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, 446 insertions, 0 deletions

diff --git a/drivers/gpio/gpio-ts5500.c b/drivers/gpio/gpio-ts5500.c
new file mode 100644
index 000000000..8e03614c7
--- /dev/null
+++ b/drivers/gpio/gpio-ts5500.c
@@ -0,0 +1,446 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Digital I/O driver for Technologic Systems TS-5500
+ *
+ * Copyright (c) 2012 Savoir-faire Linux Inc.
+ *	Vivien Didelot <vivien.didelot@savoirfairelinux.com>
+ *
+ * Technologic Systems platforms have pin blocks, exposing several Digital
+ * Input/Output lines (DIO). This driver aims to support single pin blocks.
+ * In that sense, the support is not limited to the TS-5500 blocks.
+ * Actually, the following platforms have DIO support:
+ *
+ * TS-5500:
+ *   Documentation: https://docs.embeddedts.com/TS-5500
+ *   Blocks: DIO1, DIO2 and LCD port.
+ *
+ * TS-5600:
+ *   Documentation: https://docs.embeddedts.com/TS-5600
+ *   Blocks: LCD port (identical to TS-5500 LCD).
+ */
+
+#include <linux/bitops.h>
+#include <linux/gpio/driver.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+/* List of supported Technologic Systems platforms DIO blocks */
+enum ts5500_blocks { TS5500_DIO1, TS5500_DIO2, TS5500_LCD, TS5600_LCD };
+
+struct ts5500_priv {
+	const struct ts5500_dio *pinout;
+	struct gpio_chip gpio_chip;
+	spinlock_t lock;
+	bool strap;
+	u8 hwirq;
+};
+
+/*
+ * Hex 7D is used to control several blocks (e.g. DIO2 and LCD port).
+ * This flag ensures that the region has been requested by this driver.
+ */
+static bool hex7d_reserved;
+
+/*
+ * This structure is used to describe capabilities of DIO lines,
+ * such as available directions and connected interrupt (if any).
+ */
+struct ts5500_dio {
+	const u8 value_addr;
+	const u8 value_mask;
+	const u8 control_addr;
+	const u8 control_mask;
+	const bool no_input;
+	const bool no_output;
+	const u8 irq;
+};
+
+#define TS5500_DIO_IN_OUT(vaddr, vbit, caddr, cbit)	\
+	{						\
+		.value_addr = vaddr,			\
+		.value_mask = BIT(vbit),		\
+		.control_addr = caddr,			\
+		.control_mask = BIT(cbit),		\
+	}
+
+#define TS5500_DIO_IN(addr, bit)		\
+	{					\
+		.value_addr = addr,		\
+		.value_mask = BIT(bit),		\
+		.no_output = true,		\
+	}
+
+#define TS5500_DIO_IN_IRQ(addr, bit, _irq)	\
+	{					\
+		.value_addr = addr,		\
+		.value_mask = BIT(bit),		\
+		.no_output = true,		\
+		.irq = _irq,			\
+	}
+
+#define TS5500_DIO_OUT(addr, bit)		\
+	{					\
+		.value_addr = addr,		\
+		.value_mask = BIT(bit),		\
+		.no_input = true,		\
+	}
+
+/*
+ * Input/Output DIO lines are programmed in groups of 4. Their values are
+ * available through 4 consecutive bits in a value port, whereas the direction
+ * of these 4 lines is driven by only 1 bit in a control port.
