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, 1216 insertions, 0 deletions

diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c
new file mode 100644
index 000000000..17fefd27e
--- /dev/null
+++ b/sound/soc/fsl/fsl_esai.c
@@ -0,0 +1,1216 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Freescale ESAI ALSA SoC Digital Audio Interface (DAI) driver
+//
+// Copyright (C) 2014 Freescale Semiconductor, Inc.
+
+#include <linux/clk.h>
+#include <linux/dmaengine.h>
+#include <linux/module.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/pm_runtime.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_params.h>
+
+#include "fsl_esai.h"
+#include "imx-pcm.h"
+
+#define FSL_ESAI_FORMATS	(SNDRV_PCM_FMTBIT_S8 | \
+				SNDRV_PCM_FMTBIT_S16_LE | \
+				SNDRV_PCM_FMTBIT_S20_3LE | \
+				SNDRV_PCM_FMTBIT_S24_LE)
+
+/**
+ * struct fsl_esai_soc_data - soc specific data
+ * @reset_at_xrun: flags for enable reset operaton
+ */
+struct fsl_esai_soc_data {
+	bool reset_at_xrun;
+};
+
+/**
+ * struct fsl_esai - ESAI private data
+ * @dma_params_rx: DMA parameters for receive channel
+ * @dma_params_tx: DMA parameters for transmit channel
+ * @pdev: platform device pointer
+ * @regmap: regmap handler
+ * @coreclk: clock source to access register
+ * @extalclk: esai clock source to derive HCK, SCK and FS
+ * @fsysclk: system clock source to derive HCK, SCK and FS
+ * @spbaclk: SPBA clock (optional, depending on SoC design)
+ * @work: work to handle the reset operation
+ * @soc: soc specific data
+ * @lock: spin lock between hw_reset() and trigger()
+ * @fifo_depth: depth of tx/rx FIFO
+ * @slot_width: width of each DAI slot
+ * @slots: number of slots
+ * @tx_mask: slot mask for TX
+ * @rx_mask: slot mask for RX
+ * @channels: channel num for tx or rx
+ * @hck_rate: clock rate of desired HCKx clock
+ * @sck_rate: clock rate of desired SCKx clock
+ * @hck_dir: the direction of HCKx pads
+ * @sck_div: if using PSR/PM dividers for SCKx clock
+ * @consumer_mode: if fully using DAI clock consumer mode
+ * @synchronous: if using tx/rx synchronous mode
+ * @name: driver name
+ */
+struct fsl_esai {
+	struct snd_dmaengine_dai_dma_data dma_params_rx;
+	struct snd_dmaengine_dai_dma_data dma_params_tx;
+	struct platform_device *pdev;
+	struct regmap *regmap;
+	struct clk *coreclk;
+	struct clk *extalclk;
+	struct clk *fsysclk;
+	struct clk *spbaclk;
+	struct work_struct work;
+	const struct fsl_esai_soc_data *soc;
+	spinlock_t lock; /* Protect hw_reset and trigger */
+	u32 fifo_depth;
+	u32 slot_width;
+	u32 slots;
+	u32 tx_mask;
+	u32 rx_mask;
+	u32 channels[2];
+	u32 hck_rate[2];
+	u32 sck_rate[2];
+	bool hck_dir[2];
+	bool sck_div[2];
+	bool consumer_mode;
+	bool synchronous;
+	char name[32];
+};
+
+static struct fsl_esai_soc_data fsl_esai_vf610 = {
+	.reset_at_xrun = true,
+};
+
+static struct fsl_esai_soc_data fsl_esai_imx35 = {
+	.reset_at_xrun = true,
+};
+
+static struct fsl_esai_soc_data fsl_esai_imx6ull = {
+	.reset_at_xrun = false,
+};
+
+static irqreturn_t esai_isr(int irq, void *devid)
+{
+	struct fsl_esai *esai_priv = (struct fsl_esai *)devid;
+	struct platform_device *pdev = esai_priv->pdev;
+	u32 esr;
+	u32 saisr;
+
+	regmap_read(esai_priv->regmap, REG_ESAI_ESR, &esr);
+	regmap_read(esai_priv->regmap, REG_ESAI_SAISR, &saisr);
+
+	if ((saisr & (ESAI_SAISR_TUE | ESAI_SAISR_ROE)) &&
+	    esai_priv->soc->reset_at_xrun) {
+		dev_dbg(&pdev->dev, "reset module for xrun\n");
+		regmap_update_bits(esai_priv->regmap, REG_ESAI_TCR,
+				   ESAI_xCR_xEIE_MASK, 0);
+		regmap_update_bits(esai_priv->regmap, REG_ESAI_RCR,
+				   ESAI_xCR_xEIE_MASK, 0);
+		schedule_work(&esai_priv->work);
+	}
+
+	if (esr & ESAI_ESR_TINIT_MASK)
+		dev_dbg(&pdev->dev, "isr: Transmission Initialized\n");
+
+	if (esr & ESAI_ESR_RFF_MASK)
+		dev_warn(&pdev->dev, "isr: Receiving overrun\n");
+
+	if (esr & ESAI_ESR_TFE_MASK)
+		dev_warn(&pdev->dev, "isr: Transmission underrun\n");
+
+	if (esr & ESAI_ESR_TLS_MASK)
+		dev_dbg(&pdev->dev, "isr: Just transmitted the last slot\n");
+
+	if (esr & ESAI_ESR_TDE_MASK)
+		dev_dbg(&pdev->dev, "isr: Transmission data exception\n");
+
+	if (esr & ESAI_ESR_TED_MASK)
+		dev_dbg(&pdev->dev, "isr: Transmitting even slots\n");
+
+	if (esr & ESAI_ESR_TD_MASK)
+		dev_dbg(&pdev->dev, "isr: Transmitting data\n");
+
+	if (esr & ESAI_ESR_RLS_MASK)
+		dev_dbg(&pdev->dev, "isr: Just received the last slot\n");
+
+	if (esr & ESAI_ESR_RDE_MASK)
+		dev_dbg(&pdev->dev, "isr: Receiving data exception\n");
+
+	if (esr & ESAI_ESR_RED_MASK)
+		dev_dbg(&pdev->dev, "isr: Receiving even slots\n");
+
+	if (esr & ESAI_ESR_RD_MASK)
+		dev_dbg(&pdev->dev, "isr: Receiving data\n");
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * fsl_esai_divisor_cal - This function is used to calculate the
+ * divisors of psr, pm, fp and it is supposed to be called in
+ * set_dai_sysclk() and set_bclk().
