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, 467 insertions, 0 deletions

diff --git a/drivers/gpio/gpio-ep93xx.c b/drivers/gpio/gpio-ep93xx.c
new file mode 100644
index 000000000..6cedf46ef
--- /dev/null
+++ b/drivers/gpio/gpio-ep93xx.c
@@ -0,0 +1,467 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Generic EP93xx GPIO handling
+ *
+ * Copyright (c) 2008 Ryan Mallon
+ * Copyright (c) 2011 H Hartley Sweeten <hsweeten@visionengravers.com>
+ *
+ * Based on code originally from:
+ *  linux/arch/arm/mach-ep93xx/core.c
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/gpio/driver.h>
+#include <linux/bitops.h>
+#include <linux/seq_file.h>
+
+#define EP93XX_GPIO_F_INT_STATUS 0x5c
+#define EP93XX_GPIO_A_INT_STATUS 0xa0
+#define EP93XX_GPIO_B_INT_STATUS 0xbc
+
+/* Maximum value for gpio line identifiers */
+#define EP93XX_GPIO_LINE_MAX 63
+
+/* Number of GPIO chips in EP93XX */
+#define EP93XX_GPIO_CHIP_NUM 8
+
+/* Maximum value for irq capable line identifiers */
+#define EP93XX_GPIO_LINE_MAX_IRQ 23
+
+#define EP93XX_GPIO_A_IRQ_BASE 64
+#define EP93XX_GPIO_B_IRQ_BASE 72
+/*
+ * Static mapping of GPIO bank F IRQS:
+ * F0..F7 (16..24) to irq 80..87.
+ */
+#define EP93XX_GPIO_F_IRQ_BASE 80
+
+struct ep93xx_gpio_irq_chip {
+	u8 irq_offset;
+	u8 int_unmasked;
+	u8 int_enabled;
+	u8 int_type1;
+	u8 int_type2;
+	u8 int_debounce;
+};
+
+struct ep93xx_gpio_chip {
+	struct gpio_chip		gc;
+	struct ep93xx_gpio_irq_chip	*eic;
+};
+
+struct ep93xx_gpio {
+	void __iomem		*base;
+	struct ep93xx_gpio_chip	gc[EP93XX_GPIO_CHIP_NUM];
+};
+
+#define to_ep93xx_gpio_chip(x) container_of(x, struct ep93xx_gpio_chip, gc)
+
+static struct ep93xx_gpio_irq_chip *to_ep93xx_gpio_irq_chip(struct gpio_chip *gc)
+{
+	struct ep93xx_gpio_chip *egc = to_ep93xx_gpio_chip(gc);
+
+	return egc->eic;
+}
+
+/*************************************************************************
+ * Interrupt handling for EP93xx on-chip GPIOs
+ *************************************************************************/
+#define EP93XX_INT_TYPE1_OFFSET		0x00
+#define EP93XX_INT_TYPE2_OFFSET		0x04
+#define EP93XX_INT_EOI_OFFSET		0x08
+#define EP93XX_INT_EN_OFFSET		0x0c
+#define EP93XX_INT_STATUS_OFFSET	0x10
+#define EP93XX_INT_RAW_STATUS_OFFSET	0x14
+#define EP93XX_INT_DEBOUNCE_OFFSET	0x18
+
+static void ep93xx_gpio_update_int_params(struct ep93xx_gpio *epg,
+					  struct ep93xx_gpio_irq_chip *eic)
+{
+	writeb_relaxed(0, epg->base + eic->irq_offset + EP93XX_INT_EN_OFFSET);
+
+	writeb_relaxed(eic->int_type2,
+		       epg->base + eic->irq_offset + EP93XX_INT_TYPE2_OFFSET);
+
+	writeb_relaxed(eic->int_type1,
+		       epg->base + eic->irq_offset + EP93XX_INT_TYPE1_OFFSET);
+
+	writeb_relaxed(eic->int_unmasked & eic->int_enabled,
+		       epg->base + eic->irq_offset + EP93XX_INT_EN_OFFSET);
+}
+
+static void ep93xx_gpio_int_debounce(struct gpio_chip *gc,
+				     unsigned int offset, bool enable)
+{
+	struct ep93xx_gpio *epg = gpiochip_get_data(gc);
+	struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc);
+	int port_mask = BIT(offset);
+
+	if (enable)
+		eic->int_debounce |= port_mask;
+	else
+		eic->int_debounce &= ~port_mask;
+
+	writeb(eic->int_debounce,
+	       epg->base + eic->irq_offset + EP93XX_INT_DEBOUNCE_OFFSET);
+}
+
+static void ep93xx_gpio_ab_irq_handler(struct irq_desc *desc)
+{
+	struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+	struct ep93xx_gpio *epg = gpiochip_get_data(gc);
+	struct irq_chip *irqchip = irq_desc_get_chip(desc);
+	unsigned long stat;
+	int offset;
+
+	chained_irq_enter(irqchip, desc);
+
+	/*
+	 * Dispatch the IRQs to the irqdomain of each A and B
+	 * gpiochip irqdomains depending on what has fired.