+ */
+#define TS5500_DIO_GROUP(vaddr, vbitfrom, caddr, cbit)		\
+	TS5500_DIO_IN_OUT(vaddr, vbitfrom + 0, caddr, cbit),	\
+	TS5500_DIO_IN_OUT(vaddr, vbitfrom + 1, caddr, cbit),	\
+	TS5500_DIO_IN_OUT(vaddr, vbitfrom + 2, caddr, cbit),	\
+	TS5500_DIO_IN_OUT(vaddr, vbitfrom + 3, caddr, cbit)
+
+/*
+ * TS-5500 DIO1 block
+ *
+ *  value    control  dir    hw
+ *  addr bit addr bit in out irq name     pin offset
+ *
+ *  0x7b  0  0x7a  0  x   x      DIO1_0   1   0
+ *  0x7b  1  0x7a  0  x   x      DIO1_1   3   1
+ *  0x7b  2  0x7a  0  x   x      DIO1_2   5   2
+ *  0x7b  3  0x7a  0  x   x      DIO1_3   7   3
+ *  0x7b  4  0x7a  1  x   x      DIO1_4   9   4
+ *  0x7b  5  0x7a  1  x   x      DIO1_5   11  5
+ *  0x7b  6  0x7a  1  x   x      DIO1_6   13  6
+ *  0x7b  7  0x7a  1  x   x      DIO1_7   15  7
+ *  0x7c  0  0x7a  5  x   x      DIO1_8   4   8
+ *  0x7c  1  0x7a  5  x   x      DIO1_9   6   9
+ *  0x7c  2  0x7a  5  x   x      DIO1_10  8   10
+ *  0x7c  3  0x7a  5  x   x      DIO1_11  10  11
+ *  0x7c  4           x          DIO1_12  12  12
+ *  0x7c  5           x      7   DIO1_13  14  13
+ */
+static const struct ts5500_dio ts5500_dio1[] = {
+	TS5500_DIO_GROUP(0x7b, 0, 0x7a, 0),
+	TS5500_DIO_GROUP(0x7b, 4, 0x7a, 1),
+	TS5500_DIO_GROUP(0x7c, 0, 0x7a, 5),
+	TS5500_DIO_IN(0x7c, 4),
+	TS5500_DIO_IN_IRQ(0x7c, 5, 7),
+};
+
+/*
+ * TS-5500 DIO2 block
+ *
+ *  value    control  dir    hw
+ *  addr bit addr bit in out irq name     pin offset
+ *
+ *  0x7e  0  0x7d  0  x   x      DIO2_0   1   0
+ *  0x7e  1  0x7d  0  x   x      DIO2_1   3   1
+ *  0x7e  2  0x7d  0  x   x      DIO2_2   5   2
+ *  0x7e  3  0x7d  0  x   x      DIO2_3   7   3
+ *  0x7e  4  0x7d  1  x   x      DIO2_4   9   4
+ *  0x7e  5  0x7d  1  x   x      DIO2_5   11  5
+ *  0x7e  6  0x7d  1  x   x      DIO2_6   13  6
+ *  0x7e  7  0x7d  1  x   x      DIO2_7   15  7
+ *  0x7f  0  0x7d  5  x   x      DIO2_8   4   8
+ *  0x7f  1  0x7d  5  x   x      DIO2_9   6   9
+ *  0x7f  2  0x7d  5  x   x      DIO2_10  8   10
+ *  0x7f  3  0x7d  5  x   x      DIO2_11  10  11
+ *  0x7f  4           x      6   DIO2_13  14  12
+ */
+static const struct ts5500_dio ts5500_dio2[] = {
+	TS5500_DIO_GROUP(0x7e, 0, 0x7d, 0),
+	TS5500_DIO_GROUP(0x7e, 4, 0x7d, 1),
+	TS5500_DIO_GROUP(0x7f, 0, 0x7d, 5),
+	TS5500_DIO_IN_IRQ(0x7f, 4, 6),
+};
+
+/*
+ * TS-5500 LCD port used as DIO block
+ * TS-5600 LCD port is identical
+ *
+ *  value    control  dir    hw
+ *  addr bit addr bit in out irq name    pin offset
+ *
+ *  0x72  0  0x7d  2  x   x      LCD_0   8   0
+ *  0x72  1  0x7d  2  x   x      LCD_1   7   1
+ *  0x72  2  0x7d  2  x   x      LCD_2   10  2
+ *  0x72  3  0x7d  2  x   x      LCD_3   9   3
+ *  0x72  4  0x7d  3  x   x      LCD_4   12  4
+ *  0x72  5  0x7d  3  x   x      LCD_5   11  5
+ *  0x72  6  0x7d  3  x   x      LCD_6   14  6
+ *  0x72  7  0x7d  3  x   x      LCD_7   13  7
+ *  0x73  0               x      LCD_EN  5   8
+ *  0x73  6           x          LCD_WR  6   9
+ *  0x73  7           x      1   LCD_RS  3   10
+ */
+static const struct ts5500_dio ts5500_lcd[] = {
+	TS5500_DIO_GROUP(0x72, 0, 0x7d, 2),
+	TS5500_DIO_GROUP(0x72, 4, 0x7d, 3),
+	TS5500_DIO_OUT(0x73, 0),
+	TS5500_DIO_IN(0x73, 6),
+	TS5500_DIO_IN_IRQ(0x73, 7, 1),
+};
+
+static inline void ts5500_set_mask(u8 mask, u8 addr)
+{
+	u8 val = inb(addr);
