Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 611 insertions, 0 deletions

diff --git a/drivers/irqchip/irq-renesas-intc-irqpin.c b/drivers/irqchip/irq-renesas-intc-irqpin.c
new file mode 100644
index 000000000..e83756aca
--- /dev/null
+++ b/drivers/irqchip/irq-renesas-intc-irqpin.c
@@ -0,0 +1,611 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas INTC External IRQ Pin Driver
+ *
+ *  Copyright (C) 2013 Magnus Damm
+ */
+
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
+
+#define INTC_IRQPIN_MAX 8 /* maximum 8 interrupts per driver instance */
+
+#define INTC_IRQPIN_REG_SENSE 0 /* ICRn */
+#define INTC_IRQPIN_REG_PRIO 1 /* INTPRInn */
+#define INTC_IRQPIN_REG_SOURCE 2 /* INTREQnn */
+#define INTC_IRQPIN_REG_MASK 3 /* INTMSKnn */
+#define INTC_IRQPIN_REG_CLEAR 4 /* INTMSKCLRnn */
+#define INTC_IRQPIN_REG_NR_MANDATORY 5
+#define INTC_IRQPIN_REG_IRLM 5 /* ICR0 with IRLM bit (optional) */
+#define INTC_IRQPIN_REG_NR 6
+
+/* INTC external IRQ PIN hardware register access:
+ *
+ * SENSE is read-write 32-bit with 2-bits or 4-bits per IRQ (*)
+ * PRIO is read-write 32-bit with 4-bits per IRQ (**)
+ * SOURCE is read-only 32-bit or 8-bit with 1-bit per IRQ (***)
+ * MASK is write-only 32-bit or 8-bit with 1-bit per IRQ (***)
+ * CLEAR is write-only 32-bit or 8-bit with 1-bit per IRQ (***)
+ *
+ * (*) May be accessed by more than one driver instance - lock needed
+ * (**) Read-modify-write access by one driver instance - lock needed
+ * (***) Accessed by one driver instance only - no locking needed
+ */
+
+struct intc_irqpin_iomem {
+	void __iomem *iomem;
+	unsigned long (*read)(void __iomem *iomem);
+	void (*write)(void __iomem *iomem, unsigned long data);
+	int width;
+};
+
+struct intc_irqpin_irq {
+	int hw_irq;
+	int requested_irq;
+	int domain_irq;
+	struct intc_irqpin_priv *p;
+};
+
+struct intc_irqpin_priv {
+	struct intc_irqpin_iomem iomem[INTC_IRQPIN_REG_NR];
+	struct intc_irqpin_irq irq[INTC_IRQPIN_MAX];
+	unsigned int sense_bitfield_width;
+	struct platform_device *pdev;
+	struct irq_chip irq_chip;
+	struct irq_domain *irq_domain;
+	atomic_t wakeup_path;
+	unsigned shared_irqs:1;
+	u8 shared_irq_mask;
+};
+
+struct intc_irqpin_config {
+	int irlm_bit;		/* -1 if non-existent */
+};
+
+static unsigned long intc_irqpin_read32(void __iomem *iomem)
+{
+	return ioread32(iomem);
+}
+
+static unsigned long intc_irqpin_read8(void __iomem *iomem)
+{
+	return ioread8(iomem);
+}
+
+static void intc_irqpin_write32(void __iomem *iomem, unsigned long data)
+{
+	iowrite32(data, iomem);
+}
+
+static void intc_irqpin_write8(void __iomem *iomem, unsigned long data)
+{
+	iowrite8(data, iomem);
+}
+
+static inline unsigned long intc_irqpin_read(struct intc_irqpin_priv *p,
+					     int reg)
+{
+	struct intc_irqpin_iomem *i = &p->iomem[reg];
+
+	return i->read(i->iomem);
+}
+
+static inline void intc_irqpin_write(struct intc_irqpin_priv *p,
+				     int reg, unsigned long data)
+{
+	struct intc_irqpin_iomem *i = &p->iomem[reg];
+
+	i->write(i->iomem, data);
+}
+
+static inline unsigned long intc_irqpin_hwirq_mask(struct intc_irqpin_priv *p,