+ *
+ * @dai: pointer to DAI
+ * @tx: current setting is for playback or capture
+ * @ratio: desired overall ratio for the paticipating dividers
+ * @usefp: for HCK setting, there is no need to set fp divider
+ * @fp: bypass other dividers by setting fp directly if fp != 0
+ */
+static int fsl_esai_divisor_cal(struct snd_soc_dai *dai, bool tx, u32 ratio,
+				bool usefp, u32 fp)
+{
+	struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
+	u32 psr, pm = 999, maxfp, prod, sub, savesub, i, j;
+
+	maxfp = usefp ? 16 : 1;
+
+	if (usefp && fp)
+		goto out_fp;
+
+	if (ratio > 2 * 8 * 256 * maxfp || ratio < 2) {
+		dev_err(dai->dev, "the ratio is out of range (2 ~ %d)\n",
+				2 * 8 * 256 * maxfp);
+		return -EINVAL;
+	} else if (ratio % 2) {
+		dev_err(dai->dev, "the raio must be even if using upper divider\n");
+		return -EINVAL;
+	}
+
+	ratio /= 2;
+
+	psr = ratio <= 256 * maxfp ? ESAI_xCCR_xPSR_BYPASS : ESAI_xCCR_xPSR_DIV8;
+
+	/* Do not loop-search if PM (1 ~ 256) alone can serve the ratio */
+	if (ratio <= 256) {
+		pm = ratio;
+		fp = 1;
+		goto out;
+	}
+
+	/* Set the max fluctuation -- 0.1% of the max devisor */
+	savesub = (psr ? 1 : 8)  * 256 * maxfp / 1000;
+
+	/* Find the best value for PM */
+	for (i = 1; i <= 256; i++) {
+		for (j = 1; j <= maxfp; j++) {
+			/* PSR (1 or 8) * PM (1 ~ 256) * FP (1 ~ 16) */
+			prod = (psr ? 1 : 8) * i * j;
+
+			if (prod == ratio)
+				sub = 0;
+			else if (prod / ratio == 1)
+				sub = prod - ratio;
+			else if (ratio / prod == 1)
+				sub = ratio - prod;
+			else
+				continue;
+
+			/* Calculate the fraction */
+			sub = sub * 1000 / ratio;
+			if (sub < savesub) {
+				savesub = sub;
+				pm = i;
+				fp = j;
+			}
+
+			/* We are lucky */
+			if (savesub == 0)
+				goto out;
+		}
+	}
+
+	if (pm == 999) {
+		dev_err(dai->dev, "failed to calculate proper divisors\n");
+		return -EINVAL;
+	}
+
+out:
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xCCR(tx),
+			   ESAI_xCCR_xPSR_MASK | ESAI_xCCR_xPM_MASK,
+			   psr | ESAI_xCCR_xPM(pm));
+
+out_fp:
+	/* Bypass fp if not being required */
+	if (maxfp <= 1)
+		return 0;
+
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xCCR(tx),
+			   ESAI_xCCR_xFP_MASK, ESAI_xCCR_xFP(fp));
+
+	return 0;
+}
+
+/**
+ * fsl_esai_set_dai_sysclk - configure the clock frequency of MCLK (HCKT/HCKR)
+ * @dai: pointer to DAI
+ * @clk_id: The clock source of HCKT/HCKR
+ *	  (Input from outside; output from inside, FSYS or EXTAL)
+ * @freq: The required clock rate of HCKT/HCKR
+ * @dir: The clock direction of HCKT/HCKR
+ *
+ * Note: If the direction is input, we do not care about clk_id.
