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, 897 insertions, 0 deletions

diff --git a/sound/soc/codecs/wcd-clsh-v2.c b/sound/soc/codecs/wcd-clsh-v2.c
new file mode 100644
index 000000000..a75db27e5
--- /dev/null
+++ b/sound/soc/codecs/wcd-clsh-v2.c
@@ -0,0 +1,897 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
+// Copyright (c) 2017-2018, Linaro Limited
+
+#include <linux/slab.h>
+#include <sound/soc.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include "wcd9335.h"
+#include "wcd-clsh-v2.h"
+
+struct wcd_clsh_ctrl {
+	int state;
+	int mode;
+	int flyback_users;
+	int buck_users;
+	int clsh_users;
+	int codec_version;
+	struct snd_soc_component *comp;
+};
+
+/* Class-H registers for codecs from and above WCD9335 */
+#define WCD9XXX_A_CDC_RX0_RX_PATH_CFG0			WCD9335_REG(0xB, 0x42)
+#define WCD9XXX_A_CDC_RX_PATH_CLSH_EN_MASK		BIT(6)
+#define WCD9XXX_A_CDC_RX_PATH_CLSH_ENABLE		BIT(6)
+#define WCD9XXX_A_CDC_RX_PATH_CLSH_DISABLE		0
+#define WCD9XXX_A_CDC_RX1_RX_PATH_CFG0			WCD9335_REG(0xB, 0x56)
+#define WCD9XXX_A_CDC_RX2_RX_PATH_CFG0			WCD9335_REG(0xB, 0x6A)
+#define WCD9XXX_A_CDC_CLSH_K1_MSB			WCD9335_REG(0xC, 0x08)
+#define WCD9XXX_A_CDC_CLSH_K1_MSB_COEF_MASK		GENMASK(3, 0)
+#define WCD9XXX_A_CDC_CLSH_K1_LSB			WCD9335_REG(0xC, 0x09)
+#define WCD9XXX_A_CDC_CLSH_K1_LSB_COEF_MASK		GENMASK(7, 0)
+#define WCD9XXX_A_ANA_RX_SUPPLIES			WCD9335_REG(0x6, 0x08)
+#define WCD9XXX_A_ANA_RX_REGULATOR_MODE_MASK		BIT(1)
+#define WCD9XXX_A_ANA_RX_REGULATOR_MODE_CLS_H		0
+#define WCD9XXX_A_ANA_RX_REGULATOR_MODE_CLS_AB		BIT(1)
+#define WCD9XXX_A_ANA_RX_VNEG_PWR_LVL_MASK		BIT(2)
+#define WCD9XXX_A_ANA_RX_VNEG_PWR_LVL_UHQA		BIT(2)
+#define WCD9XXX_A_ANA_RX_VNEG_PWR_LVL_DEFAULT		0
+#define WCD9XXX_A_ANA_RX_VPOS_PWR_LVL_MASK		BIT(3)
+#define WCD9XXX_A_ANA_RX_VPOS_PWR_LVL_UHQA		BIT(3)
+#define WCD9XXX_A_ANA_RX_VPOS_PWR_LVL_DEFAULT		0
+#define WCD9XXX_A_ANA_RX_VNEG_EN_MASK			BIT(6)
+#define WCD9XXX_A_ANA_RX_VNEG_EN_SHIFT			6
+#define WCD9XXX_A_ANA_RX_VNEG_ENABLE			BIT(6)
+#define WCD9XXX_A_ANA_RX_VNEG_DISABLE			0
+#define WCD9XXX_A_ANA_RX_VPOS_EN_MASK			BIT(7)
+#define WCD9XXX_A_ANA_RX_VPOS_EN_SHIFT			7
+#define WCD9XXX_A_ANA_RX_VPOS_ENABLE			BIT(7)
+#define WCD9XXX_A_ANA_RX_VPOS_DISABLE			0
+#define WCD9XXX_A_ANA_HPH				WCD9335_REG(0x6, 0x09)
+#define WCD9XXX_A_ANA_HPH_PWR_LEVEL_MASK		GENMASK(3, 2)
+#define WCD9XXX_A_ANA_HPH_PWR_LEVEL_UHQA		0x08
+#define WCD9XXX_A_ANA_HPH_PWR_LEVEL_LP			0x04
+#define WCD9XXX_A_ANA_HPH_PWR_LEVEL_NORMAL		0x0
+#define WCD9XXX_A_CDC_CLSH_CRC				WCD9335_REG(0xC, 0x01)
+#define WCD9XXX_A_CDC_CLSH_CRC_CLK_EN_MASK		BIT(0)
+#define WCD9XXX_A_CDC_CLSH_CRC_CLK_ENABLE		BIT(0)
+#define WCD9XXX_A_CDC_CLSH_CRC_CLK_DISABLE		0
+#define WCD9XXX_FLYBACK_EN				WCD9335_REG(0x6, 0xA4)
+#define WCD9XXX_FLYBACK_EN_DELAY_SEL_MASK		GENMASK(6, 5)
+#define WCD9XXX_FLYBACK_EN_DELAY_26P25_US		0x40
+#define WCD9XXX_FLYBACK_EN_RESET_BY_EXT_MASK		BIT(4)
+#define WCD9XXX_FLYBACK_EN_PWDN_WITHOUT_DELAY		BIT(4)
+#define WCD9XXX_FLYBACK_EN_PWDN_WITH_DELAY			0
+#define WCD9XXX_RX_BIAS_FLYB_BUFF			WCD9335_REG(0x6, 0xC7)
+#define WCD9XXX_RX_BIAS_FLYB_VNEG_5_UA_MASK		GENMASK(7, 4)
+#define WCD9XXX_RX_BIAS_FLYB_VPOS_5_UA_MASK		GENMASK(3, 0)
+#define WCD9XXX_HPH_L_EN				WCD9335_REG(0x6, 0xD3)
+#define WCD9XXX_HPH_CONST_SEL_L_MASK			GENMASK(7, 3)
+#define WCD9XXX_HPH_CONST_SEL_BYPASS			0
+#define WCD9XXX_HPH_CONST_SEL_LP_PATH			0x40
+#define WCD9XXX_HPH_CONST_SEL_HQ_PATH			0x80
+#define WCD9XXX_HPH_R_EN				WCD9335_REG(0x6, 0xD6)
+#define WCD9XXX_HPH_REFBUFF_UHQA_CTL			WCD9335_REG(0x6, 0xDD)
+#define WCD9XXX_HPH_REFBUFF_UHQA_GAIN_MASK		GENMASK(2, 0)
+#define WCD9XXX_CLASSH_CTRL_VCL_2                       WCD9335_REG(0x6, 0x9B)