+						   int reg, int hw_irq)
+{
+	return BIT((p->iomem[reg].width - 1) - hw_irq);
+}
+
+static inline void intc_irqpin_irq_write_hwirq(struct intc_irqpin_priv *p,
+					       int reg, int hw_irq)
+{
+	intc_irqpin_write(p, reg, intc_irqpin_hwirq_mask(p, reg, hw_irq));
+}
+
+static DEFINE_RAW_SPINLOCK(intc_irqpin_lock); /* only used by slow path */
+
+static void intc_irqpin_read_modify_write(struct intc_irqpin_priv *p,
+					  int reg, int shift,
+					  int width, int value)
+{
+	unsigned long flags;
+	unsigned long tmp;
+
+	raw_spin_lock_irqsave(&intc_irqpin_lock, flags);
+
+	tmp = intc_irqpin_read(p, reg);
+	tmp &= ~(((1 << width) - 1) << shift);
+	tmp |= value << shift;
+	intc_irqpin_write(p, reg, tmp);
+
+	raw_spin_unlock_irqrestore(&intc_irqpin_lock, flags);
+}
+
+static void intc_irqpin_mask_unmask_prio(struct intc_irqpin_priv *p,
+					 int irq, int do_mask)
+{
+	/* The PRIO register is assumed to be 32-bit with fixed 4-bit fields. */
+	int bitfield_width = 4;
+	int shift = 32 - (irq + 1) * bitfield_width;
+
+	intc_irqpin_read_modify_write(p, INTC_IRQPIN_REG_PRIO,
+				      shift, bitfield_width,
+				      do_mask ? 0 : (1 << bitfield_width) - 1);
+}
+
+static int intc_irqpin_set_sense(struct intc_irqpin_priv *p, int irq, int value)
+{
+	/* The SENSE register is assumed to be 32-bit. */
+	int bitfield_width = p->sense_bitfield_width;
+	int shift = 32 - (irq + 1) * bitfield_width;
+
+	dev_dbg(&p->pdev->dev, "sense irq = %d, mode = %d\n", irq, value);
+
+	if (value >= (1 << bitfield_width))
+		return -EINVAL;
+
+	intc_irqpin_read_modify_write(p, INTC_IRQPIN_REG_SENSE, shift,
+				      bitfield_width, value);
+	return 0;
+}
+
+static void intc_irqpin_dbg(struct intc_irqpin_irq *i, char *str)
+{
+	dev_dbg(&i->p->pdev->dev, "%s (%d:%d:%d)\n",
+		str, i->requested_irq, i->hw_irq, i->domain_irq);
+}
+
+static void intc_irqpin_irq_enable(struct irq_data *d)
+{
+	struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
+	int hw_irq = irqd_to_hwirq(d);
+
+	intc_irqpin_dbg(&p->irq[hw_irq], "enable");
+	intc_irqpin_irq_write_hwirq(p, INTC_IRQPIN_REG_CLEAR, hw_irq);
+}
+
+static void intc_irqpin_irq_disable(struct irq_data *d)
+{
+	struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
+	int hw_irq = irqd_to_hwirq(d);
+
+	intc_irqpin_dbg(&p->irq[hw_irq], "disable");
+	intc_irqpin_irq_write_hwirq(p, INTC_IRQPIN_REG_MASK, hw_irq);
+}
+
+static void intc_irqpin_shared_irq_enable(struct irq_data *d)
+{
+	struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
+	int hw_irq = irqd_to_hwirq(d);
+
+	intc_irqpin_dbg(&p->irq[hw_irq], "shared enable");
+	intc_irqpin_irq_write_hwirq(p, INTC_IRQPIN_REG_CLEAR, hw_irq);
+
+	p->shared_irq_mask &= ~BIT(hw_irq);
+}
+
+static void intc_irqpin_shared_irq_disable(struct irq_data *d)
+{
+	struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
+	int hw_irq = irqd_to_hwirq(d);
+
+	intc_irqpin_dbg(&p->irq[hw_irq], "shared disable");
+	intc_irqpin_irq_write_hwirq(p, INTC_IRQPIN_REG_MASK, hw_irq);
+
+	p->shared_irq_mask |= BIT(hw_irq);
+}
+
