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, 631 insertions, 0 deletions

diff --git a/drivers/regulator/bd71815-regulator.c b/drivers/regulator/bd71815-regulator.c
new file mode 100644
index 000000000..8b55046ed
--- /dev/null
+++ b/drivers/regulator/bd71815-regulator.c
@@ -0,0 +1,631 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright 2014 Embest Technology Co. Ltd. Inc.
+// bd71815-regulator.c ROHM BD71815 regulator driver
+//
+// Author: Tony Luo <luofc@embedinfo.com>
+//
+// Partially rewritten at 2021 by
+// Matti Vaittinen <matti.vaitinen@fi.rohmeurope.com>
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/gpio/consumer.h>
+#include <linux/regulator/driver.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/mfd/rohm-generic.h>
+#include <linux/mfd/rohm-bd71815.h>
+#include <linux/regulator/of_regulator.h>
+
+struct bd71815_regulator {
+	struct regulator_desc desc;
+	const struct rohm_dvs_config *dvs;
+};
+
+static const int bd7181x_wled_currents[] = {
+	10, 20, 30, 50, 70, 100, 200, 300, 500, 700, 1000, 2000, 3000, 4000,
+	5000, 6000, 7000, 8000, 9000, 10000, 11000, 12000, 13000, 14000, 15000,
+	16000, 17000, 18000, 19000, 20000, 21000, 22000, 23000, 24000, 25000,
+};
+
+static const struct rohm_dvs_config buck1_dvs = {
+	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
+				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
+	.run_reg		= BD71815_REG_BUCK1_VOLT_H,
+	.run_mask		= BD71815_VOLT_MASK,
+	.run_on_mask		= BD71815_BUCK_RUN_ON,
+	.snvs_on_mask		= BD71815_BUCK_SNVS_ON,
+	.suspend_reg		= BD71815_REG_BUCK1_VOLT_L,
+	.suspend_mask		= BD71815_VOLT_MASK,
+	.suspend_on_mask	= BD71815_BUCK_SUSP_ON,
+	.lpsr_reg		= BD71815_REG_BUCK1_VOLT_L,
+	.lpsr_mask		= BD71815_VOLT_MASK,
+	.lpsr_on_mask		= BD71815_BUCK_LPSR_ON,
+};
+
+static const struct rohm_dvs_config buck2_dvs = {
+	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
+				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
+	.run_reg		= BD71815_REG_BUCK2_VOLT_H,
+	.run_mask		= BD71815_VOLT_MASK,
+	.run_on_mask		= BD71815_BUCK_RUN_ON,
+	.snvs_on_mask		= BD71815_BUCK_SNVS_ON,
+	.suspend_reg		= BD71815_REG_BUCK2_VOLT_L,
+	.suspend_mask		= BD71815_VOLT_MASK,
+	.suspend_on_mask	= BD71815_BUCK_SUSP_ON,
+	.lpsr_reg		= BD71815_REG_BUCK2_VOLT_L,
+	.lpsr_mask		= BD71815_VOLT_MASK,
+	.lpsr_on_mask		= BD71815_BUCK_LPSR_ON,
+};
+
+static const struct rohm_dvs_config buck3_dvs = {
+	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
+				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
+	.run_reg		= BD71815_REG_BUCK3_VOLT,
+	.run_mask		= BD71815_VOLT_MASK,
+	.run_on_mask		= BD71815_BUCK_RUN_ON,
+	.snvs_on_mask		= BD71815_BUCK_SNVS_ON,
+	.suspend_on_mask	= BD71815_BUCK_SUSP_ON,
+	.lpsr_on_mask		= BD71815_BUCK_LPSR_ON,
+};
+
+static const struct rohm_dvs_config buck4_dvs = {
+	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
+				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
+	.run_reg		= BD71815_REG_BUCK4_VOLT,
+	.run_mask		= BD71815_VOLT_MASK,
+	.run_on_mask		= BD71815_BUCK_RUN_ON,
+	.snvs_on_mask		= BD71815_BUCK_SNVS_ON,
+	.suspend_on_mask	= BD71815_BUCK_SUSP_ON,
+	.lpsr_on_mask		= BD71815_BUCK_LPSR_ON,
+};
+
+static const struct rohm_dvs_config ldo1_dvs = {
+	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
+				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
