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, 495 insertions, 0 deletions

diff --git a/drivers/regulator/rt6190-regulator.c b/drivers/regulator/rt6190-regulator.c
new file mode 100644
index 000000000..995e028ab
--- /dev/null
+++ b/drivers/regulator/rt6190-regulator.c
@@ -0,0 +1,495 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Author: ChiYuan Huang <cy_huang@richtek.com>
+ *
+ */
+
+#include <linux/bits.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+
+#define RT6190_REG_VID		0x00
+#define RT6190_REG_OUTV		0x01
+#define RT6190_REG_OUTC		0x03
+#define RT6190_REG_SET1		0x0D
+#define RT6190_REG_SET2		0x0E
+#define RT6190_REG_SET4		0x10
+#define RT6190_REG_RATIO	0x11
+#define RT6190_REG_OUT_VOLT_L	0x12
+#define RT6190_REG_TEMP_H	0x1B
+#define RT6190_REG_STAT1	0x1C
+#define RT6190_REG_ALERT1	0x1E
+#define RT6190_REG_ALERT2	0x1F
+#define RT6190_REG_MASK2	0x21
+#define RT6190_REG_OCPEN	0x28
+#define RT6190_REG_SET5		0x29
+#define RT6190_REG_VBUSC_ADC	0x32
+#define RT6190_REG_BUSC_VOLT_L	0x33
+#define RT6190_REG_BUSC_VOLT_H	0x34
+#define RT6190_REG_STAT3	0x37
+#define RT6190_REG_ALERT3	0x38
+#define RT6190_REG_MASK3	0x39
+
+#define RT6190_ENPWM_MASK	BIT(7)
+#define RT6190_ENDCHG_MASK	BIT(4)
+#define RT6190_ALERT_OTPEVT	BIT(6)
+#define RT6190_ALERT_UVPEVT	BIT(5)
+#define RT6190_ALERT_OVPEVT	BIT(4)
+#define RT6190_ENGCP_MASK	BIT(1)
+#define RT6190_FCCM_MASK	BIT(7)
+
+#define RICHTEK_VID		0x82
+#define RT6190_OUT_MIN_UV	3000000
+#define RT6190_OUT_MAX_UV	32000000
+#define RT6190_OUT_STEP_UV	20000
+#define RT6190_OUT_N_VOLT	(RT6190_OUT_MAX_UV / RT6190_OUT_STEP_UV + 1)
+#define RT6190_OUTV_MINSEL	150
+#define RT6190_OUT_MIN_UA	306000
+#define RT6190_OUT_MAX_UA	12114000
+#define RT6190_OUT_STEP_UA	24000
+#define RT6190_OUTC_MINSEL	19
+#define RT6190_EN_TIME_US	500
+
+#define RT6190_PSM_MODE		0
+#define RT6190_FCCM_MODE	1
+
+struct rt6190_data {
+	struct device *dev;
+	struct regmap *regmap;
+	struct gpio_desc *enable_gpio;
+	unsigned int cached_alert_evt;
+};
+
+static int rt6190_out_set_voltage_sel(struct regulator_dev *rdev,
+				      unsigned int selector)
+{
+	struct regmap *regmap = rdev_get_regmap(rdev);
+	__le16 le_sel = cpu_to_le16(selector);
+
+	return regmap_raw_write(regmap, RT6190_REG_OUTV, &le_sel,
+				sizeof(le_sel));
+}
+
+static int rt6190_out_get_voltage_sel(struct regulator_dev *rdev)
+{
+	struct regmap *regmap = rdev_get_regmap(rdev);
+	__le16 le_sel;
+	int ret;
+
+	ret = regmap_raw_read(regmap, RT6190_REG_OUTV, &le_sel, sizeof(le_sel));
+
+	return ret ?: le16_to_cpu(le_sel);
+}
+
+static int rt6190_out_enable(struct regulator_dev *rdev)
+{
+	struct rt6190_data *data = rdev_get_drvdata(rdev);
+	struct regmap *regmap = rdev_get_regmap(rdev);
+	u8 out_cfg[4];
+	int ret;
+
+	pm_runtime_get_sync(data->dev);
+
+	/*
+	 * From off to on, vout config will restore to IC default.