+	val |= mask;
+	outb(val, addr);
+}
+
+static inline void ts5500_clear_mask(u8 mask, u8 addr)
+{
+	u8 val = inb(addr);
+	val &= ~mask;
+	outb(val, addr);
+}
+
+static int ts5500_gpio_input(struct gpio_chip *chip, unsigned offset)
+{
+	struct ts5500_priv *priv = gpiochip_get_data(chip);
+	const struct ts5500_dio line = priv->pinout[offset];
+	unsigned long flags;
+
+	if (line.no_input)
+		return -ENXIO;
+
+	if (line.no_output)
+		return 0;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	ts5500_clear_mask(line.control_mask, line.control_addr);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+static int ts5500_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+	struct ts5500_priv *priv = gpiochip_get_data(chip);
+	const struct ts5500_dio line = priv->pinout[offset];
+
+	return !!(inb(line.value_addr) & line.value_mask);
+}
+
+static int ts5500_gpio_output(struct gpio_chip *chip, unsigned offset, int val)
+{
+	struct ts5500_priv *priv = gpiochip_get_data(chip);
+	const struct ts5500_dio line = priv->pinout[offset];
+	unsigned long flags;
+
+	if (line.no_output)
+		return -ENXIO;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	if (!line.no_input)
+		ts5500_set_mask(line.control_mask, line.control_addr);
+
+	if (val)
+		ts5500_set_mask(line.value_mask, line.value_addr);
+	else
+		ts5500_clear_mask(line.value_mask, line.value_addr);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+static void ts5500_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
+{
+	struct ts5500_priv *priv = gpiochip_get_data(chip);
+	const struct ts5500_dio line = priv->pinout[offset];
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	if (val)
+		ts5500_set_mask(line.value_mask, line.value_addr);
+	else
+		ts5500_clear_mask(line.value_mask, line.value_addr);
+	spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+static int ts5500_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+	struct ts5500_priv *priv = gpiochip_get_data(chip);
+	const struct ts5500_dio *block = priv->pinout;
+	const struct ts5500_dio line = block[offset];
+
+	/* Only one pin is connected to an interrupt */
+	if (line.irq)
+		return line.irq;
+
+	/* As this pin is input-only, we may strap it to another in/out pin */
+	if (priv->strap)
+		return priv->hwirq;
+
+	return -ENXIO;
+}
+
+static int ts5500_enable_irq(struct ts5500_priv *priv)
+{
+	int ret = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	if (priv->hwirq == 7)
+		ts5500_set_mask(BIT(7), 0x7a); /* DIO1_13 on IRQ7 */
+	else if (priv->hwirq == 6)
+		ts5500_set_mask(BIT(7), 0x7d); /* DIO2_13 on IRQ6 */
+	else if (priv->hwirq == 1)
+		ts5500_set_mask(BIT(6), 0x7d); /* LCD_RS on IRQ1 */
+	else
+		ret = -EINVAL;
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return ret;
+}
+
+static void ts5500_disable_irq(struct ts5500_priv *priv)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	if (priv->hwirq == 7)
+		ts5500_clear_mask(BIT(7), 0x7a); /* DIO1_13 on IRQ7 */
+	else if (priv->hwirq == 6)
+		ts5500_clear_mask(BIT(7), 0x7d); /* DIO2_13 on IRQ6 */
+	else if (priv->hwirq == 1)
+		ts5500_clear_mask(BIT(6), 0x7d); /* LCD_RS on IRQ1 */
+	else
+		dev_err(priv->gpio_chip.parent, "invalid hwirq %d\n",
+			priv->hwirq);
+	spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+static int ts5500_dio_probe(struct platform_device *pdev)
