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, 798 insertions, 0 deletions

diff --git a/drivers/mfd/madera-core.c b/drivers/mfd/madera-core.c
new file mode 100644
index 000000000..bdbd5bfc9
--- /dev/null
+++ b/drivers/mfd/madera-core.c
@@ -0,0 +1,798 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Core MFD support for Cirrus Logic Madera codecs
+ *
+ * Copyright (C) 2015-2018 Cirrus Logic
+ */
+
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/notifier.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+
+#include <linux/mfd/madera/core.h>
+#include <linux/mfd/madera/registers.h>
+
+#include "madera.h"
+
+#define CS47L15_SILICON_ID	0x6370
+#define CS47L35_SILICON_ID	0x6360
+#define CS47L85_SILICON_ID	0x6338
+#define CS47L90_SILICON_ID	0x6364
+#define CS47L92_SILICON_ID	0x6371
+
+#define MADERA_32KZ_MCLK2	1
+
+#define MADERA_RESET_MIN_US	2000
+#define MADERA_RESET_MAX_US	3000
+
+#define ERRATA_DCVDD_MIN_US	10000
+#define ERRATA_DCVDD_MAX_US	15000
+
+static const char * const madera_core_supplies[] = {
+	"AVDD",
+	"DBVDD1",
+};
+
+static const struct mfd_cell madera_ldo1_devs[] = {
+	{
+		.name = "madera-ldo1",
+		.level = MFD_DEP_LEVEL_HIGH,
+	},
+};
+
+static const char * const cs47l15_supplies[] = {
+	"MICVDD",
+	"CPVDD1",
+	"SPKVDD",
+};
+
+static const struct mfd_cell cs47l15_devs[] = {
+	{ .name = "madera-pinctrl", },
+	{ .name = "madera-irq", },
+	{ .name = "madera-gpio", },
+	{
+		.name = "madera-extcon",
+		.parent_supplies = cs47l15_supplies,
+		.num_parent_supplies = 1, /* We only need MICVDD */
+	},
+	{
+		.name = "cs47l15-codec",
+		.parent_supplies = cs47l15_supplies,
+		.num_parent_supplies = ARRAY_SIZE(cs47l15_supplies),
+	},
+};
+
+static const char * const cs47l35_supplies[] = {
+	"MICVDD",
+	"DBVDD2",
+	"CPVDD1",
+	"CPVDD2",
+	"SPKVDD",
+};
+
+static const struct mfd_cell cs47l35_devs[] = {
+	{ .name = "madera-pinctrl", },
+	{ .name = "madera-irq", },
+	{ .name = "madera-micsupp", },
+	{ .name = "madera-gpio", },
+	{
+		.name = "madera-extcon",
+		.parent_supplies = cs47l35_supplies,
+		.num_parent_supplies = 1, /* We only need MICVDD */
+	},
+	{
+		.name = "cs47l35-codec",
+		.parent_supplies = cs47l35_supplies,
+		.num_parent_supplies = ARRAY_SIZE(cs47l35_supplies),
+	},
+};
+
+static const char * const cs47l85_supplies[] = {
+	"MICVDD",
+	"DBVDD2",
+	"DBVDD3",
+	"DBVDD4",
+	"CPVDD1",
+	"CPVDD2",
+	"SPKVDDL",
+	"SPKVDDR",
+};
+
+static const struct mfd_cell cs47l85_devs[] = {
+	{ .name = "madera-pinctrl", },
+	{ .name = "madera-irq", },
+	{ .name = "madera-micsupp", },
+	{ .name = "madera-gpio", },
+	{
+		.name = "madera-extcon",
+		.parent_supplies = cs47l85_supplies,
+		.num_parent_supplies = 1, /* We only need MICVDD */
+	},
+	{
+		.name = "cs47l85-codec",
+		.parent_supplies = cs47l85_supplies,
+		.num_parent_supplies = ARRAY_SIZE(cs47l85_supplies),
+	},
+};
+
+static const char * const cs47l90_supplies[] = {
+	"MICVDD",
+	"DBVDD2",
+	"DBVDD3",
+	"DBVDD4",
+	"CPVDD1",
+	"CPVDD2",
+};
+
+static const struct mfd_cell cs47l90_devs[] = {
+	{ .name = "madera-pinctrl", },
+	{ .name = "madera-irq", },
+	{ .name = "madera-micsupp", },
+	{ .name = "madera-gpio", },
+	{
+		.name = "madera-extcon",
+		.parent_supplies = cs47l90_supplies,
+		.num_parent_supplies = 1, /* We only need MICVDD */
+	},