+	 * Read vout configs before enable, and restore them after enable
+	 */
+	ret = regmap_raw_read(regmap, RT6190_REG_OUTV, out_cfg,
+			      sizeof(out_cfg));
+	if (ret)
+		return ret;
+
+	ret = regulator_enable_regmap(rdev);
+	if (ret)
+		return ret;
+
+	ret = regmap_raw_write(regmap, RT6190_REG_OUTV, out_cfg,
+			       sizeof(out_cfg));
+	if (ret)
+		return ret;
+
+	return regmap_update_bits(regmap, RT6190_REG_SET5, RT6190_ENGCP_MASK,
+				  RT6190_ENGCP_MASK);
+}
+
+static int rt6190_out_disable(struct regulator_dev *rdev)
+{
+	struct rt6190_data *data = rdev_get_drvdata(rdev);
+	struct regmap *regmap = rdev_get_regmap(rdev);
+	int ret;
+
+	ret = regmap_update_bits(regmap, RT6190_REG_SET5, RT6190_ENGCP_MASK, 0);
+	if (ret)
+		return ret;
+
+	ret = regulator_disable_regmap(rdev);
+	if (ret)
+		return ret;
+
+	/* cleared cached alert event */
+	data->cached_alert_evt = 0;
+
+	pm_runtime_put(data->dev);
+
+	return 0;
+}
+
+static int rt6190_out_set_current_limit(struct regulator_dev *rdev, int min_uA,
+					int max_uA)
+{
+	struct regmap *regmap = rdev_get_regmap(rdev);
+	int csel, clim;
+	__le16 le_csel;
+
+	if (min_uA < RT6190_OUT_MIN_UA || max_uA > RT6190_OUT_MAX_UA)
+		return -EINVAL;
+
+	csel = DIV_ROUND_UP(min_uA - RT6190_OUT_MIN_UA, RT6190_OUT_STEP_UA);
+
+	clim = RT6190_OUT_MIN_UA + RT6190_OUT_STEP_UA * csel;
+	if (clim > max_uA)
+		return -EINVAL;
+
+	csel += RT6190_OUTC_MINSEL;
+	le_csel = cpu_to_le16(csel);
+
+	return regmap_raw_write(regmap, RT6190_REG_OUTC, &le_csel,
+				sizeof(le_csel));
+}
+
+static int rt6190_out_get_current_limit(struct regulator_dev *rdev)
+{
+	struct regmap *regmap = rdev_get_regmap(rdev);
+	__le16 le_csel;
+	int csel, ret;
+
+	ret = regmap_raw_read(regmap, RT6190_REG_OUTC, &le_csel,
+			      sizeof(le_csel));
+	if (ret)
+		return ret;
+
+	csel = le16_to_cpu(le_csel);
+	csel -= RT6190_OUTC_MINSEL;
+
+	return RT6190_OUT_MIN_UA + RT6190_OUT_STEP_UA * csel;
+}
+
+static int rt6190_out_set_mode(struct regulator_dev *rdev, unsigned int mode)
+{
+	struct regmap *regmap = rdev_get_regmap(rdev);
+	unsigned int val;
+
+	switch (mode) {
+	case REGULATOR_MODE_FAST:
+		val = RT6190_FCCM_MASK;
+		break;
+	case REGULATOR_MODE_NORMAL:
+		val = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return regmap_update_bits(regmap, RT6190_REG_SET1, RT6190_FCCM_MASK,
+				  val);
+}
+
+static unsigned int rt6190_out_get_mode(struct regulator_dev *rdev)
+{
+	struct regmap *regmap = rdev_get_regmap(rdev);
+	unsigned int config;
+	int ret;
+
+	ret = regmap_read(regmap, RT6190_REG_SET1, &config);
+	if (ret)
+		return REGULATOR_MODE_INVALID;
+
+	if (config & RT6190_FCCM_MASK)
+		return REGULATOR_MODE_FAST;
+
+	return REGULATOR_MODE_NORMAL;
+}
+
+static int rt6190_out_get_error_flags(struct regulator_dev *rdev,
+				      unsigned int *flags)
+{
+	struct rt6190_data *data = rdev_get_drvdata(rdev);
+	unsigned int state, rpt_flags = 0;
+	int ret;
+
+	ret = regmap_read(data->regmap, RT6190_REG_STAT1, &state);
+	if (ret)
+		return ret;
+
+	state |= data->cached_alert_evt;
+
+	if (state & RT6190_ALERT_OTPEVT)
+		rpt_flags |= REGULATOR_ERROR_OVER_TEMP;
+
+	if (state & RT6190_ALERT_UVPEVT)
+		rpt_flags |= REGULATOR_ERROR_UNDER_VOLTAGE;
+
+	if (state & RT6190_ALERT_OVPEVT)
+		rpt_flags |= REGULATOR_ERROR_REGULATION_OUT;
+
+	*flags = rpt_flags;
