v3.patch
new file mode 100644
index 0000000000..8fb1d23088
--- /dev/null
+++ b/target/linux/oxnas/patches-5.4/030-led-aliases-on-pogoplug-v3.patch
@@ -0,0 +1,34 @@
+--- a/arch/arm/boot/dts/ox820-cloudengines-pogoplug-series-3.dts
++++ b/arch/arm/boot/dts/ox820-cloudengines-pogoplug-series-3.dts
+@@ -27,24 +27,28 @@
+ 		serial0 = &uart0;
+ 		gpio0 = &gpio0;
+ 		gpio1 = &gpio1;
++		led-boot = &led_status;
++		led-failsafe = &led_warn;
++		led-running = &led_act;
++		led-upgrade = &led_warn;
+ 	};
+ 
+ 	leds {
+ 		compatible = "gpio-leds";
+ 
+-		blue {
++		led_status: blue {
+ 			label = "pogoplug:blue";
+ 			gpios = <&gpio0 2 0>;
+ 			default-state = "keep";
+ 		};
+ 
+-		orange {
++		led_warn: orange {
+ 			label = "pogoplug:orange";
+ 			gpios = <&gpio1 16 1>;
+ 			default-state = "keep";
+ 		};
+ 
+-		green {
++		led_act: green {
+ 			label = "pogoplug:green";
+ 			gpios = <&gpio1 17 1>;
+ 			default-state = "keep";
diff --git a/target/linux/oxnas/patches-5.4/040-pogoplug-series-3-compatible-string.patch b/target/linux/oxnas/patches-5.4/040-pogoplug-series-3-compatible-string.patch
new file mode 100644
index 0000000000..625d660e0e
--- /dev/null
+++ b/target/linux/oxnas/patches-5.4/040-pogoplug-series-3-compatible-string.patch
@@ -0,0 +1,11 @@
+--- a/arch/arm/boot/dts/ox820-cloudengines-pogoplug-series-3.dts
++++ b/arch/arm/boot/dts/ox820-cloudengines-pogoplug-series-3.dts
+@@ -11,7 +11,7 @@
+ / {
+ 	model = "Cloud Engines PogoPlug Series 3";
+ 
+-	compatible = "cloudengines,pogoplugv3", "oxsemi,ox820";
++	compatible = "cloudengines,pogoplug-series-3", "cloudengines,pogoplugv3", "oxsemi,ox820";
+ 
+ 	chosen {
+ 		bootargs = "earlyprintk console=ttyS0,115200";
diff --git a/target/linux/oxnas/patches-5.4/050-ox820-remove-left-overs.patch b/target/linux/oxnas/patches-5.4/050-ox820-remove-left-overs.patch
new file mode 100644
index 0000000000..e30f328792
--- /dev/null
+++ b/target/linux/oxnas/patches-5.4/050-ox820-remove-left-overs.patch
@@ -0,0 +1,63 @@
+From 552ed4955c1fee1109bf5ba137dc35a411a1448c Mon Sep 17 00:00:00 2001
+From: Daniel Golle <daniel@makrotopia.org>
+Date: Fri, 1 Jun 2018 02:41:15 +0200
+Subject: [PATCH] arm: ox820: remove left-overs
+
+Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+---
+ drivers/clk/clk-oxnas.c                  |  2 --
+ include/dt-bindings/clock/oxsemi,ox820.h | 32 +++++++++++-------------
+ 2 files changed, 14 insertions(+), 20 deletions(-)
+
+--- a/drivers/clk/clk-oxnas.c
++++ b/drivers/clk/clk-oxnas.c
+@@ -29,8 +29,6 @@ struct oxnas_stdclk_data {
+ 	struct clk_hw_onecell_data *onecell_data;
+ 	struct clk_oxnas_gate **gates;
+ 	unsigned int ngates;
+-	struct clk_oxnas_pll **plls;
+-	unsigned int nplls;
+ };
+ 
+ /* Regmap offsets */
+--- a/include/dt-bindings/clock/oxsemi,ox820.h
++++ b/include/dt-bindings/clock/oxsemi,ox820.h
+@@ -6,24 +6,20 @@
+ #ifndef DT_CLOCK_OXSEMI_OX820_H
+ #define DT_CLOCK_OXSEMI_OX820_H
+ 
+-/* PLLs */
+-#define CLK_820_PLLA		0
+-#define CLK_820_PLLB		1
+-
+ /* Gate Clocks */
+-#define CLK_820_LEON		2
+-#define CLK_820_DMA_SGDMA	3
+-#define CLK_820_CIPHER		4
+-#define CLK_820_SD		5
+-#define CLK_820_SATA		6
+-#define CLK_820_AUDIO		7
+-#define CLK_820_USBMPH		8
+-#define CLK_820_ETHA		9
+-#define CLK_820_PCIEA		10
+-#define CLK_820_NAND		11
+-#define CLK_820_PCIEB		12
+-#define CLK_820_ETHB		13
+-#define CLK_820_REF600		14
+-#define CLK_820_USBDEV		15
++#define CLK_820_LEON		0
++#define CLK_820_DMA_SGDMA	1
++#define CLK_820_CIPHER		2
++#define CLK_820_SD		3
++#define CLK_820_SATA		4
++#define CLK_820_AUDIO		5
++#define CLK_820_USBMPH		6
++#define CLK_820_ETHA		7
++#define CLK_820_PCIEA		8
++#define CLK_820_NAND		9
++#define CLK_820_PCIEB		10
++#define CLK_820_ETHB		11
++#define CLK_820_REF600		12
++#define CLK_820_USBDEV		13
+ 
+ #endif /* DT_CLOCK_OXSEMI_OX820_H */
diff --git a/target/linux/oxnas/patches-5.4/100-oxnas-clk-plla-pllb.patch b/target/linux/oxnas/patches-5.4/100-oxnas-clk-plla-pllb.patch
new file mode 100644
