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, 711 insertions, 0 deletions

diff --git a/drivers/extcon/extcon-rt8973a.c b/drivers/extcon/extcon-rt8973a.c
new file mode 100644
index 000000000..afc9b405d
--- /dev/null
+++ b/drivers/extcon/extcon-rt8973a.c
@@ -0,0 +1,711 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * extcon-rt8973a.c - Richtek RT8973A extcon driver to support USB switches
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd
+ * Author: Chanwoo Choi <cw00.choi@samsung.com>
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/extcon-provider.h>
+
+#include "extcon-rt8973a.h"
+
+#define	DELAY_MS_DEFAULT		20000	/* unit: millisecond */
+
+struct muic_irq {
+	unsigned int irq;
+	const char *name;
+	unsigned int virq;
+};
+
+struct reg_data {
+	u8 reg;
+	u8 mask;
+	u8 val;
+	bool invert;
+};
+
+struct rt8973a_muic_info {
+	struct device *dev;
+	struct extcon_dev *edev;
+
+	struct i2c_client *i2c;
+	struct regmap *regmap;
+
+	struct regmap_irq_chip_data *irq_data;
+	struct muic_irq *muic_irqs;
+	unsigned int num_muic_irqs;
+	int irq;
+	bool irq_attach;
+	bool irq_detach;
+	bool irq_ovp;
+	bool irq_otp;
+	struct work_struct irq_work;
+
+	struct reg_data *reg_data;
+	unsigned int num_reg_data;
+	bool auto_config;
+
+	struct mutex mutex;
+
+	/*
+	 * Use delayed workqueue to detect cable state and then
+	 * notify cable state to notifiee/platform through uevent.
+	 * After completing the booting of platform, the extcon provider
+	 * driver should notify cable state to upper layer.
+	 */
+	struct delayed_work wq_detcable;
+};
+
+/* Default value of RT8973A register to bring up MUIC device. */
+static struct reg_data rt8973a_reg_data[] = {
+	{
+		.reg = RT8973A_REG_CONTROL1,
+		.mask = RT8973A_REG_CONTROL1_ADC_EN_MASK
+			| RT8973A_REG_CONTROL1_USB_CHD_EN_MASK
+			| RT8973A_REG_CONTROL1_CHGTYP_MASK
+			| RT8973A_REG_CONTROL1_SWITCH_OPEN_MASK
+			| RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK
+			| RT8973A_REG_CONTROL1_INTM_MASK,
+		.val = RT8973A_REG_CONTROL1_ADC_EN_MASK
+			| RT8973A_REG_CONTROL1_USB_CHD_EN_MASK
+			| RT8973A_REG_CONTROL1_CHGTYP_MASK,
+		.invert = false,
+	},
+	{ /* sentinel */ }
+};
+
+/* List of detectable cables */
+static const unsigned int rt8973a_extcon_cable[] = {
+	EXTCON_USB,
+	EXTCON_USB_HOST,
+	EXTCON_CHG_USB_SDP,
+	EXTCON_CHG_USB_DCP,
+	EXTCON_JIG,
+	EXTCON_NONE,
+};
+
+/* Define OVP (Over Voltage Protection), OTP (Over Temperature Protection) */
+enum rt8973a_event_type {
+	RT8973A_EVENT_ATTACH = 1,
+	RT8973A_EVENT_DETACH,
+	RT8973A_EVENT_OVP,
+	RT8973A_EVENT_OTP,
+};
+
+/* Define supported accessory type */
+enum rt8973a_muic_acc_type {
+	RT8973A_MUIC_ADC_OTG = 0x0,
+	RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON,
+	RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON,
+	RT8973A_MUIC_ADC_RESERVED_ACC_1,
+	RT8973A_MUIC_ADC_RESERVED_ACC_2,
+	RT8973A_MUIC_ADC_RESERVED_ACC_3,
+	RT8973A_MUIC_ADC_RESERVED_ACC_4,
+	RT8973A_MUIC_ADC_RESERVED_ACC_5,
+	RT8973A_MUIC_ADC_AUDIO_TYPE2,
+	RT8973A_MUIC_ADC_PHONE_POWERED_DEV,
+	RT8973A_MUIC_ADC_UNKNOWN_ACC_1,
+	RT8973A_MUIC_ADC_UNKNOWN_ACC_2,
+	RT8973A_MUIC_ADC_TA,
+	RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
+	RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
+	RT8973A_MUIC_ADC_UNKNOWN_ACC_3,
+	RT8973A_MUIC_ADC_UNKNOWN_ACC_4,
+	RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
+	RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
+	RT8973A_MUIC_ADC_UNKNOWN_ACC_5,
+	RT8973A_MUIC_ADC_OPEN = 0x1f,
+
+	/*
+	 * The below accessories has same ADC value (0x1f).