+
+	return 0;
+}
+
+static unsigned int rt6190_out_of_map_mode(unsigned int mode)
+{
+	switch (mode) {
+	case RT6190_PSM_MODE:
+		return REGULATOR_MODE_NORMAL;
+	case RT6190_FCCM_MODE:
+		return REGULATOR_MODE_FAST;
+	default:
+		return REGULATOR_MODE_INVALID;
+	}
+}
+
+static const struct regulator_ops rt6190_regulator_ops = {
+	.list_voltage = regulator_list_voltage_linear,
+	.set_voltage_sel = rt6190_out_set_voltage_sel,
+	.get_voltage_sel = rt6190_out_get_voltage_sel,
+	.enable = rt6190_out_enable,
+	.disable = rt6190_out_disable,
+	.is_enabled = regulator_is_enabled_regmap,
+	.set_current_limit = rt6190_out_set_current_limit,
+	.get_current_limit = rt6190_out_get_current_limit,
+	.set_active_discharge = regulator_set_active_discharge_regmap,
+	.set_mode = rt6190_out_set_mode,
+	.get_mode = rt6190_out_get_mode,
+	.get_error_flags = rt6190_out_get_error_flags,
+};
+
+static const struct regulator_desc rt6190_regulator_desc = {
+	.name = "rt6190-regulator",
+	.type = REGULATOR_VOLTAGE,
+	.owner = THIS_MODULE,
+	.ops = &rt6190_regulator_ops,
+	.min_uV = RT6190_OUT_MIN_UV,
+	.uV_step = RT6190_OUT_STEP_UV,
+	.n_voltages = RT6190_OUT_N_VOLT,
+	.linear_min_sel = RT6190_OUTV_MINSEL,
+	.enable_reg = RT6190_REG_SET2,
+	.enable_mask = RT6190_ENPWM_MASK,
+	.active_discharge_reg = RT6190_REG_SET2,
+	.active_discharge_mask = RT6190_ENDCHG_MASK,
+	.active_discharge_on = RT6190_ENDCHG_MASK,
+	.of_map_mode = rt6190_out_of_map_mode,
+};
+
+static bool rt6190_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case RT6190_REG_OUT_VOLT_L ... RT6190_REG_ALERT2:
+	case RT6190_REG_BUSC_VOLT_L ... RT6190_REG_BUSC_VOLT_H:
+	case RT6190_REG_STAT3 ... RT6190_REG_ALERT3:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct regmap_config rt6190_regmap_config = {
+	.name = "rt6190",
+	.cache_type = REGCACHE_FLAT,
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = RT6190_REG_MASK3,
+	.num_reg_defaults_raw = RT6190_REG_MASK3 + 1,
+	.volatile_reg = rt6190_is_volatile_reg,
+};
+
+static irqreturn_t rt6190_irq_handler(int irq, void *devid)
+{
+	struct regulator_dev *rdev = devid;
+	struct rt6190_data *data = rdev_get_drvdata(rdev);
+	unsigned int alert;
+	int ret;
+
+	ret = regmap_read(data->regmap, RT6190_REG_ALERT1, &alert);
+	if (ret)
+		return IRQ_NONE;
+
+	/* Write clear alert events */
+	ret = regmap_write(data->regmap, RT6190_REG_ALERT1, alert);
+	if (ret)
+		return IRQ_NONE;
+
+	data->cached_alert_evt |= alert;
+
+	if (alert & RT6190_ALERT_OTPEVT)
+		regulator_notifier_call_chain(rdev, REGULATOR_EVENT_OVER_TEMP, NULL);
+
+	if (alert & RT6190_ALERT_UVPEVT)
+		regulator_notifier_call_chain(rdev, REGULATOR_EVENT_UNDER_VOLTAGE, NULL);
+
+	if (alert & RT6190_ALERT_OVPEVT)
+		regulator_notifier_call_chain(rdev, REGULATOR_EVENT_REGULATION_OUT, NULL);
+
+	return IRQ_HANDLED;
+}
+
+static int rt6190_init_registers(struct regmap *regmap)
+{
+	int ret;
+
+	/* Enable_ADC = 1 */
+	ret = regmap_write(regmap, RT6190_REG_SET4, 0x82);
+	if (ret)
+		return ret;
+
+	/* Config default VOUT ratio to be higher */
+	ret = regmap_write(regmap, RT6190_REG_RATIO, 0x20);
+
+	/* Mask unused alert */
+	ret = regmap_write(regmap, RT6190_REG_MASK2, 0);
+	if (ret)
+		return ret;
+
+	/* OCP config */
+	ret = regmap_write(regmap, RT6190_REG_OCPEN, 0);
+	if (ret)
+		return ret;
+
+	/* Enable VBUSC ADC */