+#define WCD9XXX_CLASSH_CTRL_VCL_2_VREF_FILT_1_MASK	GENMASK(5, 4)
+#define WCD9XXX_CLASSH_CTRL_VCL_VREF_FILT_R_50KOHM	0x20
+#define WCD9XXX_CLASSH_CTRL_VCL_VREF_FILT_R_0KOHM	0x0
+#define WCD9XXX_CDC_RX1_RX_PATH_CTL			WCD9335_REG(0xB, 0x55)
+#define WCD9XXX_CDC_RX2_RX_PATH_CTL			WCD9335_REG(0xB, 0x69)
+#define WCD9XXX_CDC_CLK_RST_CTRL_MCLK_CONTROL		WCD9335_REG(0xD, 0x41)
+#define WCD9XXX_CDC_CLK_RST_CTRL_MCLK_EN_MASK		BIT(0)
+#define WCD9XXX_CDC_CLK_RST_CTRL_MCLK_11P3_EN_MASK	BIT(1)
+#define WCD9XXX_CLASSH_CTRL_CCL_1                       WCD9335_REG(0x6, 0x9C)
+#define WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_MASK	GENMASK(7, 4)
+#define WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_50MA	0x50
+#define WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_30MA	0x30
+
+#define WCD9XXX_BASE_ADDRESS				0x3000
+#define WCD9XXX_ANA_RX_SUPPLIES				(WCD9XXX_BASE_ADDRESS+0x008)
+#define WCD9XXX_ANA_HPH					(WCD9XXX_BASE_ADDRESS+0x009)
+#define WCD9XXX_CLASSH_MODE_2				(WCD9XXX_BASE_ADDRESS+0x098)
+#define WCD9XXX_CLASSH_MODE_3				(WCD9XXX_BASE_ADDRESS+0x099)
+#define WCD9XXX_FLYBACK_VNEG_CTRL_1			(WCD9XXX_BASE_ADDRESS+0x0A5)
+#define WCD9XXX_FLYBACK_VNEG_CTRL_4			(WCD9XXX_BASE_ADDRESS+0x0A8)
+#define WCD9XXX_FLYBACK_VNEGDAC_CTRL_2			(WCD9XXX_BASE_ADDRESS+0x0AF)
+#define WCD9XXX_RX_BIAS_HPH_LOWPOWER			(WCD9XXX_BASE_ADDRESS+0x0BF)
+#define WCD9XXX_V3_RX_BIAS_FLYB_BUFF			(WCD9XXX_BASE_ADDRESS+0x0C7)
+#define WCD9XXX_HPH_PA_CTL1				(WCD9XXX_BASE_ADDRESS+0x0D1)
+#define WCD9XXX_HPH_NEW_INT_PA_MISC2			(WCD9XXX_BASE_ADDRESS+0x138)
+
+#define CLSH_REQ_ENABLE		true
+#define CLSH_REQ_DISABLE	false
+#define WCD_USLEEP_RANGE	50
+
+enum {
+	DAC_GAIN_0DB = 0,
+	DAC_GAIN_0P2DB,
+	DAC_GAIN_0P4DB,
+	DAC_GAIN_0P6DB,
+	DAC_GAIN_0P8DB,
+	DAC_GAIN_M0P2DB,
+	DAC_GAIN_M0P4DB,
+	DAC_GAIN_M0P6DB,
+};
+
+static inline void wcd_enable_clsh_block(struct wcd_clsh_ctrl *ctrl,
+					 bool enable)
+{
+	struct snd_soc_component *comp = ctrl->comp;
+
+	if ((enable && ++ctrl->clsh_users == 1) ||
+	    (!enable && --ctrl->clsh_users == 0))
+		snd_soc_component_update_bits(comp, WCD9XXX_A_CDC_CLSH_CRC,
+				      WCD9XXX_A_CDC_CLSH_CRC_CLK_EN_MASK,
+				      enable);
+	if (ctrl->clsh_users < 0)
+		ctrl->clsh_users = 0;
+}
+
+static inline void wcd_clsh_set_buck_mode(struct snd_soc_component *comp,
+					  int mode)
+{
+	/* set to HIFI */
+	if (mode == CLS_H_HIFI)
+		snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_RX_SUPPLIES,
+					WCD9XXX_A_ANA_RX_VPOS_PWR_LVL_MASK,
+					WCD9XXX_A_ANA_RX_VPOS_PWR_LVL_UHQA);
+	else
+		snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_RX_SUPPLIES,
+					WCD9XXX_A_ANA_RX_VPOS_PWR_LVL_MASK,
+					WCD9XXX_A_ANA_RX_VPOS_PWR_LVL_DEFAULT);
+}
+
+static void wcd_clsh_v3_set_buck_mode(struct snd_soc_component *component,
+					  int mode)
+{
+	if (mode == CLS_H_HIFI || mode == CLS_H_LOHIFI ||
+	    mode == CLS_AB_HIFI || mode == CLS_AB_LOHIFI)
+		snd_soc_component_update_bits(component,
+				WCD9XXX_ANA_RX_SUPPLIES,
+				0x08, 0x08); /* set to HIFI */
+	else
+		snd_soc_component_update_bits(component,
+				WCD9XXX_ANA_RX_SUPPLIES,
+				0x08, 0x00); /* set to default */
+}
+
+static inline void wcd_clsh_set_flyback_mode(struct snd_soc_component *comp,
+					     int mode)
+{
+	/* set to HIFI */
+	if (mode == CLS_H_HIFI)
+		snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_RX_SUPPLIES,
+					WCD9XXX_A_ANA_RX_VNEG_PWR_LVL_MASK,
+					WCD9XXX_A_ANA_RX_VNEG_PWR_LVL_UHQA);
+	else
+		snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_RX_SUPPLIES,
+					WCD9XXX_A_ANA_RX_VNEG_PWR_LVL_MASK,
+					WCD9XXX_A_ANA_RX_VNEG_PWR_LVL_DEFAULT);
+}
+
