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, 615 insertions, 0 deletions

diff --git a/drivers/counter/ti-ecap-capture.c b/drivers/counter/ti-ecap-capture.c
new file mode 100644
index 000000000..fb1cb1774
--- /dev/null
+++ b/drivers/counter/ti-ecap-capture.c
@@ -0,0 +1,615 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * ECAP Capture driver
+ *
+ * Copyright (C) 2022 Julien Panis <jpanis@baylibre.com>
+ */
+
+#include <linux/atomic.h>
+#include <linux/clk.h>
+#include <linux/counter.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+
+#define ECAP_DRV_NAME "ecap"
+
+/* ECAP event IDs */
+#define ECAP_CEVT1		0
+#define ECAP_CEVT2		1
+#define ECAP_CEVT3		2
+#define ECAP_CEVT4		3
+#define ECAP_CNTOVF		4
+
+#define ECAP_CEVT_LAST		ECAP_CEVT4
+#define ECAP_NB_CEVT		(ECAP_CEVT_LAST + 1)
+
+#define ECAP_EVT_LAST		ECAP_CNTOVF
+#define ECAP_NB_EVT		(ECAP_EVT_LAST + 1)
+
+/* Registers */
+#define ECAP_TSCNT_REG			0x00
+
+#define ECAP_CAP_REG(i)		(((i) << 2) + 0x08)
+
+#define ECAP_ECCTL_REG			0x28
+#define ECAP_CAPPOL_BIT(i)		BIT((i) << 1)
+#define ECAP_EV_MODE_MASK		GENMASK(7, 0)
+#define ECAP_CAPLDEN_BIT		BIT(8)
+#define ECAP_CONT_ONESHT_BIT		BIT(16)
+#define ECAP_STOPVALUE_MASK		GENMASK(18, 17)
+#define ECAP_TSCNTSTP_BIT		BIT(20)
+#define ECAP_SYNCO_DIS_MASK		GENMASK(23, 22)
+#define ECAP_CAP_APWM_BIT		BIT(25)
+#define ECAP_ECCTL_EN_MASK		(ECAP_CAPLDEN_BIT | ECAP_TSCNTSTP_BIT)
+#define ECAP_ECCTL_CFG_MASK		(ECAP_SYNCO_DIS_MASK | ECAP_STOPVALUE_MASK	\
+					| ECAP_ECCTL_EN_MASK | ECAP_CAP_APWM_BIT	\
+					| ECAP_CONT_ONESHT_BIT)
+
+#define ECAP_ECINT_EN_FLG_REG		0x2c
+#define ECAP_EVT_EN_MASK		GENMASK(ECAP_NB_EVT, ECAP_NB_CEVT)
+#define ECAP_EVT_FLG_BIT(i)		BIT((i) + 17)
+
+#define ECAP_ECINT_CLR_FRC_REG	0x30
+#define ECAP_INT_CLR_BIT		BIT(0)
+#define ECAP_EVT_CLR_BIT(i)		BIT((i) + 1)
+#define ECAP_EVT_CLR_MASK		GENMASK(ECAP_NB_EVT, 0)
+
+#define ECAP_PID_REG			0x5c
+
+/* ECAP signals */
+#define ECAP_CLOCK_SIG 0
+#define ECAP_INPUT_SIG 1
+
+static const struct regmap_config ecap_cnt_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.max_register = ECAP_PID_REG,
+};
+
+/**
+ * struct ecap_cnt_dev - device private data structure
+ * @enabled: device state
+ * @lock:    synchronization lock to prevent I/O race conditions
+ * @clk:     device clock
+ * @regmap:  device register map
+ * @nb_ovf:  number of overflows since capture start
+ * @pm_ctx:  device context for PM operations
+ * @pm_ctx.ev_mode:   event mode bits
+ * @pm_ctx.time_cntr: timestamp counter value
+ */
+struct ecap_cnt_dev {
+	bool enabled;
+	struct mutex lock;
+	struct clk *clk;
+	struct regmap *regmap;
+	atomic_t nb_ovf;
+	struct {
+		u8 ev_mode;
+		u32 time_cntr;
+	} pm_ctx;
+};
+
+static u8 ecap_cnt_capture_get_evmode(struct counter_device *counter)
+{
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter);
+	unsigned int regval;