+	.run_reg		= BD71815_REG_LDO_MODE1,
+	.run_mask		= BD71815_VOLT_MASK,
+	.run_on_mask		= LDO1_RUN_ON,
+	.snvs_on_mask		= LDO1_SNVS_ON,
+	.suspend_on_mask	= LDO1_SUSP_ON,
+	.lpsr_on_mask		= LDO1_LPSR_ON,
+};
+
+static const struct rohm_dvs_config ldo2_dvs = {
+	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
+				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
+	.run_reg		= BD71815_REG_LDO_MODE2,
+	.run_mask		= BD71815_VOLT_MASK,
+	.run_on_mask		= LDO2_RUN_ON,
+	.snvs_on_mask		= LDO2_SNVS_ON,
+	.suspend_on_mask	= LDO2_SUSP_ON,
+	.lpsr_on_mask		= LDO2_LPSR_ON,
+};
+
+static const struct rohm_dvs_config ldo3_dvs = {
+	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
+				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
+	.run_reg		= BD71815_REG_LDO_MODE2,
+	.run_mask		= BD71815_VOLT_MASK,
+	.run_on_mask		= LDO3_RUN_ON,
+	.snvs_on_mask		= LDO3_SNVS_ON,
+	.suspend_on_mask	= LDO3_SUSP_ON,
+	.lpsr_on_mask		= LDO3_LPSR_ON,
+};
+
+static const struct rohm_dvs_config ldo4_dvs = {
+	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
+				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
+	.run_reg		= BD71815_REG_LDO_MODE3,
+	.run_mask		= BD71815_VOLT_MASK,
+	.run_on_mask		= LDO4_RUN_ON,
+	.snvs_on_mask		= LDO4_SNVS_ON,
+	.suspend_on_mask	= LDO4_SUSP_ON,
+	.lpsr_on_mask		= LDO4_LPSR_ON,
+};
+
+static const struct rohm_dvs_config ldo5_dvs = {
+	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
+				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
+	.run_reg		= BD71815_REG_LDO_MODE3,
+	.run_mask		= BD71815_VOLT_MASK,
+	.run_on_mask		= LDO5_RUN_ON,
+	.snvs_on_mask		= LDO5_SNVS_ON,
+	.suspend_on_mask	= LDO5_SUSP_ON,
+	.lpsr_on_mask		= LDO5_LPSR_ON,
+};
+
+static const struct rohm_dvs_config dvref_dvs = {
+	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
+				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
+	.run_on_mask		= DVREF_RUN_ON,
+	.snvs_on_mask		= DVREF_SNVS_ON,
+	.suspend_on_mask	= DVREF_SUSP_ON,
+	.lpsr_on_mask		= DVREF_LPSR_ON,
+};
+
+static const struct rohm_dvs_config ldolpsr_dvs = {
+	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
+				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
+	.run_on_mask		= DVREF_RUN_ON,
+	.snvs_on_mask		= DVREF_SNVS_ON,
+	.suspend_on_mask	= DVREF_SUSP_ON,
+	.lpsr_on_mask		= DVREF_LPSR_ON,
+};
+
+static const struct rohm_dvs_config buck5_dvs = {
+	.level_map		= ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
+				  ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
+	.run_reg		= BD71815_REG_BUCK5_VOLT,
+	.run_mask		= BD71815_VOLT_MASK,
+	.run_on_mask		= BD71815_BUCK_RUN_ON,
+	.snvs_on_mask		= BD71815_BUCK_SNVS_ON,
+	.suspend_on_mask	= BD71815_BUCK_SUSP_ON,
+	.lpsr_on_mask		= BD71815_BUCK_LPSR_ON,
+};
+
+static int set_hw_dvs_levels(struct device_node *np,
+			     const struct regulator_desc *desc,
+			     struct regulator_config *cfg)
+{
+	struct bd71815_regulator *data;
+
+	data = container_of(desc, struct bd71815_regulator, desc);
+	return rohm_regulator_set_dvs_levels(data->dvs, np, desc, cfg->regmap);
+}
+
+/*
+ * Bucks 1 and 2 have two voltage selection registers where selected
+ * voltage can be set. Which of the registers is used can be either controlled
+ * by a control bit in register - or by HW state. If HW state specific voltages
+ * are given - then we assume HW state based control should be used.