+	return regmap_write(regmap, RT6190_REG_VBUSC_ADC, 0x02);
+}
+
+static int rt6190_probe(struct i2c_client *i2c)
+{
+	struct device *dev = &i2c->dev;
+	struct rt6190_data *data;
+	struct gpio_desc *enable_gpio;
+	struct regmap *regmap;
+	struct regulator_dev *rdev;
+	struct regulator_config cfg = {};
+	unsigned int vid;
+	int ret;
+
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_HIGH);
+	if (IS_ERR(enable_gpio))
+		return dev_err_probe(dev, PTR_ERR(enable_gpio), "Failed to get 'enable' gpio\n");
+	else if (enable_gpio)
+		usleep_range(RT6190_EN_TIME_US, RT6190_EN_TIME_US * 2);
+
+	regmap = devm_regmap_init_i2c(i2c, &rt6190_regmap_config);
+	if (IS_ERR(regmap))
+		return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n");
+
+	data->dev = dev;
+	data->enable_gpio = enable_gpio;
+	data->regmap = regmap;
+	i2c_set_clientdata(i2c, data);
+
+	ret = regmap_read(regmap, RT6190_REG_VID, &vid);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to read VID\n");
+
+	if (vid != RICHTEK_VID)
+		return dev_err_probe(dev, -ENODEV, "Incorrect VID 0x%02x\n", vid);
+
+	ret = rt6190_init_registers(regmap);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to init registers\n");
+
+	pm_runtime_set_active(dev);
+	ret = devm_pm_runtime_enable(dev);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to set pm_runtime enable\n");
+
+	cfg.dev = dev;
+	cfg.of_node = dev->of_node;
+	cfg.driver_data = data;
+	cfg.init_data = of_get_regulator_init_data(dev, dev->of_node,
+						   &rt6190_regulator_desc);
+
+	rdev = devm_regulator_register(dev, &rt6190_regulator_desc, &cfg);
+	if (IS_ERR(rdev))
+		return dev_err_probe(dev, PTR_ERR(rdev), "Failed to register regulator\n");
+
+	if (i2c->irq) {
+		ret = devm_request_threaded_irq(dev, i2c->irq, NULL,
+						rt6190_irq_handler,
+						IRQF_ONESHOT, dev_name(dev),
+						rdev);
+		if (ret)
+			return dev_err_probe(dev, ret, "Failed to register interrupt\n");
+	}
+
+	return 0;
+}
+
+static int rt6190_runtime_suspend(struct device *dev)
+{
+	struct rt6190_data *data = dev_get_drvdata(dev);
+	struct regmap *regmap = data->regmap;
+
+	if (!data->enable_gpio)
+		return 0;
+
+	regcache_cache_only(regmap, true);
+	regcache_mark_dirty(regmap);
+
+	gpiod_set_value(data->enable_gpio, 0);
+
+	return 0;
+}
+
+static int rt6190_runtime_resume(struct device *dev)
+{
+	struct rt6190_data *data = dev_get_drvdata(dev);
+	struct regmap *regmap = data->regmap;
+
+	if (!data->enable_gpio)
+		return 0;
+
+	gpiod_set_value(data->enable_gpio, 1);
+	usleep_range(RT6190_EN_TIME_US, RT6190_EN_TIME_US * 2);
+
+	regcache_cache_only(regmap, false);
+	return regcache_sync(regmap);
+}
+
+static const struct dev_pm_ops __maybe_unused rt6190_dev_pm = {
+	RUNTIME_PM_OPS(rt6190_runtime_suspend, rt6190_runtime_resume, NULL)
+};
+
+static const struct of_device_id rt6190_of_dev_table[] = {
+	{ .compatible = "richtek,rt6190" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, rt6190_of_dev_table);
+
+static struct i2c_driver rt6190_driver = {
+	.driver = {
+		.name = "rt6190",
+		.of_match_table = rt6190_of_dev_table,
+		.pm = pm_ptr(&rt6190_dev_pm),
+	},
+	.probe_new = rt6190_probe,
+};
+module_i2c_driver(rt6190_driver);
+
+MODULE_DESCRIPTION("Richtek RT6190 regulator driver");
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_LICENSE("GPL");