+static void wcd_clsh_buck_ctrl(struct wcd_clsh_ctrl *ctrl,
+			       int mode,
+			       bool enable)
+{
+	struct snd_soc_component *comp = ctrl->comp;
+
+	/* enable/disable buck */
+	if ((enable && (++ctrl->buck_users == 1)) ||
+	   (!enable && (--ctrl->buck_users == 0)))
+		snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_RX_SUPPLIES,
+				WCD9XXX_A_ANA_RX_VPOS_EN_MASK,
+				enable << WCD9XXX_A_ANA_RX_VPOS_EN_SHIFT);
+	/*
+	 * 500us sleep is required after buck enable/disable
+	 * as per HW requirement
+	 */
+	usleep_range(500, 500 + WCD_USLEEP_RANGE);
+}
+
+static void wcd_clsh_v3_buck_ctrl(struct snd_soc_component *component,
+			       struct wcd_clsh_ctrl *ctrl,
+			       int mode,
+			       bool enable)
+{
+	/* enable/disable buck */
+	if ((enable && (++ctrl->buck_users == 1)) ||
+	   (!enable && (--ctrl->buck_users == 0))) {
+		snd_soc_component_update_bits(component,
+				WCD9XXX_ANA_RX_SUPPLIES,
+				(1 << 7), (enable << 7));
+		/*
+		 * 500us sleep is required after buck enable/disable
+		 * as per HW requirement
+		 */
+		usleep_range(500, 510);
+		if (mode == CLS_H_LOHIFI || mode == CLS_H_ULP ||
+			mode == CLS_H_HIFI || mode == CLS_H_LP)
+			snd_soc_component_update_bits(component,
+					WCD9XXX_CLASSH_MODE_3,
+					0x02, 0x00);
+
+		snd_soc_component_update_bits(component,
+					WCD9XXX_CLASSH_MODE_2,
+					0xFF, 0x3A);
+		/* 500usec delay is needed as per HW requirement */
+		usleep_range(500, 500 + WCD_USLEEP_RANGE);
+	}
+}
+
+static void wcd_clsh_flyback_ctrl(struct wcd_clsh_ctrl *ctrl,
+				  int mode,
+				  bool enable)
+{
+	struct snd_soc_component *comp = ctrl->comp;
+
+	/* enable/disable flyback */
+	if ((enable && (++ctrl->flyback_users == 1)) ||
+	   (!enable && (--ctrl->flyback_users == 0))) {
+		snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_RX_SUPPLIES,
+				WCD9XXX_A_ANA_RX_VNEG_EN_MASK,
+				enable << WCD9XXX_A_ANA_RX_VNEG_EN_SHIFT);
+		/* 100usec delay is needed as per HW requirement */
+		usleep_range(100, 110);
+	}
+	/*
+	 * 500us sleep is required after flyback enable/disable
+	 * as per HW requirement
+	 */
+	usleep_range(500, 500 + WCD_USLEEP_RANGE);
+}
+
+static void wcd_clsh_set_gain_path(struct wcd_clsh_ctrl *ctrl, int mode)
+{
+	struct snd_soc_component *comp = ctrl->comp;
+	int val = 0;
+
+	switch (mode) {
+	case CLS_H_NORMAL:
+	case CLS_AB:
+		val = WCD9XXX_HPH_CONST_SEL_BYPASS;
+		break;
+	case CLS_H_HIFI:
+		val = WCD9XXX_HPH_CONST_SEL_HQ_PATH;
+		break;
+	case CLS_H_LP:
+		val = WCD9XXX_HPH_CONST_SEL_LP_PATH;
+		break;
+	}
+
+	snd_soc_component_update_bits(comp, WCD9XXX_HPH_L_EN,
+					WCD9XXX_HPH_CONST_SEL_L_MASK,
+					val);
+
+	snd_soc_component_update_bits(comp, WCD9XXX_HPH_R_EN,
+					WCD9XXX_HPH_CONST_SEL_L_MASK,
+					val);
+}
+
+static void wcd_clsh_v2_set_hph_mode(struct snd_soc_component *comp, int mode)
+{
+	int val = 0, gain = 0, res_val;
+	int ipeak = WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_50MA;
+
+	res_val = WCD9XXX_CLASSH_CTRL_VCL_VREF_FILT_R_0KOHM;
+	switch (mode) {
+	case CLS_H_NORMAL:
+		res_val = WCD9XXX_CLASSH_CTRL_VCL_VREF_FILT_R_50KOHM;
+		val = WCD9XXX_A_ANA_HPH_PWR_LEVEL_NORMAL;
+		gain = DAC_GAIN_0DB;
+		ipeak = WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_50MA;
+		break;
+	case CLS_AB:
+		val = WCD9XXX_A_ANA_HPH_PWR_LEVEL_NORMAL;
+		gain = DAC_GAIN_0DB;
+		ipeak = WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_50MA;
+		break;
+	case CLS_H_HIFI:
+		val = WCD9XXX_A_ANA_HPH_PWR_LEVEL_UHQA;
+		gain = DAC_GAIN_M0P2DB;
+		ipeak = WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_50MA;
+		break;
+	case CLS_H_LP:
+		val = WCD9XXX_A_ANA_HPH_PWR_LEVEL_LP;