+ *
+ * If volatge value is updated to currently selected register - then output
+ * voltage is immediately changed no matter what is set as ramp rate. Thus we
+ * default changing voltage by writing new value to inactive register and
+ * then updating the 'register selection' bit. This naturally only works when
+ * HW state machine is not used to select the voltage.
+ */
+static int buck12_set_hw_dvs_levels(struct device_node *np,
+				    const struct regulator_desc *desc,
+				    struct regulator_config *cfg)
+{
+	struct bd71815_regulator *data;
+	int ret = 0, val;
+
+	data = container_of(desc, struct bd71815_regulator, desc);
+
+	if (of_find_property(np, "rohm,dvs-run-voltage", NULL) ||
+	    of_find_property(np, "rohm,dvs-suspend-voltage", NULL) ||
+	    of_find_property(np, "rohm,dvs-lpsr-voltage", NULL) ||
+	    of_find_property(np, "rohm,dvs-snvs-voltage", NULL)) {
+		ret = regmap_read(cfg->regmap, desc->vsel_reg, &val);
+		if (ret)
+			return ret;
+
+		if (!(BD71815_BUCK_STBY_DVS & val) &&
+		    !(BD71815_BUCK_DVSSEL & val)) {
+			int val2;
+
+			/*
+			 * We are currently using voltage from _L.
+			 * We'd better copy it to _H and switch to it to
+			 * avoid shutting us down if LPSR or SUSPEND is set to
+			 * disabled. _L value is at reg _H + 1
+			 */
+			ret = regmap_read(cfg->regmap, desc->vsel_reg + 1,
+					  &val2);
+			if (ret)
+				return ret;
+
+			ret = regmap_update_bits(cfg->regmap, desc->vsel_reg,
+						 BD71815_VOLT_MASK |
+						 BD71815_BUCK_DVSSEL,
+						 val2 | BD71815_BUCK_DVSSEL);
+			if (ret)
+				return ret;
+		}
+		ret = rohm_regulator_set_dvs_levels(data->dvs, np, desc,
+						    cfg->regmap);
+		if (ret)
+			return ret;
+		/*
+		 * DVS levels were given => use HW-state machine for voltage
+		 * controls. NOTE: AFAIK, This means that if voltage is changed
+		 * by SW the ramp-rate is not respected. Should we disable
+		 * SW voltage control when the HW state machine is used?