+ */
+static int fsl_esai_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
+				   unsigned int freq, int dir)
+{
+	struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
+	struct clk *clksrc = esai_priv->extalclk;
+	bool tx = (clk_id <= ESAI_HCKT_EXTAL || esai_priv->synchronous);
+	bool in = dir == SND_SOC_CLOCK_IN;
+	u32 ratio, ecr = 0;
+	unsigned long clk_rate;
+	int ret;
+
+	if (freq == 0) {
+		dev_err(dai->dev, "%sput freq of HCK%c should not be 0Hz\n",
+			in ? "in" : "out", tx ? 'T' : 'R');
+		return -EINVAL;
+	}
+
+	/* Bypass divider settings if the requirement doesn't change */
+	if (freq == esai_priv->hck_rate[tx] && dir == esai_priv->hck_dir[tx])
+		return 0;
+
+	/* sck_div can be only bypassed if ETO/ERO=0 and SNC_SOC_CLOCK_OUT */
+	esai_priv->sck_div[tx] = true;
+
+	/* Set the direction of HCKT/HCKR pins */
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xCCR(tx),
+			   ESAI_xCCR_xHCKD, in ? 0 : ESAI_xCCR_xHCKD);
+
+	if (in)
+		goto out;
+
+	switch (clk_id) {
+	case ESAI_HCKT_FSYS:
+	case ESAI_HCKR_FSYS:
+		clksrc = esai_priv->fsysclk;
+		break;
+	case ESAI_HCKT_EXTAL:
+		ecr |= ESAI_ECR_ETI;
+		break;
+	case ESAI_HCKR_EXTAL:
+		ecr |= esai_priv->synchronous ? ESAI_ECR_ETI : ESAI_ECR_ERI;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (IS_ERR(clksrc)) {
+		dev_err(dai->dev, "no assigned %s clock\n",
+			(clk_id % 2) ? "extal" : "fsys");
+		return PTR_ERR(clksrc);
+	}
+	clk_rate = clk_get_rate(clksrc);
+
+	ratio = clk_rate / freq;
+	if (ratio * freq > clk_rate)
+		ret = ratio * freq - clk_rate;
+	else if (ratio * freq < clk_rate)
+		ret = clk_rate - ratio * freq;
+	else
+		ret = 0;
+
+	/* Block if clock source can not be divided into the required rate */
+	if (ret != 0 && clk_rate / ret < 1000) {
+		dev_err(dai->dev, "failed to derive required HCK%c rate\n",
+				tx ? 'T' : 'R');
+		return -EINVAL;
+	}
+
+	/* Only EXTAL source can be output directly without using PSR and PM */
+	if (ratio == 1 && clksrc == esai_priv->extalclk) {
+		/* Bypass all the dividers if not being needed */
+		ecr |= tx ? ESAI_ECR_ETO : ESAI_ECR_ERO;
+		goto out;
+	} else if (ratio < 2) {
+		/* The ratio should be no less than 2 if using other sources */
+		dev_err(dai->dev, "failed to derive required HCK%c rate\n",
+				tx ? 'T' : 'R');
+		return -EINVAL;
+	}
+
+	ret = fsl_esai_divisor_cal(dai, tx, ratio, false, 0);
+	if (ret)
+		return ret;
+
+	esai_priv->sck_div[tx] = false;
+
+out:
+	esai_priv->hck_dir[tx] = dir;
+	esai_priv->hck_rate[tx] = freq;
+
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_ECR,
+			   tx ? ESAI_ECR_ETI | ESAI_ECR_ETO :
+			   ESAI_ECR_ERI | ESAI_ECR_ERO, ecr);
+
+	return 0;
+}
+
+/**
+ * fsl_esai_set_bclk - configure the related dividers according to the bclk rate
+ * @dai: pointer to DAI
+ * @tx: direction boolean
+ * @freq: bclk freq
+ */
+static int fsl_esai_set_bclk(struct snd_soc_dai *dai, bool tx, u32 freq)
+{
+	struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
+	u32 hck_rate = esai_priv->hck_rate[tx];
+	u32 sub, ratio = hck_rate / freq;
+	int ret;
+
+	/* Don't apply for fully consumer mode or unchanged bclk */
+	if (esai_priv->consumer_mode || esai_priv->sck_rate[tx] == freq)
+		return 0;
+
+	if (ratio * freq > hck_rate)
+		sub = ratio * freq - hck_rate;
+	else if (ratio * freq < hck_rate)
+		sub = hck_rate - ratio * freq;
+	else
+		sub = 0;
+
+	/* Block if clock source can not be divided into the required rate */
+	if (sub != 0 && hck_rate / sub < 1000) {
+		dev_err(dai->dev, "failed to derive required SCK%c rate\n",
+				tx ? 'T' : 'R');
+		return -EINVAL;
+	}
+
+	/* The ratio should be contented by FP alone if bypassing PM and PSR */
+	if (!esai_priv->sck_div[tx] && (ratio > 16 || ratio == 0)) {
+		dev_err(dai->dev, "the ratio is out of range (1 ~ 16)\n");
+		return -EINVAL;
+	}
+
+	ret = fsl_esai_divisor_cal(dai, tx, ratio, true,
+			esai_priv->sck_div[tx] ? 0 : ratio);
+	if (ret)
+		return ret;
+
+	/* Save current bclk rate */
+	esai_priv->sck_rate[tx] = freq;
+
+	return 0;
+}
+
+static int fsl_esai_set_dai_tdm_slot(struct snd_soc_dai *dai, u32 tx_mask,
+				     u32 rx_mask, int slots, int slot_width)
+{
+	struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
+
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_TCCR,
+			   ESAI_xCCR_xDC_MASK, ESAI_xCCR_xDC(slots));
+
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_RCCR,
+			   ESAI_xCCR_xDC_MASK, ESAI_xCCR_xDC(slots));
+
+	esai_priv->slot_width = slot_width;
+	esai_priv->slots = slots;
+	esai_priv->tx_mask = tx_mask;
+	esai_priv->rx_mask = rx_mask;
+
+	return 0;
+}
+
+static int fsl_esai_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
+	u32 xcr = 0, xccr = 0, mask;
+
+	/* DAI mode */
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		/* Data on rising edge of bclk, frame low, 1clk before data */
+		xcr |= ESAI_xCR_xFSR;
+		xccr |= ESAI_xCCR_xFSP | ESAI_xCCR_xCKP | ESAI_xCCR_xHCKP;
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		/* Data on rising edge of bclk, frame high */
+		xccr |= ESAI_xCCR_xCKP | ESAI_xCCR_xHCKP;
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		/* Data on rising edge of bclk, frame high, right aligned */