+		ipeak = WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_30MA;
+		break;
+	}
+
+	snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_HPH,
+					WCD9XXX_A_ANA_HPH_PWR_LEVEL_MASK, val);
+	snd_soc_component_update_bits(comp, WCD9XXX_CLASSH_CTRL_VCL_2,
+				WCD9XXX_CLASSH_CTRL_VCL_2_VREF_FILT_1_MASK,
+				res_val);
+	if (mode != CLS_H_LP)
+		snd_soc_component_update_bits(comp,
+					WCD9XXX_HPH_REFBUFF_UHQA_CTL,
+					WCD9XXX_HPH_REFBUFF_UHQA_GAIN_MASK,
+					gain);
+	snd_soc_component_update_bits(comp, WCD9XXX_CLASSH_CTRL_CCL_1,
+				WCD9XXX_CLASSH_CTRL_CCL_1_DELTA_IPEAK_MASK,
+				ipeak);
+}
+
+static void wcd_clsh_v3_set_hph_mode(struct snd_soc_component *component,
+				  int mode)
+{
+	u8 val;
+
+	switch (mode) {
+	case CLS_H_NORMAL:
+		val = 0x00;
+		break;
+	case CLS_AB:
+	case CLS_H_ULP:
+		val = 0x0C;
+		break;
+	case CLS_AB_HIFI:
+	case CLS_H_HIFI:
+		val = 0x08;
+		break;
+	case CLS_H_LP:
+	case CLS_H_LOHIFI:
+	case CLS_AB_LP:
+	case CLS_AB_LOHIFI:
+		val = 0x04;
+		break;
+	default:
+		dev_err(component->dev, "%s:Invalid mode %d\n", __func__, mode);
+		return;
+	}
+
+	snd_soc_component_update_bits(component, WCD9XXX_ANA_HPH, 0x0C, val);
+}
+
+void wcd_clsh_set_hph_mode(struct wcd_clsh_ctrl *ctrl, int mode)
+{
+	struct snd_soc_component *comp = ctrl->comp;
+
+	if (ctrl->codec_version >= WCD937X)
+		wcd_clsh_v3_set_hph_mode(comp, mode);
+	else
+		wcd_clsh_v2_set_hph_mode(comp, mode);
+
+}
+
+static void wcd_clsh_set_flyback_current(struct snd_soc_component *comp,
+					 int mode)
+{
+
+	snd_soc_component_update_bits(comp, WCD9XXX_RX_BIAS_FLYB_BUFF,
+				WCD9XXX_RX_BIAS_FLYB_VPOS_5_UA_MASK, 0x0A);
+	snd_soc_component_update_bits(comp, WCD9XXX_RX_BIAS_FLYB_BUFF,
+				WCD9XXX_RX_BIAS_FLYB_VNEG_5_UA_MASK, 0x0A);
+	/* Sleep needed to avoid click and pop as per HW requirement */
+	usleep_range(100, 110);
+}
+
+static void wcd_clsh_set_buck_regulator_mode(struct snd_soc_component *comp,
+					     int mode)
+{
+	if (mode == CLS_AB)
+		snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_RX_SUPPLIES,
+					WCD9XXX_A_ANA_RX_REGULATOR_MODE_MASK,
+					WCD9XXX_A_ANA_RX_REGULATOR_MODE_CLS_AB);
+	else
+		snd_soc_component_update_bits(comp, WCD9XXX_A_ANA_RX_SUPPLIES,
+					WCD9XXX_A_ANA_RX_REGULATOR_MODE_MASK,
+					WCD9XXX_A_ANA_RX_REGULATOR_MODE_CLS_H);
+}
+
+static void wcd_clsh_v3_set_buck_regulator_mode(struct snd_soc_component *component,
+						int mode)
+{
+	snd_soc_component_update_bits(component, WCD9XXX_ANA_RX_SUPPLIES,
+			    0x02, 0x00);
+}
+
+static void wcd_clsh_v3_set_flyback_mode(struct snd_soc_component *component,
+						int mode)
+{
+	if (mode == CLS_H_HIFI || mode == CLS_H_LOHIFI ||
+	    mode == CLS_AB_HIFI || mode == CLS_AB_LOHIFI) {
+		snd_soc_component_update_bits(component,
+				WCD9XXX_ANA_RX_SUPPLIES,
+				0x04, 0x04);
+		snd_soc_component_update_bits(component,
+				WCD9XXX_FLYBACK_VNEG_CTRL_4,
+				0xF0, 0x80);
+	} else {
+		snd_soc_component_update_bits(component,
+				WCD9XXX_ANA_RX_SUPPLIES,
+				0x04, 0x00); /* set to Default */
+		snd_soc_component_update_bits(component,
+				WCD9XXX_FLYBACK_VNEG_CTRL_4,
+				0xF0, 0x70);
+	}
+}
+
+static void wcd_clsh_v3_force_iq_ctl(struct snd_soc_component *component,
+					 int mode, bool enable)
+{
+	if (enable) {
+		snd_soc_component_update_bits(component,
+				WCD9XXX_FLYBACK_VNEGDAC_CTRL_2,
+				0xE0, 0xA0);
+		/* 100usec delay is needed as per HW requirement */
+		usleep_range(100, 110);
+		snd_soc_component_update_bits(component,
+				WCD9XXX_CLASSH_MODE_3,
+				0x02, 0x02);
+		snd_soc_component_update_bits(component,
+				WCD9XXX_CLASSH_MODE_2,
+				0xFF, 0x1C);
+		if (mode == CLS_H_LOHIFI || mode == CLS_AB_LOHIFI) {