+
+	pm_runtime_get_sync(counter->parent);
+	regmap_read(ecap_dev->regmap, ECAP_ECCTL_REG, &regval);
+	pm_runtime_put_sync(counter->parent);
+
+	return regval;
+}
+
+static void ecap_cnt_capture_set_evmode(struct counter_device *counter, u8 ev_mode)
+{
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter);
+
+	pm_runtime_get_sync(counter->parent);
+	regmap_update_bits(ecap_dev->regmap, ECAP_ECCTL_REG, ECAP_EV_MODE_MASK, ev_mode);
+	pm_runtime_put_sync(counter->parent);
+}
+
+static void ecap_cnt_capture_enable(struct counter_device *counter)
+{
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter);
+
+	pm_runtime_get_sync(counter->parent);
+
+	/* Enable interrupts on events */
+	regmap_update_bits(ecap_dev->regmap, ECAP_ECINT_EN_FLG_REG,
+			   ECAP_EVT_EN_MASK, ECAP_EVT_EN_MASK);
+
+	/* Run counter */
+	regmap_update_bits(ecap_dev->regmap, ECAP_ECCTL_REG, ECAP_ECCTL_CFG_MASK,
+			   ECAP_SYNCO_DIS_MASK | ECAP_STOPVALUE_MASK | ECAP_ECCTL_EN_MASK);
+}
+
+static void ecap_cnt_capture_disable(struct counter_device *counter)
+{
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter);
+
+	/* Stop counter */
+	regmap_update_bits(ecap_dev->regmap, ECAP_ECCTL_REG, ECAP_ECCTL_EN_MASK, 0);
+
+	/* Disable interrupts on events */
+	regmap_update_bits(ecap_dev->regmap, ECAP_ECINT_EN_FLG_REG, ECAP_EVT_EN_MASK, 0);
+
+	pm_runtime_put_sync(counter->parent);
+}
+
+static u32 ecap_cnt_count_get_val(struct counter_device *counter, unsigned int reg)
+{
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter);
+	unsigned int regval;
+
+	pm_runtime_get_sync(counter->parent);
+	regmap_read(ecap_dev->regmap, reg, &regval);
+	pm_runtime_put_sync(counter->parent);
+
+	return regval;
+}
+
+static void ecap_cnt_count_set_val(struct counter_device *counter, unsigned int reg, u32 val)
+{
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter);
+
+	pm_runtime_get_sync(counter->parent);
+	regmap_write(ecap_dev->regmap, reg, val);
+	pm_runtime_put_sync(counter->parent);
+}
+
+static int ecap_cnt_count_read(struct counter_device *counter,
+			       struct counter_count *count, u64 *val)
+{
+	*val = ecap_cnt_count_get_val(counter, ECAP_TSCNT_REG);
+
+	return 0;
+}
+
+static int ecap_cnt_count_write(struct counter_device *counter,
+				struct counter_count *count, u64 val)
+{
+	if (val > U32_MAX)
+		return -ERANGE;
+
+	ecap_cnt_count_set_val(counter, ECAP_TSCNT_REG, val);
+
+	return 0;
+}
+
+static int ecap_cnt_function_read(struct counter_device *counter,
+				  struct counter_count *count,
+				  enum counter_function *function)
+{
+	*function = COUNTER_FUNCTION_INCREASE;
+
+	return 0;
+}
+
+static int ecap_cnt_action_read(struct counter_device *counter,
+				struct counter_count *count,
+				struct counter_synapse *synapse,
+				enum counter_synapse_action *action)
+{
+	*action = (synapse->signal->id == ECAP_CLOCK_SIG) ?