index 0000000000..29a9036498
--- /dev/null
+++ b/target/linux/oxnas/patches-5.4/100-oxnas-clk-plla-pllb.patch
@@ -0,0 +1,273 @@
+--- a/drivers/clk/clk-oxnas.c
++++ b/drivers/clk/clk-oxnas.c
+@@ -5,19 +5,42 @@
+  * Copyright (C) 2016 Neil Armstrong <narmstrong@baylibre.com>
+  */
+ 
++#include <linux/clk.h>
++#include <linux/clkdev.h>
+ #include <linux/clk-provider.h>
+ #include <linux/kernel.h>
+ #include <linux/init.h>
++#include <linux/delay.h>
+ #include <linux/of.h>
+ #include <linux/of_device.h>
+ #include <linux/platform_device.h>
+ #include <linux/stringify.h>
+ #include <linux/regmap.h>
+ #include <linux/mfd/syscon.h>
++#include <linux/reset.h>
+ 
+ #include <dt-bindings/clock/oxsemi,ox810se.h>
+ #include <dt-bindings/clock/oxsemi,ox820.h>
+ 
++#define REF300_DIV_INT_SHIFT		8
++#define REF300_DIV_FRAC_SHIFT		0
++#define REF300_DIV_INT(val)		((val) << REF300_DIV_INT_SHIFT)
++#define REF300_DIV_FRAC(val)		((val) << REF300_DIV_FRAC_SHIFT)
++
++#define PLLB_BYPASS			1
++#define PLLB_ENSAT			3
++#define PLLB_OUTDIV			4
++#define PLLB_REFDIV			8
++#define PLLB_DIV_INT_SHIFT		8
++#define PLLB_DIV_FRAC_SHIFT		0
++#define PLLB_DIV_INT(val)		((val) << PLLB_DIV_INT_SHIFT)
++#define PLLB_DIV_FRAC(val)		((val) << PLLB_DIV_FRAC_SHIFT)
++
++#define PLLA_REFDIV_MASK		0x3F
++#define PLLA_REFDIV_SHIFT		8
++#define PLLA_OUTDIV_MASK		0x7
++#define PLLA_OUTDIV_SHIFT		4
++
+ /* Standard regmap gate clocks */
+ struct clk_oxnas_gate {
+ 	struct clk_hw hw;
+@@ -36,6 +59,135 @@ struct oxnas_stdclk_data {
+ #define CLK_SET_REGOFFSET	0x2c
+ #define CLK_CLR_REGOFFSET	0x30
+ 
++#define PLLA_CTRL0_REGOFFSET	0x1f0
++#define PLLA_CTRL1_REGOFFSET	0x1f4
++#define PLLB_CTRL0_REGOFFSET	0x1001f0
++#define MHZ (1000 * 1000)
++
++struct clk_oxnas_pll {
++	struct clk_hw hw;
++	struct device_node *devnode;
++	struct reset_control *rstc;
++	struct regmap *syscon;
++};
++
++#define to_clk_oxnas_pll(_hw) container_of(_hw, struct clk_oxnas_pll, hw)
++
++static unsigned long plla_clk_recalc_rate(struct clk_hw *hw,
++	unsigned long parent_rate)
++{
++	struct clk_oxnas_pll *plla = to_clk_oxnas_pll(hw);
++	unsigned long fin = parent_rate;
++	unsigned long refdiv, outdiv;
++	unsigned int pll0, fbdiv;
++
++	BUG_ON(regmap_read(plla->syscon, PLLA_CTRL0_REGOFFSET, &pll0));
++
++	refdiv = (pll0 >> PLLA_REFDIV_SHIFT) & PLLA_REFDIV_MASK;
++	refdiv += 1;
++	outdiv = (pll0 >> PLLA_OUTDIV_SHIFT) & PLLA_OUTDIV_MASK;
++	outdiv += 1;
++
++	BUG_ON(regmap_read(plla->syscon, PLLA_CTRL1_REGOFFSET, &fbdiv));
++	/* seems we will not be here when pll is bypassed, so ignore this
++	 * case */
++
++	return fin / MHZ * fbdiv / (refdiv * outdiv) / 32768 * MHZ;
++}
++
++static const char *pll_clk_parents[] = {
++	"oscillator",
++};
++
++static struct clk_ops plla_ops = {
++	.recalc_rate = plla_clk_recalc_rate,
++};
++
++static struct clk_init_data clk_plla_init = {
++	.name = "plla",
++	.ops = &plla_ops,
++	.parent_names = pll_clk_parents,
++	.num_parents = ARRAY_SIZE(pll_clk_parents),
++};
++
++static int pllb_clk_is_prepared(struct clk_hw *hw)
++{
++	struct clk_oxnas_pll *pllb = to_clk_oxnas_pll(hw);
++
++	return !!pllb->rstc;
++}
++
++static int pllb_clk_prepare(struct clk_hw *hw)
++{
++	struct clk_oxnas_pll *pllb = to_clk_oxnas_pll(hw);
++
++	pllb->rstc = of_reset_control_get(pllb->devnode, NULL);
++
++	return IS_ERR(pllb->rstc) ? PTR_ERR(pllb->rstc) : 0;
++}
++
++static void pllb_clk_unprepare(struct clk_hw *hw)
++{
++	struct clk_oxnas_pll *pllb = to_clk_oxnas_pll(hw);
++
++	BUG_ON(IS_ERR(pllb->rstc));
++
++	reset_control_put(pllb->rstc);
++	pllb->rstc = NULL;
++}
++
++static int pllb_clk_enable(struct clk_hw *hw)
++{
++	struct clk_oxnas_pll *pllb = to_clk_oxnas_pll(hw);
++
++	BUG_ON(IS_ERR(pllb->rstc));
++
++	/* put PLL into bypass */
++	regmap_update_bits(pllb->syscon, PLLB_CTRL0_REGOFFSET, BIT(PLLB_BYPASS), BIT(PLLB_BYPASS));
++	wmb();
++	udelay(10);
++	reset_control_assert(pllb->rstc);
++	udelay(10);
++	/* set PLL B control information */