+			snd_soc_component_update_bits(component,
+					WCD9XXX_HPH_NEW_INT_PA_MISC2,
+					0x20, 0x20);
+			snd_soc_component_update_bits(component,
+					WCD9XXX_RX_BIAS_HPH_LOWPOWER,
+					0xF0, 0xC0);
+			snd_soc_component_update_bits(component,
+					WCD9XXX_HPH_PA_CTL1,
+					0x0E, 0x02);
+		}
+	} else {
+		snd_soc_component_update_bits(component,
+				WCD9XXX_HPH_NEW_INT_PA_MISC2,
+				0x20, 0x00);
+		snd_soc_component_update_bits(component,
+				WCD9XXX_RX_BIAS_HPH_LOWPOWER,
+				0xF0, 0x80);
+		snd_soc_component_update_bits(component,
+				WCD9XXX_HPH_PA_CTL1,
+				0x0E, 0x06);
+	}
+}
+
+static void wcd_clsh_v3_flyback_ctrl(struct snd_soc_component *component,
+				  struct wcd_clsh_ctrl *ctrl,
+				  int mode,
+				  bool enable)
+{
+	/* enable/disable flyback */
+	if ((enable && (++ctrl->flyback_users == 1)) ||
+	   (!enable && (--ctrl->flyback_users == 0))) {
+		snd_soc_component_update_bits(component,
+				WCD9XXX_FLYBACK_VNEG_CTRL_1,
+				0xE0, 0xE0);
+		snd_soc_component_update_bits(component,
+				WCD9XXX_ANA_RX_SUPPLIES,
+				(1 << 6), (enable << 6));
+		/*
+		 * 100us sleep is required after flyback enable/disable
+		 * as per HW requirement
+		 */
+		usleep_range(100, 110);
+		snd_soc_component_update_bits(component,
+				WCD9XXX_FLYBACK_VNEGDAC_CTRL_2,
+				0xE0, 0xE0);
+		/* 500usec delay is needed as per HW requirement */
+		usleep_range(500, 500 + WCD_USLEEP_RANGE);
+	}
+}
+
+static void wcd_clsh_v3_set_flyback_current(struct snd_soc_component *component,
+				int mode)
+{
+	snd_soc_component_update_bits(component, WCD9XXX_V3_RX_BIAS_FLYB_BUFF,
+				0x0F, 0x0A);
+	snd_soc_component_update_bits(component, WCD9XXX_V3_RX_BIAS_FLYB_BUFF,
+				0xF0, 0xA0);
+	/* Sleep needed to avoid click and pop as per HW requirement */
+	usleep_range(100, 110);
+}
+
+static void wcd_clsh_v3_state_aux(struct wcd_clsh_ctrl *ctrl, int req_state,
+			      bool is_enable, int mode)
+{
+	struct snd_soc_component *component = ctrl->comp;
+
+	if (is_enable) {
+		wcd_clsh_v3_set_buck_mode(component, mode);
+		wcd_clsh_v3_set_flyback_mode(component, mode);
+		wcd_clsh_v3_flyback_ctrl(component, ctrl, mode, true);
+		wcd_clsh_v3_set_flyback_current(component, mode);
+		wcd_clsh_v3_buck_ctrl(component, ctrl, mode, true);
+	} else {
+		wcd_clsh_v3_buck_ctrl(component, ctrl, mode, false);
+		wcd_clsh_v3_flyback_ctrl(component, ctrl, mode, false);
+		wcd_clsh_v3_set_flyback_mode(component, CLS_H_NORMAL);
+		wcd_clsh_v3_set_buck_mode(component, CLS_H_NORMAL);
+	}
+}
+
+static void wcd_clsh_state_lo(struct wcd_clsh_ctrl *ctrl, int req_state,
+			      bool is_enable, int mode)
+{
+	struct snd_soc_component *comp = ctrl->comp;
+
+	if (mode != CLS_AB) {
+		dev_err(comp->dev, "%s: LO cannot be in this mode: %d\n",
+			__func__, mode);
+		return;
+	}
+
+	if (is_enable) {
+		wcd_clsh_set_buck_regulator_mode(comp, mode);
+		wcd_clsh_set_buck_mode(comp, mode);
+		wcd_clsh_set_flyback_mode(comp, mode);
+		wcd_clsh_flyback_ctrl(ctrl, mode, true);
+		wcd_clsh_set_flyback_current(comp, mode);
+		wcd_clsh_buck_ctrl(ctrl, mode, true);
+	} else {
+		wcd_clsh_buck_ctrl(ctrl, mode, false);
+		wcd_clsh_flyback_ctrl(ctrl, mode, false);
+		wcd_clsh_set_flyback_mode(comp, CLS_H_NORMAL);
+		wcd_clsh_set_buck_mode(comp, CLS_H_NORMAL);
+		wcd_clsh_set_buck_regulator_mode(comp, CLS_H_NORMAL);
+	}
+}
+
+static void wcd_clsh_v3_state_hph_r(struct wcd_clsh_ctrl *ctrl, int req_state,
+				 bool is_enable, int mode)
+{
+	struct snd_soc_component *component = ctrl->comp;
+
+	if (mode == CLS_H_NORMAL) {
+		dev_dbg(component->dev, "%s: Normal mode not applicable for hph_r\n",
+			__func__);
+		return;
+	}
+
+	if (is_enable) {
+		wcd_clsh_v3_set_buck_regulator_mode(component, mode);