+		   COUNTER_SYNAPSE_ACTION_RISING_EDGE :
+		   COUNTER_SYNAPSE_ACTION_NONE;
+
+	return 0;
+}
+
+static int ecap_cnt_watch_validate(struct counter_device *counter,
+				   const struct counter_watch *watch)
+{
+	if (watch->channel > ECAP_CEVT_LAST)
+		return -EINVAL;
+
+	switch (watch->event) {
+	case COUNTER_EVENT_CAPTURE:
+	case COUNTER_EVENT_OVERFLOW:
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ecap_cnt_clk_get_freq(struct counter_device *counter,
+				 struct counter_signal *signal, u64 *freq)
+{
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter);
+
+	*freq = clk_get_rate(ecap_dev->clk);
+
+	return 0;
+}
+
+static int ecap_cnt_pol_read(struct counter_device *counter,
+			     struct counter_signal *signal,
+			     size_t idx, enum counter_signal_polarity *pol)
+{
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter);
+	int bitval;
+
+	pm_runtime_get_sync(counter->parent);
+	bitval = regmap_test_bits(ecap_dev->regmap, ECAP_ECCTL_REG, ECAP_CAPPOL_BIT(idx));
+	pm_runtime_put_sync(counter->parent);
+
+	*pol = bitval ? COUNTER_SIGNAL_POLARITY_NEGATIVE : COUNTER_SIGNAL_POLARITY_POSITIVE;
+
+	return 0;
+}
+
+static int ecap_cnt_pol_write(struct counter_device *counter,
+			      struct counter_signal *signal,
+			      size_t idx, enum counter_signal_polarity pol)
+{
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter);
+
+	pm_runtime_get_sync(counter->parent);
+	if (pol == COUNTER_SIGNAL_POLARITY_NEGATIVE)
+		regmap_set_bits(ecap_dev->regmap, ECAP_ECCTL_REG, ECAP_CAPPOL_BIT(idx));
+	else
+		regmap_clear_bits(ecap_dev->regmap, ECAP_ECCTL_REG, ECAP_CAPPOL_BIT(idx));
+	pm_runtime_put_sync(counter->parent);
+
+	return 0;
+}
+
+static int ecap_cnt_cap_read(struct counter_device *counter,
+			     struct counter_count *count,
+			     size_t idx, u64 *cap)
+{
+	*cap = ecap_cnt_count_get_val(counter, ECAP_CAP_REG(idx));
+
+	return 0;
+}
+
+static int ecap_cnt_cap_write(struct counter_device *counter,
+			      struct counter_count *count,
+			      size_t idx, u64 cap)
+{
+	if (cap > U32_MAX)
+		return -ERANGE;
+
+	ecap_cnt_count_set_val(counter, ECAP_CAP_REG(idx), cap);
+
+	return 0;
+}
+
+static int ecap_cnt_nb_ovf_read(struct counter_device *counter,
+				struct counter_count *count, u64 *val)
+{
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter);
+
+	*val = atomic_read(&ecap_dev->nb_ovf);
+
+	return 0;
+}
+
+static int ecap_cnt_nb_ovf_write(struct counter_device *counter,
+				 struct counter_count *count, u64 val)
+{
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter);
+
+	if (val > U32_MAX)
+		return -ERANGE;
+
+	atomic_set(&ecap_dev->nb_ovf, val);
+
+	return 0;
+}
+
+static int ecap_cnt_ceiling_read(struct counter_device *counter,
+				 struct counter_count *count, u64 *val)
+{
+	*val = U32_MAX;
+
+	return 0;
+}
+
+static int ecap_cnt_enable_read(struct counter_device *counter,
+				struct counter_count *count, u8 *enable)
+{
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter);
+
+	*enable = ecap_dev->enabled;
+
+	return 0;
+}
+
+static int ecap_cnt_enable_write(struct counter_device *counter,
+				 struct counter_count *count, u8 enable)
+{
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter);
+
+	mutex_lock(&ecap_dev->lock);
+
+	if (enable == ecap_dev->enabled)
+		goto out;
+
+	if (enable)
+		ecap_cnt_capture_enable(counter);
+	else
+		ecap_cnt_capture_disable(counter);
+	ecap_dev->enabled = enable;
+
+out:
+	mutex_unlock(&ecap_dev->lock);
+
+	return 0;
+}
+
+static const struct counter_ops ecap_cnt_ops = {
+	.count_read = ecap_cnt_count_read,
+	.count_write = ecap_cnt_count_write,
+	.function_read = ecap_cnt_function_read,
+	.action_read = ecap_cnt_action_read,
+	.watch_validate = ecap_cnt_watch_validate,
+};
+
+static const enum counter_function ecap_cnt_functions[] = {