+		 */
+		ret = regmap_update_bits(cfg->regmap, desc->vsel_reg,
+					 BD71815_BUCK_STBY_DVS,
+					 BD71815_BUCK_STBY_DVS);
+	}
+
+	return ret;
+}
+
+/*
+ * BUCK1/2
+ * BUCK1RAMPRATE[1:0] BUCK1 DVS ramp rate setting
+ * 00: 10.00mV/usec	10mV 1uS
+ * 01: 5.00mV/usec	10mV 2uS
+ * 10: 2.50mV/usec	10mV 4uS
+ * 11: 1.25mV/usec	10mV 8uS
+ */
+static const unsigned int bd7181x_ramp_table[] = { 1250, 2500, 5000, 10000 };
+
+static int bd7181x_led_set_current_limit(struct regulator_dev *rdev,
+					int min_uA, int max_uA)
+{
+	int ret;
+	int onstatus;
+
+	onstatus = regulator_is_enabled_regmap(rdev);
+
+	ret = regulator_set_current_limit_regmap(rdev, min_uA, max_uA);
+	if (!ret) {
+		int newstatus;
+
+		newstatus = regulator_is_enabled_regmap(rdev);
+		if (onstatus != newstatus) {
+			/*
+			 * HW FIX: spurious led status change detected. Toggle
+			 * state as a workaround
+			 */
+			if (onstatus)
+				ret = regulator_enable_regmap(rdev);
+			else
+				ret = regulator_disable_regmap(rdev);
+
+			if (ret)
+				dev_err(rdev_get_dev(rdev),
+					"failed to revert the LED state (%d)\n",
+					ret);
+		}
+	}
+
+	return ret;
+}
+
+static int bd7181x_buck12_get_voltage_sel(struct regulator_dev *rdev)
+{
+	int rid = rdev_get_id(rdev);
+	int ret, regh, regl, val;
+
+	regh = BD71815_REG_BUCK1_VOLT_H + rid * 0x2;
+	regl = BD71815_REG_BUCK1_VOLT_L + rid * 0x2;
+
+	ret = regmap_read(rdev->regmap, regh, &val);
+	if (ret)
+		return ret;
+
+	/*
+	 * If we use HW state machine based voltage reg selection - then we
+	 * return BD71815_REG_BUCK1_VOLT_H which is used at RUN.
+	 * Else we do return the BD71815_REG_BUCK1_VOLT_H or
+	 * BD71815_REG_BUCK1_VOLT_L depending on which is selected to be used
+	 * by BD71815_BUCK_DVSSEL bit
+	 */
+	if ((!(val & BD71815_BUCK_STBY_DVS)) && (!(val & BD71815_BUCK_DVSSEL)))
+		ret = regmap_read(rdev->regmap, regl, &val);
+
+	if (ret)
+		return ret;
+
+	return val & BD71815_VOLT_MASK;
+}
+
+/*
+ * For Buck 1/2.
+ */
+static int bd7181x_buck12_set_voltage_sel(struct regulator_dev *rdev,
+					  unsigned int sel)
+{
+	int rid = rdev_get_id(rdev);
+	int ret, val, reg, regh, regl;
+
+	regh = BD71815_REG_BUCK1_VOLT_H + rid*0x2;
+	regl = BD71815_REG_BUCK1_VOLT_L + rid*0x2;
+
+	ret = regmap_read(rdev->regmap, regh, &val);
+	if (ret)
+		return ret;
+
+	/*
+	 * If bucks 1 & 2 are controlled by state machine - then the RUN state
+	 * voltage is set to BD71815_REG_BUCK1_VOLT_H. Changing SUSPEND/LPSR
+	 * voltages at runtime is not supported by this driver.