++	regmap_write_bits(pllb->syscon, PLLB_CTRL0_REGOFFSET, 0xffff,
++			  (1 << PLLB_ENSAT) | (1 << PLLB_OUTDIV) | (2 << PLLB_REFDIV));
++	reset_control_deassert(pllb->rstc);
++	udelay(100);
++	regmap_update_bits(pllb->syscon, PLLB_CTRL0_REGOFFSET, BIT(PLLB_BYPASS), 0);
++
++	return 0;
++}
++
++static void pllb_clk_disable(struct clk_hw *hw)
++{
++	struct clk_oxnas_pll *pllb = to_clk_oxnas_pll(hw);
++
++	BUG_ON(IS_ERR(pllb->rstc));
++
++	/* put PLL into bypass */
++	regmap_update_bits(pllb->syscon, PLLB_CTRL0_REGOFFSET, BIT(PLLB_BYPASS), BIT(PLLB_BYPASS));
++
++	wmb();
++	udelay(10);
++
++	reset_control_assert(pllb->rstc);
++}
++
++static struct clk_ops pllb_ops = {
++	.prepare = pllb_clk_prepare,
++	.unprepare = pllb_clk_unprepare,
++	.is_prepared = pllb_clk_is_prepared,
++	.enable = pllb_clk_enable,
++	.disable = pllb_clk_disable,
++};
++
++static struct clk_init_data clk_pllb_init = {
++	.name = "pllb",
++	.ops = &pllb_ops,
++	.parent_names = pll_clk_parents,
++	.num_parents = ARRAY_SIZE(pll_clk_parents),
++};
++
+ static inline struct clk_oxnas_gate *to_clk_oxnas_gate(struct clk_hw *hw)
+ {
+ 	return container_of(hw, struct clk_oxnas_gate, hw);
+@@ -249,3 +401,42 @@ static struct platform_driver oxnas_stdc
+ 	},
+ };
+ builtin_platform_driver(oxnas_stdclk_driver);
++
++void __init oxnas_init_plla(struct device_node *np)
++{
++	struct clk *clk;
++	struct clk_oxnas_pll *plla;
++
++	plla = kmalloc(sizeof(*plla), GFP_KERNEL);
++	BUG_ON(!plla);
++
++	plla->syscon = syscon_node_to_regmap(of_get_parent(np));
++	plla->hw.init = &clk_plla_init;
++	plla->devnode = np;
++	plla->rstc = NULL;
++	clk = clk_register(NULL, &plla->hw);
++	BUG_ON(IS_ERR(clk));
++	/* mark it as enabled */
++	clk_prepare_enable(clk);
++	of_clk_add_provider(np, of_clk_src_simple_get, clk);
++}
++CLK_OF_DECLARE(oxnas_plla, "plxtech,nas782x-plla", oxnas_init_plla);
++
++void __init oxnas_init_pllb(struct device_node *np)
++{
++	struct clk *clk;
++	struct clk_oxnas_pll *pllb;
++
++	pllb = kmalloc(sizeof(*pllb), GFP_KERNEL);
++	BUG_ON(!pllb);
++
++	pllb->syscon = syscon_node_to_regmap(of_get_parent(np));
++	pllb->hw.init = &clk_pllb_init;
++	pllb->devnode = np;
++	pllb->rstc = NULL;
++
++	clk = clk_register(NULL, &pllb->hw);
++	BUG_ON(IS_ERR(clk));
++	of_clk_add_provider(np, of_clk_src_simple_get, clk);
++}
++CLK_OF_DECLARE(oxnas_pllb, "plxtech,nas782x-pllb", oxnas_init_pllb);
+--- a/arch/arm/boot/dts/ox820.dtsi
++++ b/arch/arm/boot/dts/ox820.dtsi
+@@ -61,12 +61,6 @@
+ 			clocks = <&osc>;
+ 		};
+ 
+-		plla: plla {
+-			compatible = "fixed-clock";
+-			#clock-cells = <0>;
+-			clock-frequency = <850000000>;
+-		};
+-
+ 		armclk: armclk {
+ 			compatible = "fixed-factor-clock";
+ 			#clock-cells = <0>;
+@@ -266,6 +260,19 @@
+ 					compatible = "oxsemi,ox820-stdclk", "oxsemi,ox810se-stdclk";
+ 					#clock-cells = <1>;
+ 				};
++
++				plla: plla {
++					compatible = "plxtech,nas782x-plla";
++					#clock-cells = <0>;
++					clocks = <&osc>;
++				};
++
++				pllb: pllb {
++					compatible = "plxtech,nas782x-pllb";
++					#clock-cells = <0>;
++					clocks = <&osc>;
++					resets = <&reset RESET_PLLB>;
++				};
+ 			};
+ 		};
+ 
+@@ -287,6 +294,13 @@
+ 				clocks = <&armclk>;
+ 			};
+ 
++			watchdog@620 {
++				compatible = "mpcore_wdt";
++				reg = <0x620 0x20>;
++				interrupts = <GIC_PPI 14 (GIC_CPU_MASK_RAW(3)|IRQ_TYPE_LEVEL_HIGH)>;
++				clocks = <&armclk>;
++			};
++
+ 			gic: gic@1000 {
+ 				compatible = "arm,arm11mp-gic";
+ 				interrupt-controller;
diff --git a/target/linux/oxnas/patches-5.4/150-oxnas-restart.patch b/target/linux/oxnas/patches-5.4/150-oxnas-restart.patch
new file mode 100644
index 0000000000..79fbd9cdbe
--- /dev/null
+++ b/target/linux/oxnas/patches-5.4/150-oxnas-restart.patch
@@ -0,0 +1,25 @@
+--- a/drivers/power/reset/Kconfig
++++ b/drivers/power/reset/Kconfig
+@@ -123,6 +123,12 @@ config POWER_RESET_OCELOT_RESET
+ 	help
+ 	  This driver supports restart for Microsemi Ocelot SoC.
