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, 920 insertions, 0 deletions

diff --git a/sound/soc/atmel/mchp-spdiftx.c b/sound/soc/atmel/mchp-spdiftx.c
new file mode 100644
index 000000000..dc96a6fbf
--- /dev/null
+++ b/sound/soc/atmel/mchp-spdiftx.c
@@ -0,0 +1,920 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Driver for Microchip S/PDIF TX Controller
+//
+// Copyright (C) 2020 Microchip Technology Inc. and its subsidiaries
+//
+// Author: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/spinlock.h>
+
+#include <sound/asoundef.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+/*
+ * ---- S/PDIF Transmitter Controller Register map ----
+ */
+#define SPDIFTX_CR			0x00	/* Control Register */
+#define SPDIFTX_MR			0x04	/* Mode Register */
+#define SPDIFTX_CDR			0x0C	/* Common Data Register */
+
+#define SPDIFTX_IER			0x14	/* Interrupt Enable Register */
+#define SPDIFTX_IDR			0x18	/* Interrupt Disable Register */
+#define SPDIFTX_IMR			0x1C	/* Interrupt Mask Register */
+#define SPDIFTX_ISR			0x20	/* Interrupt Status Register */
+
+#define SPDIFTX_CH1UD(reg)	(0x50 + (reg) * 4)	/* User Data 1 Register x */
+#define SPDIFTX_CH1S(reg)	(0x80 + (reg) * 4)	/* Channel Status 1 Register x */
+
+#define SPDIFTX_VERSION			0xF0
+
+/*
+ * ---- Control Register (Write-only) ----
+ */
+#define SPDIFTX_CR_SWRST		BIT(0)	/* Software Reset */
+#define SPDIFTX_CR_FCLR			BIT(1)	/* FIFO clear */
+
+/*
+ * ---- Mode Register (Read/Write) ----
+ */
+/* Transmit Enable */
+#define SPDIFTX_MR_TXEN_MASK		GENMASK(0, 0)
+#define SPDIFTX_MR_TXEN_DISABLE		(0 << 0)
+#define SPDIFTX_MR_TXEN_ENABLE		(1 << 0)
+
+/* Multichannel Transfer */
+#define SPDIFTX_MR_MULTICH_MASK		GENAMSK(1, 1)
+#define SPDIFTX_MR_MULTICH_MONO		(0 << 1)
+#define SPDIFTX_MR_MULTICH_DUAL		(1 << 1)
+
+/* Data Word Endian Mode */
+#define SPDIFTX_MR_ENDIAN_MASK		GENMASK(2, 2)
+#define SPDIFTX_MR_ENDIAN_LITTLE	(0 << 2)
+#define SPDIFTX_MR_ENDIAN_BIG		(1 << 2)
+
+/* Data Justification */
+#define SPDIFTX_MR_JUSTIFY_MASK		GENMASK(3, 3)
+#define SPDIFTX_MR_JUSTIFY_LSB		(0 << 3)
+#define SPDIFTX_MR_JUSTIFY_MSB		(1 << 3)
+
+/* Common Audio Register Transfer Mode */
+#define SPDIFTX_MR_CMODE_MASK			GENMASK(5, 4)
+#define SPDIFTX_MR_CMODE_INDEX_ACCESS		(0 << 4)
+#define SPDIFTX_MR_CMODE_TOGGLE_ACCESS		(1 << 4)
+#define SPDIFTX_MR_CMODE_INTERLVD_ACCESS	(2 << 4)
+
+/* Valid Bits per Sample */
+#define SPDIFTX_MR_VBPS_MASK		GENMASK(13, 8)
+#define SPDIFTX_MR_VBPS(bps)		(((bps) << 8) & SPDIFTX_MR_VBPS_MASK)
+
+/* Chunk Size */
+#define SPDIFTX_MR_CHUNK_MASK		GENMASK(19, 16)
+#define SPDIFTX_MR_CHUNK(size)		(((size) << 16) & SPDIFTX_MR_CHUNK_MASK)
+
+/* Validity Bits for Channels 1 and 2 */
+#define SPDIFTX_MR_VALID1			BIT(24)
+#define SPDIFTX_MR_VALID2			BIT(25)
+
+/* Disable Null Frame on underrun */
+#define SPDIFTX_MR_DNFR_MASK		GENMASK(27, 27)
+#define SPDIFTX_MR_DNFR_INVALID		(0 << 27)
+#define SPDIFTX_MR_DNFR_VALID		(1 << 27)
+
+/* Bytes per Sample */
+#define SPDIFTX_MR_BPS_MASK		GENMASK(29, 28)
+#define SPDIFTX_MR_BPS(bytes) \
+	((((bytes) - 1) << 28) & SPDIFTX_MR_BPS_MASK)