+	 */
+	if (((val & BD71815_BUCK_STBY_DVS))) {
+		return regmap_update_bits(rdev->regmap, regh, BD71815_VOLT_MASK,
+					  sel);
+	}
+	/* Update new voltage to the register which is not selected now */
+	if (val & BD71815_BUCK_DVSSEL)
+		reg = regl;
+	else
+		reg = regh;
+
+	ret = regmap_update_bits(rdev->regmap, reg, BD71815_VOLT_MASK, sel);
+	if (ret)
+		return ret;
+
+	/* Select the other DVS register to be used */
+	return regmap_update_bits(rdev->regmap, regh, BD71815_BUCK_DVSSEL,
+				  ~val);
+}
+
+static const struct regulator_ops bd7181x_ldo_regulator_ops = {
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.list_voltage = regulator_list_voltage_linear,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+};
+
+static const struct regulator_ops bd7181x_fixed_regulator_ops = {
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.list_voltage = regulator_list_voltage_linear,
+};
+
+static const struct regulator_ops bd7181x_buck_regulator_ops = {
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.list_voltage = regulator_list_voltage_linear,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_time_sel = regulator_set_voltage_time_sel,
+};
+
+static const struct regulator_ops bd7181x_buck12_regulator_ops = {
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.list_voltage = regulator_list_voltage_linear,
+	.set_voltage_sel = bd7181x_buck12_set_voltage_sel,
+	.get_voltage_sel = bd7181x_buck12_get_voltage_sel,
+	.set_voltage_time_sel = regulator_set_voltage_time_sel,
+	.set_ramp_delay = regulator_set_ramp_delay_regmap,
+};
+
+static const struct regulator_ops bd7181x_led_regulator_ops = {
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.set_current_limit = bd7181x_led_set_current_limit,
+	.get_current_limit = regulator_get_current_limit_regmap,
+};
+
+#define BD71815_FIXED_REG(_name, _id, ereg, emsk, voltage, _dvs)	\
+	[(_id)] = {							\
+		.desc = {						\
+			.name = #_name,					\
+			.of_match = of_match_ptr(#_name),		\
+			.regulators_node = of_match_ptr("regulators"),	\
+			.n_voltages = 1,				\
+			.ops = &bd7181x_fixed_regulator_ops,		\
+			.type = REGULATOR_VOLTAGE,			\
+			.id = (_id),					\
+			.owner = THIS_MODULE,				\
+			.min_uV = (voltage),				\
+			.enable_reg = (ereg),				\
+			.enable_mask = (emsk),				\
+			.of_parse_cb = set_hw_dvs_levels,		\
+		},							\
+		.dvs = (_dvs),						\
+	}
+
+#define BD71815_BUCK_REG(_name, _id, vsel, ereg, min, max, step, _dvs)	\
+	[(_id)] = {							\
+		.desc = {						\
+			.name = #_name,					\
+			.of_match = of_match_ptr(#_name),		\
+			.regulators_node = of_match_ptr("regulators"),	\
+			.n_voltages = ((max) - (min)) / (step) + 1,	\
+			.ops = &bd7181x_buck_regulator_ops,		\
+			.type = REGULATOR_VOLTAGE,			\
+			.id = (_id),					\
+			.owner = THIS_MODULE,				\
+			.min_uV = (min),				\
+			.uV_step = (step),				\
+			.vsel_reg = (vsel),				\
+			.vsel_mask = BD71815_VOLT_MASK,			\
+			.enable_reg = (ereg),				\
+			.enable_mask = BD71815_BUCK_RUN_ON,		\
+			.of_parse_cb = set_hw_dvs_levels,		\
+		},							\
+		.dvs = (_dvs),						\
+	}
+
+#define BD71815_BUCK12_REG(_name, _id, vsel, ereg, min, max, step,	\
+			   _dvs)					\
+	[(_id)] = {							\
+		.desc = {						\
+			.name = #_name,					\