+		xccr |= ESAI_xCCR_xCKP | ESAI_xCCR_xHCKP;
+		xcr  |= ESAI_xCR_xWA;
+		break;
+	case SND_SOC_DAIFMT_DSP_A:
+		/* Data on rising edge of bclk, frame high, 1clk before data */
+		xcr |= ESAI_xCR_xFSL | ESAI_xCR_xFSR;
+		xccr |= ESAI_xCCR_xCKP | ESAI_xCCR_xHCKP;
+		break;
+	case SND_SOC_DAIFMT_DSP_B:
+		/* Data on rising edge of bclk, frame high */
+		xcr |= ESAI_xCR_xFSL;
+		xccr |= ESAI_xCCR_xCKP | ESAI_xCCR_xHCKP;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* DAI clock inversion */
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		/* Nothing to do for both normal cases */
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		/* Invert bit clock */
+		xccr ^= ESAI_xCCR_xCKP | ESAI_xCCR_xHCKP;
+		break;
+	case SND_SOC_DAIFMT_NB_IF:
+		/* Invert frame clock */
+		xccr ^= ESAI_xCCR_xFSP;
+		break;
+	case SND_SOC_DAIFMT_IB_IF:
+		/* Invert both clocks */
+		xccr ^= ESAI_xCCR_xCKP | ESAI_xCCR_xHCKP | ESAI_xCCR_xFSP;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	esai_priv->consumer_mode = false;
+
+	/* DAI clock provider masks */
+	switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+	case SND_SOC_DAIFMT_BC_FC:
+		esai_priv->consumer_mode = true;
+		break;
+	case SND_SOC_DAIFMT_BP_FC:
+		xccr |= ESAI_xCCR_xCKD;
+		break;
+	case SND_SOC_DAIFMT_BC_FP:
+		xccr |= ESAI_xCCR_xFSD;
+		break;
+	case SND_SOC_DAIFMT_BP_FP:
+		xccr |= ESAI_xCCR_xFSD | ESAI_xCCR_xCKD;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	mask = ESAI_xCR_xFSL | ESAI_xCR_xFSR | ESAI_xCR_xWA;
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_TCR, mask, xcr);
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_RCR, mask, xcr);
+
+	mask = ESAI_xCCR_xCKP | ESAI_xCCR_xHCKP | ESAI_xCCR_xFSP |
+		ESAI_xCCR_xFSD | ESAI_xCCR_xCKD;
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_TCCR, mask, xccr);
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_RCCR, mask, xccr);
+
+	return 0;
+}
+
+static int fsl_esai_startup(struct snd_pcm_substream *substream,
+			    struct snd_soc_dai *dai)
+{
+	struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
+
+	if (!snd_soc_dai_active(dai)) {
+		/* Set synchronous mode */
+		regmap_update_bits(esai_priv->regmap, REG_ESAI_SAICR,
+				   ESAI_SAICR_SYNC, esai_priv->synchronous ?
+				   ESAI_SAICR_SYNC : 0);
+
+		/* Set slots count */
+		regmap_update_bits(esai_priv->regmap, REG_ESAI_TCCR,
+				   ESAI_xCCR_xDC_MASK,
+				   ESAI_xCCR_xDC(esai_priv->slots));
+		regmap_update_bits(esai_priv->regmap, REG_ESAI_RCCR,
+				   ESAI_xCCR_xDC_MASK,
+				   ESAI_xCCR_xDC(esai_priv->slots));
+	}
+
+	return 0;
+
+}
+
+static int fsl_esai_hw_params(struct snd_pcm_substream *substream,
+			      struct snd_pcm_hw_params *params,
+			      struct snd_soc_dai *dai)
+{
+	struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+	u32 width = params_width(params);
+	u32 channels = params_channels(params);
+	u32 pins = DIV_ROUND_UP(channels, esai_priv->slots);
+	u32 slot_width = width;
+	u32 bclk, mask, val;
+	int ret;
+
+	/* Override slot_width if being specifically set */
+	if (esai_priv->slot_width)
+		slot_width = esai_priv->slot_width;
+
+	bclk = params_rate(params) * slot_width * esai_priv->slots;
+
+	ret = fsl_esai_set_bclk(dai, esai_priv->synchronous || tx, bclk);
+	if (ret)
+		return ret;
+
+	mask = ESAI_xCR_xSWS_MASK;
+	val = ESAI_xCR_xSWS(slot_width, width);
+
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx), mask, val);
+	/* Recording in synchronous mode needs to set TCR also */
+	if (!tx && esai_priv->synchronous)
+		regmap_update_bits(esai_priv->regmap, REG_ESAI_TCR, mask, val);
+
+	/* Use Normal mode to support monaural audio */
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx),
+			   ESAI_xCR_xMOD_MASK, params_channels(params) > 1 ?
+			   ESAI_xCR_xMOD_NETWORK : 0);
+
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx),
+			   ESAI_xFCR_xFR_MASK, ESAI_xFCR_xFR);
+
+	mask = ESAI_xFCR_xFR_MASK | ESAI_xFCR_xWA_MASK | ESAI_xFCR_xFWM_MASK |
+	      (tx ? ESAI_xFCR_TE_MASK | ESAI_xFCR_TIEN : ESAI_xFCR_RE_MASK);
+	val = ESAI_xFCR_xWA(width) | ESAI_xFCR_xFWM(esai_priv->fifo_depth) |
+	     (tx ? ESAI_xFCR_TE(pins) | ESAI_xFCR_TIEN : ESAI_xFCR_RE(pins));
+
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx), mask, val);
+
+	if (tx)
+		regmap_update_bits(esai_priv->regmap, REG_ESAI_TCR,
+				ESAI_xCR_PADC, ESAI_xCR_PADC);
+
+	/* Remove ESAI personal reset by configuring ESAI_PCRC and ESAI_PRRC */
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_PRRC,
+			   ESAI_PRRC_PDC_MASK, ESAI_PRRC_PDC(ESAI_GPIO));
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_PCRC,
+			   ESAI_PCRC_PC_MASK, ESAI_PCRC_PC(ESAI_GPIO));
+	return 0;
+}
+
+static int fsl_esai_hw_init(struct fsl_esai *esai_priv)
+{
+	struct platform_device *pdev = esai_priv->pdev;
+	int ret;
+
+	/* Reset ESAI unit */
+	ret = regmap_update_bits(esai_priv->regmap, REG_ESAI_ECR,
+				 ESAI_ECR_ESAIEN_MASK | ESAI_ECR_ERST_MASK,
+				 ESAI_ECR_ESAIEN | ESAI_ECR_ERST);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to reset ESAI: %d\n", ret);
+		return ret;
+	}
+
+	/*
+	 * We need to enable ESAI so as to access some of its registers.