+		wcd_clsh_v3_set_flyback_mode(component, mode);
+		wcd_clsh_v3_force_iq_ctl(component, mode, true);
+		wcd_clsh_v3_flyback_ctrl(component, ctrl, mode, true);
+		wcd_clsh_v3_set_flyback_current(component, mode);
+		wcd_clsh_v3_set_buck_mode(component, mode);
+		wcd_clsh_v3_buck_ctrl(component, ctrl, mode, true);
+		wcd_clsh_v3_set_hph_mode(component, mode);
+	} else {
+		wcd_clsh_v3_set_hph_mode(component, CLS_H_NORMAL);
+
+		/* buck and flyback set to default mode and disable */
+		wcd_clsh_v3_flyback_ctrl(component, ctrl, CLS_H_NORMAL, false);
+		wcd_clsh_v3_buck_ctrl(component, ctrl, CLS_H_NORMAL, false);
+		wcd_clsh_v3_force_iq_ctl(component, CLS_H_NORMAL, false);
+		wcd_clsh_v3_set_flyback_mode(component, CLS_H_NORMAL);
+		wcd_clsh_v3_set_buck_mode(component, CLS_H_NORMAL);
+	}
+}
+
+static void wcd_clsh_state_hph_r(struct wcd_clsh_ctrl *ctrl, int req_state,
+				 bool is_enable, int mode)
+{
+	struct snd_soc_component *comp = ctrl->comp;
+
+	if (mode == CLS_H_NORMAL) {
+		dev_err(comp->dev, "%s: Normal mode not applicable for hph_r\n",
+			__func__);
+		return;
+	}
+
+	if (is_enable) {
+		if (mode != CLS_AB) {
+			wcd_enable_clsh_block(ctrl, true);
+			/*
+			 * These K1 values depend on the Headphone Impedance
+			 * For now it is assumed to be 16 ohm
+			 */
+			snd_soc_component_update_bits(comp,
+					WCD9XXX_A_CDC_CLSH_K1_MSB,
+					WCD9XXX_A_CDC_CLSH_K1_MSB_COEF_MASK,
+					0x00);
+			snd_soc_component_update_bits(comp,
+					WCD9XXX_A_CDC_CLSH_K1_LSB,
+					WCD9XXX_A_CDC_CLSH_K1_LSB_COEF_MASK,
+					0xC0);
+			snd_soc_component_update_bits(comp,
+					    WCD9XXX_A_CDC_RX2_RX_PATH_CFG0,
+					    WCD9XXX_A_CDC_RX_PATH_CLSH_EN_MASK,
+					    WCD9XXX_A_CDC_RX_PATH_CLSH_ENABLE);
+		}
+		wcd_clsh_set_buck_regulator_mode(comp, mode);
+		wcd_clsh_set_flyback_mode(comp, mode);
+		wcd_clsh_flyback_ctrl(ctrl, mode, true);
+		wcd_clsh_set_flyback_current(comp, mode);
+		wcd_clsh_set_buck_mode(comp, mode);
+		wcd_clsh_buck_ctrl(ctrl, mode, true);
+		wcd_clsh_v2_set_hph_mode(comp, mode);
+		wcd_clsh_set_gain_path(ctrl, mode);
+	} else {
+		wcd_clsh_v2_set_hph_mode(comp, CLS_H_NORMAL);
+
+		if (mode != CLS_AB) {
+			snd_soc_component_update_bits(comp,
+					    WCD9XXX_A_CDC_RX2_RX_PATH_CFG0,
+					    WCD9XXX_A_CDC_RX_PATH_CLSH_EN_MASK,
+					    WCD9XXX_A_CDC_RX_PATH_CLSH_DISABLE);
+			wcd_enable_clsh_block(ctrl, false);
+		}
+		/* buck and flyback set to default mode and disable */
+		wcd_clsh_buck_ctrl(ctrl, CLS_H_NORMAL, false);
+		wcd_clsh_flyback_ctrl(ctrl, CLS_H_NORMAL, false);
+		wcd_clsh_set_flyback_mode(comp, CLS_H_NORMAL);
+		wcd_clsh_set_buck_mode(comp, CLS_H_NORMAL);
+		wcd_clsh_set_buck_regulator_mode(comp, CLS_H_NORMAL);
+	}
+}
+
+static void wcd_clsh_v3_state_hph_l(struct wcd_clsh_ctrl *ctrl, int req_state,
+				 bool is_enable, int mode)
+{
+	struct snd_soc_component *component = ctrl->comp;
+
+	if (mode == CLS_H_NORMAL) {
+		dev_dbg(component->dev, "%s: Normal mode not applicable for hph_l\n",
+			__func__);
+		return;
+	}
+
+	if (is_enable) {
+		wcd_clsh_v3_set_buck_regulator_mode(component, mode);
+		wcd_clsh_v3_set_flyback_mode(component, mode);
+		wcd_clsh_v3_force_iq_ctl(component, mode, true);
+		wcd_clsh_v3_flyback_ctrl(component, ctrl, mode, true);
+		wcd_clsh_v3_set_flyback_current(component, mode);
+		wcd_clsh_v3_set_buck_mode(component, mode);
+		wcd_clsh_v3_buck_ctrl(component, ctrl, mode, true);
+		wcd_clsh_v3_set_hph_mode(component, mode);
+	} else {
+		wcd_clsh_v3_set_hph_mode(component, CLS_H_NORMAL);
+
+		/* set buck and flyback to Default Mode */
+		wcd_clsh_v3_flyback_ctrl(component, ctrl, CLS_H_NORMAL, false);