+
+/*
+ * ---- Interrupt Enable/Disable/Mask/Status Register (Write/Read-only) ----
+ */
+#define SPDIFTX_IR_TXRDY		BIT(0)
+#define SPDIFTX_IR_TXEMPTY		BIT(1)
+#define SPDIFTX_IR_TXFULL		BIT(2)
+#define SPDIFTX_IR_TXCHUNK		BIT(3)
+#define SPDIFTX_IR_TXUDR		BIT(4)
+#define SPDIFTX_IR_TXOVR		BIT(5)
+#define SPDIFTX_IR_CSRDY		BIT(6)
+#define SPDIFTX_IR_UDRDY		BIT(7)
+#define SPDIFTX_IR_TXRDYCH(ch)		BIT((ch) + 8)
+#define SPDIFTX_IR_SECE			BIT(10)
+#define SPDIFTX_IR_TXUDRCH(ch)		BIT((ch) + 11)
+#define SPDIFTX_IR_BEND			BIT(13)
+
+static bool mchp_spdiftx_readable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case SPDIFTX_MR:
+	case SPDIFTX_IMR:
+	case SPDIFTX_ISR:
+	case SPDIFTX_CH1UD(0):
+	case SPDIFTX_CH1UD(1):
+	case SPDIFTX_CH1UD(2):
+	case SPDIFTX_CH1UD(3):
+	case SPDIFTX_CH1UD(4):
+	case SPDIFTX_CH1UD(5):
+	case SPDIFTX_CH1S(0):
+	case SPDIFTX_CH1S(1):
+	case SPDIFTX_CH1S(2):
+	case SPDIFTX_CH1S(3):
+	case SPDIFTX_CH1S(4):
+	case SPDIFTX_CH1S(5):
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool mchp_spdiftx_writeable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case SPDIFTX_CR:
+	case SPDIFTX_MR:
+	case SPDIFTX_CDR:
+	case SPDIFTX_IER:
+	case SPDIFTX_IDR:
+	case SPDIFTX_CH1UD(0):
+	case SPDIFTX_CH1UD(1):
+	case SPDIFTX_CH1UD(2):
+	case SPDIFTX_CH1UD(3):
+	case SPDIFTX_CH1UD(4):
+	case SPDIFTX_CH1UD(5):
+	case SPDIFTX_CH1S(0):
+	case SPDIFTX_CH1S(1):
+	case SPDIFTX_CH1S(2):
+	case SPDIFTX_CH1S(3):
+	case SPDIFTX_CH1S(4):
+	case SPDIFTX_CH1S(5):
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool mchp_spdiftx_precious_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case SPDIFTX_CDR:
+	case SPDIFTX_ISR:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct regmap_config mchp_spdiftx_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.max_register = SPDIFTX_VERSION,
+	.readable_reg = mchp_spdiftx_readable_reg,
+	.writeable_reg = mchp_spdiftx_writeable_reg,
+	.precious_reg = mchp_spdiftx_precious_reg,
+	.cache_type = REGCACHE_FLAT,
+};
+
+#define SPDIFTX_GCLK_RATIO	128
+
+#define SPDIFTX_CS_BITS		192
+#define SPDIFTX_UD_BITS		192
+
+struct mchp_spdiftx_mixer_control {
+	unsigned char				ch_stat[SPDIFTX_CS_BITS / 8];
+	unsigned char				user_data[SPDIFTX_UD_BITS / 8];
+	spinlock_t				lock; /* exclusive access to control data */
+};
+
+struct mchp_spdiftx_dev {
+	struct mchp_spdiftx_mixer_control	control;
+	struct snd_dmaengine_dai_dma_data	playback;
+	struct device				*dev;
+	struct regmap				*regmap;
+	struct clk				*pclk;
+	struct clk				*gclk;
+	unsigned int				fmt;
+	unsigned int				suspend_irq;
+};
+
+static inline int mchp_spdiftx_is_running(struct mchp_spdiftx_dev *dev)
+{
+	u32 mr;
+
+	regmap_read(dev->regmap, SPDIFTX_MR, &mr);
+	return !!(mr & SPDIFTX_MR_TXEN_ENABLE);
+}
+
+static void mchp_spdiftx_channel_status_write(struct mchp_spdiftx_dev *dev)
+{
+	struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+	u32 val;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ctrl->ch_stat) / 4; i++) {
+		val = (ctrl->ch_stat[(i * 4) + 0] << 0) |