+			.of_match = of_match_ptr(#_name),		\
+			.regulators_node = of_match_ptr("regulators"),	\
+			.n_voltages = ((max) - (min)) / (step) + 1,	\
+			.ops = &bd7181x_buck12_regulator_ops,		\
+			.type = REGULATOR_VOLTAGE,			\
+			.id = (_id),					\
+			.owner = THIS_MODULE,				\
+			.min_uV = (min),				\
+			.uV_step = (step),				\
+			.vsel_reg = (vsel),				\
+			.vsel_mask = BD71815_VOLT_MASK,			\
+			.enable_reg = (ereg),				\
+			.enable_mask = BD71815_BUCK_RUN_ON,		\
+			.ramp_reg = (ereg),				\
+			.ramp_mask = BD71815_BUCK_RAMPRATE_MASK,	\
+			.ramp_delay_table = bd7181x_ramp_table,		\
+			.n_ramp_values = ARRAY_SIZE(bd7181x_ramp_table),\
+			.of_parse_cb = buck12_set_hw_dvs_levels,	\
+		},							\
+		.dvs = (_dvs),						\
+	}
+
+#define BD71815_LED_REG(_name, _id, csel, mask, ereg, emsk, currents)	\
+	[(_id)] = {							\
+		.desc = {						\
+			.name = #_name,					\
+			.of_match = of_match_ptr(#_name),		\
+			.regulators_node = of_match_ptr("regulators"),	\
+			.n_current_limits = ARRAY_SIZE(currents),	\
+			.ops = &bd7181x_led_regulator_ops,		\
+			.type = REGULATOR_CURRENT,			\
+			.id = (_id),					\
+			.owner = THIS_MODULE,				\
+			.curr_table = currents,				\
+			.csel_reg = (csel),				\
+			.csel_mask = (mask),				\
+			.enable_reg = (ereg),				\
+			.enable_mask = (emsk),				\
+		},							\
+	}
+
+#define BD71815_LDO_REG(_name, _id, vsel, ereg, emsk, min, max, step,	\
+			_dvs)						\
+	[(_id)] = {							\
+		.desc = {						\
+			.name = #_name,					\
+			.of_match = of_match_ptr(#_name),		\
+			.regulators_node = of_match_ptr("regulators"),	\
+			.n_voltages = ((max) - (min)) / (step) + 1,	\
+			.ops = &bd7181x_ldo_regulator_ops,		\
+			.type = REGULATOR_VOLTAGE,			\
+			.id = (_id),					\
+			.owner = THIS_MODULE,				\
+			.min_uV = (min),				\
+			.uV_step = (step),				\
+			.vsel_reg = (vsel),				\
+			.vsel_mask = BD71815_VOLT_MASK,			\
+			.enable_reg = (ereg),				\
+			.enable_mask = (emsk),				\
+			.of_parse_cb = set_hw_dvs_levels,		\
+		},							\
+		.dvs = (_dvs),						\
+	}
+
+static const struct bd71815_regulator bd71815_regulators[] = {
+	BD71815_BUCK12_REG(buck1, BD71815_BUCK1, BD71815_REG_BUCK1_VOLT_H,
+			   BD71815_REG_BUCK1_MODE, 800000, 2000000, 25000,
+			   &buck1_dvs),
+	BD71815_BUCK12_REG(buck2, BD71815_BUCK2, BD71815_REG_BUCK2_VOLT_H,
+			   BD71815_REG_BUCK2_MODE, 800000, 2000000, 25000,
+			   &buck2_dvs),
+	BD71815_BUCK_REG(buck3, BD71815_BUCK3, BD71815_REG_BUCK3_VOLT,
+			 BD71815_REG_BUCK3_MODE,  1200000, 2700000, 50000,
+			 &buck3_dvs),
+	BD71815_BUCK_REG(buck4, BD71815_BUCK4, BD71815_REG_BUCK4_VOLT,
+			 BD71815_REG_BUCK4_MODE,  1100000, 1850000, 25000,
+			 &buck4_dvs),
+	BD71815_BUCK_REG(buck5, BD71815_BUCK5, BD71815_REG_BUCK5_VOLT,
+			 BD71815_REG_BUCK5_MODE,  1800000, 3300000, 50000,
+			 &buck5_dvs),
+	BD71815_LDO_REG(ldo1, BD71815_LDO1, BD71815_REG_LDO1_VOLT,
+			BD71815_REG_LDO_MODE1, LDO1_RUN_ON, 800000, 3300000,
+			50000, &ldo1_dvs),
+	BD71815_LDO_REG(ldo2, BD71815_LDO2, BD71815_REG_LDO2_VOLT,
+			BD71815_REG_LDO_MODE2, LDO2_RUN_ON, 800000, 3300000,
+			50000, &ldo2_dvs),
+	/*
+	 * Let's default LDO3 to be enabled by SW. We can override ops if DT
+	 * says LDO3 should be enabled by HW when DCIN is connected.