+	{
+		.name = "cs47l90-codec",
+		.parent_supplies = cs47l90_supplies,
+		.num_parent_supplies = ARRAY_SIZE(cs47l90_supplies),
+	},
+};
+
+static const char * const cs47l92_supplies[] = {
+	"MICVDD",
+	"CPVDD1",
+	"CPVDD2",
+};
+
+static const struct mfd_cell cs47l92_devs[] = {
+	{ .name = "madera-pinctrl", },
+	{ .name = "madera-irq", },
+	{ .name = "madera-micsupp", },
+	{ .name = "madera-gpio", },
+	{
+		.name = "madera-extcon",
+		.parent_supplies = cs47l92_supplies,
+		.num_parent_supplies = 1, /* We only need MICVDD */
+	},
+	{
+		.name = "cs47l92-codec",
+		.parent_supplies = cs47l92_supplies,
+		.num_parent_supplies = ARRAY_SIZE(cs47l92_supplies),
+	},
+};
+
+/* Used by madera-i2c and madera-spi drivers */
+const char *madera_name_from_type(enum madera_type type)
+{
+	switch (type) {
+	case CS47L15:
+		return "CS47L15";
+	case CS47L35:
+		return "CS47L35";
+	case CS47L85:
+		return "CS47L85";
+	case CS47L90:
+		return "CS47L90";
+	case CS47L91:
+		return "CS47L91";
+	case CS42L92:
+		return "CS42L92";
+	case CS47L92:
+		return "CS47L92";
+	case CS47L93:
+		return "CS47L93";
+	case WM1840:
+		return "WM1840";
+	default:
+		return "Unknown";
+	}
+}
+EXPORT_SYMBOL_GPL(madera_name_from_type);
+
+#define MADERA_BOOT_POLL_INTERVAL_USEC		5000
+#define MADERA_BOOT_POLL_TIMEOUT_USEC		25000
+
+static int madera_wait_for_boot_noack(struct madera *madera)
+{
+	ktime_t timeout;
+	unsigned int val = 0;
+	int ret = 0;
+
+	/*
+	 * We can't use an interrupt as we need to runtime resume to do so,
+	 * so we poll the status bit. This won't race with the interrupt
+	 * handler because it will be blocked on runtime resume.
+	 * The chip could NAK a read request while it is booting so ignore
+	 * errors from regmap_read.
+	 */
+	timeout = ktime_add_us(ktime_get(), MADERA_BOOT_POLL_TIMEOUT_USEC);
+	regmap_read(madera->regmap, MADERA_IRQ1_RAW_STATUS_1, &val);
+	while (!(val & MADERA_BOOT_DONE_STS1) &&
+	       !ktime_after(ktime_get(), timeout)) {
+		usleep_range(MADERA_BOOT_POLL_INTERVAL_USEC / 2,
+			     MADERA_BOOT_POLL_INTERVAL_USEC);
+		regmap_read(madera->regmap, MADERA_IRQ1_RAW_STATUS_1, &val);
+	}
+
+	if (!(val & MADERA_BOOT_DONE_STS1)) {
+		dev_err(madera->dev, "Polling BOOT_DONE_STS timed out\n");
+		ret = -ETIMEDOUT;
+	}
+
+	return ret;
+}
+
+static int madera_wait_for_boot(struct madera *madera)
+{
+	int ret = madera_wait_for_boot_noack(madera);
+
+	/*
+	 * BOOT_DONE defaults to unmasked on boot so we must ack it.
+	 * Do this even after a timeout to avoid interrupt storms.
+	 */
+	regmap_write(madera->regmap, MADERA_IRQ1_STATUS_1,
+		     MADERA_BOOT_DONE_EINT1);
+
+	pm_runtime_mark_last_busy(madera->dev);
+
+	return ret;
+}
+
+static int madera_soft_reset(struct madera *madera)
+{
+	int ret;
+
+	ret = regmap_write(madera->regmap, MADERA_SOFTWARE_RESET, 0);
+	if (ret != 0) {
+		dev_err(madera->dev, "Failed to soft reset device: %d\n", ret);
+		return ret;
+	}
+
+	/* Allow time for internal clocks to startup after reset */
+	usleep_range(MADERA_RESET_MIN_US, MADERA_RESET_MAX_US);
+
+	return 0;
+}
+
+static void madera_enable_hard_reset(struct madera *madera)
+{
+	/*
+	 * There are many existing out-of-tree users of these codecs that we
+	 * can't break so preserve the expected behaviour of setting the line
+	 * low to assert reset.