+		      (ctrl->ch_stat[(i * 4) + 1] << 8) |
+		      (ctrl->ch_stat[(i * 4) + 2] << 16) |
+		      (ctrl->ch_stat[(i * 4) + 3] << 24);
+
+		regmap_write(dev->regmap, SPDIFTX_CH1S(i), val);
+	}
+}
+
+static void mchp_spdiftx_user_data_write(struct mchp_spdiftx_dev *dev)
+{
+	struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+	u32 val;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ctrl->user_data) / 4; i++) {
+		val = (ctrl->user_data[(i * 4) + 0] << 0) |
+		      (ctrl->user_data[(i * 4) + 1] << 8) |
+		      (ctrl->user_data[(i * 4) + 2] << 16) |
+		      (ctrl->user_data[(i * 4) + 3] << 24);
+
+		regmap_write(dev->regmap, SPDIFTX_CH1UD(i), val);
+	}
+}
+
+static irqreturn_t mchp_spdiftx_interrupt(int irq, void *dev_id)
+{
+	struct mchp_spdiftx_dev *dev = dev_id;
+	struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+	u32 sr, imr, pending, idr = 0;
+
+	regmap_read(dev->regmap, SPDIFTX_ISR, &sr);
+	regmap_read(dev->regmap, SPDIFTX_IMR, &imr);
+	pending = sr & imr;
+
+	if (!pending)
+		return IRQ_NONE;
+
+	if (pending & SPDIFTX_IR_TXUDR) {
+		dev_warn(dev->dev, "underflow detected\n");
+		idr |= SPDIFTX_IR_TXUDR;
+	}
+
+	if (pending & SPDIFTX_IR_TXOVR) {
+		dev_warn(dev->dev, "overflow detected\n");
+		idr |= SPDIFTX_IR_TXOVR;
+	}
+
+	if (pending & SPDIFTX_IR_UDRDY) {
+		spin_lock(&ctrl->lock);
+		mchp_spdiftx_user_data_write(dev);
+		spin_unlock(&ctrl->lock);
+		idr |= SPDIFTX_IR_UDRDY;
+	}
+
+	if (pending & SPDIFTX_IR_CSRDY) {
+		spin_lock(&ctrl->lock);
+		mchp_spdiftx_channel_status_write(dev);
+		spin_unlock(&ctrl->lock);
+		idr |= SPDIFTX_IR_CSRDY;
+	}
+
+	regmap_write(dev->regmap, SPDIFTX_IDR, idr);
+
+	return IRQ_HANDLED;
+}
+
+static int mchp_spdiftx_dai_startup(struct snd_pcm_substream *substream,
+				    struct snd_soc_dai *dai)
+{
+	struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+	/* Software reset the IP */
+	regmap_write(dev->regmap, SPDIFTX_CR,
+		     SPDIFTX_CR_SWRST | SPDIFTX_CR_FCLR);
+
+	return 0;
+}
+
+static void mchp_spdiftx_dai_shutdown(struct snd_pcm_substream *substream,
+				      struct snd_soc_dai *dai)
+{
+	struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+	/* Disable interrupts */
+	regmap_write(dev->regmap, SPDIFTX_IDR, 0xffffffff);
+}
+
+static int mchp_spdiftx_trigger(struct snd_pcm_substream *substream, int cmd,
+				struct snd_soc_dai *dai)
+{
+	struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+	struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+	u32 mr;
+	int running;
+	int ret;
+
+	/* do not start/stop while channel status or user data is updated */
+	spin_lock(&ctrl->lock);
+	regmap_read(dev->regmap, SPDIFTX_MR, &mr);
+	running = !!(mr & SPDIFTX_MR_TXEN_ENABLE);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_START:
+		regmap_write(dev->regmap, SPDIFTX_IER, dev->suspend_irq |
+			     SPDIFTX_IR_TXUDR | SPDIFTX_IR_TXOVR);
+		dev->suspend_irq = 0;
+		fallthrough;
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		if (!running) {
+			mr &= ~SPDIFTX_MR_TXEN_MASK;
+			mr |= SPDIFTX_MR_TXEN_ENABLE;
+		}
+		break;