+	 * Otherwise, we would fail to dump regmap from user space.
+	 */
+	ret = regmap_update_bits(esai_priv->regmap, REG_ESAI_ECR,
+				 ESAI_ECR_ESAIEN_MASK | ESAI_ECR_ERST_MASK,
+				 ESAI_ECR_ESAIEN);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to enable ESAI: %d\n", ret);
+		return ret;
+	}
+
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_PRRC,
+			   ESAI_PRRC_PDC_MASK, 0);
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_PCRC,
+			   ESAI_PCRC_PC_MASK, 0);
+
+	return 0;
+}
+
+static int fsl_esai_register_restore(struct fsl_esai *esai_priv)
+{
+	int ret;
+
+	/* FIFO reset for safety */
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_TFCR,
+			   ESAI_xFCR_xFR, ESAI_xFCR_xFR);
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_RFCR,
+			   ESAI_xFCR_xFR, ESAI_xFCR_xFR);
+
+	regcache_mark_dirty(esai_priv->regmap);
+	ret = regcache_sync(esai_priv->regmap);
+	if (ret)
+		return ret;
+
+	/* FIFO reset done */
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_TFCR, ESAI_xFCR_xFR, 0);
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_RFCR, ESAI_xFCR_xFR, 0);
+
+	return 0;
+}
+
+static void fsl_esai_trigger_start(struct fsl_esai *esai_priv, bool tx)
+{
+	u8 i, channels = esai_priv->channels[tx];
+	u32 pins = DIV_ROUND_UP(channels, esai_priv->slots);
+	u32 mask;
+
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx),
+			   ESAI_xFCR_xFEN_MASK, ESAI_xFCR_xFEN);
+
+	/* Write initial words reqiured by ESAI as normal procedure */
+	for (i = 0; tx && i < channels; i++)
+		regmap_write(esai_priv->regmap, REG_ESAI_ETDR, 0x0);
+
+	/*
+	 * When set the TE/RE in the end of enablement flow, there
+	 * will be channel swap issue for multi data line case.
+	 * In order to workaround this issue, we switch the bit
+	 * enablement sequence to below sequence
+	 * 1) clear the xSMB & xSMA: which is done in probe and
+	 *                           stop state.
+	 * 2) set TE/RE
+	 * 3) set xSMB
+	 * 4) set xSMA:  xSMA is the last one in this flow, which
+	 *               will trigger esai to start.
+	 */
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx),
+			   tx ? ESAI_xCR_TE_MASK : ESAI_xCR_RE_MASK,
+			   tx ? ESAI_xCR_TE(pins) : ESAI_xCR_RE(pins));
+	mask = tx ? esai_priv->tx_mask : esai_priv->rx_mask;
+
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xSMB(tx),
+			   ESAI_xSMB_xS_MASK, ESAI_xSMB_xS(mask));
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xSMA(tx),
+			   ESAI_xSMA_xS_MASK, ESAI_xSMA_xS(mask));
+
+	/* Enable Exception interrupt */
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx),
+			   ESAI_xCR_xEIE_MASK, ESAI_xCR_xEIE);
+}
+
+static void fsl_esai_trigger_stop(struct fsl_esai *esai_priv, bool tx)
+{
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx),
+			   ESAI_xCR_xEIE_MASK, 0);
+
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx),
+			   tx ? ESAI_xCR_TE_MASK : ESAI_xCR_RE_MASK, 0);
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xSMA(tx),
+			   ESAI_xSMA_xS_MASK, 0);
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xSMB(tx),
+			   ESAI_xSMB_xS_MASK, 0);
+
+	/* Disable and reset FIFO */
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx),
+			   ESAI_xFCR_xFR | ESAI_xFCR_xFEN, ESAI_xFCR_xFR);
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx),
+			   ESAI_xFCR_xFR, 0);
+}
+
+static void fsl_esai_hw_reset(struct work_struct *work)
+{
+	struct fsl_esai *esai_priv = container_of(work, struct fsl_esai, work);
+	bool tx = true, rx = false, enabled[2];
+	unsigned long lock_flags;
+	u32 tfcr, rfcr;
+
+	spin_lock_irqsave(&esai_priv->lock, lock_flags);
+	/* Save the registers */
+	regmap_read(esai_priv->regmap, REG_ESAI_TFCR, &tfcr);
+	regmap_read(esai_priv->regmap, REG_ESAI_RFCR, &rfcr);
+	enabled[tx] = tfcr & ESAI_xFCR_xFEN;
+	enabled[rx] = rfcr & ESAI_xFCR_xFEN;
+
+	/* Stop the tx & rx */
+	fsl_esai_trigger_stop(esai_priv, tx);
+	fsl_esai_trigger_stop(esai_priv, rx);
+
+	/* Reset the esai, and ignore return value */
+	fsl_esai_hw_init(esai_priv);
+
+	/* Enforce ESAI personal resets for both TX and RX */
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_TCR,
+			   ESAI_xCR_xPR_MASK, ESAI_xCR_xPR);
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_RCR,
+			   ESAI_xCR_xPR_MASK, ESAI_xCR_xPR);
+
+	/* Restore registers by regcache_sync, and ignore return value */
+	fsl_esai_register_restore(esai_priv);
+
+	/* Remove ESAI personal resets by configuring PCRC and PRRC also */