+		wcd_clsh_v3_buck_ctrl(component, ctrl, CLS_H_NORMAL, false);
+		wcd_clsh_v3_force_iq_ctl(component, CLS_H_NORMAL, false);
+		wcd_clsh_v3_set_flyback_mode(component, CLS_H_NORMAL);
+		wcd_clsh_v3_set_buck_mode(component, CLS_H_NORMAL);
+	}
+}
+
+static void wcd_clsh_state_hph_l(struct wcd_clsh_ctrl *ctrl, int req_state,
+				 bool is_enable, int mode)
+{
+	struct snd_soc_component *comp = ctrl->comp;
+
+	if (mode == CLS_H_NORMAL) {
+		dev_err(comp->dev, "%s: Normal mode not applicable for hph_l\n",
+			__func__);
+		return;
+	}
+
+	if (is_enable) {
+		if (mode != CLS_AB) {
+			wcd_enable_clsh_block(ctrl, true);
+			/*
+			 * These K1 values depend on the Headphone Impedance
+			 * For now it is assumed to be 16 ohm
+			 */
+			snd_soc_component_update_bits(comp,
+					WCD9XXX_A_CDC_CLSH_K1_MSB,
+					WCD9XXX_A_CDC_CLSH_K1_MSB_COEF_MASK,
+					0x00);
+			snd_soc_component_update_bits(comp,
+					WCD9XXX_A_CDC_CLSH_K1_LSB,
+					WCD9XXX_A_CDC_CLSH_K1_LSB_COEF_MASK,
+					0xC0);
+			snd_soc_component_update_bits(comp,
+					    WCD9XXX_A_CDC_RX1_RX_PATH_CFG0,
+					    WCD9XXX_A_CDC_RX_PATH_CLSH_EN_MASK,
+					    WCD9XXX_A_CDC_RX_PATH_CLSH_ENABLE);
+		}
+		wcd_clsh_set_buck_regulator_mode(comp, mode);
+		wcd_clsh_set_flyback_mode(comp, mode);
+		wcd_clsh_flyback_ctrl(ctrl, mode, true);
+		wcd_clsh_set_flyback_current(comp, mode);
+		wcd_clsh_set_buck_mode(comp, mode);
+		wcd_clsh_buck_ctrl(ctrl, mode, true);
+		wcd_clsh_v2_set_hph_mode(comp, mode);
+		wcd_clsh_set_gain_path(ctrl, mode);
+	} else {
+		wcd_clsh_v2_set_hph_mode(comp, CLS_H_NORMAL);
+
+		if (mode != CLS_AB) {
+			snd_soc_component_update_bits(comp,
+					    WCD9XXX_A_CDC_RX1_RX_PATH_CFG0,
+					    WCD9XXX_A_CDC_RX_PATH_CLSH_EN_MASK,
+					    WCD9XXX_A_CDC_RX_PATH_CLSH_DISABLE);
+			wcd_enable_clsh_block(ctrl, false);
+		}
+		/* set buck and flyback to Default Mode */
+		wcd_clsh_buck_ctrl(ctrl, CLS_H_NORMAL, false);
+		wcd_clsh_flyback_ctrl(ctrl, CLS_H_NORMAL, false);
+		wcd_clsh_set_flyback_mode(comp, CLS_H_NORMAL);
+		wcd_clsh_set_buck_mode(comp, CLS_H_NORMAL);
+		wcd_clsh_set_buck_regulator_mode(comp, CLS_H_NORMAL);
+	}
+}
+
+static void wcd_clsh_v3_state_ear(struct wcd_clsh_ctrl *ctrl, int req_state,
+			       bool is_enable, int mode)
+{
+	struct snd_soc_component *component = ctrl->comp;
+
+	if (is_enable) {
+		wcd_clsh_v3_set_buck_regulator_mode(component, mode);
+		wcd_clsh_v3_set_flyback_mode(component, mode);
+		wcd_clsh_v3_force_iq_ctl(component, mode, true);
+		wcd_clsh_v3_flyback_ctrl(component, ctrl, mode, true);
+		wcd_clsh_v3_set_flyback_current(component, mode);
+		wcd_clsh_v3_set_buck_mode(component, mode);
+		wcd_clsh_v3_buck_ctrl(component, ctrl, mode, true);
+		wcd_clsh_v3_set_hph_mode(component, mode);
+	} else {
+		wcd_clsh_v3_set_hph_mode(component, CLS_H_NORMAL);
+
+		/* set buck and flyback to Default Mode */
+		wcd_clsh_v3_flyback_ctrl(component, ctrl, CLS_H_NORMAL, false);
+		wcd_clsh_v3_buck_ctrl(component, ctrl, CLS_H_NORMAL, false);
+		wcd_clsh_v3_force_iq_ctl(component, CLS_H_NORMAL, false);
+		wcd_clsh_v3_set_flyback_mode(component, CLS_H_NORMAL);
+		wcd_clsh_v3_set_buck_mode(component, CLS_H_NORMAL);
+	}
+}
+
+static void wcd_clsh_state_ear(struct wcd_clsh_ctrl *ctrl, int req_state,
+			       bool is_enable, int mode)
+{
+	struct snd_soc_component *comp = ctrl->comp;
+
+	if (mode != CLS_H_NORMAL) {
+		dev_err(comp->dev, "%s: mode: %d cannot be used for EAR\n",
+			__func__, mode);
+		return;
+	}
+
+	if (is_enable) {
+		wcd_enable_clsh_block(ctrl, true);
+		snd_soc_component_update_bits(comp,
+					WCD9XXX_A_CDC_RX0_RX_PATH_CFG0,
+					WCD9XXX_A_CDC_RX_PATH_CLSH_EN_MASK,
+					WCD9XXX_A_CDC_RX_PATH_CLSH_ENABLE);