+ 
++config POWER_RESET_OXNAS
++	bool "OXNAS SoC restart driver"
++	depends on ARCH_OXNAS
++	help
++	  Restart support for OXNAS boards.
++
+ config POWER_RESET_PIIX4_POWEROFF
+ 	tristate "Intel PIIX4 power-off driver"
+ 	depends on PCI
+--- a/drivers/power/reset/Makefile
++++ b/drivers/power/reset/Makefile
+@@ -11,6 +11,7 @@ obj-$(CONFIG_POWER_RESET_GPIO) += gpio-p
+ obj-$(CONFIG_POWER_RESET_GPIO_RESTART) += gpio-restart.o
+ obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o
+ obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o
++obj-$(CONFIG_POWER_RESET_OXNAS) += oxnas-restart.o
+ obj-$(CONFIG_POWER_RESET_QCOM_PON) += qcom-pon.o
+ obj-$(CONFIG_POWER_RESET_OCELOT_RESET) += ocelot-reset.o
+ obj-$(CONFIG_POWER_RESET_PIIX4_POWEROFF) += piix4-poweroff.o
diff --git a/target/linux/oxnas/patches-5.4/320-oxnas-phy-pcie.patch b/target/linux/oxnas/patches-5.4/320-oxnas-phy-pcie.patch
new file mode 100644
index 0000000000..cf272f76b7
--- /dev/null
+++ b/target/linux/oxnas/patches-5.4/320-oxnas-phy-pcie.patch
@@ -0,0 +1,44 @@
+--- a/arch/arm/boot/dts/ox820.dtsi
++++ b/arch/arm/boot/dts/ox820.dtsi
+@@ -247,6 +247,15 @@
+ 				};
+ 			};
+ 
++			pcie_phy: pcie-phy@a00000 {
++				compatible = "oxsemi,ox820-pcie-phy";
++				reg = <0xa00000 0x10>;
++				#phy-cells = <0>;
++				resets = <&reset RESET_PCIEPHY>;
++				reset-names = "phy";
++				status = "disabled";
++			};
++
+ 			sys: sys-ctrl@e00000 {
+ 				compatible = "oxsemi,ox820-sys-ctrl", "syscon", "simple-mfd";
+ 				reg = <0xe00000 0x200000>;
+--- a/drivers/phy/Kconfig
++++ b/drivers/phy/Kconfig
+@@ -35,6 +35,13 @@ config PHY_LPC18XX_USB_OTG
+ 	  This driver is need for USB0 support on LPC18xx/43xx and takes
+ 	  care of enabling and clock setup.
+ 
++config PHY_OXNAS
++	tristate "Oxford Semi. OX820 PCI-E PHY support"
++	depends on HAS_IOMEM && OF && (ARM || COMPILE_TEST)
++	select GENERIC_PHY
++	help
++	  This option enables support for OXNAS OX820 SoC PCIE PHY.
++
+ config PHY_PISTACHIO_USB
+ 	tristate "IMG Pistachio USB2.0 PHY driver"
+ 	depends on MACH_PISTACHIO
+--- a/drivers/phy/Makefile
++++ b/drivers/phy/Makefile
+@@ -6,6 +6,7 @@
+ obj-$(CONFIG_GENERIC_PHY)		+= phy-core.o
+ obj-$(CONFIG_GENERIC_PHY_MIPI_DPHY)	+= phy-core-mipi-dphy.o
+ obj-$(CONFIG_PHY_LPC18XX_USB_OTG)	+= phy-lpc18xx-usb-otg.o
++obj-$(CONFIG_PHY_OXNAS)			+= phy-oxnas-pcie.o
+ obj-$(CONFIG_PHY_XGENE)			+= phy-xgene.o
+ obj-$(CONFIG_PHY_PISTACHIO_USB)		+= phy-pistachio-usb.o
+ obj-$(CONFIG_ARCH_SUNXI)		+= allwinner/
diff --git a/target/linux/oxnas/patches-5.4/340-oxnas-pcie.patch b/target/linux/oxnas/patches-5.4/340-oxnas-pcie.patch
new file mode 100644
index 0000000000..19065233cf
--- /dev/null
+++ b/target/linux/oxnas/patches-5.4/340-oxnas-pcie.patch
@@ -0,0 +1,122 @@
+--- a/drivers/pci/controller/Kconfig
++++ b/drivers/pci/controller/Kconfig
+@@ -48,6 +48,11 @@ config PCIE_CADENCE_EP
+ 	  endpoint mode. This PCIe controller may be embedded into many
+ 	  different vendors SoCs.