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		regmap_read(dev->regmap, SPDIFTX_IMR, &dev->suspend_irq);
+		fallthrough;
+	case SNDRV_PCM_TRIGGER_STOP:
+		regmap_write(dev->regmap, SPDIFTX_IDR, dev->suspend_irq |
+			     SPDIFTX_IR_TXUDR | SPDIFTX_IR_TXOVR);
+		fallthrough;
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		if (running) {
+			mr &= ~SPDIFTX_MR_TXEN_MASK;
+			mr |= SPDIFTX_MR_TXEN_DISABLE;
+		}
+		break;
+	default:
+		spin_unlock(&ctrl->lock);
+		return -EINVAL;
+	}
+
+	ret = regmap_write(dev->regmap, SPDIFTX_MR, mr);
+	spin_unlock(&ctrl->lock);
+	if (ret)
+		dev_err(dev->dev, "unable to disable TX: %d\n", ret);
+
+	return ret;
+}
+
+static int mchp_spdiftx_hw_params(struct snd_pcm_substream *substream,
+				  struct snd_pcm_hw_params *params,
+				  struct snd_soc_dai *dai)
+{
+	unsigned long flags;
+	struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+	struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+	u32 mr;
+	unsigned int bps = params_physical_width(params) / 8;
+	unsigned char aes3;
+	int ret;
+
+	dev_dbg(dev->dev, "%s() rate=%u format=%#x width=%u channels=%u\n",
+		__func__, params_rate(params), params_format(params),
+		params_width(params), params_channels(params));
+
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+		dev_err(dev->dev, "Capture is not supported\n");
+		return -EINVAL;
+	}
+
+	regmap_read(dev->regmap, SPDIFTX_MR, &mr);
+
+	if (mr & SPDIFTX_MR_TXEN_ENABLE) {
+		dev_err(dev->dev, "PCM already running\n");
+		return -EBUSY;
+	}
+
+	/* Defaults: Toggle mode, justify to LSB, chunksize 1 */
+	mr = SPDIFTX_MR_CMODE_TOGGLE_ACCESS | SPDIFTX_MR_JUSTIFY_LSB;
+	dev->playback.maxburst = 1;
+	switch (params_channels(params)) {
+	case 1:
+		mr |= SPDIFTX_MR_MULTICH_MONO;
+		break;
+	case 2:
+		mr |= SPDIFTX_MR_MULTICH_DUAL;
+		if (bps > 2)
+			dev->playback.maxburst = 2;
+		break;
+	default:
+		dev_err(dev->dev, "unsupported number of channels: %d\n",
+			params_channels(params));
+		return -EINVAL;
+	}
+	mr |= SPDIFTX_MR_CHUNK(dev->playback.maxburst);
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S8:
+		mr |= SPDIFTX_MR_VBPS(8);
+		break;
+	case SNDRV_PCM_FORMAT_S16_BE:
+		mr |= SPDIFTX_MR_ENDIAN_BIG;
+		fallthrough;
+	case SNDRV_PCM_FORMAT_S16_LE:
+		mr |= SPDIFTX_MR_VBPS(16);
+		break;
+	case SNDRV_PCM_FORMAT_S18_3BE:
+		mr |= SPDIFTX_MR_ENDIAN_BIG;
+		fallthrough;
+	case SNDRV_PCM_FORMAT_S18_3LE:
+		mr |= SPDIFTX_MR_VBPS(18);
+		break;
+	case SNDRV_PCM_FORMAT_S20_3BE:
+		mr |= SPDIFTX_MR_ENDIAN_BIG;
+		fallthrough;
+	case SNDRV_PCM_FORMAT_S20_3LE:
+		mr |= SPDIFTX_MR_VBPS(20);
+		break;
+	case SNDRV_PCM_FORMAT_S24_3BE:
+		mr |= SPDIFTX_MR_ENDIAN_BIG;
+		fallthrough;
+	case SNDRV_PCM_FORMAT_S24_3LE:
+		mr |= SPDIFTX_MR_VBPS(24);
+		break;
+	case SNDRV_PCM_FORMAT_S24_BE:
+		mr |= SPDIFTX_MR_ENDIAN_BIG;
+		fallthrough;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		mr |= SPDIFTX_MR_VBPS(24);
+		break;
+	case SNDRV_PCM_FORMAT_S32_BE:
+		mr |= SPDIFTX_MR_ENDIAN_BIG;
+		fallthrough;
+	case SNDRV_PCM_FORMAT_S32_LE:
+		mr |= SPDIFTX_MR_VBPS(32);