+		wcd_clsh_set_buck_mode(comp, mode);
+		wcd_clsh_set_flyback_mode(comp, mode);
+		wcd_clsh_flyback_ctrl(ctrl, mode, true);
+		wcd_clsh_set_flyback_current(comp, mode);
+		wcd_clsh_buck_ctrl(ctrl, mode, true);
+	} else {
+		snd_soc_component_update_bits(comp,
+					WCD9XXX_A_CDC_RX0_RX_PATH_CFG0,
+					WCD9XXX_A_CDC_RX_PATH_CLSH_EN_MASK,
+					WCD9XXX_A_CDC_RX_PATH_CLSH_DISABLE);
+		wcd_enable_clsh_block(ctrl, false);
+		wcd_clsh_buck_ctrl(ctrl, mode, false);
+		wcd_clsh_flyback_ctrl(ctrl, mode, false);
+		wcd_clsh_set_flyback_mode(comp, CLS_H_NORMAL);
+		wcd_clsh_set_buck_mode(comp, CLS_H_NORMAL);
+	}
+}
+
+static int _wcd_clsh_ctrl_set_state(struct wcd_clsh_ctrl *ctrl, int req_state,
+				    bool is_enable, int mode)
+{
+	switch (req_state) {
+	case WCD_CLSH_STATE_EAR:
+		if (ctrl->codec_version >= WCD937X)
+			wcd_clsh_v3_state_ear(ctrl, req_state, is_enable, mode);
+		else
+			wcd_clsh_state_ear(ctrl, req_state, is_enable, mode);
+		break;
+	case WCD_CLSH_STATE_HPHL:
+		if (ctrl->codec_version >= WCD937X)
+			wcd_clsh_v3_state_hph_l(ctrl, req_state, is_enable, mode);
+		else
+			wcd_clsh_state_hph_l(ctrl, req_state, is_enable, mode);
+		break;
+	case WCD_CLSH_STATE_HPHR:
+		if (ctrl->codec_version >= WCD937X)
+			wcd_clsh_v3_state_hph_r(ctrl, req_state, is_enable, mode);
+		else
+			wcd_clsh_state_hph_r(ctrl, req_state, is_enable, mode);
+		break;
+	case WCD_CLSH_STATE_LO:
+		if (ctrl->codec_version < WCD937X)
+			wcd_clsh_state_lo(ctrl, req_state, is_enable, mode);
+		break;
+	case WCD_CLSH_STATE_AUX:
+		if (ctrl->codec_version >= WCD937X)
+			wcd_clsh_v3_state_aux(ctrl, req_state, is_enable, mode);
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+/*
+ * Function: wcd_clsh_is_state_valid
+ * Params: state
+ * Description:
+ * Provides information on valid states of Class H configuration
+ */
+static bool wcd_clsh_is_state_valid(int state)
+{
+	switch (state) {
+	case WCD_CLSH_STATE_IDLE:
+	case WCD_CLSH_STATE_EAR:
+	case WCD_CLSH_STATE_HPHL:
+	case WCD_CLSH_STATE_HPHR:
+	case WCD_CLSH_STATE_LO:
+	case WCD_CLSH_STATE_AUX:
+		return true;
+	default:
+		return false;
+	};
+}
+
+/*
+ * Function: wcd_clsh_fsm
+ * Params: ctrl, req_state, req_type, clsh_event
+ * Description:
+ * This function handles PRE DAC and POST DAC conditions of different devices
+ * and updates class H configuration of different combination of devices
+ * based on validity of their states. ctrl will contain current
+ * class h state information
+ */
+int wcd_clsh_ctrl_set_state(struct wcd_clsh_ctrl *ctrl,
+			    enum wcd_clsh_event clsh_event,
+			    int nstate,
+			    enum wcd_clsh_mode mode)
+{
+	struct snd_soc_component *comp = ctrl->comp;
+
+	if (nstate == ctrl->state)
+		return 0;
+
+	if (!wcd_clsh_is_state_valid(nstate)) {
+		dev_err(comp->dev, "Class-H not a valid new state:\n");
+		return -EINVAL;
+	}
+
+	switch (clsh_event) {
+	case WCD_CLSH_EVENT_PRE_DAC:
+		_wcd_clsh_ctrl_set_state(ctrl, nstate, CLSH_REQ_ENABLE, mode);
+		break;
+	case WCD_CLSH_EVENT_POST_PA:
+		_wcd_clsh_ctrl_set_state(ctrl, nstate, CLSH_REQ_DISABLE, mode);
+		break;
+	}
+
+	ctrl->state = nstate;
+	ctrl->mode = mode;
+
+	return 0;
+}
+
+int wcd_clsh_ctrl_get_state(struct wcd_clsh_ctrl *ctrl)
+{
+	return ctrl->state;
+}
+
+struct wcd_clsh_ctrl *wcd_clsh_ctrl_alloc(struct snd_soc_component *comp,
+					  int version)
+{
+	struct wcd_clsh_ctrl *ctrl;
+
+	ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
+	if (!ctrl)
+		return ERR_PTR(-ENOMEM);
+
+	ctrl->state = WCD_CLSH_STATE_IDLE;
+	ctrl->comp = comp;
+	ctrl->codec_version = version;
+
+	return ctrl;
+}
+
+void wcd_clsh_ctrl_free(struct wcd_clsh_ctrl *ctrl)
+{
+	kfree(ctrl);
+}