+	COUNTER_FUNCTION_INCREASE,
+};
+
+static const enum counter_synapse_action ecap_cnt_clock_actions[] = {
+	COUNTER_SYNAPSE_ACTION_RISING_EDGE,
+};
+
+static const enum counter_synapse_action ecap_cnt_input_actions[] = {
+	COUNTER_SYNAPSE_ACTION_NONE,
+};
+
+static struct counter_comp ecap_cnt_clock_ext[] = {
+	COUNTER_COMP_SIGNAL_U64("frequency", ecap_cnt_clk_get_freq, NULL),
+};
+
+static const enum counter_signal_polarity ecap_cnt_pol_avail[] = {
+	COUNTER_SIGNAL_POLARITY_POSITIVE,
+	COUNTER_SIGNAL_POLARITY_NEGATIVE,
+};
+
+static DEFINE_COUNTER_AVAILABLE(ecap_cnt_pol_available, ecap_cnt_pol_avail);
+static DEFINE_COUNTER_ARRAY_POLARITY(ecap_cnt_pol_array, ecap_cnt_pol_available, ECAP_NB_CEVT);
+
+static struct counter_comp ecap_cnt_signal_ext[] = {
+	COUNTER_COMP_ARRAY_POLARITY(ecap_cnt_pol_read, ecap_cnt_pol_write, ecap_cnt_pol_array),
+};
+
+static struct counter_signal ecap_cnt_signals[] = {
+	{
+		.id = ECAP_CLOCK_SIG,
+		.name = "Clock Signal",
+		.ext = ecap_cnt_clock_ext,
+		.num_ext = ARRAY_SIZE(ecap_cnt_clock_ext),
+	},
+	{
+		.id = ECAP_INPUT_SIG,
+		.name = "Input Signal",
+		.ext = ecap_cnt_signal_ext,
+		.num_ext = ARRAY_SIZE(ecap_cnt_signal_ext),
+	},
+};
+
+static struct counter_synapse ecap_cnt_synapses[] = {
+	{
+		.actions_list = ecap_cnt_clock_actions,
+		.num_actions = ARRAY_SIZE(ecap_cnt_clock_actions),
+		.signal = &ecap_cnt_signals[ECAP_CLOCK_SIG],
+	},
+	{
+		.actions_list = ecap_cnt_input_actions,
+		.num_actions = ARRAY_SIZE(ecap_cnt_input_actions),
+		.signal = &ecap_cnt_signals[ECAP_INPUT_SIG],
+	},
+};
+
+static DEFINE_COUNTER_ARRAY_CAPTURE(ecap_cnt_cap_array, ECAP_NB_CEVT);
+
+static struct counter_comp ecap_cnt_count_ext[] = {
+	COUNTER_COMP_ARRAY_CAPTURE(ecap_cnt_cap_read, ecap_cnt_cap_write, ecap_cnt_cap_array),
+	COUNTER_COMP_COUNT_U64("num_overflows", ecap_cnt_nb_ovf_read, ecap_cnt_nb_ovf_write),
+	COUNTER_COMP_CEILING(ecap_cnt_ceiling_read, NULL),
+	COUNTER_COMP_ENABLE(ecap_cnt_enable_read, ecap_cnt_enable_write),
+};
+
+static struct counter_count ecap_cnt_counts[] = {
+	{
+		.name = "Timestamp Counter",
+		.functions_list = ecap_cnt_functions,
+		.num_functions = ARRAY_SIZE(ecap_cnt_functions),
+		.synapses = ecap_cnt_synapses,
+		.num_synapses = ARRAY_SIZE(ecap_cnt_synapses),
+		.ext = ecap_cnt_count_ext,
+		.num_ext = ARRAY_SIZE(ecap_cnt_count_ext),
+	},
+};
+
+static irqreturn_t ecap_cnt_isr(int irq, void *dev_id)
+{
+	struct counter_device *counter_dev = dev_id;
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter_dev);
+	unsigned int clr = 0;
+	unsigned int flg;
+	int i;
+
+	regmap_read(ecap_dev->regmap, ECAP_ECINT_EN_FLG_REG, &flg);
+
+	/* Check capture events */
+	for (i = 0 ; i < ECAP_NB_CEVT ; i++) {
+		if (flg & ECAP_EVT_FLG_BIT(i)) {
+			counter_push_event(counter_dev, COUNTER_EVENT_CAPTURE, i);
+			clr |= ECAP_EVT_CLR_BIT(i);
+		}
+	}
+
+	/* Check counter overflow */
+	if (flg & ECAP_EVT_FLG_BIT(ECAP_CNTOVF)) {
+		atomic_inc(&ecap_dev->nb_ovf);
+		for (i = 0 ; i < ECAP_NB_CEVT ; i++)
+			counter_push_event(counter_dev, COUNTER_EVENT_OVERFLOW, i);
+		clr |= ECAP_EVT_CLR_BIT(ECAP_CNTOVF);
+	}
+
+	clr |= ECAP_INT_CLR_BIT;
+	regmap_update_bits(ecap_dev->regmap, ECAP_ECINT_CLR_FRC_REG, ECAP_EVT_CLR_MASK, clr);
+
+	return IRQ_HANDLED;
+}
+
+static void ecap_cnt_pm_disable(void *dev)
+{
+	pm_runtime_disable(dev);
+}
+
+static int ecap_cnt_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct ecap_cnt_dev *ecap_dev;
+	struct counter_device *counter_dev;
+	void __iomem *mmio_base;
+	unsigned long clk_rate;
+	int ret;
+
+	counter_dev = devm_counter_alloc(dev, sizeof(*ecap_dev));
+	if (!counter_dev)
+		return -ENOMEM;
+
+	counter_dev->name = ECAP_DRV_NAME;
+	counter_dev->parent = dev;
+	counter_dev->ops = &ecap_cnt_ops;