+	 * The tricky part is that the IRQ line is shared
+	 * between bank A and B and each has their own gpiochip.
+	 */
+	stat = readb(epg->base + EP93XX_GPIO_A_INT_STATUS);
+	for_each_set_bit(offset, &stat, 8)
+		generic_handle_domain_irq(epg->gc[0].gc.irq.domain,
+					  offset);
+
+	stat = readb(epg->base + EP93XX_GPIO_B_INT_STATUS);
+	for_each_set_bit(offset, &stat, 8)
+		generic_handle_domain_irq(epg->gc[1].gc.irq.domain,
+					  offset);
+
+	chained_irq_exit(irqchip, desc);
+}
+
+static void ep93xx_gpio_f_irq_handler(struct irq_desc *desc)
+{
+	/*
+	 * map discontiguous hw irq range to continuous sw irq range:
+	 *
+	 *  IRQ_EP93XX_GPIO{0..7}MUX -> EP93XX_GPIO_LINE_F{0..7}
+	 */
+	struct irq_chip *irqchip = irq_desc_get_chip(desc);
+	unsigned int irq = irq_desc_get_irq(desc);
+	int port_f_idx = (irq & 7) ^ 4; /* {20..23,48..51} -> {0..7} */
+	int gpio_irq = EP93XX_GPIO_F_IRQ_BASE + port_f_idx;
+
+	chained_irq_enter(irqchip, desc);
+	generic_handle_irq(gpio_irq);
+	chained_irq_exit(irqchip, desc);
+}
+
+static void ep93xx_gpio_irq_ack(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc);
+	struct ep93xx_gpio *epg = gpiochip_get_data(gc);
+	int port_mask = BIT(d->irq & 7);
+
+	if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH) {
+		eic->int_type2 ^= port_mask; /* switch edge direction */
+		ep93xx_gpio_update_int_params(epg, eic);
+	}
+
+	writeb(port_mask, epg->base + eic->irq_offset + EP93XX_INT_EOI_OFFSET);
+}
+
+static void ep93xx_gpio_irq_mask_ack(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc);
+	struct ep93xx_gpio *epg = gpiochip_get_data(gc);
+	int port_mask = BIT(d->irq & 7);
+
+	if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH)
+		eic->int_type2 ^= port_mask; /* switch edge direction */
+
+	eic->int_unmasked &= ~port_mask;
+	ep93xx_gpio_update_int_params(epg, eic);
+
+	writeb(port_mask, epg->base + eic->irq_offset + EP93XX_INT_EOI_OFFSET);
+	gpiochip_disable_irq(gc, irqd_to_hwirq(d));
+}
+
+static void ep93xx_gpio_irq_mask(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc);
+	struct ep93xx_gpio *epg = gpiochip_get_data(gc);
+
+	eic->int_unmasked &= ~BIT(d->irq & 7);
+	ep93xx_gpio_update_int_params(epg, eic);
+	gpiochip_disable_irq(gc, irqd_to_hwirq(d));
+}
+
+static void ep93xx_gpio_irq_unmask(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc);
+	struct ep93xx_gpio *epg = gpiochip_get_data(gc);
+
+	gpiochip_enable_irq(gc, irqd_to_hwirq(d));
+	eic->int_unmasked |= BIT(d->irq & 7);
+	ep93xx_gpio_update_int_params(epg, eic);
+}
+
+/*
+ * gpio_int_type1 controls whether the interrupt is level (0) or
+ * edge (1) triggered, while gpio_int_type2 controls whether it
+ * triggers on low/falling (0) or high/rising (1).