+	 */
+	gpiod_set_raw_value_cansleep(madera->pdata.reset, 0);
+}
+
+static void madera_disable_hard_reset(struct madera *madera)
+{
+	gpiod_set_raw_value_cansleep(madera->pdata.reset, 1);
+
+	usleep_range(MADERA_RESET_MIN_US, MADERA_RESET_MAX_US);
+}
+
+static int __maybe_unused madera_runtime_resume(struct device *dev)
+{
+	struct madera *madera = dev_get_drvdata(dev);
+	int ret;
+
+	dev_dbg(dev, "Leaving sleep mode\n");
+
+	if (!madera->reset_errata)
+		madera_enable_hard_reset(madera);
+
+	ret = regulator_enable(madera->dcvdd);
+	if (ret) {
+		dev_err(dev, "Failed to enable DCVDD: %d\n", ret);
+		return ret;
+	}
+
+	regcache_cache_only(madera->regmap, false);
+	regcache_cache_only(madera->regmap_32bit, false);
+
+	if (madera->reset_errata)
+		usleep_range(ERRATA_DCVDD_MIN_US, ERRATA_DCVDD_MAX_US);
+	else
+		madera_disable_hard_reset(madera);
+
+	if (!madera->pdata.reset || madera->reset_errata) {
+		ret = madera_wait_for_boot(madera);
+		if (ret)
+			goto err;
+
+		ret = madera_soft_reset(madera);
+		if (ret) {
+			dev_err(dev, "Failed to reset: %d\n", ret);
+			goto err;
+		}
+	}
+
+	ret = madera_wait_for_boot(madera);
+	if (ret)
+		goto err;
+
+	ret = regcache_sync(madera->regmap);
+	if (ret) {
+		dev_err(dev, "Failed to restore 16-bit register cache\n");
+		goto err;
+	}
+
+	ret = regcache_sync(madera->regmap_32bit);
+	if (ret) {
+		dev_err(dev, "Failed to restore 32-bit register cache\n");
+		goto err;
+	}
+
+	return 0;
+
+err:
+	regcache_cache_only(madera->regmap_32bit, true);
+	regcache_cache_only(madera->regmap, true);
+	regulator_disable(madera->dcvdd);
+
+	return ret;
+}
+
+static int __maybe_unused madera_runtime_suspend(struct device *dev)
+{
+	struct madera *madera = dev_get_drvdata(dev);
+
+	dev_dbg(madera->dev, "Entering sleep mode\n");
+
+	regcache_cache_only(madera->regmap, true);
+	regcache_mark_dirty(madera->regmap);
+	regcache_cache_only(madera->regmap_32bit, true);
+	regcache_mark_dirty(madera->regmap_32bit);
+
+	regulator_disable(madera->dcvdd);
+
+	return 0;
+}
+
+const struct dev_pm_ops madera_pm_ops = {
+	SET_RUNTIME_PM_OPS(madera_runtime_suspend,
+			   madera_runtime_resume,
+			   NULL)
+};
+EXPORT_SYMBOL_GPL(madera_pm_ops);
+
+const struct of_device_id madera_of_match[] = {
+	{ .compatible = "cirrus,cs47l15", .data = (void *)CS47L15 },
+	{ .compatible = "cirrus,cs47l35", .data = (void *)CS47L35 },
+	{ .compatible = "cirrus,cs47l85", .data = (void *)CS47L85 },
+	{ .compatible = "cirrus,cs47l90", .data = (void *)CS47L90 },
+	{ .compatible = "cirrus,cs47l91", .data = (void *)CS47L91 },
+	{ .compatible = "cirrus,cs42l92", .data = (void *)CS42L92 },
+	{ .compatible = "cirrus,cs47l92", .data = (void *)CS47L92 },
+	{ .compatible = "cirrus,cs47l93", .data = (void *)CS47L93 },
+	{ .compatible = "cirrus,wm1840", .data = (void *)WM1840 },
+	{}
+};
+MODULE_DEVICE_TABLE(of, madera_of_match);
+EXPORT_SYMBOL_GPL(madera_of_match);
+
+static int madera_get_reset_gpio(struct madera *madera)
+{
+	struct gpio_desc *reset;
+
+	if (madera->pdata.reset)
+		return 0;
+
+	reset = devm_gpiod_get_optional(madera->dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(reset))
+		return dev_err_probe(madera->dev, PTR_ERR(reset),
+				"Failed to request /RESET");
+
+	/*
+	 * A hard reset is needed for full reset of the chip. We allow running
+	 * without hard reset only because it can be useful for early
+	 * prototyping and some debugging, but we need to warn it's not ideal.