+ 
++config PCIE_OXNAS
++	bool "PLX Oxnas PCIe controller"
++	depends on ARCH_OXNAS
++	select PCIEPORTBUS
++
+ endmenu
+ 
+ config PCIE_XILINX_NWL
+--- a/drivers/pci/controller/Makefile
++++ b/drivers/pci/controller/Makefile
+@@ -28,6 +28,7 @@ obj-$(CONFIG_PCIE_ROCKCHIP_EP) += pcie-r
+ obj-$(CONFIG_PCIE_ROCKCHIP_HOST) += pcie-rockchip-host.o
+ obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o
+ obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
++obj-$(CONFIG_PCIE_OXNAS) += pcie-oxnas.o
+ obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o
+ obj-$(CONFIG_VMD) += vmd.o
+ # pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW
+--- a/arch/arm/boot/dts/ox820.dtsi
++++ b/arch/arm/boot/dts/ox820.dtsi
+@@ -289,7 +289,7 @@
+ 			#address-cells = <1>;
+ 			#size-cells = <1>;
+ 			compatible = "simple-bus";
+-			ranges = <0 0x47000000 0x1000000>;
++			ranges = <0 0x47000000 0x2000>;
+ 
+ 			scu: scu@0 {
+ 				compatible = "arm,arm11mp-scu";
+@@ -318,5 +318,86 @@
+ 				      <0x100 0x500>;
+ 			};
+ 		};
++
++		pcie0: pcie-controller@47c00000 {
++			compatible = "plxtech,nas782x-pcie";
++			device_type = "pci";
++			#address-cells = <3>;
++			#size-cells = <2>;
++
++			/*		flag & space	bus address	host address	size */
++			ranges = <	0x82000000	0 0x48000000	0x48000000	0 0x2000000
++					0xC2000000	0 0x4A000000	0x4A000000	0 0x1E00000
++					0x81000000	0 0x4BE00000	0x4BE00000	0 0x0100000
++					0x80000000	0 0x4BF00000	0x4BF00000	0 0x0100000>;
++
++			bus-range = <0x00 0x7f>;
++
++			/*	cfg			inbound translator	*/
++			reg =	<0x47c00000 0x1000>,	<0x47d00000 0x100>;
++
++			phys = <&pcie_phy>;
++			phy-names = "pcie-phy";
++
++			#interrupt-cells = <1>;
++			/* wild card mask, match all bus address & interrupt specifier */
++			/* format: bus address mask, interrupt specifier mask */
++			/* each bit 1 means need match, 0 means ignored when match */
++			interrupt-map-mask = <0 0 0 0>;
++			/* format: a list of: bus address, interrupt specifier,
++			 * parent interrupt controller & specifier */
++			interrupt-map = <0 0 0 0 &gic 0 19 0x304>;
++			gpios = <&gpio1 12 0>;
++			clocks = <&stdclk CLK_820_PCIEA>, <&pllb>;
++			clock-names = "pcie", "busclk";
++			resets = <&reset RESET_PCIEA>;
++			reset-names = "pcie";
++
++			plxtech,pcie-hcsl-bit = <2>;
++			plxtech,pcie-ctrl-offset = <0x120>;
++			plxtech,pcie-outbound-offset = <0x138>;
++			status = "disabled";
++		};
++
++		pcie1: pcie-controller@47e00000 {
++			compatible = "plxtech,nas782x-pcie";
++			device_type = "pci";
++			#address-cells = <3>;
++			#size-cells = <2>;
++
++			/*		flag & space	bus address	host address	size */
++			ranges = <	0x82000000	0 0x4C000000	0x4C000000	0 0x2000000
++					0xC2000000	0 0x4E000000	0x4E000000	0 0x1E00000
++					0x81000000	0 0x4FE00000	0x4FE00000	0 0x0100000
++					0x80000000	0 0x4FF00000	0x4FF00000	0 0x0100000>;
++
++			bus-range = <0x80 0xff>;
++
++			/*	cfg			inbound translator	*/
++			reg =	<0x47e00000 0x1000>,	<0x47f00000 0x100>;
++
++			phys = <&pcie_phy>;
++			phy-names = "pcie-phy";
++
++			#interrupt-cells = <1>;
++			/* wild card mask, match all bus address & interrupt specifier */
++			/* format: bus address mask, interrupt specifier mask */
++			/* each bit 1 means need match, 0 means ignored when match */
++			interrupt-map-mask = <0 0 0 0>;
++			/* format: a list of: bus address, interrupt specifier,
++			 * parent interrupt controller & specifier */
++			interrupt-map = <0 0 0 0 &gic 0 20 0x304>;
++
++			/* gpios = <&gpio1 12 0>; */
++			clocks = <&stdclk CLK_820_PCIEB>, <&pllb>;
++			clock-names = "pcie", "busclk";
++			resets = <&reset RESET_PCIEB>;
++			reset-names = "pcie";
++
++			plxtech,pcie-hcsl-bit = <3>;
++			plxtech,pcie-ctrl-offset = <0x124>;
++			plxtech,pcie-outbound-offset = <0x174>;
++			status = "disabled";
++		};
+ 	};
+ };
diff --git a/target/linux/oxnas/patches-5.4/500-oxnas-sata.patch b/target/linux/oxnas/patches-5.4/500-oxnas-sata.patch
new file mode 100644
index 0000000000..ba0d0d79b4
--- /dev/null
+++ b/target/linux/oxnas/patches-5.4/500-oxnas-sata.patch
@@ -0,0 +1,49 @@
+--- a/drivers/ata/Kconfig
++++ b/drivers/ata/Kconfig
+@@ -508,6 +508,13 @@ config SATA_VITESSE
+ 
+ 	  If unsure, say N.
+ 
++config SATA_OXNAS
++	tristate "PLXTECH NAS782X SATA support"
++	help
++	  This option enables support for Nas782x Serial ATA controller.