+		break;
+	default:
+		dev_err(dev->dev, "unsupported PCM format: %d\n",
+			params_format(params));
+		return -EINVAL;
+	}
+
+	mr |= SPDIFTX_MR_BPS(bps);
+
+	switch (params_rate(params)) {
+	case 22050:
+		aes3 = IEC958_AES3_CON_FS_22050;
+		break;
+	case 24000:
+		aes3 = IEC958_AES3_CON_FS_24000;
+		break;
+	case 32000:
+		aes3 = IEC958_AES3_CON_FS_32000;
+		break;
+	case 44100:
+		aes3 = IEC958_AES3_CON_FS_44100;
+		break;
+	case 48000:
+		aes3 = IEC958_AES3_CON_FS_48000;
+		break;
+	case 88200:
+		aes3 = IEC958_AES3_CON_FS_88200;
+		break;
+	case 96000:
+		aes3 = IEC958_AES3_CON_FS_96000;
+		break;
+	case 176400:
+		aes3 = IEC958_AES3_CON_FS_176400;
+		break;
+	case 192000:
+		aes3 = IEC958_AES3_CON_FS_192000;
+		break;
+	case 8000:
+	case 11025:
+	case 16000:
+	case 64000:
+		aes3 = IEC958_AES3_CON_FS_NOTID;
+		break;
+	default:
+		dev_err(dev->dev, "unsupported sample frequency: %u\n",
+			params_rate(params));
+		return -EINVAL;
+	}
+	spin_lock_irqsave(&ctrl->lock, flags);
+	ctrl->ch_stat[3] &= ~IEC958_AES3_CON_FS;
+	ctrl->ch_stat[3] |= aes3;
+	mchp_spdiftx_channel_status_write(dev);
+	spin_unlock_irqrestore(&ctrl->lock, flags);
+
+	/* GCLK is enabled by runtime PM. */
+	clk_disable_unprepare(dev->gclk);
+
+	ret = clk_set_rate(dev->gclk, params_rate(params) *
+				      SPDIFTX_GCLK_RATIO);
+	if (ret) {
+		dev_err(dev->dev,
+			"unable to change gclk rate to: rate %u * ratio %u\n",
+			params_rate(params), SPDIFTX_GCLK_RATIO);
+		return ret;
+	}
+	ret = clk_prepare_enable(dev->gclk);
+	if (ret) {
+		dev_err(dev->dev, "unable to enable gclk: %d\n", ret);
+		return ret;
+	}
+
+	dev_dbg(dev->dev, "%s(): GCLK set to %d\n", __func__,
+		params_rate(params) * SPDIFTX_GCLK_RATIO);
+
+	regmap_write(dev->regmap, SPDIFTX_MR, mr);
+
+	return 0;
+}
+
+static int mchp_spdiftx_hw_free(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+	return regmap_write(dev->regmap, SPDIFTX_CR,
+			    SPDIFTX_CR_SWRST | SPDIFTX_CR_FCLR);
+}
+
+static const struct snd_soc_dai_ops mchp_spdiftx_dai_ops = {
+	.startup	= mchp_spdiftx_dai_startup,
+	.shutdown	= mchp_spdiftx_dai_shutdown,
+	.trigger	= mchp_spdiftx_trigger,
+	.hw_params	= mchp_spdiftx_hw_params,
+	.hw_free	= mchp_spdiftx_hw_free,
+};
+
+#define MCHP_SPDIFTX_RATES	SNDRV_PCM_RATE_8000_192000
+
+#define MCHP_SPDIFTX_FORMATS	(SNDRV_PCM_FMTBIT_S8 |		\
+				 SNDRV_PCM_FMTBIT_S16_LE |	\
+				 SNDRV_PCM_FMTBIT_U16_BE |	\
+				 SNDRV_PCM_FMTBIT_S18_3LE |	\
+				 SNDRV_PCM_FMTBIT_S18_3BE |	\
+				 SNDRV_PCM_FMTBIT_S20_3LE |	\
+				 SNDRV_PCM_FMTBIT_S20_3BE |	\
+				 SNDRV_PCM_FMTBIT_S24_3LE |	\
+				 SNDRV_PCM_FMTBIT_S24_3BE |	\
+				 SNDRV_PCM_FMTBIT_S24_LE |	\
+				 SNDRV_PCM_FMTBIT_S24_BE |	\
+				 SNDRV_PCM_FMTBIT_S32_LE |	\
+				 SNDRV_PCM_FMTBIT_S32_BE	\
+				 )
+
+static int mchp_spdiftx_info(struct snd_kcontrol *kcontrol,
+			     struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
+	uinfo->count = 1;
+
+	return 0;
+}
+
+static int mchp_spdiftx_cs_get(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *uvalue)
+{
+	unsigned long flags;