+ */
+static int ep93xx_gpio_irq_type(struct irq_data *d, unsigned int type)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct ep93xx_gpio_irq_chip *eic = to_ep93xx_gpio_irq_chip(gc);
+	struct ep93xx_gpio *epg = gpiochip_get_data(gc);
+	int offset = d->irq & 7;
+	int port_mask = BIT(offset);
+	irq_flow_handler_t handler;
+
+	gc->direction_input(gc, offset);
+
+	switch (type) {
+	case IRQ_TYPE_EDGE_RISING:
+		eic->int_type1 |= port_mask;
+		eic->int_type2 |= port_mask;
+		handler = handle_edge_irq;
+		break;
+	case IRQ_TYPE_EDGE_FALLING:
+		eic->int_type1 |= port_mask;
+		eic->int_type2 &= ~port_mask;
+		handler = handle_edge_irq;
+		break;
+	case IRQ_TYPE_LEVEL_HIGH:
+		eic->int_type1 &= ~port_mask;
+		eic->int_type2 |= port_mask;
+		handler = handle_level_irq;
+		break;
+	case IRQ_TYPE_LEVEL_LOW:
+		eic->int_type1 &= ~port_mask;
+		eic->int_type2 &= ~port_mask;
+		handler = handle_level_irq;
+		break;
+	case IRQ_TYPE_EDGE_BOTH:
+		eic->int_type1 |= port_mask;
+		/* set initial polarity based on current input level */
+		if (gc->get(gc, offset))
+			eic->int_type2 &= ~port_mask; /* falling */
+		else
+			eic->int_type2 |= port_mask; /* rising */
+		handler = handle_edge_irq;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	irq_set_handler_locked(d, handler);
+
+	eic->int_enabled |= port_mask;
+
+	ep93xx_gpio_update_int_params(epg, eic);
+
+	return 0;
+}
+
+/*************************************************************************
+ * gpiolib interface for EP93xx on-chip GPIOs
+ *************************************************************************/
+struct ep93xx_gpio_bank {
+	const char	*label;
+	int		data;
+	int		dir;
+	int		irq;
+	int		base;
+	bool		has_irq;
+	bool		has_hierarchical_irq;
+	unsigned int	irq_base;
+};
+
+#define EP93XX_GPIO_BANK(_label, _data, _dir, _irq, _base, _has_irq, _has_hier, _irq_base) \
+	{							\
+		.label		= _label,			\
+		.data		= _data,			\
+		.dir		= _dir,				\
+		.irq		= _irq,				\
+		.base		= _base,			\
+		.has_irq	= _has_irq,			\
+		.has_hierarchical_irq = _has_hier,		\
+		.irq_base	= _irq_base,			\
+	}
+
+static struct ep93xx_gpio_bank ep93xx_gpio_banks[] = {
+	/* Bank A has 8 IRQs */
+	EP93XX_GPIO_BANK("A", 0x00, 0x10, 0x90, 0, true, false, EP93XX_GPIO_A_IRQ_BASE),
+	/* Bank B has 8 IRQs */
+	EP93XX_GPIO_BANK("B", 0x04, 0x14, 0xac, 8, true, false, EP93XX_GPIO_B_IRQ_BASE),
+	EP93XX_GPIO_BANK("C", 0x08, 0x18, 0x00, 40, false, false, 0),
+	EP93XX_GPIO_BANK("D", 0x0c, 0x1c, 0x00, 24, false, false, 0),
+	EP93XX_GPIO_BANK("E", 0x20, 0x24, 0x00, 32, false, false, 0),
+	/* Bank F has 8 IRQs */
+	EP93XX_GPIO_BANK("F", 0x30, 0x34, 0x4c, 16, false, true, EP93XX_GPIO_F_IRQ_BASE),
+	EP93XX_GPIO_BANK("G", 0x38, 0x3c, 0x00, 48, false, false, 0),
+	EP93XX_GPIO_BANK("H", 0x40, 0x44, 0x00, 56, false, false, 0),
+};
+
+static int ep93xx_gpio_set_config(struct gpio_chip *gc, unsigned offset,
+				  unsigned long config)
+{
+	u32 debounce;
+
+	if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
+		return -ENOTSUPP;
+
+	debounce = pinconf_to_config_argument(config);
+	ep93xx_gpio_int_debounce(gc, offset, debounce ? true : false);
+
+	return 0;
+}
+
+static void ep93xx_irq_print_chip(struct irq_data *data, struct seq_file *p)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
+
+	seq_printf(p, dev_name(gc->parent));
+}
+
+static const struct irq_chip gpio_eic_irq_chip = {
+	.name			= "ep93xx-gpio-eic",
+	.irq_ack		= ep93xx_gpio_irq_ack,
+	.irq_mask		= ep93xx_gpio_irq_mask,
+	.irq_unmask		= ep93xx_gpio_irq_unmask,
+	.irq_mask_ack	= ep93xx_gpio_irq_mask_ack,