+	 * So, Device type1 is used to separate specific accessory.
+	 */
+					/* |---------|--ADC| */
+					/* |    [7:5]|[4:0]| */
+	RT8973A_MUIC_ADC_USB = 0x3f,	/* |      001|11111| */
+};
+
+/* List of supported interrupt for RT8973A */
+static struct muic_irq rt8973a_muic_irqs[] = {
+	{ RT8973A_INT1_ATTACH,		"muic-attach" },
+	{ RT8973A_INT1_DETACH,		"muic-detach" },
+	{ RT8973A_INT1_CHGDET,		"muic-chgdet" },
+	{ RT8973A_INT1_DCD_T,		"muic-dcd-t" },
+	{ RT8973A_INT1_OVP,		"muic-ovp" },
+	{ RT8973A_INT1_CONNECT,		"muic-connect" },
+	{ RT8973A_INT1_ADC_CHG,		"muic-adc-chg" },
+	{ RT8973A_INT1_OTP,		"muic-otp" },
+	{ RT8973A_INT2_UVLO,		"muic-uvlo" },
+	{ RT8973A_INT2_POR,		"muic-por" },
+	{ RT8973A_INT2_OTP_FET,		"muic-otp-fet" },
+	{ RT8973A_INT2_OVP_FET,		"muic-ovp-fet" },
+	{ RT8973A_INT2_OCP_LATCH,	"muic-ocp-latch" },
+	{ RT8973A_INT2_OCP,		"muic-ocp" },
+	{ RT8973A_INT2_OVP_OCP,		"muic-ovp-ocp" },
+};
+
+/* Define interrupt list of RT8973A to register regmap_irq */
+static const struct regmap_irq rt8973a_irqs[] = {
+	/* INT1 interrupts */
+	{ .reg_offset = 0, .mask = RT8973A_INT1_ATTACH_MASK, },
+	{ .reg_offset = 0, .mask = RT8973A_INT1_DETACH_MASK, },
+	{ .reg_offset = 0, .mask = RT8973A_INT1_CHGDET_MASK, },
+	{ .reg_offset = 0, .mask = RT8973A_INT1_DCD_T_MASK, },
+	{ .reg_offset = 0, .mask = RT8973A_INT1_OVP_MASK, },
+	{ .reg_offset = 0, .mask = RT8973A_INT1_CONNECT_MASK, },
+	{ .reg_offset = 0, .mask = RT8973A_INT1_ADC_CHG_MASK, },
+	{ .reg_offset = 0, .mask = RT8973A_INT1_OTP_MASK, },
+
+	/* INT2 interrupts */
+	{ .reg_offset = 1, .mask = RT8973A_INT2_UVLOT_MASK,},
+	{ .reg_offset = 1, .mask = RT8973A_INT2_POR_MASK, },
+	{ .reg_offset = 1, .mask = RT8973A_INT2_OTP_FET_MASK, },
+	{ .reg_offset = 1, .mask = RT8973A_INT2_OVP_FET_MASK, },
+	{ .reg_offset = 1, .mask = RT8973A_INT2_OCP_LATCH_MASK, },
+	{ .reg_offset = 1, .mask = RT8973A_INT2_OCP_MASK, },
+	{ .reg_offset = 1, .mask = RT8973A_INT2_OVP_OCP_MASK, },
+};
+
+static const struct regmap_irq_chip rt8973a_muic_irq_chip = {
+	.name			= "rt8973a",
+	.status_base		= RT8973A_REG_INT1,
+	.mask_base		= RT8973A_REG_INTM1,
+	.num_regs		= 2,
+	.irqs			= rt8973a_irqs,
+	.num_irqs		= ARRAY_SIZE(rt8973a_irqs),
+};
+
+/* Define regmap configuration of RT8973A for I2C communication  */
+static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case RT8973A_REG_INTM1:
+	case RT8973A_REG_INTM2:
+		return true;
+	default:
+		break;
+	}
+	return false;
+}
+
+static const struct regmap_config rt8973a_muic_regmap_config = {
+	.reg_bits	= 8,
+	.val_bits	= 8,
+	.volatile_reg	= rt8973a_muic_volatile_reg,
+	.max_register	= RT8973A_REG_END,
+};
+
+/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
+static int rt8973a_muic_set_path(struct rt8973a_muic_info *info,
+				unsigned int con_sw, bool attached)
+{
+	int ret;
+
+	/*
+	 * Don't need to set h/w path according to cable type
+	 * if Auto-configuration mode of CONTROL1 register is true.