+	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+	struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+	struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+
+	spin_lock_irqsave(&ctrl->lock, flags);
+	memcpy(uvalue->value.iec958.status, ctrl->ch_stat,
+	       sizeof(ctrl->ch_stat));
+	spin_unlock_irqrestore(&ctrl->lock, flags);
+
+	return 0;
+}
+
+static int mchp_spdiftx_cs_put(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *uvalue)
+{
+	unsigned long flags;
+	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+	struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+	struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+	int changed = 0;
+	int i;
+
+	spin_lock_irqsave(&ctrl->lock, flags);
+	for (i = 0; i < ARRAY_SIZE(ctrl->ch_stat); i++) {
+		if (ctrl->ch_stat[i] != uvalue->value.iec958.status[i])
+			changed = 1;
+		ctrl->ch_stat[i] = uvalue->value.iec958.status[i];
+	}
+
+	if (changed) {
+		/* don't enable IP while we copy the channel status */
+		if (mchp_spdiftx_is_running(dev)) {
+			/*
+			 * if SPDIF is running, wait for interrupt to write
+			 * channel status
+			 */
+			regmap_write(dev->regmap, SPDIFTX_IER,
+				     SPDIFTX_IR_CSRDY);
+		} else {
+			mchp_spdiftx_channel_status_write(dev);
+		}
+	}
+	spin_unlock_irqrestore(&ctrl->lock, flags);
+
+	return changed;
+}
+
+static int mchp_spdiftx_cs_mask(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *uvalue)
+{
+	memset(uvalue->value.iec958.status, 0xff,
+	       sizeof(uvalue->value.iec958.status));
+
+	return 0;
+}
+
+static int mchp_spdiftx_subcode_get(struct snd_kcontrol *kcontrol,
+				    struct snd_ctl_elem_value *uvalue)
+{
+	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+	struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+	struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+	unsigned long flags;
+
+	spin_lock_irqsave(&ctrl->lock, flags);
+	memcpy(uvalue->value.iec958.subcode, ctrl->user_data,
+	       sizeof(ctrl->user_data));
+	spin_unlock_irqrestore(&ctrl->lock, flags);
+
+	return 0;
+}
+
+static int mchp_spdiftx_subcode_put(struct snd_kcontrol *kcontrol,
+				    struct snd_ctl_elem_value *uvalue)
+{
+	unsigned long flags;
+	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+	struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+	struct mchp_spdiftx_mixer_control *ctrl = &dev->control;
+	int changed = 0;
+	int i;
+
+	spin_lock_irqsave(&ctrl->lock, flags);
+	for (i = 0; i < ARRAY_SIZE(ctrl->user_data); i++) {
+		if (ctrl->user_data[i] != uvalue->value.iec958.subcode[i])
+			changed = 1;
+
+		ctrl->user_data[i] = uvalue->value.iec958.subcode[i];
+	}
+	if (changed) {
+		if (mchp_spdiftx_is_running(dev)) {
+			/*
+			 * if SPDIF is running, wait for interrupt to write
+			 * user data
+			 */
+			regmap_write(dev->regmap, SPDIFTX_IER,
+				     SPDIFTX_IR_UDRDY);
+		} else {
+			mchp_spdiftx_user_data_write(dev);
+		}
+	}
+	spin_unlock_irqrestore(&ctrl->lock, flags);
+
+	return changed;
+}
+
+static struct snd_kcontrol_new mchp_spdiftx_ctrls[] = {
+	/* Channel status controller */
+	{