+{
+	enum ts5500_blocks block = platform_get_device_id(pdev)->driver_data;
+	struct device *dev = &pdev->dev;
+	const char *name = dev_name(dev);
+	struct ts5500_priv *priv;
+	unsigned long flags;
+	int ret;
+
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
+		return ret;
+
+	priv = devm_kzalloc(dev, sizeof(struct ts5500_priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, priv);
+	priv->hwirq = ret;
+	spin_lock_init(&priv->lock);
+
+	priv->gpio_chip.owner = THIS_MODULE;
+	priv->gpio_chip.label = name;
+	priv->gpio_chip.parent = dev;
+	priv->gpio_chip.direction_input = ts5500_gpio_input;
+	priv->gpio_chip.direction_output = ts5500_gpio_output;
+	priv->gpio_chip.get = ts5500_gpio_get;
+	priv->gpio_chip.set = ts5500_gpio_set;
+	priv->gpio_chip.to_irq = ts5500_gpio_to_irq;
+	priv->gpio_chip.base = -1;
+
+	switch (block) {
+	case TS5500_DIO1:
+		priv->pinout = ts5500_dio1;
+		priv->gpio_chip.ngpio = ARRAY_SIZE(ts5500_dio1);
+
+		if (!devm_request_region(dev, 0x7a, 3, name)) {
+			dev_err(dev, "failed to request %s ports\n", name);
+			return -EBUSY;
+		}
+		break;
+	case TS5500_DIO2:
+		priv->pinout = ts5500_dio2;
+		priv->gpio_chip.ngpio = ARRAY_SIZE(ts5500_dio2);
+
+		if (!devm_request_region(dev, 0x7e, 2, name)) {
+			dev_err(dev, "failed to request %s ports\n", name);
+			return -EBUSY;
+		}
+
+		if (hex7d_reserved)
+			break;
+
+		if (!devm_request_region(dev, 0x7d, 1, name)) {
+			dev_err(dev, "failed to request %s 7D\n", name);
+			return -EBUSY;
+		}
+
+		hex7d_reserved = true;
+		break;
+	case TS5500_LCD:
+	case TS5600_LCD:
+		priv->pinout = ts5500_lcd;
+		priv->gpio_chip.ngpio = ARRAY_SIZE(ts5500_lcd);
+
+		if (!devm_request_region(dev, 0x72, 2, name)) {
+			dev_err(dev, "failed to request %s ports\n", name);
+			return -EBUSY;
+		}
+
+		if (!hex7d_reserved) {
+			if (!devm_request_region(dev, 0x7d, 1, name)) {
+				dev_err(dev, "failed to request %s 7D\n", name);
+				return -EBUSY;
+			}
+
+			hex7d_reserved = true;
+		}
+
+		/* Ensure usage of LCD port as DIO */
+		spin_lock_irqsave(&priv->lock, flags);
+		ts5500_clear_mask(BIT(4), 0x7d);
+		spin_unlock_irqrestore(&priv->lock, flags);
+		break;
+	}
+
+	ret = devm_gpiochip_add_data(dev, &priv->gpio_chip, priv);
+	if (ret) {
+		dev_err(dev, "failed to register the gpio chip\n");
+		return ret;
+	}
+
+	ret = ts5500_enable_irq(priv);
+	if (ret) {
+		dev_err(dev, "invalid interrupt %d\n", priv->hwirq);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int ts5500_dio_remove(struct platform_device *pdev)
+{
+	struct ts5500_priv *priv = platform_get_drvdata(pdev);
+
+	ts5500_disable_irq(priv);
+
+	return 0;
+}
+
+static const struct platform_device_id ts5500_dio_ids[] = {
+	{ "ts5500-dio1", TS5500_DIO1 },
+	{ "ts5500-dio2", TS5500_DIO2 },
+	{ "ts5500-dio-lcd", TS5500_LCD },
+	{ "ts5600-dio-lcd", TS5600_LCD },
+	{ }
+};
+MODULE_DEVICE_TABLE(platform, ts5500_dio_ids);
+
+static struct platform_driver ts5500_dio_driver = {
+	.driver = {
+		.name = "ts5500-dio",
+	},
+	.probe = ts5500_dio_probe,
+	.remove = ts5500_dio_remove,
+	.id_table = ts5500_dio_ids,
+};
+
+module_platform_driver(ts5500_dio_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Savoir-faire Linux Inc. <kernel@savoirfairelinux.com>");
+MODULE_DESCRIPTION("Technologic Systems TS-5500 Digital I/O driver");