+	 */
+	BD71815_LDO_REG(ldo3, BD71815_LDO3, BD71815_REG_LDO3_VOLT,
+			BD71815_REG_LDO_MODE2, LDO3_RUN_ON, 800000, 3300000,
+			50000, &ldo3_dvs),
+	BD71815_LDO_REG(ldo4, BD71815_LDO4, BD71815_REG_LDO4_VOLT,
+			BD71815_REG_LDO_MODE3, LDO4_RUN_ON, 800000, 3300000,
+			50000, &ldo4_dvs),
+	BD71815_LDO_REG(ldo5, BD71815_LDO5, BD71815_REG_LDO5_VOLT_H,
+			BD71815_REG_LDO_MODE3, LDO5_RUN_ON, 800000, 3300000,
+			50000, &ldo5_dvs),
+	BD71815_FIXED_REG(ldodvref, BD71815_LDODVREF, BD71815_REG_LDO_MODE4,
+			  DVREF_RUN_ON, 3000000, &dvref_dvs),
+	BD71815_FIXED_REG(ldolpsr, BD71815_LDOLPSR, BD71815_REG_LDO_MODE4,
+			  LDO_LPSR_RUN_ON, 1800000, &ldolpsr_dvs),
+	BD71815_LED_REG(wled, BD71815_WLED, BD71815_REG_LED_DIMM, LED_DIMM_MASK,
+			BD71815_REG_LED_CTRL, LED_RUN_ON,
+			bd7181x_wled_currents),
+};
+
+static int bd7181x_probe(struct platform_device *pdev)
+{
+	struct regulator_config config = {};
+	int i, ret;
+	struct gpio_desc *ldo4_en;
+	struct regmap *regmap;
+
+	regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!regmap) {
+		dev_err(&pdev->dev, "No parent regmap\n");
+		return -ENODEV;
+	}
+
+	ldo4_en = devm_fwnode_gpiod_get(&pdev->dev,
+					dev_fwnode(pdev->dev.parent),
+					"rohm,vsel", GPIOD_ASIS, "ldo4-en");
+	if (IS_ERR(ldo4_en)) {
+		ret = PTR_ERR(ldo4_en);
+		if (ret != -ENOENT)
+			return ret;
+		ldo4_en = NULL;
+	}
+
+	/* Disable to go to ship-mode */
+	ret = regmap_update_bits(regmap, BD71815_REG_PWRCTRL, RESTARTEN, 0);
+	if (ret)
+		return ret;
+
+	config.dev = pdev->dev.parent;
+	config.regmap = regmap;
+
+	for (i = 0; i < BD71815_REGULATOR_CNT; i++) {
+		const struct regulator_desc *desc;
+		struct regulator_dev *rdev;
+
+		desc = &bd71815_regulators[i].desc;
+
+		if (i == BD71815_LDO4)
+			config.ena_gpiod = ldo4_en;
+		else
+			config.ena_gpiod = NULL;
+
+		rdev = devm_regulator_register(&pdev->dev, desc, &config);
+		if (IS_ERR(rdev))
+			return dev_err_probe(&pdev->dev, PTR_ERR(rdev),
+					     "failed to register %s regulator\n",
+					     desc->name);
+	}
+	return 0;
+}
+
+static const struct platform_device_id bd7181x_pmic_id[] = {
+	{ "bd71815-pmic", ROHM_CHIP_TYPE_BD71815 },
+	{ },
+};
+MODULE_DEVICE_TABLE(platform, bd7181x_pmic_id);
+
+static struct platform_driver bd7181x_regulator = {
+	.driver = {
+		.name = "bd7181x-pmic",
+	},
+	.probe = bd7181x_probe,
+	.id_table = bd7181x_pmic_id,
+};
+module_platform_driver(bd7181x_regulator);
+
+MODULE_AUTHOR("Tony Luo <luofc@embedinfo.com>");
+MODULE_DESCRIPTION("BD71815 voltage regulator driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:bd7181x-pmic");