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
+		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
+			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+		.info = mchp_spdiftx_info,
+		.get = mchp_spdiftx_cs_get,
+		.put = mchp_spdiftx_cs_put,
+	},
+	{
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
+		.access = SNDRV_CTL_ELEM_ACCESS_READ,
+			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+		.info = mchp_spdiftx_info,
+		.get = mchp_spdiftx_cs_mask,
+	},
+	/* User bits controller */
+	{
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = "IEC958 Subcode Playback Default",
+		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+		.info = mchp_spdiftx_info,
+		.get = mchp_spdiftx_subcode_get,
+		.put = mchp_spdiftx_subcode_put,
+	},
+};
+
+static int mchp_spdiftx_dai_probe(struct snd_soc_dai *dai)
+{
+	struct mchp_spdiftx_dev *dev = snd_soc_dai_get_drvdata(dai);
+
+	snd_soc_dai_init_dma_data(dai, &dev->playback, NULL);
+
+	/* Add controls */
+	snd_soc_add_dai_controls(dai, mchp_spdiftx_ctrls,
+				 ARRAY_SIZE(mchp_spdiftx_ctrls));
+
+	return 0;
+}
+
+static struct snd_soc_dai_driver mchp_spdiftx_dai = {
+	.name = "mchp-spdiftx",
+	.probe	= mchp_spdiftx_dai_probe,
+	.playback = {
+		.stream_name = "S/PDIF Playback",
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = MCHP_SPDIFTX_RATES,
+		.formats = MCHP_SPDIFTX_FORMATS,
+	},
+	.ops = &mchp_spdiftx_dai_ops,
+};
+
+static const struct snd_soc_component_driver mchp_spdiftx_component = {
+	.name			= "mchp-spdiftx",
+	.legacy_dai_naming	= 1,
+};
+
+static const struct of_device_id mchp_spdiftx_dt_ids[] = {
+	{
+		.compatible = "microchip,sama7g5-spdiftx",
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mchp_spdiftx_dt_ids);
+
+static int mchp_spdiftx_runtime_suspend(struct device *dev)
+{
+	struct mchp_spdiftx_dev *spdiftx = dev_get_drvdata(dev);
+
+	regcache_cache_only(spdiftx->regmap, true);
+
+	clk_disable_unprepare(spdiftx->gclk);
+	clk_disable_unprepare(spdiftx->pclk);
+
+	return 0;
+}
+
+static int mchp_spdiftx_runtime_resume(struct device *dev)
+{
+	struct mchp_spdiftx_dev *spdiftx = dev_get_drvdata(dev);
+	int ret;
+
+	ret = clk_prepare_enable(spdiftx->pclk);
+	if (ret) {
+		dev_err(spdiftx->dev,
+			"failed to enable the peripheral clock: %d\n", ret);
+		return ret;
+	}
+	ret = clk_prepare_enable(spdiftx->gclk);
+	if (ret) {
+		dev_err(spdiftx->dev,
+			"failed to enable generic clock: %d\n", ret);
+		goto disable_pclk;
+	}
+
+	regcache_cache_only(spdiftx->regmap, false);
+	regcache_mark_dirty(spdiftx->regmap);
+	ret = regcache_sync(spdiftx->regmap);
+	if (ret) {
+		regcache_cache_only(spdiftx->regmap, true);
+		clk_disable_unprepare(spdiftx->gclk);
+disable_pclk:
+		clk_disable_unprepare(spdiftx->pclk);
+	}
+
+	return ret;
+}
+
+static const struct dev_pm_ops mchp_spdiftx_pm_ops = {
+	SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
+	RUNTIME_PM_OPS(mchp_spdiftx_runtime_suspend, mchp_spdiftx_runtime_resume,
+		       NULL)
+};
+
+static int mchp_spdiftx_probe(struct platform_device *pdev)
+{