+	.irq_set_type	= ep93xx_gpio_irq_type,
+	.irq_print_chip	= ep93xx_irq_print_chip,
+	.flags			= IRQCHIP_IMMUTABLE,
+	GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
+static int ep93xx_gpio_add_bank(struct ep93xx_gpio_chip *egc,
+				struct platform_device *pdev,
+				struct ep93xx_gpio *epg,
+				struct ep93xx_gpio_bank *bank)
+{
+	void __iomem *data = epg->base + bank->data;
+	void __iomem *dir = epg->base + bank->dir;
+	struct gpio_chip *gc = &egc->gc;
+	struct device *dev = &pdev->dev;
+	struct gpio_irq_chip *girq;
+	int err;
+
+	err = bgpio_init(gc, dev, 1, data, NULL, NULL, dir, NULL, 0);
+	if (err)
+		return err;
+
+	gc->label = bank->label;
+	gc->base = bank->base;
+
+	girq = &gc->irq;
+	if (bank->has_irq || bank->has_hierarchical_irq) {
+		gc->set_config = ep93xx_gpio_set_config;
+		egc->eic = devm_kcalloc(dev, 1,
+					sizeof(*egc->eic),
+					GFP_KERNEL);
+		if (!egc->eic)
+			return -ENOMEM;
+		egc->eic->irq_offset = bank->irq;
+		gpio_irq_chip_set_chip(girq, &gpio_eic_irq_chip);
+	}
+
+	if (bank->has_irq) {
+		int ab_parent_irq = platform_get_irq(pdev, 0);
+
+		girq->parent_handler = ep93xx_gpio_ab_irq_handler;
+		girq->num_parents = 1;
+		girq->parents = devm_kcalloc(dev, girq->num_parents,
+					     sizeof(*girq->parents),
+					     GFP_KERNEL);
+		if (!girq->parents)
+			return -ENOMEM;
+		girq->default_type = IRQ_TYPE_NONE;
+		girq->handler = handle_level_irq;
+		girq->parents[0] = ab_parent_irq;
+		girq->first = bank->irq_base;
+	}
+
+	/* Only bank F has especially funky IRQ handling */
+	if (bank->has_hierarchical_irq) {
+		int gpio_irq;
+		int i;
+
+		/*
+		 * FIXME: convert this to use hierarchical IRQ support!
+		 * this requires fixing the root irqchip to be hierarchical.
+		 */
+		girq->parent_handler = ep93xx_gpio_f_irq_handler;
+		girq->num_parents = 8;
+		girq->parents = devm_kcalloc(dev, girq->num_parents,
+					     sizeof(*girq->parents),
+					     GFP_KERNEL);
+		if (!girq->parents)
+			return -ENOMEM;
+		/* Pick resources 1..8 for these IRQs */
+		for (i = 0; i < girq->num_parents; i++) {
+			girq->parents[i] = platform_get_irq(pdev, i + 1);
+			gpio_irq = bank->irq_base + i;
+			irq_set_chip_data(gpio_irq, &epg->gc[5]);
+			irq_set_chip_and_handler(gpio_irq,
+						 girq->chip,
+						 handle_level_irq);
+			irq_clear_status_flags(gpio_irq, IRQ_NOREQUEST);
+		}
+		girq->default_type = IRQ_TYPE_NONE;
+		girq->handler = handle_level_irq;
+		girq->first = bank->irq_base;
+	}
+
+	return devm_gpiochip_add_data(dev, gc, epg);
+}
+
+static int ep93xx_gpio_probe(struct platform_device *pdev)
+{
+	struct ep93xx_gpio *epg;
+	int i;
+
+	epg = devm_kzalloc(&pdev->dev, sizeof(*epg), GFP_KERNEL);
+	if (!epg)
+		return -ENOMEM;
+
+	epg->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(epg->base))
+		return PTR_ERR(epg->base);
+
+	for (i = 0; i < ARRAY_SIZE(ep93xx_gpio_banks); i++) {
+		struct ep93xx_gpio_chip *gc = &epg->gc[i];
+		struct ep93xx_gpio_bank *bank = &ep93xx_gpio_banks[i];
+
+		if (ep93xx_gpio_add_bank(gc, pdev, epg, bank))
+			dev_warn(&pdev->dev, "Unable to add gpio bank %s\n",
+				 bank->label);
+	}
+
+	return 0;
+}
+
+static struct platform_driver ep93xx_gpio_driver = {
+	.driver		= {
+		.name	= "gpio-ep93xx",
+	},
+	.probe		= ep93xx_gpio_probe,
+};
+
+static int __init ep93xx_gpio_init(void)
+{
+	return platform_driver_register(&ep93xx_gpio_driver);
+}
+postcore_initcall(ep93xx_gpio_init);
+
+MODULE_AUTHOR("Ryan Mallon <ryan@bluewatersys.com> "
+		"H Hartley Sweeten <hsweeten@visionengravers.com>");
+MODULE_DESCRIPTION("EP93XX GPIO driver");
+MODULE_LICENSE("GPL");