+	counter_dev->signals = ecap_cnt_signals;
+	counter_dev->num_signals = ARRAY_SIZE(ecap_cnt_signals);
+	counter_dev->counts = ecap_cnt_counts;
+	counter_dev->num_counts = ARRAY_SIZE(ecap_cnt_counts);
+
+	ecap_dev = counter_priv(counter_dev);
+
+	mutex_init(&ecap_dev->lock);
+
+	ecap_dev->clk = devm_clk_get_enabled(dev, "fck");
+	if (IS_ERR(ecap_dev->clk))
+		return dev_err_probe(dev, PTR_ERR(ecap_dev->clk), "failed to get clock\n");
+
+	clk_rate = clk_get_rate(ecap_dev->clk);
+	if (!clk_rate) {
+		dev_err(dev, "failed to get clock rate\n");
+		return -EINVAL;
+	}
+
+	mmio_base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(mmio_base))
+		return PTR_ERR(mmio_base);
+
+	ecap_dev->regmap = devm_regmap_init_mmio(dev, mmio_base, &ecap_cnt_regmap_config);
+	if (IS_ERR(ecap_dev->regmap))
+		return dev_err_probe(dev, PTR_ERR(ecap_dev->regmap), "failed to init regmap\n");
+
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "failed to get irq\n");
+
+	ret = devm_request_irq(dev, ret, ecap_cnt_isr, 0, pdev->name, counter_dev);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to request irq\n");
+
+	platform_set_drvdata(pdev, counter_dev);
+
+	pm_runtime_enable(dev);
+
+	/* Register a cleanup callback to care for disabling PM */
+	ret = devm_add_action_or_reset(dev, ecap_cnt_pm_disable, dev);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to add pm disable action\n");
+
+	ret = devm_counter_add(dev, counter_dev);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to add counter\n");
+
+	return 0;
+}
+
+static int ecap_cnt_remove(struct platform_device *pdev)
+{
+	struct counter_device *counter_dev = platform_get_drvdata(pdev);
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter_dev);
+
+	if (ecap_dev->enabled)
+		ecap_cnt_capture_disable(counter_dev);
+
+	return 0;
+}
+
+static int ecap_cnt_suspend(struct device *dev)
+{
+	struct counter_device *counter_dev = dev_get_drvdata(dev);
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter_dev);
+
+	/* If eCAP is running, stop capture then save timestamp counter */
+	if (ecap_dev->enabled) {
+		/*
+		 * Disabling capture has the following effects:
+		 * - interrupts are disabled
+		 * - loading of capture registers is disabled
+		 * - timebase counter is stopped
+		 */
+		ecap_cnt_capture_disable(counter_dev);
+		ecap_dev->pm_ctx.time_cntr = ecap_cnt_count_get_val(counter_dev, ECAP_TSCNT_REG);
+	}
+
+	ecap_dev->pm_ctx.ev_mode = ecap_cnt_capture_get_evmode(counter_dev);
+
+	clk_disable(ecap_dev->clk);
+
+	return 0;
+}
+
+static int ecap_cnt_resume(struct device *dev)
+{
+	struct counter_device *counter_dev = dev_get_drvdata(dev);
+	struct ecap_cnt_dev *ecap_dev = counter_priv(counter_dev);
+
+	clk_enable(ecap_dev->clk);
+
+	ecap_cnt_capture_set_evmode(counter_dev, ecap_dev->pm_ctx.ev_mode);
+
+	/* If eCAP was running, restore timestamp counter then run capture */
+	if (ecap_dev->enabled) {
+		ecap_cnt_count_set_val(counter_dev, ECAP_TSCNT_REG, ecap_dev->pm_ctx.time_cntr);
+		ecap_cnt_capture_enable(counter_dev);
+	}
+
+	return 0;
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(ecap_cnt_pm_ops, ecap_cnt_suspend, ecap_cnt_resume);
+
+static const struct of_device_id ecap_cnt_of_match[] = {
+	{ .compatible	= "ti,am62-ecap-capture" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, ecap_cnt_of_match);
+
+static struct platform_driver ecap_cnt_driver = {
+	.probe = ecap_cnt_probe,
+	.remove = ecap_cnt_remove,
+	.driver = {
+		.name = "ecap-capture",
+		.of_match_table = ecap_cnt_of_match,
+		.pm = pm_sleep_ptr(&ecap_cnt_pm_ops),
+	},
+};
+module_platform_driver(ecap_cnt_driver);
+
+MODULE_DESCRIPTION("ECAP Capture driver");
+MODULE_AUTHOR("Julien Panis <jpanis@baylibre.com>");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(COUNTER);