+static void intc_irqpin_irq_enable_force(struct irq_data *d)
+{
+	struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
+	int irq = p->irq[irqd_to_hwirq(d)].requested_irq;
+
+	intc_irqpin_irq_enable(d);
+
+	/* enable interrupt through parent interrupt controller,
+	 * assumes non-shared interrupt with 1:1 mapping
+	 * needed for busted IRQs on some SoCs like sh73a0
+	 */
+	irq_get_chip(irq)->irq_unmask(irq_get_irq_data(irq));
+}
+
+static void intc_irqpin_irq_disable_force(struct irq_data *d)
+{
+	struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
+	int irq = p->irq[irqd_to_hwirq(d)].requested_irq;
+
+	/* disable interrupt through parent interrupt controller,
+	 * assumes non-shared interrupt with 1:1 mapping
+	 * needed for busted IRQs on some SoCs like sh73a0
+	 */
+	irq_get_chip(irq)->irq_mask(irq_get_irq_data(irq));
+	intc_irqpin_irq_disable(d);
+}
+
+#define INTC_IRQ_SENSE_VALID 0x10
+#define INTC_IRQ_SENSE(x) (x + INTC_IRQ_SENSE_VALID)
+
+static unsigned char intc_irqpin_sense[IRQ_TYPE_SENSE_MASK + 1] = {
+	[IRQ_TYPE_EDGE_FALLING] = INTC_IRQ_SENSE(0x00),
+	[IRQ_TYPE_EDGE_RISING] = INTC_IRQ_SENSE(0x01),
+	[IRQ_TYPE_LEVEL_LOW] = INTC_IRQ_SENSE(0x02),
+	[IRQ_TYPE_LEVEL_HIGH] = INTC_IRQ_SENSE(0x03),
+	[IRQ_TYPE_EDGE_BOTH] = INTC_IRQ_SENSE(0x04),
+};
+
+static int intc_irqpin_irq_set_type(struct irq_data *d, unsigned int type)
+{
+	unsigned char value = intc_irqpin_sense[type & IRQ_TYPE_SENSE_MASK];
+	struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
+
+	if (!(value & INTC_IRQ_SENSE_VALID))
+		return -EINVAL;
+
+	return intc_irqpin_set_sense(p, irqd_to_hwirq(d),
+				     value ^ INTC_IRQ_SENSE_VALID);
+}
+
+static int intc_irqpin_irq_set_wake(struct irq_data *d, unsigned int on)
+{
+	struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
+	int hw_irq = irqd_to_hwirq(d);
+
+	irq_set_irq_wake(p->irq[hw_irq].requested_irq, on);
+	if (on)
+		atomic_inc(&p->wakeup_path);
+	else
+		atomic_dec(&p->wakeup_path);
+
+	return 0;
+}
+
+static irqreturn_t intc_irqpin_irq_handler(int irq, void *dev_id)
+{
+	struct intc_irqpin_irq *i = dev_id;
+	struct intc_irqpin_priv *p = i->p;
+	unsigned long bit;
+
+	intc_irqpin_dbg(i, "demux1");
+	bit = intc_irqpin_hwirq_mask(p, INTC_IRQPIN_REG_SOURCE, i->hw_irq);
+
+	if (intc_irqpin_read(p, INTC_IRQPIN_REG_SOURCE) & bit) {
+		intc_irqpin_write(p, INTC_IRQPIN_REG_SOURCE, ~bit);
+		intc_irqpin_dbg(i, "demux2");
+		generic_handle_irq(i->domain_irq);
+		return IRQ_HANDLED;
+	}
+	return IRQ_NONE;
+}
+
+static irqreturn_t intc_irqpin_shared_irq_handler(int irq, void *dev_id)
+{
+	struct intc_irqpin_priv *p = dev_id;
+	unsigned int reg_source = intc_irqpin_read(p, INTC_IRQPIN_REG_SOURCE);
+	irqreturn_t status = IRQ_NONE;
+	int k;
+
+	for (k = 0; k < 8; k++) {
+		if (reg_source & BIT(7 - k)) {
+			if (BIT(k) & p->shared_irq_mask)
+				continue;
+
+			status |= intc_irqpin_irq_handler(irq, &p->irq[k]);
+		}
+	}
+
+	return status;
+}
+
+/*
+ * This lock class tells lockdep that INTC External IRQ Pin irqs are in a
+ * different category than their parents, so it won't report false recursion.