+	 */
+	if (!reset)
+		dev_warn(madera->dev,
+			 "Running without reset GPIO is not recommended\n");
+
+	madera->pdata.reset = reset;
+
+	return 0;
+}
+
+static void madera_set_micbias_info(struct madera *madera)
+{
+	/*
+	 * num_childbias is an array because future codecs can have different
+	 * childbiases for each micbias. Unspecified values default to 0.
+	 */
+	switch (madera->type) {
+	case CS47L15:
+		madera->num_micbias = 1;
+		madera->num_childbias[0] = 3;
+		return;
+	case CS47L35:
+		madera->num_micbias = 2;
+		madera->num_childbias[0] = 2;
+		madera->num_childbias[1] = 2;
+		return;
+	case CS47L85:
+	case WM1840:
+		madera->num_micbias = 4;
+		/* no child biases */
+		return;
+	case CS47L90:
+	case CS47L91:
+		madera->num_micbias = 2;
+		madera->num_childbias[0] = 4;
+		madera->num_childbias[1] = 4;
+		return;
+	case CS42L92:
+	case CS47L92:
+	case CS47L93:
+		madera->num_micbias = 2;
+		madera->num_childbias[0] = 4;
+		madera->num_childbias[1] = 2;
+		return;
+	default:
+		return;
+	}
+}
+
+int madera_dev_init(struct madera *madera)
+{
+	struct device *dev = madera->dev;
+	unsigned int hwid;
+	int (*patch_fn)(struct madera *) = NULL;
+	const struct mfd_cell *mfd_devs;
+	int n_devs = 0;
+	int i, ret;
+
+	dev_set_drvdata(madera->dev, madera);
+	BLOCKING_INIT_NOTIFIER_HEAD(&madera->notifier);
+	mutex_init(&madera->dapm_ptr_lock);
+
+	madera_set_micbias_info(madera);
+
+	/*
+	 * We need writable hw config info that all children can share.
+	 * Simplest to take one shared copy of pdata struct.
+	 */
+	if (dev_get_platdata(madera->dev)) {
+		memcpy(&madera->pdata, dev_get_platdata(madera->dev),
+		       sizeof(madera->pdata));
+	}
+
+	madera->mclk[MADERA_MCLK1].id = "mclk1";
+	madera->mclk[MADERA_MCLK2].id = "mclk2";
+	madera->mclk[MADERA_MCLK3].id = "mclk3";
+
+	ret = devm_clk_bulk_get_optional(madera->dev, ARRAY_SIZE(madera->mclk),
+					 madera->mclk);
+	if (ret) {
+		dev_err(madera->dev, "Failed to get clocks: %d\n", ret);
+		return ret;
+	}
+
+	/* Not using devm_clk_get to prevent breakage of existing DTs */
+	if (!madera->mclk[MADERA_MCLK2].clk)
+		dev_warn(madera->dev, "Missing MCLK2, requires 32kHz clock\n");
+
+	ret = madera_get_reset_gpio(madera);
+	if (ret)
+		return ret;
+
+	regcache_cache_only(madera->regmap, true);
+	regcache_cache_only(madera->regmap_32bit, true);
+
+	for (i = 0; i < ARRAY_SIZE(madera_core_supplies); i++)
+		madera->core_supplies[i].supply = madera_core_supplies[i];
+
+	madera->num_core_supplies = ARRAY_SIZE(madera_core_supplies);
+
+	/*
+	 * On some codecs DCVDD could be supplied by the internal LDO1.
+	 * For those we must add the LDO1 driver before requesting DCVDD
+	 * No devm_ because we need to control shutdown order of children.