+	struct mchp_spdiftx_dev *dev;
+	struct resource *mem;
+	struct regmap *regmap;
+	void __iomem *base;
+	struct mchp_spdiftx_mixer_control *ctrl;
+	int irq;
+	int err;
+
+	/* Get memory for driver data. */
+	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
+	if (!dev)
+		return -ENOMEM;
+
+	/* Map I/O registers. */
+	base = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	regmap = devm_regmap_init_mmio(&pdev->dev, base,
+				       &mchp_spdiftx_regmap_config);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	/* Request IRQ */
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	err = devm_request_irq(&pdev->dev, irq, mchp_spdiftx_interrupt, 0,
+			       dev_name(&pdev->dev), dev);
+	if (err)
+		return err;
+
+	/* Get the peripheral clock */
+	dev->pclk = devm_clk_get(&pdev->dev, "pclk");
+	if (IS_ERR(dev->pclk)) {
+		err = PTR_ERR(dev->pclk);
+		dev_err(&pdev->dev,
+			"failed to get the peripheral clock: %d\n", err);
+		return err;
+	}
+
+	/* Get the generic clock */
+	dev->gclk = devm_clk_get(&pdev->dev, "gclk");
+	if (IS_ERR(dev->gclk)) {
+		err = PTR_ERR(dev->gclk);
+		dev_err(&pdev->dev,
+			"failed to get the PMC generic clock: %d\n", err);
+		return err;
+	}
+
+	ctrl = &dev->control;
+	spin_lock_init(&ctrl->lock);
+
+	/* Init channel status */
+	ctrl->ch_stat[0] = IEC958_AES0_CON_NOT_COPYRIGHT |
+			   IEC958_AES0_CON_EMPHASIS_NONE;
+
+	dev->dev = &pdev->dev;
+	dev->regmap = regmap;
+	platform_set_drvdata(pdev, dev);
+
+	pm_runtime_enable(dev->dev);
+	if (!pm_runtime_enabled(dev->dev)) {
+		err = mchp_spdiftx_runtime_resume(dev->dev);
+		if (err)
+			return err;
+	}
+
+	dev->playback.addr = (dma_addr_t)mem->start + SPDIFTX_CDR;
+	dev->playback.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+
+	err = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
+	if (err) {
+		dev_err(&pdev->dev, "failed to register PMC: %d\n", err);
+		goto pm_runtime_suspend;
+	}
+
+	err = devm_snd_soc_register_component(&pdev->dev,
+					      &mchp_spdiftx_component,
+					      &mchp_spdiftx_dai, 1);
+	if (err) {
+		dev_err(&pdev->dev, "failed to register component: %d\n", err);
+		goto pm_runtime_suspend;
+	}
+
+	return 0;
+
+pm_runtime_suspend:
+	if (!pm_runtime_status_suspended(dev->dev))
+		mchp_spdiftx_runtime_suspend(dev->dev);
+	pm_runtime_disable(dev->dev);
+
+	return err;
+}
+
+static int mchp_spdiftx_remove(struct platform_device *pdev)
+{
+	struct mchp_spdiftx_dev *dev = platform_get_drvdata(pdev);
+
+	if (!pm_runtime_status_suspended(dev->dev))
+		mchp_spdiftx_runtime_suspend(dev->dev);
+
+	pm_runtime_disable(dev->dev);
+
+	return 0;
+}
+
+static struct platform_driver mchp_spdiftx_driver = {
+	.probe	= mchp_spdiftx_probe,
+	.remove = mchp_spdiftx_remove,
+	.driver	= {
+		.name	= "mchp_spdiftx",
+		.of_match_table = of_match_ptr(mchp_spdiftx_dt_ids),
+		.pm = pm_ptr(&mchp_spdiftx_pm_ops)
+	},
+};
+
+module_platform_driver(mchp_spdiftx_driver);
+
+MODULE_AUTHOR("Codrin Ciubotariu <codrin.ciubotariu@microchip.com>");
+MODULE_DESCRIPTION("Microchip S/PDIF TX Controller Driver");
+MODULE_LICENSE("GPL v2");