+	 */
+	if (info->auto_config)
+		return 0;
+
+	if (!attached)
+		con_sw	= DM_DP_SWITCH_UART;
+
+	switch (con_sw) {
+	case DM_DP_SWITCH_OPEN:
+	case DM_DP_SWITCH_USB:
+	case DM_DP_SWITCH_UART:
+		ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1,
+					RT8973A_REG_MANUAL_SW1_DP_MASK |
+					RT8973A_REG_MANUAL_SW1_DM_MASK,
+					con_sw);
+		if (ret < 0) {
+			dev_err(info->dev,
+				"cannot update DM_CON/DP_CON switch\n");
+			return ret;
+		}
+		break;
+	default:
+		dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
+				con_sw);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info)
+{
+	unsigned int adc, dev1;
+	int ret, cable_type;
+
+	/* Read ADC value according to external cable or button */
+	ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc);
+	if (ret) {
+		dev_err(info->dev, "failed to read ADC register\n");
+		return ret;
+	}
+	cable_type = adc & RT8973A_REG_ADC_MASK;
+
+	/* Read Device 1 reigster to identify correct cable type */
+	ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1);
+	if (ret) {
+		dev_err(info->dev, "failed to read DEV1 register\n");
+		return ret;
+	}
+
+	switch (adc) {
+	case RT8973A_MUIC_ADC_OPEN:
+		if (dev1 & RT8973A_REG_DEV1_USB_MASK)
+			cable_type = RT8973A_MUIC_ADC_USB;
+		else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK)
+			cable_type = RT8973A_MUIC_ADC_TA;
+		else
+			cable_type = RT8973A_MUIC_ADC_OPEN;
+		break;
+	default:
+		break;
+	}
+
+	return cable_type;
+}
+
+static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info,
+					enum rt8973a_event_type event)
+{
+	static unsigned int prev_cable_type;
+	unsigned int con_sw = DM_DP_SWITCH_UART;
+	int ret, cable_type;
+	unsigned int id;
+	bool attached = false;
+
+	switch (event) {
+	case RT8973A_EVENT_ATTACH:
+		cable_type = rt8973a_muic_get_cable_type(info);
+		attached = true;
+		break;
+	case RT8973A_EVENT_DETACH:
+		cable_type = prev_cable_type;
+		attached = false;
+		break;
+	case RT8973A_EVENT_OVP:
+	case RT8973A_EVENT_OTP:
+		dev_warn(info->dev,
+			"happen Over %s issue. Need to disconnect all cables\n",
+			event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature");
+		cable_type = prev_cable_type;
+		attached = false;
+		break;
+	default:
+		dev_err(info->dev,
+			"Cannot handle this event (event:%d)\n", event);
+		return -EINVAL;
+	}
+	prev_cable_type = cable_type;
+
+	switch (cable_type) {
+	case RT8973A_MUIC_ADC_OTG:
+		id = EXTCON_USB_HOST;
+		con_sw = DM_DP_SWITCH_USB;
+		break;
+	case RT8973A_MUIC_ADC_TA:
+		id = EXTCON_CHG_USB_DCP;
+		con_sw = DM_DP_SWITCH_OPEN;
+		break;
+	case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
+	case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
+		id = EXTCON_JIG;
+		con_sw = DM_DP_SWITCH_USB;
+		break;
+	case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
+	case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
+		id = EXTCON_JIG;
+		con_sw = DM_DP_SWITCH_UART;
+		break;
+	case RT8973A_MUIC_ADC_USB:
+		id = EXTCON_USB;
+		con_sw = DM_DP_SWITCH_USB;
+		break;
+	case RT8973A_MUIC_ADC_OPEN:
+		return 0;
+	case RT8973A_MUIC_ADC_UNKNOWN_ACC_1:
+	case RT8973A_MUIC_ADC_UNKNOWN_ACC_2:
+	case RT8973A_MUIC_ADC_UNKNOWN_ACC_3:
+	case RT8973A_MUIC_ADC_UNKNOWN_ACC_4:
+	case RT8973A_MUIC_ADC_UNKNOWN_ACC_5:
+		dev_warn(info->dev,
+			"Unknown accessory type (adc:0x%x)\n", cable_type);
+		return 0;
+	case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON:
+	case RT8973A_MUIC_ADC_AUDIO_TYPE2:
+		dev_warn(info->dev,
+			"Audio device/button type (adc:0x%x)\n", cable_type);
+		return 0;
+	case RT8973A_MUIC_ADC_RESERVED_ACC_1:
+	case RT8973A_MUIC_ADC_RESERVED_ACC_2:
+	case RT8973A_MUIC_ADC_RESERVED_ACC_3:
+	case RT8973A_MUIC_ADC_RESERVED_ACC_4:
+	case RT8973A_MUIC_ADC_RESERVED_ACC_5:
+	case RT8973A_MUIC_ADC_PHONE_POWERED_DEV:
+		return 0;
+	default:
+		dev_err(info->dev,
+			"Cannot handle this cable_type (adc:0x%x)\n",
+			cable_type);
+		return -EINVAL;
+	}
+
+	/* Change internal hardware path(DM_CON/DP_CON) */
+	ret = rt8973a_muic_set_path(info, con_sw, attached);
+	if (ret < 0)
+		return ret;
+
+	/* Change the state of external accessory */
+	extcon_set_state_sync(info->edev, id, attached);
+	if (id == EXTCON_USB)
+		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
+					attached);
+
+	return 0;
+}
+
+static void rt8973a_muic_irq_work(struct work_struct *work)
+{
+	struct rt8973a_muic_info *info = container_of(work,
+			struct rt8973a_muic_info, irq_work);
+	int ret = 0;
+
+	if (!info->edev)
+		return;
+
+	mutex_lock(&info->mutex);
+
+	/* Detect attached or detached cables */
+	if (info->irq_attach) {
+		ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH);
+		info->irq_attach = false;
+	}
+
+	if (info->irq_detach) {
+		ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_DETACH);
+		info->irq_detach = false;
+	}
+
+	if (info->irq_ovp) {
+		ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OVP);
+		info->irq_ovp = false;
+	}
+
+	if (info->irq_otp) {
+		ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OTP);
+		info->irq_otp = false;
+	}
+
+	if (ret < 0)
+		dev_err(info->dev, "failed to handle MUIC interrupt\n");
+
+	mutex_unlock(&info->mutex);
+}
+
+static irqreturn_t rt8973a_muic_irq_handler(int irq, void *data)
+{
+	struct rt8973a_muic_info *info = data;
+	int i, irq_type = -1;
+
+	for (i = 0; i < info->num_muic_irqs; i++)
+		if (irq == info->muic_irqs[i].virq)
+			irq_type = info->muic_irqs[i].irq;
+
+	switch (irq_type) {
+	case RT8973A_INT1_ATTACH:
+		info->irq_attach = true;
+		break;
+	case RT8973A_INT1_DETACH:
+		info->irq_detach = true;
+		break;
+	case RT8973A_INT1_OVP:
+		info->irq_ovp = true;
+		break;
+	case RT8973A_INT1_OTP:
+		info->irq_otp = true;
+		break;
+	case RT8973A_INT1_CHGDET:
+	case RT8973A_INT1_DCD_T:
+	case RT8973A_INT1_CONNECT:
+	case RT8973A_INT1_ADC_CHG:
+	case RT8973A_INT2_UVLO:
+	case RT8973A_INT2_POR:
+	case RT8973A_INT2_OTP_FET:
+	case RT8973A_INT2_OVP_FET:
+	case RT8973A_INT2_OCP_LATCH:
+	case RT8973A_INT2_OCP:
+	case RT8973A_INT2_OVP_OCP:
+	default:
+		dev_dbg(info->dev,
+			"Cannot handle this interrupt (%d)\n", irq_type);
+		break;
+	}
+
+	schedule_work(&info->irq_work);
+
+	return IRQ_HANDLED;
+}
+
+static void rt8973a_muic_detect_cable_wq(struct work_struct *work)