+ */
+static struct lock_class_key intc_irqpin_irq_lock_class;
+
+/* And this is for the request mutex */
+static struct lock_class_key intc_irqpin_irq_request_class;
+
+static int intc_irqpin_irq_domain_map(struct irq_domain *h, unsigned int virq,
+				      irq_hw_number_t hw)
+{
+	struct intc_irqpin_priv *p = h->host_data;
+
+	p->irq[hw].domain_irq = virq;
+	p->irq[hw].hw_irq = hw;
+
+	intc_irqpin_dbg(&p->irq[hw], "map");
+	irq_set_chip_data(virq, h->host_data);
+	irq_set_lockdep_class(virq, &intc_irqpin_irq_lock_class,
+			      &intc_irqpin_irq_request_class);
+	irq_set_chip_and_handler(virq, &p->irq_chip, handle_level_irq);
+	return 0;
+}
+
+static const struct irq_domain_ops intc_irqpin_irq_domain_ops = {
+	.map	= intc_irqpin_irq_domain_map,
+	.xlate  = irq_domain_xlate_twocell,
+};
+
+static const struct intc_irqpin_config intc_irqpin_irlm_r8a777x = {
+	.irlm_bit = 23, /* ICR0.IRLM0 */
+};
+
+static const struct intc_irqpin_config intc_irqpin_rmobile = {
+	.irlm_bit = -1,
+};
+
+static const struct of_device_id intc_irqpin_dt_ids[] = {
+	{ .compatible = "renesas,intc-irqpin", },
+	{ .compatible = "renesas,intc-irqpin-r8a7778",
+	  .data = &intc_irqpin_irlm_r8a777x },
+	{ .compatible = "renesas,intc-irqpin-r8a7779",
+	  .data = &intc_irqpin_irlm_r8a777x },
+	{ .compatible = "renesas,intc-irqpin-r8a7740",
+	  .data = &intc_irqpin_rmobile },
+	{ .compatible = "renesas,intc-irqpin-sh73a0",
+	  .data = &intc_irqpin_rmobile },
+	{},
+};
+MODULE_DEVICE_TABLE(of, intc_irqpin_dt_ids);
+
+static int intc_irqpin_probe(struct platform_device *pdev)
+{
+	const struct intc_irqpin_config *config;
+	struct device *dev = &pdev->dev;
+	struct intc_irqpin_priv *p;
+	struct intc_irqpin_iomem *i;
+	struct resource *io[INTC_IRQPIN_REG_NR];
+	struct irq_chip *irq_chip;
+	void (*enable_fn)(struct irq_data *d);
+	void (*disable_fn)(struct irq_data *d);
+	const char *name = dev_name(dev);
+	bool control_parent;
+	unsigned int nirqs;
+	int ref_irq;
+	int ret;
+	int k;
+
+	p = devm_kzalloc(dev, sizeof(*p), GFP_KERNEL);
+	if (!p)
+		return -ENOMEM;
+
+	/* deal with driver instance configuration */
+	of_property_read_u32(dev->of_node, "sense-bitfield-width",
+			     &p->sense_bitfield_width);
+	control_parent = of_property_read_bool(dev->of_node, "control-parent");
+	if (!p->sense_bitfield_width)
+		p->sense_bitfield_width = 4; /* default to 4 bits */
+
+	p->pdev = pdev;
+	platform_set_drvdata(pdev, p);
+
+	config = of_device_get_match_data(dev);
+
+	pm_runtime_enable(dev);
+	pm_runtime_get_sync(dev);
+
+	/* get hold of register banks */