+	 */
+	switch (madera->type) {
+	case CS47L15:
+		madera->reset_errata = true;
+		break;
+	case CS47L35:
+	case CS47L90:
+	case CS47L91:
+	case CS42L92:
+	case CS47L92:
+	case CS47L93:
+		break;
+	case CS47L85:
+	case WM1840:
+		ret = mfd_add_devices(madera->dev, PLATFORM_DEVID_NONE,
+				      madera_ldo1_devs,
+				      ARRAY_SIZE(madera_ldo1_devs),
+				      NULL, 0, NULL);
+		if (ret) {
+			dev_err(dev, "Failed to add LDO1 child: %d\n", ret);
+			return ret;
+		}
+		break;
+	default:
+		/* No point continuing if the type is unknown */
+		dev_err(madera->dev, "Unknown device type %d\n", madera->type);
+		return -ENODEV;
+	}
+
+	ret = devm_regulator_bulk_get(dev, madera->num_core_supplies,
+				      madera->core_supplies);
+	if (ret) {
+		dev_err(dev, "Failed to request core supplies: %d\n", ret);
+		goto err_devs;
+	}
+
+	/*
+	 * Don't use devres here. If the regulator is one of our children it
+	 * will already have been removed before devres cleanup on this mfd
+	 * driver tries to call put() on it. We need control of shutdown order.
+	 */
+	madera->dcvdd = regulator_get(madera->dev, "DCVDD");
+	if (IS_ERR(madera->dcvdd)) {
+		ret = PTR_ERR(madera->dcvdd);
+		dev_err(dev, "Failed to request DCVDD: %d\n", ret);
+		goto err_devs;
+	}
+
+	ret = regulator_bulk_enable(madera->num_core_supplies,
+				    madera->core_supplies);
+	if (ret) {
+		dev_err(dev, "Failed to enable core supplies: %d\n", ret);
+		goto err_dcvdd;
+	}
+
+	if (madera->reset_errata)
+		madera_disable_hard_reset(madera);
+
+	ret = regulator_enable(madera->dcvdd);
+	if (ret) {
+		dev_err(dev, "Failed to enable DCVDD: %d\n", ret);
+		goto err_enable;
+	}
+
+	if (madera->reset_errata)
+		usleep_range(ERRATA_DCVDD_MIN_US, ERRATA_DCVDD_MAX_US);
+	else
+		madera_disable_hard_reset(madera);
+
+	regcache_cache_only(madera->regmap, false);
+	regcache_cache_only(madera->regmap_32bit, false);
+
+	ret = madera_wait_for_boot_noack(madera);
+	if (ret) {
+		dev_err(madera->dev, "Device failed initial boot: %d\n", ret);
+		goto err_reset;
+	}
+
+	/*
+	 * Now we can power up and verify that this is a chip we know about
+	 * before we start doing any writes to its registers.
+	 */
+	ret = regmap_read(madera->regmap, MADERA_SOFTWARE_RESET, &hwid);
+	if (ret) {
+		dev_err(dev, "Failed to read ID register: %d\n", ret);
+		goto err_reset;
+	}
+
+	switch (hwid) {
+	case CS47L15_SILICON_ID:
+		if (IS_ENABLED(CONFIG_MFD_CS47L15)) {
+			switch (madera->type) {
+			case CS47L15:
+				patch_fn = &cs47l15_patch;
+				mfd_devs = cs47l15_devs;
+				n_devs = ARRAY_SIZE(cs47l15_devs);
+				break;
+			default:
+				break;
+			}
+		}
+		break;
+	case CS47L35_SILICON_ID:
+		if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
+			switch (madera->type) {
+			case CS47L35:
+				patch_fn = cs47l35_patch;
+				mfd_devs = cs47l35_devs;
+				n_devs = ARRAY_SIZE(cs47l35_devs);
+				break;
+			default:
+				break;
+			}
+		}
+		break;
+	case CS47L85_SILICON_ID:
+		if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
+			switch (madera->type) {
+			case CS47L85:
+			case WM1840:
+				patch_fn = cs47l85_patch;
+				mfd_devs = cs47l85_devs;
+				n_devs = ARRAY_SIZE(cs47l85_devs);
+				break;
+			default:
+				break;
+			}
+		}
+		break;
+	case CS47L90_SILICON_ID:
+		if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
+			switch (madera->type) {
+			case CS47L90:
+			case CS47L91:
+				patch_fn = cs47l90_patch;
+				mfd_devs = cs47l90_devs;
+				n_devs = ARRAY_SIZE(cs47l90_devs);
+				break;
+			default:
+				break;
+			}
+		}
+		break;
+	case CS47L92_SILICON_ID:
+		if (IS_ENABLED(CONFIG_MFD_CS47L92)) {
+			switch (madera->type) {
+			case CS42L92:
+			case CS47L92:
+			case CS47L93:
+				patch_fn = cs47l92_patch;
+				mfd_devs = cs47l92_devs;
+				n_devs = ARRAY_SIZE(cs47l92_devs);
+				break;
+			default:
+				break;
+			}
+		}
+		break;
+	default:
+		dev_err(madera->dev, "Unknown device ID: %x\n", hwid);
+		ret = -EINVAL;
+		goto err_reset;
+	}
+
+	if (!n_devs) {
+		dev_err(madera->dev, "Device ID 0x%x not a %s\n", hwid,
+			madera->type_name);
+		ret = -ENODEV;
+		goto err_reset;
+	}
+
+	/*
+	 * It looks like a device we support. If we don't have a hard reset
+	 * we can now attempt a soft reset.