+{
+	struct rt8973a_muic_info *info = container_of(to_delayed_work(work),
+				struct rt8973a_muic_info, wq_detcable);
+	int ret;
+
+	/* Notify the state of connector cable or not  */
+	ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH);
+	if (ret < 0)
+		dev_warn(info->dev, "failed to detect cable state\n");
+}
+
+static void rt8973a_init_dev_type(struct rt8973a_muic_info *info)
+{
+	unsigned int data, vendor_id, version_id;
+	int i, ret;
+
+	/* To test I2C, Print version_id and vendor_id of RT8973A */
+	ret = regmap_read(info->regmap, RT8973A_REG_DEVICE_ID, &data);
+	if (ret) {
+		dev_err(info->dev,
+			"failed to read DEVICE_ID register: %d\n", ret);
+		return;
+	}
+
+	vendor_id = ((data & RT8973A_REG_DEVICE_ID_VENDOR_MASK) >>
+				RT8973A_REG_DEVICE_ID_VENDOR_SHIFT);
+	version_id = ((data & RT8973A_REG_DEVICE_ID_VERSION_MASK) >>
+				RT8973A_REG_DEVICE_ID_VERSION_SHIFT);
+
+	dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
+			    version_id, vendor_id);
+
+	/* Initiazle the register of RT8973A device to bring-up */
+	for (i = 0; i < info->num_reg_data; i++) {
+		u8 reg = info->reg_data[i].reg;
+		u8 mask = info->reg_data[i].mask;
+		u8 val = 0;
+
+		if (info->reg_data[i].invert)
+			val = ~info->reg_data[i].val;
+		else
+			val = info->reg_data[i].val;
+
+		regmap_update_bits(info->regmap, reg, mask, val);
+	}
+
+	/* Check whether RT8973A is auto switching mode or not */
+	ret = regmap_read(info->regmap, RT8973A_REG_CONTROL1, &data);
+	if (ret) {
+		dev_err(info->dev,
+			"failed to read CONTROL1 register: %d\n", ret);
+		return;
+	}
+
+	data &= RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK;
+	if (data) {
+		info->auto_config = true;
+		dev_info(info->dev,
+			"Enable Auto-configuration for internal path\n");
+	}
+}
+
+static int rt8973a_muic_i2c_probe(struct i2c_client *i2c)
+{
+	struct device_node *np = i2c->dev.of_node;
+	struct rt8973a_muic_info *info;
+	int i, ret, irq_flags;
+
+	if (!np)
+		return -EINVAL;
+
+	info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+	i2c_set_clientdata(i2c, info);
+
+	info->dev = &i2c->dev;
+	info->i2c = i2c;
+	info->irq = i2c->irq;
+	info->muic_irqs = rt8973a_muic_irqs;
+	info->num_muic_irqs = ARRAY_SIZE(rt8973a_muic_irqs);
+	info->reg_data = rt8973a_reg_data;
+	info->num_reg_data = ARRAY_SIZE(rt8973a_reg_data);
+
+	mutex_init(&info->mutex);
+
+	INIT_WORK(&info->irq_work, rt8973a_muic_irq_work);
+
+	info->regmap = devm_regmap_init_i2c(i2c, &rt8973a_muic_regmap_config);
+	if (IS_ERR(info->regmap)) {
+		ret = PTR_ERR(info->regmap);
+		dev_err(info->dev, "failed to allocate register map: %d\n",
+				   ret);
+		return ret;
+	}
+
+	/* Support irq domain for RT8973A MUIC device */
+	irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
+	ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
+				  &rt8973a_muic_irq_chip, &info->irq_data);
+	if (ret != 0) {
+		dev_err(info->dev, "failed to add irq_chip (irq:%d, err:%d)\n",
+				    info->irq, ret);
+		return ret;
+	}
+
+	for (i = 0; i < info->num_muic_irqs; i++) {
+		struct muic_irq *muic_irq = &info->muic_irqs[i];