++
++	  If unsure, say N.
++
+ comment "PATA SFF controllers with BMDMA"
+ 
+ config PATA_ALI
+--- a/drivers/ata/Makefile
++++ b/drivers/ata/Makefile
+@@ -46,6 +46,7 @@ obj-$(CONFIG_SATA_SVW)		+= sata_svw.o
+ obj-$(CONFIG_SATA_ULI)		+= sata_uli.o
+ obj-$(CONFIG_SATA_VIA)		+= sata_via.o
+ obj-$(CONFIG_SATA_VITESSE)	+= sata_vsc.o
++obj-$(CONFIG_SATA_OXNAS)	+= sata_oxnas.o
+ 
+ # SFF PATA w/ BMDMA
+ obj-$(CONFIG_PATA_ALI)		+= pata_ali.o
+--- a/arch/arm/boot/dts/ox820.dtsi
++++ b/arch/arm/boot/dts/ox820.dtsi
+@@ -399,5 +399,20 @@
+ 			plxtech,pcie-outbound-offset = <0x174>;
+ 			status = "disabled";
+ 		};
++
++		sata: sata@45900000 {
++			compatible = "plxtech,nas782x-sata";
++				/*	ports		dmactl		sgdma	*/
++			reg = <0x45900000 0x20000>, <0x459A0000 0x40>, <0x459B0000 0x20>,
++				/*	core		phy		descriptors (optional)	*/
++				<0x459E0000 0x2000>, <0x44900000 0x0C>, <0x50000000 0x1000>;
++			interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
++			clocks = <&stdclk CLK_820_SATA>;
++			resets = <&reset RESET_SATA>, <&reset RESET_SATA_LINK>, <&reset RESET_SATA_PHY>;
++			reset-names = "sata", "link", "phy";
++			nr-ports = <1>;
++			status = "disabled";
++		};
++
+ 	};
+ };
diff --git a/target/linux/oxnas/patches-5.4/510-ox820-libata-leds.patch b/target/linux/oxnas/patches-5.4/510-ox820-libata-leds.patch
new file mode 100644
index 0000000000..05ae9ba44b
--- /dev/null
+++ b/target/linux/oxnas/patches-5.4/510-ox820-libata-leds.patch
@@ -0,0 +1,10 @@
+--- a/arch/arm/mach-oxnas/Kconfig
++++ b/arch/arm/mach-oxnas/Kconfig
+@@ -2,6 +2,7 @@
+ menuconfig ARCH_OXNAS
+ 	bool "Oxford Semiconductor OXNAS Family SoCs"
+ 	select ARCH_HAS_RESET_CONTROLLER
++	select ARCH_WANT_LIBATA_LEDS
+ 	select COMMON_CLK_OXNAS
+ 	select GPIOLIB
+ 	select MFD_SYSCON
diff --git a/target/linux/oxnas/patches-5.4/800-oxnas-ehci.patch b/target/linux/oxnas/patches-5.4/800-oxnas-ehci.patch
new file mode 100644
index 0000000000..6c0f1cb109
--- /dev/null
+++ b/target/linux/oxnas/patches-5.4/800-oxnas-ehci.patch
@@ -0,0 +1,73 @@
+--- a/drivers/usb/host/Kconfig
++++ b/drivers/usb/host/Kconfig
+@@ -321,6 +321,13 @@ config USB_OCTEON_EHCI
+ 	  USB 2.0 device support.  All CN6XXX based chips with USB are
+ 	  supported.
+ 
++config USB_EHCI_OXNAS
++	tristate "OXNAS EHCI Module"
++	depends on USB_EHCI_HCD && ARCH_OXNAS
++	select USB_EHCI_ROOT_HUB_TT
++	---help---
++	  Enable support for the OX820 SOC's on-chip EHCI controller.
++
+ endif # USB_EHCI_HCD
+ 
+ config USB_OXU210HP_HCD
+--- a/drivers/usb/host/Makefile
++++ b/drivers/usb/host/Makefile
+@@ -49,6 +49,7 @@ obj-$(CONFIG_USB_EHCI_HCD_STI)	+= ehci-s
+ obj-$(CONFIG_USB_EHCI_EXYNOS)	+= ehci-exynos.o
+ obj-$(CONFIG_USB_EHCI_HCD_AT91) += ehci-atmel.o
+ obj-$(CONFIG_USB_EHCI_TEGRA)	+= ehci-tegra.o
++obj-$(CONFIG_USB_EHCI_OXNAS)	+= ehci-oxnas.o
+ 
+ obj-$(CONFIG_USB_OXU210HP_HCD)	+= oxu210hp-hcd.o
+ obj-$(CONFIG_USB_ISP116X_HCD)	+= isp116x-hcd.o
+--- a/arch/arm/boot/dts/ox820.dtsi
++++ b/arch/arm/boot/dts/ox820.dtsi
+@@ -106,6 +106,31 @@
+ 			status = "disabled";
+ 		};
+ 
++		ehci: ehci@40200100 {
++			compatible = "plxtech,nas782x-ehci";
++			reg = <0x40200100 0xf00>;
++			interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
++			clocks = <&stdclk CLK_820_USBMPH>, <&pllb>, <&stdclk CLK_820_REF600>;
++			clock-names = "usb", "refsrc", "phyref";
++			resets = <&reset RESET_USBHS>, <&reset RESET_USBPHYA>, <&reset RESET_USBPHYB>;
++			reset-names = "host", "phya", "phyb";
++			oxsemi,sys-ctrl = <&sys>;
++			/* Otherwise ref300 is used, which is derived from sata phy
++			 * in that case, usb depends on sata initialization */
++			/* FIXME: how to make this dependency explicit ? */
++			oxsemi,ehci_use_pllb;
++			status = "disabled";
++
++			ehci_port1: port@1 {
++				reg = <1>;
++				#trigger-source-cells = <0>;
++			};
++			ehci_port2: port@2 {
++				reg = <2>;
++				#trigger-source-cells = <0>;
++			};
++		};
++
+ 		apb-bridge@44000000 {
+ 			#address-cells = <1>;
+ 			#size-cells = <1>;
+--- a/arch/arm/boot/dts/ox820-cloudengines-pogoplug-series-3.dts
++++ b/arch/arm/boot/dts/ox820-cloudengines-pogoplug-series-3.dts
+@@ -105,6 +105,10 @@
+ 	};
+ };
+ 
++&ehci {
++	status = "okay";
++};
++
