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, 922 insertions, 0 deletions

diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c
new file mode 100644
index 000000000..48f02dcc8
--- /dev/null
+++ b/drivers/iio/adc/stm32-adc-core.c
@@ -0,0 +1,922 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * This file is part of STM32 ADC driver
+ *
+ * Copyright (C) 2016, STMicroelectronics - All Rights Reserved
+ * Author: Fabrice Gasnier <fabrice.gasnier@st.com>.
+ *
+ * Inspired from: fsl-imx25-tsadc
+ *
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/irqdesc.h>
+#include <linux/irqdomain.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/units.h>
+
+#include "stm32-adc-core.h"
+
+#define STM32_ADC_CORE_SLEEP_DELAY_MS	2000
+
+/* SYSCFG registers */
+#define STM32MP1_SYSCFG_PMCSETR		0x04
+#define STM32MP1_SYSCFG_PMCCLRR		0x44
+
+/* SYSCFG bit fields */
+#define STM32MP1_SYSCFG_ANASWVDD_MASK	BIT(9)
+
+/* SYSCFG capability flags */
+#define HAS_VBOOSTER		BIT(0)
+#define HAS_ANASWVDD		BIT(1)
+
+/**
+ * struct stm32_adc_common_regs - stm32 common registers
+ * @csr:	common status register offset
+ * @ccr:	common control register offset
+ * @eoc_msk:    array of eoc (end of conversion flag) masks in csr for adc1..n
+ * @ovr_msk:    array of ovr (overrun flag) masks in csr for adc1..n
+ * @ier:	interrupt enable register offset for each adc
+ * @eocie_msk:	end of conversion interrupt enable mask in @ier
+ */
+struct stm32_adc_common_regs {
+	u32 csr;
+	u32 ccr;
+	u32 eoc_msk[STM32_ADC_MAX_ADCS];
+	u32 ovr_msk[STM32_ADC_MAX_ADCS];
+	u32 ier;
+	u32 eocie_msk;
+};
+
+struct stm32_adc_priv;
+
+/**
+ * struct stm32_adc_priv_cfg - stm32 core compatible configuration data
+ * @regs:	common registers for all instances
+ * @clk_sel:	clock selection routine
+ * @max_clk_rate_hz: maximum analog clock rate (Hz, from datasheet)
+ * @ipid:	adc identification number
+ * @has_syscfg: SYSCFG capability flags
+ * @num_irqs:	number of interrupt lines
+ * @num_adcs:   maximum number of ADC instances in the common registers
+ */
+struct stm32_adc_priv_cfg {
+	const struct stm32_adc_common_regs *regs;
+	int (*clk_sel)(struct platform_device *, struct stm32_adc_priv *);
+	u32 max_clk_rate_hz;
+	u32 ipid;
+	unsigned int has_syscfg;
+	unsigned int num_irqs;
+	unsigned int num_adcs;
+};
+
+/**
+ * struct stm32_adc_priv - stm32 ADC core private data
+ * @irq:		irq(s) for ADC block
+ * @nb_adc_max:		actual maximum number of instance per ADC block
+ * @domain:		irq domain reference
+ * @aclk:		clock reference for the analog circuitry
+ * @bclk:		bus clock common for all ADCs, depends on part used
+ * @max_clk_rate:	desired maximum clock rate
+ * @booster:		booster supply reference
+ * @vdd:		vdd supply reference
+ * @vdda:		vdda analog supply reference
+ * @vref:		regulator reference
+ * @vdd_uv:		vdd supply voltage (microvolts)
+ * @vdda_uv:		vdda supply voltage (microvolts)
+ * @cfg:		compatible configuration data
+ * @common:		common data for all ADC instances
+ * @ccr_bak:		backup CCR in low power mode
+ * @syscfg:		reference to syscon, system control registers
+ */
+struct stm32_adc_priv {
+	int				irq[STM32_ADC_MAX_ADCS];
+	unsigned int			nb_adc_max;
+	struct irq_domain		*domain;
+	struct clk			*aclk;
+	struct clk			*bclk;
+	u32				max_clk_rate;
+	struct regulator		*booster;
+	struct regulator		*vdd;
+	struct regulator		*vdda;
+	struct regulator		*vref;
+	int				vdd_uv;
+	int				vdda_uv;
+	const struct stm32_adc_priv_cfg	*cfg;
+	struct stm32_adc_common		common;
+	u32				ccr_bak;
+	struct regmap			*syscfg;
+};
+
+static struct stm32_adc_priv *to_stm32_adc_priv(struct stm32_adc_common *com)
+{
+	return container_of(com, struct stm32_adc_priv, common);
+}
+
+/* STM32F4 ADC internal common clock prescaler division ratios */
+static int stm32f4_pclk_div[] = {2, 4, 6, 8};
+
+/**
+ * stm32f4_adc_clk_sel() - Select stm32f4 ADC common clock prescaler
+ * @pdev: platform device
+ * @priv: stm32 ADC core private data
+ * Select clock prescaler used for analog conversions, before using ADC.