+	memset(io, 0, sizeof(io));
+	for (k = 0; k < INTC_IRQPIN_REG_NR; k++) {
+		io[k] = platform_get_resource(pdev, IORESOURCE_MEM, k);
+		if (!io[k] && k < INTC_IRQPIN_REG_NR_MANDATORY) {
+			dev_err(dev, "not enough IOMEM resources\n");
+			ret = -EINVAL;
+			goto err0;
+		}
+	}
+
+	/* allow any number of IRQs between 1 and INTC_IRQPIN_MAX */
+	for (k = 0; k < INTC_IRQPIN_MAX; k++) {
+		ret = platform_get_irq_optional(pdev, k);
+		if (ret == -ENXIO)
+			break;
+		if (ret < 0)
+			goto err0;
+
+		p->irq[k].p = p;
+		p->irq[k].requested_irq = ret;
+	}
+
+	nirqs = k;
+	if (nirqs < 1) {
+		dev_err(dev, "not enough IRQ resources\n");
+		ret = -EINVAL;
+		goto err0;
+	}
+
+	/* ioremap IOMEM and setup read/write callbacks */
+	for (k = 0; k < INTC_IRQPIN_REG_NR; k++) {
+		i = &p->iomem[k];
+
+		/* handle optional registers */
+		if (!io[k])
+			continue;
+
+		switch (resource_size(io[k])) {
+		case 1:
+			i->width = 8;
+			i->read = intc_irqpin_read8;
+			i->write = intc_irqpin_write8;
+			break;
+		case 4:
+			i->width = 32;
+			i->read = intc_irqpin_read32;
+			i->write = intc_irqpin_write32;
+			break;
+		default:
+			dev_err(dev, "IOMEM size mismatch\n");
+			ret = -EINVAL;
+			goto err0;
+		}
+
+		i->iomem = devm_ioremap(dev, io[k]->start,
+					resource_size(io[k]));
+		if (!i->iomem) {
+			dev_err(dev, "failed to remap IOMEM\n");
+			ret = -ENXIO;
+			goto err0;
+		}
+	}
+
+	/* configure "individual IRQ mode" where needed */
+	if (config && config->irlm_bit >= 0) {
+		if (io[INTC_IRQPIN_REG_IRLM])
+			intc_irqpin_read_modify_write(p, INTC_IRQPIN_REG_IRLM,
+						      config->irlm_bit, 1, 1);
+		else
+			dev_warn(dev, "unable to select IRLM mode\n");
+	}
+
+	/* mask all interrupts using priority */
+	for (k = 0; k < nirqs; k++)
+		intc_irqpin_mask_unmask_prio(p, k, 1);
+
+	/* clear all pending interrupts */
+	intc_irqpin_write(p, INTC_IRQPIN_REG_SOURCE, 0x0);
+
+	/* scan for shared interrupt lines */
+	ref_irq = p->irq[0].requested_irq;
+	p->shared_irqs = 1;
+	for (k = 1; k < nirqs; k++) {
+		if (ref_irq != p->irq[k].requested_irq) {
+			p->shared_irqs = 0;
+			break;
+		}
+	}
+
+	/* use more severe masking method if requested */
+	if (control_parent) {
+		enable_fn = intc_irqpin_irq_enable_force;
+		disable_fn = intc_irqpin_irq_disable_force;
+	} else if (!p->shared_irqs) {
+		enable_fn = intc_irqpin_irq_enable;
+		disable_fn = intc_irqpin_irq_disable;
+	} else {
+		enable_fn = intc_irqpin_shared_irq_enable;
+		disable_fn = intc_irqpin_shared_irq_disable;
+	}
+
+	irq_chip = &p->irq_chip;
+	irq_chip->name = "intc-irqpin";