+ &etha {
+ 	status = "okay";
+ 
diff --git a/target/linux/oxnas/patches-5.4/996-generic-Mangle-bootloader-s-kernel-arguments.patch b/target/linux/oxnas/patches-5.4/996-generic-Mangle-bootloader-s-kernel-arguments.patch
new file mode 100644
index 0000000000..042461e73b
--- /dev/null
+++ b/target/linux/oxnas/patches-5.4/996-generic-Mangle-bootloader-s-kernel-arguments.patch
@@ -0,0 +1,189 @@
+From 71270226b14733a4b1f2cde58ea9265caa50b38d Mon Sep 17 00:00:00 2001
+From: Adrian Panella <ianchi74@outlook.com>
+Date: Thu, 9 Mar 2017 09:37:17 +0100
+Subject: [PATCH 67/69] generic: Mangle bootloader's kernel arguments
+
+The command-line arguments provided by the boot loader will be
+appended to a new device tree property: bootloader-args.
+If there is a property "append-rootblock" in DT under /chosen
+and a root= option in bootloaders command line it will be parsed
+and added to DT bootargs with the form: <append-rootblock>XX.
+Only command line ATAG will be processed, the rest of the ATAGs
+sent by bootloader will be ignored.
+This is usefull in dual boot systems, to get the current root partition
+without afecting the rest of the system.
+
+Signed-off-by: Adrian Panella <ianchi74@outlook.com>
+---
+ arch/arm/Kconfig                        | 11 +++++
+ arch/arm/boot/compressed/atags_to_fdt.c | 72 ++++++++++++++++++++++++++++++++-
+ init/main.c                             | 16 ++++++++
+ 3 files changed, 98 insertions(+), 1 deletion(-)
+
+--- a/arch/arm/Kconfig
++++ b/arch/arm/Kconfig
+@@ -1825,6 +1825,17 @@ config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEN
+ 	  The command-line arguments provided by the boot loader will be
+ 	  appended to the the device tree bootargs property.
+ 
++config ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE
++	bool "Append rootblock parsing bootloader's kernel arguments"
++	help
++	  The command-line arguments provided by the boot loader will be
++	  appended to a new device tree property: bootloader-args.
++	  If there is a property "append-rootblock" in DT under /chosen 
++	  and a root= option in bootloaders command line it will be parsed 
++	  and added to DT bootargs with the form: <append-rootblock>XX.
++	  Only command line ATAG will be processed, the rest of the ATAGs
++	  sent by bootloader will be ignored.
++
+ endchoice
+ 
+ config CMDLINE
+--- a/arch/arm/boot/compressed/atags_to_fdt.c
++++ b/arch/arm/boot/compressed/atags_to_fdt.c
+@@ -4,6 +4,8 @@
+ 
+ #if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND)
+ #define do_extend_cmdline 1
++#elif defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE)
++#define do_extend_cmdline 1
+ #else
+ #define do_extend_cmdline 0
+ #endif
+@@ -67,6 +69,59 @@ static uint32_t get_cell_size(const void
+ 	return cell_size;
+ }
+ 
++#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE)
++
++static char *append_rootblock(char *dest, const char *str, int len, void *fdt)
++{
++	char *ptr, *end;
++	char *root="root=";
++	int i, l;
++	const char *rootblock;
++
++	//ARM doesn't have __HAVE_ARCH_STRSTR, so search manually
++	ptr = str - 1;
++
++	do {
++		//first find an 'r' at the begining or after a space
++		do {
++			ptr++;
++			ptr = strchr(ptr, 'r');
++			if(!ptr) return dest;
++
++		} while (ptr != str && *(ptr-1) != ' ');
++
++		//then check for the rest
++		for(i = 1; i <= 4; i++)
++			if(*(ptr+i) != *(root+i)) break;
++
++	} while (i != 5);
++
++	end = strchr(ptr, ' ');
++	end = end ? (end - 1) : (strchr(ptr, 0) - 1);
++
++	//find partition number (assumes format root=/dev/mtdXX | /dev/mtdblockXX | yy:XX )
++	for( i = 0; end >= ptr && *end >= '0' && *end <= '9'; end--, i++);
++	ptr = end + 1;
++
++	/* if append-rootblock property is set use it to append to command line */
++	rootblock = getprop(fdt, "/chosen", "append-rootblock", &l);
++	if(rootblock != NULL) {
++		if(*dest != ' ') {
++			*dest = ' ';
++			dest++;
++			len++;
++		}
++		if (len + l + i <= COMMAND_LINE_SIZE) {
++			memcpy(dest, rootblock, l);
++			dest += l - 1;
++			memcpy(dest, ptr, i);
++			dest += i;
++		}
++	}
++	return dest;
++}
++#endif
++
+ static void merge_fdt_bootargs(void *fdt, const char *fdt_cmdline)
+ {
+ 	char cmdline[COMMAND_LINE_SIZE];