+		int virq = 0;
+
+		virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
+		if (virq <= 0)
+			return -EINVAL;
+		muic_irq->virq = virq;
+
+		ret = devm_request_threaded_irq(info->dev, virq, NULL,
+						rt8973a_muic_irq_handler,
+						IRQF_NO_SUSPEND | IRQF_ONESHOT,
+						muic_irq->name, info);
+		if (ret) {
+			dev_err(info->dev,
+				"failed: irq request (IRQ: %d, error :%d)\n",
+				muic_irq->irq, ret);
+			return ret;
+		}
+	}
+
+	/* Allocate extcon device */
+	info->edev = devm_extcon_dev_allocate(info->dev, rt8973a_extcon_cable);
+	if (IS_ERR(info->edev)) {
+		dev_err(info->dev, "failed to allocate memory for extcon\n");
+		return -ENOMEM;
+	}
+
+	/* Register extcon device */
+	ret = devm_extcon_dev_register(info->dev, info->edev);
+	if (ret) {
+		dev_err(info->dev, "failed to register extcon device\n");
+		return ret;
+	}
+
+	/*
+	 * Detect accessory after completing the initialization of platform
+	 *
+	 * - Use delayed workqueue to detect cable state and then
+	 * notify cable state to notifiee/platform through uevent.
+	 * After completing the booting of platform, the extcon provider
+	 * driver should notify cable state to upper layer.
+	 */
+	INIT_DELAYED_WORK(&info->wq_detcable, rt8973a_muic_detect_cable_wq);
+	queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
+			msecs_to_jiffies(DELAY_MS_DEFAULT));
+
+	/* Initialize RT8973A device and print vendor id and version id */
+	rt8973a_init_dev_type(info);
+
+	return 0;
+}
+
+static void rt8973a_muic_i2c_remove(struct i2c_client *i2c)
+{
+	struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
+
+	regmap_del_irq_chip(info->irq, info->irq_data);
+}
+
+static const struct of_device_id rt8973a_dt_match[] = {
+	{ .compatible = "richtek,rt8973a-muic" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, rt8973a_dt_match);
+
+#ifdef CONFIG_PM_SLEEP
+static int rt8973a_muic_suspend(struct device *dev)
+{
+	struct i2c_client *i2c = to_i2c_client(dev);
+	struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
+
+	enable_irq_wake(info->irq);
+
+	return 0;
+}
+
+static int rt8973a_muic_resume(struct device *dev)
+{
+	struct i2c_client *i2c = to_i2c_client(dev);
+	struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
+
+	disable_irq_wake(info->irq);
+
+	return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(rt8973a_muic_pm_ops,
+			 rt8973a_muic_suspend, rt8973a_muic_resume);
+
+static const struct i2c_device_id rt8973a_i2c_id[] = {
+	{ "rt8973a", TYPE_RT8973A },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, rt8973a_i2c_id);
+
+static struct i2c_driver rt8973a_muic_i2c_driver = {
+	.driver		= {
+		.name	= "rt8973a",
+		.pm	= &rt8973a_muic_pm_ops,
+		.of_match_table = rt8973a_dt_match,
+	},
+	.probe_new = rt8973a_muic_i2c_probe,
+	.remove	= rt8973a_muic_i2c_remove,
+	.id_table = rt8973a_i2c_id,
+};
+
+static int __init rt8973a_muic_i2c_init(void)
+{
+	return i2c_add_driver(&rt8973a_muic_i2c_driver);
+}
+subsys_initcall(rt8973a_muic_i2c_init);
+
+MODULE_DESCRIPTION("Richtek RT8973A Extcon driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_LICENSE("GPL");