+	irq_chip->irq_mask = disable_fn;
+	irq_chip->irq_unmask = enable_fn;
+	irq_chip->irq_set_type = intc_irqpin_irq_set_type;
+	irq_chip->irq_set_wake = intc_irqpin_irq_set_wake;
+	irq_chip->flags	= IRQCHIP_MASK_ON_SUSPEND;
+
+	p->irq_domain = irq_domain_add_simple(dev->of_node, nirqs, 0,
+					      &intc_irqpin_irq_domain_ops, p);
+	if (!p->irq_domain) {
+		ret = -ENXIO;
+		dev_err(dev, "cannot initialize irq domain\n");
+		goto err0;
+	}
+
+	irq_domain_set_pm_device(p->irq_domain, dev);
+
+	if (p->shared_irqs) {
+		/* request one shared interrupt */
+		if (devm_request_irq(dev, p->irq[0].requested_irq,
+				intc_irqpin_shared_irq_handler,
+				IRQF_SHARED, name, p)) {
+			dev_err(dev, "failed to request low IRQ\n");
+			ret = -ENOENT;
+			goto err1;
+		}
+	} else {
+		/* request interrupts one by one */
+		for (k = 0; k < nirqs; k++) {
+			if (devm_request_irq(dev, p->irq[k].requested_irq,
+					     intc_irqpin_irq_handler, 0, name,
+					     &p->irq[k])) {
+				dev_err(dev, "failed to request low IRQ\n");
+				ret = -ENOENT;
+				goto err1;
+			}
+		}
+	}
+
+	/* unmask all interrupts on prio level */
+	for (k = 0; k < nirqs; k++)
+		intc_irqpin_mask_unmask_prio(p, k, 0);
+
+	dev_info(dev, "driving %d irqs\n", nirqs);
+
+	return 0;
+
+err1:
+	irq_domain_remove(p->irq_domain);
+err0:
+	pm_runtime_put(dev);
+	pm_runtime_disable(dev);
+	return ret;
+}
+
+static int intc_irqpin_remove(struct platform_device *pdev)
+{
+	struct intc_irqpin_priv *p = platform_get_drvdata(pdev);
+
+	irq_domain_remove(p->irq_domain);
+	pm_runtime_put(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+	return 0;
+}
+
+static int __maybe_unused intc_irqpin_suspend(struct device *dev)
+{
+	struct intc_irqpin_priv *p = dev_get_drvdata(dev);
+
+	if (atomic_read(&p->wakeup_path))
+		device_set_wakeup_path(dev);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(intc_irqpin_pm_ops, intc_irqpin_suspend, NULL);
+
+static struct platform_driver intc_irqpin_device_driver = {
+	.probe		= intc_irqpin_probe,
+	.remove		= intc_irqpin_remove,
+	.driver		= {
+		.name	= "renesas_intc_irqpin",
+		.of_match_table = intc_irqpin_dt_ids,
+		.pm	= &intc_irqpin_pm_ops,
+	}
+};
+
+static int __init intc_irqpin_init(void)
+{
+	return platform_driver_register(&intc_irqpin_device_driver);
+}
+postcore_initcall(intc_irqpin_init);
+
+static void __exit intc_irqpin_exit(void)
+{
+	platform_driver_unregister(&intc_irqpin_device_driver);
+}
+module_exit(intc_irqpin_exit);
+
+MODULE_AUTHOR("Magnus Damm");
+MODULE_DESCRIPTION("Renesas INTC External IRQ Pin Driver");
+MODULE_LICENSE("GPL v2");