+@@ -86,12 +141,21 @@ static void merge_fdt_bootargs(void *fdt
+ 
+ 	/* and append the ATAG_CMDLINE */
+ 	if (fdt_cmdline) {
++
++#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE)
++		//save original bootloader args
++		//and append ubi.mtd with root partition number to current cmdline
++		setprop_string(fdt, "/chosen", "bootloader-args", fdt_cmdline);
++		ptr = append_rootblock(ptr, fdt_cmdline, len, fdt);
++
++#else
+ 		len = strlen(fdt_cmdline);
+ 		if (ptr - cmdline + len + 2 < COMMAND_LINE_SIZE) {
+ 			*ptr++ = ' ';
+ 			memcpy(ptr, fdt_cmdline, len);
+ 			ptr += len;
+ 		}
++#endif
+ 	}
+ 	*ptr = '\0';
+ 
+@@ -166,7 +230,9 @@ int atags_to_fdt(void *atag_list, void *
+ 			else
+ 				setprop_string(fdt, "/chosen", "bootargs",
+ 					       atag->u.cmdline.cmdline);
+-		} else if (atag->hdr.tag == ATAG_MEM) {
++		}
++#ifndef CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE
++		else if (atag->hdr.tag == ATAG_MEM) {
+ 			if (memcount >= sizeof(mem_reg_property)/4)
+ 				continue;
+ 			if (!atag->u.mem.size)
+@@ -210,6 +276,10 @@ int atags_to_fdt(void *atag_list, void *
+ 		setprop(fdt, "/memory", "reg", mem_reg_property,
+ 			4 * memcount * memsize);
+ 	}
++#else
++
++	}
++#endif
+ 
+ 	return fdt_pack(fdt);
+ }
+--- a/init/main.c
++++ b/init/main.c
+@@ -103,6 +103,10 @@
+ #define CREATE_TRACE_POINTS
+ #include <trace/events/initcall.h>
+ 
++#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE)
++#include <linux/of.h>
++#endif
++
+ static int kernel_init(void *);
+ 
+ extern void init_IRQ(void);
+@@ -630,6 +634,18 @@ asmlinkage __visible void __init start_k
+ 	page_alloc_init();
+ 
+ 	pr_notice("Kernel command line: %s\n", boot_command_line);
++
++#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE)
++	//Show bootloader's original command line for reference
++	if(of_chosen) {
++		const char *prop = of_get_property(of_chosen, "bootloader-args", NULL);
++		if(prop)
++			pr_notice("Bootloader command line (ignored): %s\n", prop);
++		else
++			pr_notice("Bootloader command line not present\n");
++	}
++#endif
++
+ 	/* parameters may set static keys */
+ 	jump_label_init();
+ 	parse_early_param();
diff --git a/target/linux/oxnas/patches-5.4/999-libata-hacks.patch b/target/linux/oxnas/patches-5.4/999-libata-hacks.patch
new file mode 100644
index 0000000000..7c70a597d0
--- /dev/null
+++ b/target/linux/oxnas/patches-5.4/999-libata-hacks.patch
@@ -0,0 +1,57 @@
+--- a/drivers/ata/libata-core.c
++++ b/drivers/ata/libata-core.c
+@@ -1584,6 +1584,14 @@ unsigned ata_exec_internal_sg(struct ata
+ 		return AC_ERR_SYSTEM;
+ 	}
+ 
++	if (ap->ops->acquire_hw && !ap->ops->acquire_hw(ap, 0, 0)) {
++		spin_unlock_irqrestore(ap->lock, flags);
++		if (!ap->ops->acquire_hw(ap, 1, (2*HZ))) {
++			return AC_ERR_TIMEOUT;
++		}
++		spin_lock_irqsave(ap->lock, flags);
++	}
++
+ 	/* initialize internal qc */
+ 	qc = __ata_qc_from_tag(ap, ATA_TAG_INTERNAL);
+ 
+@@ -5123,6 +5131,9 @@ struct ata_queued_cmd *ata_qc_new_init(s
+ 	if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
+ 		return NULL;
+ 
++	if (ap->ops->qc_new && ap->ops->qc_new(ap))
++		return NULL;
++
+ 	/* libsas case */
+ 	if (ap->flags & ATA_FLAG_SAS_HOST) {
+ 		tag = ata_sas_allocate_tag(ap);
+@@ -5168,6 +5179,8 @@ void ata_qc_free(struct ata_queued_cmd *
+ 		qc->tag = ATA_TAG_POISON;
+ 		if (ap->flags & ATA_FLAG_SAS_HOST)
+ 			ata_sas_free_tag(tag, ap);
++		if (ap->ops->qc_free)
++			ap->ops->qc_free(qc);
+ 	}
+ }
+ 
+--- a/include/linux/libata.h
++++ b/include/linux/libata.h
+@@ -905,6 +905,8 @@ struct ata_port_operations {
+ 	void (*qc_prep)(struct ata_queued_cmd *qc);
+ 	unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
+ 	bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
++	int (*qc_new)(struct ata_port *ap);
++	void (*qc_free)(struct ata_queued_cmd *qc);
+ 
+ 	/*
+ 	 * Configuration and exception handling
+@@ -995,6 +997,9 @@ struct ata_port_operations {
+ 	void (*phy_reset)(struct ata_port *ap);
+ 	void (*eng_timeout)(struct ata_port *ap);
+ 
++	int (*acquire_hw)(struct ata_port *ap, int may_sleep,
++			  int timeout_jiffies);
++
+ 	/*
+ 	 * ->inherits must be the last field and all the preceding
+ 	 * fields must be pointers.