+	 */
+	if (!madera->pdata.reset || madera->reset_errata) {
+		ret = madera_soft_reset(madera);
+		if (ret)
+			goto err_reset;
+	}
+
+	ret = madera_wait_for_boot(madera);
+	if (ret) {
+		dev_err(madera->dev, "Failed to clear boot done: %d\n", ret);
+		goto err_reset;
+	}
+
+	ret = regmap_read(madera->regmap, MADERA_HARDWARE_REVISION,
+			  &madera->rev);
+	if (ret) {
+		dev_err(dev, "Failed to read revision register: %d\n", ret);
+		goto err_reset;
+	}
+	madera->rev &= MADERA_HW_REVISION_MASK;
+
+	dev_info(dev, "%s silicon revision %d\n", madera->type_name,
+		 madera->rev);
+
+	/* Apply hardware patch */
+	if (patch_fn) {
+		ret = patch_fn(madera);
+		if (ret) {
+			dev_err(madera->dev, "Failed to apply patch %d\n", ret);
+			goto err_reset;
+		}
+	}
+
+	/* Init 32k clock sourced from MCLK2 */
+	ret = clk_prepare_enable(madera->mclk[MADERA_MCLK2].clk);
+	if (ret) {
+		dev_err(madera->dev, "Failed to enable 32k clock: %d\n", ret);
+		goto err_reset;
+	}
+
+	ret = regmap_update_bits(madera->regmap,
+			MADERA_CLOCK_32K_1,
+			MADERA_CLK_32K_ENA_MASK | MADERA_CLK_32K_SRC_MASK,
+			MADERA_CLK_32K_ENA | MADERA_32KZ_MCLK2);
+	if (ret) {
+		dev_err(madera->dev, "Failed to init 32k clock: %d\n", ret);
+		goto err_clock;
+	}
+
+	pm_runtime_set_active(madera->dev);
+	pm_runtime_enable(madera->dev);
+	pm_runtime_set_autosuspend_delay(madera->dev, 100);
+	pm_runtime_use_autosuspend(madera->dev);
+
+	/* No devm_ because we need to control shutdown order of children */
+	ret = mfd_add_devices(madera->dev, PLATFORM_DEVID_NONE,
+			      mfd_devs, n_devs,
+			      NULL, 0, NULL);
+	if (ret) {
+		dev_err(madera->dev, "Failed to add subdevices: %d\n", ret);
+		goto err_pm_runtime;
+	}
+
+	return 0;
+
+err_pm_runtime:
+	pm_runtime_disable(madera->dev);
+err_clock:
+	clk_disable_unprepare(madera->mclk[MADERA_MCLK2].clk);
+err_reset:
+	madera_enable_hard_reset(madera);
+	regulator_disable(madera->dcvdd);
+err_enable:
+	regulator_bulk_disable(madera->num_core_supplies,
+			       madera->core_supplies);
+err_dcvdd:
+	regulator_put(madera->dcvdd);
+err_devs:
+	mfd_remove_devices(dev);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(madera_dev_init);
+
+int madera_dev_exit(struct madera *madera)
+{
+	/* Prevent any IRQs being serviced while we clean up */
+	disable_irq(madera->irq);
+
+	pm_runtime_get_sync(madera->dev);
+
+	mfd_remove_devices(madera->dev);
+
+	pm_runtime_disable(madera->dev);
+
+	regulator_disable(madera->dcvdd);
+	regulator_put(madera->dcvdd);
+
+	mfd_remove_devices_late(madera->dev);
+
+	pm_runtime_set_suspended(madera->dev);
+	pm_runtime_put_noidle(madera->dev);
+
+	clk_disable_unprepare(madera->mclk[MADERA_MCLK2].clk);
+
+	madera_enable_hard_reset(madera);
+
+	regulator_bulk_disable(madera->num_core_supplies,
+			       madera->core_supplies);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(madera_dev_exit);
+
+MODULE_DESCRIPTION("Madera core MFD driver");
+MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
+MODULE_LICENSE("GPL v2");