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_TCR,
+			   ESAI_xCR_xPR_MASK, 0);
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_RCR,
+			   ESAI_xCR_xPR_MASK, 0);
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_PRRC,
+			   ESAI_PRRC_PDC_MASK, ESAI_PRRC_PDC(ESAI_GPIO));
+	regmap_update_bits(esai_priv->regmap, REG_ESAI_PCRC,
+			   ESAI_PCRC_PC_MASK, ESAI_PCRC_PC(ESAI_GPIO));
+
+	/* Restart tx / rx, if they already enabled */
+	if (enabled[tx])
+		fsl_esai_trigger_start(esai_priv, tx);
+	if (enabled[rx])
+		fsl_esai_trigger_start(esai_priv, rx);
+
+	spin_unlock_irqrestore(&esai_priv->lock, lock_flags);
+}
+
+static int fsl_esai_trigger(struct snd_pcm_substream *substream, int cmd,
+			    struct snd_soc_dai *dai)
+{
+	struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+	unsigned long lock_flags;
+
+	esai_priv->channels[tx] = substream->runtime->channels;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		spin_lock_irqsave(&esai_priv->lock, lock_flags);
+		fsl_esai_trigger_start(esai_priv, tx);
+		spin_unlock_irqrestore(&esai_priv->lock, lock_flags);
+		break;
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		spin_lock_irqsave(&esai_priv->lock, lock_flags);
+		fsl_esai_trigger_stop(esai_priv, tx);
+		spin_unlock_irqrestore(&esai_priv->lock, lock_flags);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops fsl_esai_dai_ops = {
+	.startup = fsl_esai_startup,
+	.trigger = fsl_esai_trigger,
+	.hw_params = fsl_esai_hw_params,
+	.set_sysclk = fsl_esai_set_dai_sysclk,
+	.set_fmt = fsl_esai_set_dai_fmt,
+	.set_tdm_slot = fsl_esai_set_dai_tdm_slot,
+};
+
+static int fsl_esai_dai_probe(struct snd_soc_dai *dai)
+{
+	struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
+
+	snd_soc_dai_init_dma_data(dai, &esai_priv->dma_params_tx,
+				  &esai_priv->dma_params_rx);
+
+	return 0;
+}
+
+static struct snd_soc_dai_driver fsl_esai_dai = {
+	.probe = fsl_esai_dai_probe,
+	.playback = {
+		.stream_name = "CPU-Playback",
+		.channels_min = 1,
+		.channels_max = 12,
+		.rates = SNDRV_PCM_RATE_8000_192000,
+		.formats = FSL_ESAI_FORMATS,
+	},
+	.capture = {
+		.stream_name = "CPU-Capture",
+		.channels_min = 1,
+		.channels_max = 8,
+		.rates = SNDRV_PCM_RATE_8000_192000,
+		.formats = FSL_ESAI_FORMATS,
+	},
+	.ops = &fsl_esai_dai_ops,
+};
+
+static const struct snd_soc_component_driver fsl_esai_component = {
+	.name			= "fsl-esai",
+	.legacy_dai_naming	= 1,
+};
+
+static const struct reg_default fsl_esai_reg_defaults[] = {
+	{REG_ESAI_ETDR,	 0x00000000},
+	{REG_ESAI_ECR,	 0x00000000},
+	{REG_ESAI_TFCR,	 0x00000000},
+	{REG_ESAI_RFCR,	 0x00000000},
+	{REG_ESAI_TX0,	 0x00000000},
+	{REG_ESAI_TX1,	 0x00000000},
+	{REG_ESAI_TX2,	 0x00000000},
+	{REG_ESAI_TX3,	 0x00000000},
+	{REG_ESAI_TX4,	 0x00000000},
+	{REG_ESAI_TX5,	 0x00000000},
+	{REG_ESAI_TSR,	 0x00000000},
+	{REG_ESAI_SAICR, 0x00000000},
+	{REG_ESAI_TCR,	 0x00000000},
+	{REG_ESAI_TCCR,	 0x00000000},
+	{REG_ESAI_RCR,	 0x00000000},
+	{REG_ESAI_RCCR,	 0x00000000},
+	{REG_ESAI_TSMA,  0x0000ffff},
+	{REG_ESAI_TSMB,  0x0000ffff},
+	{REG_ESAI_RSMA,  0x0000ffff},
+	{REG_ESAI_RSMB,  0x0000ffff},
+	{REG_ESAI_PRRC,  0x00000000},
+	{REG_ESAI_PCRC,  0x00000000},
+};
+
+static bool fsl_esai_readable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case REG_ESAI_ERDR:
+	case REG_ESAI_ECR:
+	case REG_ESAI_ESR:
+	case REG_ESAI_TFCR:
+	case REG_ESAI_TFSR:
+	case REG_ESAI_RFCR:
+	case REG_ESAI_RFSR:
+	case REG_ESAI_RX0:
+	case REG_ESAI_RX1:
+	case REG_ESAI_RX2:
+	case REG_ESAI_RX3:
+	case REG_ESAI_SAISR:
+	case REG_ESAI_SAICR:
+	case REG_ESAI_TCR:
+	case REG_ESAI_TCCR:
+	case REG_ESAI_RCR:
+	case REG_ESAI_RCCR:
+	case REG_ESAI_TSMA:
+	case REG_ESAI_TSMB:
+	case REG_ESAI_RSMA:
+	case REG_ESAI_RSMB:
+	case REG_ESAI_PRRC:
+	case REG_ESAI_PCRC:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool fsl_esai_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case REG_ESAI_ERDR:
+	case REG_ESAI_ESR:
+	case REG_ESAI_TFSR:
+	case REG_ESAI_RFSR:
+	case REG_ESAI_RX0:
+	case REG_ESAI_RX1:
+	case REG_ESAI_RX2:
+	case REG_ESAI_RX3:
+	case REG_ESAI_SAISR:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool fsl_esai_writeable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case REG_ESAI_ETDR:
+	case REG_ESAI_ECR:
+	case REG_ESAI_TFCR:
+	case REG_ESAI_RFCR:
+	case REG_ESAI_TX0:
+	case REG_ESAI_TX1:
+	case REG_ESAI_TX2:
+	case REG_ESAI_TX3:
+	case REG_ESAI_TX4:
+	case REG_ESAI_TX5:
+	case REG_ESAI_TSR:
+	case REG_ESAI_SAICR:
+	case REG_ESAI_TCR:
+	case REG_ESAI_TCCR:
+	case REG_ESAI_RCR:
+	case REG_ESAI_RCCR:
+	case REG_ESAI_TSMA:
+	case REG_ESAI_TSMB:
+	case REG_ESAI_RSMA:
+	case REG_ESAI_RSMB:
+	case REG_ESAI_PRRC:
+	case REG_ESAI_PCRC:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct regmap_config fsl_esai_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+
+	.max_register = REG_ESAI_PCRC,
+	.reg_defaults = fsl_esai_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(fsl_esai_reg_defaults),
+	.readable_reg = fsl_esai_readable_reg,
+	.volatile_reg = fsl_esai_volatile_reg,
+	.writeable_reg = fsl_esai_writeable_reg,
+	.cache_type = REGCACHE_FLAT,
+};
+
+static int fsl_esai_runtime_resume(struct device *dev);
+static int fsl_esai_runtime_suspend(struct device *dev);
+
+static int fsl_esai_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct fsl_esai *esai_priv;
+	struct resource *res;
+	const __be32 *iprop;
+	void __iomem *regs;
+	int irq, ret;
+
+	esai_priv = devm_kzalloc(&pdev->dev, sizeof(*esai_priv), GFP_KERNEL);
+	if (!esai_priv)
+		return -ENOMEM;
+
+	esai_priv->pdev = pdev;
+	snprintf(esai_priv->name, sizeof(esai_priv->name), "%pOFn", np);
+
+	esai_priv->soc = of_device_get_match_data(&pdev->dev);
+
+	/* Get the addresses and IRQ */
+	regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+	if (IS_ERR(regs))
+		return PTR_ERR(regs);
+
+	esai_priv->regmap = devm_regmap_init_mmio(&pdev->dev, regs, &fsl_esai_regmap_config);
+	if (IS_ERR(esai_priv->regmap)) {
+		dev_err(&pdev->dev, "failed to init regmap: %ld\n",
+				PTR_ERR(esai_priv->regmap));
+		return PTR_ERR(esai_priv->regmap);
+	}
+
+	esai_priv->coreclk = devm_clk_get(&pdev->dev, "core");
+	if (IS_ERR(esai_priv->coreclk)) {
+		dev_err(&pdev->dev, "failed to get core clock: %ld\n",
+				PTR_ERR(esai_priv->coreclk));
+		return PTR_ERR(esai_priv->coreclk);
+	}
+
+	esai_priv->extalclk = devm_clk_get(&pdev->dev, "extal");
+	if (IS_ERR(esai_priv->extalclk))
+		dev_warn(&pdev->dev, "failed to get extal clock: %ld\n",
+				PTR_ERR(esai_priv->extalclk));
+
+	esai_priv->fsysclk = devm_clk_get(&pdev->dev, "fsys");
+	if (IS_ERR(esai_priv->fsysclk))
+		dev_warn(&pdev->dev, "failed to get fsys clock: %ld\n",
+				PTR_ERR(esai_priv->fsysclk));
+
+	esai_priv->spbaclk = devm_clk_get(&pdev->dev, "spba");
+	if (IS_ERR(esai_priv->spbaclk))
+		dev_warn(&pdev->dev, "failed to get spba clock: %ld\n",
+				PTR_ERR(esai_priv->spbaclk));
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	ret = devm_request_irq(&pdev->dev, irq, esai_isr, IRQF_SHARED,
+			       esai_priv->name, esai_priv);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to claim irq %u\n", irq);
+		return ret;
+	}
+
+	/* Set a default slot number */
+	esai_priv->slots = 2;
+
+	/* Set a default clock provider state */
+	esai_priv->consumer_mode = true;
+
+	/* Determine the FIFO depth */
+	iprop = of_get_property(np, "fsl,fifo-depth", NULL);
+	if (iprop)
+		esai_priv->fifo_depth = be32_to_cpup(iprop);
+	else
+		esai_priv->fifo_depth = 64;
+
+	esai_priv->dma_params_tx.maxburst = 16;
+	esai_priv->dma_params_rx.maxburst = 16;
+	esai_priv->dma_params_tx.addr = res->start + REG_ESAI_ETDR;
+	esai_priv->dma_params_rx.addr = res->start + REG_ESAI_ERDR;
+
+	esai_priv->synchronous =
+		of_property_read_bool(np, "fsl,esai-synchronous");
+
+	/* Implement full symmetry for synchronous mode */
+	if (esai_priv->synchronous) {
+		fsl_esai_dai.symmetric_rate = 1;
+		fsl_esai_dai.symmetric_channels = 1;
+		fsl_esai_dai.symmetric_sample_bits = 1;
+	}
+
+	dev_set_drvdata(&pdev->dev, esai_priv);
+	spin_lock_init(&esai_priv->lock);
+	pm_runtime_enable(&pdev->dev);
+	if (!pm_runtime_enabled(&pdev->dev)) {
+		ret = fsl_esai_runtime_resume(&pdev->dev);
+		if (ret)
+			goto err_pm_disable;
+	}
+
+	ret = pm_runtime_resume_and_get(&pdev->dev);
+	if (ret < 0)
+		goto err_pm_get_sync;
+
+	ret = fsl_esai_hw_init(esai_priv);
+	if (ret)
+		goto err_pm_get_sync;
+
+	esai_priv->tx_mask = 0xFFFFFFFF;
+	esai_priv->rx_mask = 0xFFFFFFFF;
+
+	/* Clear the TSMA, TSMB, RSMA, RSMB */
+	regmap_write(esai_priv->regmap, REG_ESAI_TSMA, 0);
+	regmap_write(esai_priv->regmap, REG_ESAI_TSMB, 0);
+	regmap_write(esai_priv->regmap, REG_ESAI_RSMA, 0);
+	regmap_write(esai_priv->regmap, REG_ESAI_RSMB, 0);
+
+	ret = pm_runtime_put_sync(&pdev->dev);
+	if (ret < 0 && ret != -ENOSYS)
+		goto err_pm_get_sync;
+
+	/*
+	 * Register platform component before registering cpu dai for there
+	 * is not defer probe for platform component in snd_soc_add_pcm_runtime().
+	 */
+	ret = imx_pcm_dma_init(pdev);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to init imx pcm dma: %d\n", ret);
+		goto err_pm_get_sync;
+	}
+
+	ret = devm_snd_soc_register_component(&pdev->dev, &fsl_esai_component,
+					      &fsl_esai_dai, 1);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to register DAI: %d\n", ret);
+		goto err_pm_get_sync;
+	}
+
+	INIT_WORK(&esai_priv->work, fsl_esai_hw_reset);
+
+	return ret;
+
+err_pm_get_sync:
+	if (!pm_runtime_status_suspended(&pdev->dev))
+		fsl_esai_runtime_suspend(&pdev->dev);
+err_pm_disable:
+	pm_runtime_disable(&pdev->dev);
+	return ret;
+}
+
+static int fsl_esai_remove(struct platform_device *pdev)
+{
+	struct fsl_esai *esai_priv = platform_get_drvdata(pdev);
+
+	pm_runtime_disable(&pdev->dev);
+	if (!pm_runtime_status_suspended(&pdev->dev))
+		fsl_esai_runtime_suspend(&pdev->dev);
+
+	cancel_work_sync(&esai_priv->work);
+
+	return 0;
+}
+
+static const struct of_device_id fsl_esai_dt_ids[] = {
+	{ .compatible = "fsl,imx35-esai", .data = &fsl_esai_imx35 },
+	{ .compatible = "fsl,vf610-esai", .data = &fsl_esai_vf610 },
+	{ .compatible = "fsl,imx6ull-esai", .data = &fsl_esai_imx6ull },
+	{}
+};
+MODULE_DEVICE_TABLE(of, fsl_esai_dt_ids);
+
+static int fsl_esai_runtime_resume(struct device *dev)
+{
+	struct fsl_esai *esai = dev_get_drvdata(dev);
+	int ret;
+
+	/*
+	 * Some platforms might use the same bit to gate all three or two of
+	 * clocks, so keep all clocks open/close at the same time for safety
+	 */
+	ret = clk_prepare_enable(esai->coreclk);
+	if (ret)
+		return ret;
+	if (!IS_ERR(esai->spbaclk)) {
+		ret = clk_prepare_enable(esai->spbaclk);
+		if (ret)
+			goto err_spbaclk;
+	}
+	if (!IS_ERR(esai->extalclk)) {
+		ret = clk_prepare_enable(esai->extalclk);
+		if (ret)
+			goto err_extalclk;
+	}
+	if (!IS_ERR(esai->fsysclk)) {
+		ret = clk_prepare_enable(esai->fsysclk);
+		if (ret)
+			goto err_fsysclk;
+	}
+
+	regcache_cache_only(esai->regmap, false);
+
+	ret = fsl_esai_register_restore(esai);
+	if (ret)
+		goto err_regcache_sync;
+
+	return 0;
+
+err_regcache_sync:
+	if (!IS_ERR(esai->fsysclk))
+		clk_disable_unprepare(esai->fsysclk);
+err_fsysclk:
+	if (!IS_ERR(esai->extalclk))
+		clk_disable_unprepare(esai->extalclk);
+err_extalclk:
+	if (!IS_ERR(esai->spbaclk))
+		clk_disable_unprepare(esai->spbaclk);
+err_spbaclk:
+	clk_disable_unprepare(esai->coreclk);
+
+	return ret;
+}
+
+static int fsl_esai_runtime_suspend(struct device *dev)
+{
+	struct fsl_esai *esai = dev_get_drvdata(dev);
+
+	regcache_cache_only(esai->regmap, true);
+
+	if (!IS_ERR(esai->fsysclk))
+		clk_disable_unprepare(esai->fsysclk);
+	if (!IS_ERR(esai->extalclk))
+		clk_disable_unprepare(esai->extalclk);
+	if (!IS_ERR(esai->spbaclk))
+		clk_disable_unprepare(esai->spbaclk);
+	clk_disable_unprepare(esai->coreclk);
+
+	return 0;
+}
+
+static const struct dev_pm_ops fsl_esai_pm_ops = {
+	SET_RUNTIME_PM_OPS(fsl_esai_runtime_suspend,
+			   fsl_esai_runtime_resume,
+			   NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+};
+
+static struct platform_driver fsl_esai_driver = {
+	.probe = fsl_esai_probe,
+	.remove = fsl_esai_remove,
+	.driver = {
+		.name = "fsl-esai-dai",
+		.pm = &fsl_esai_pm_ops,
+		.of_match_table = fsl_esai_dt_ids,
+	},
+};
+
+module_platform_driver(fsl_esai_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("Freescale ESAI CPU DAI driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:fsl-esai-dai");