+ */
+static int stm32f4_adc_clk_sel(struct platform_device *pdev,
+			       struct stm32_adc_priv *priv)
+{
+	unsigned long rate;
+	u32 val;
+	int i;
+
+	/* stm32f4 has one clk input for analog (mandatory), enforce it here */
+	if (!priv->aclk) {
+		dev_err(&pdev->dev, "No 'adc' clock found\n");
+		return -ENOENT;
+	}
+
+	rate = clk_get_rate(priv->aclk);
+	if (!rate) {
+		dev_err(&pdev->dev, "Invalid clock rate: 0\n");
+		return -EINVAL;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(stm32f4_pclk_div); i++) {
+		if ((rate / stm32f4_pclk_div[i]) <= priv->max_clk_rate)
+			break;
+	}
+	if (i >= ARRAY_SIZE(stm32f4_pclk_div)) {
+		dev_err(&pdev->dev, "adc clk selection failed\n");
+		return -EINVAL;
+	}
+
+	priv->common.rate = rate / stm32f4_pclk_div[i];
+	val = readl_relaxed(priv->common.base + STM32F4_ADC_CCR);
+	val &= ~STM32F4_ADC_ADCPRE_MASK;
+	val |= i << STM32F4_ADC_ADCPRE_SHIFT;
+	writel_relaxed(val, priv->common.base + STM32F4_ADC_CCR);
+
+	dev_dbg(&pdev->dev, "Using analog clock source at %ld kHz\n",
+		priv->common.rate / 1000);
+
+	return 0;
+}
+
+/**
+ * struct stm32h7_adc_ck_spec - specification for stm32h7 adc clock
+ * @ckmode: ADC clock mode, Async or sync with prescaler.
+ * @presc: prescaler bitfield for async clock mode
+ * @div: prescaler division ratio
+ */
+struct stm32h7_adc_ck_spec {
+	u32 ckmode;
+	u32 presc;
+	int div;
+};
+
+static const struct stm32h7_adc_ck_spec stm32h7_adc_ckmodes_spec[] = {
+	/* 00: CK_ADC[1..3]: Asynchronous clock modes */
+	{ 0, 0, 1 },
+	{ 0, 1, 2 },
+	{ 0, 2, 4 },
+	{ 0, 3, 6 },
+	{ 0, 4, 8 },
+	{ 0, 5, 10 },
+	{ 0, 6, 12 },
+	{ 0, 7, 16 },
+	{ 0, 8, 32 },
+	{ 0, 9, 64 },
+	{ 0, 10, 128 },
+	{ 0, 11, 256 },
+	/* HCLK used: Synchronous clock modes (1, 2 or 4 prescaler) */
+	{ 1, 0, 1 },
+	{ 2, 0, 2 },
+	{ 3, 0, 4 },
+};
+
+static int stm32h7_adc_clk_sel(struct platform_device *pdev,
+			       struct stm32_adc_priv *priv)
+{
+	u32 ckmode, presc, val;
+	unsigned long rate;
+	int i, div, duty;
+
+	/* stm32h7 bus clock is common for all ADC instances (mandatory) */
+	if (!priv->bclk) {
+		dev_err(&pdev->dev, "No 'bus' clock found\n");
+		return -ENOENT;
+	}
+
+	/*
+	 * stm32h7 can use either 'bus' or 'adc' clock for analog circuitry.
+	 * So, choice is to have bus clock mandatory and adc clock optional.
+	 * If optional 'adc' clock has been found, then try to use it first.
+	 */
+	if (priv->aclk) {
+		/*
+		 * Asynchronous clock modes (e.g. ckmode == 0)
+		 * From spec: PLL output musn't exceed max rate
+		 */
+		rate = clk_get_rate(priv->aclk);
+		if (!rate) {
+			dev_err(&pdev->dev, "Invalid adc clock rate: 0\n");
+			return -EINVAL;
+		}
+
+		/* If duty is an error, kindly use at least /2 divider */
+		duty = clk_get_scaled_duty_cycle(priv->aclk, 100);
+		if (duty < 0)
+			dev_warn(&pdev->dev, "adc clock duty: %d\n", duty);
+
+		for (i = 0; i < ARRAY_SIZE(stm32h7_adc_ckmodes_spec); i++) {
+			ckmode = stm32h7_adc_ckmodes_spec[i].ckmode;
+			presc = stm32h7_adc_ckmodes_spec[i].presc;
+			div = stm32h7_adc_ckmodes_spec[i].div;
+
+			if (ckmode)
+				continue;
+
+			/*
+			 * For proper operation, clock duty cycle range is 49%
+			 * to 51%. Apply at least /2 prescaler otherwise.
+			 */
+			if (div == 1 && (duty < 49 || duty > 51))
+				continue;
+
+			if ((rate / div) <= priv->max_clk_rate)
+				goto out;
+		}
+	}
+
+	/* Synchronous clock modes (e.g. ckmode is 1, 2 or 3) */
+	rate = clk_get_rate(priv->bclk);
+	if (!rate) {
+		dev_err(&pdev->dev, "Invalid bus clock rate: 0\n");
+		return -EINVAL;
+	}
+
+	duty = clk_get_scaled_duty_cycle(priv->bclk, 100);
+	if (duty < 0)
+		dev_warn(&pdev->dev, "bus clock duty: %d\n", duty);
+
+	for (i = 0; i < ARRAY_SIZE(stm32h7_adc_ckmodes_spec); i++) {
+		ckmode = stm32h7_adc_ckmodes_spec[i].ckmode;
+		presc = stm32h7_adc_ckmodes_spec[i].presc;
+		div = stm32h7_adc_ckmodes_spec[i].div;
+
+		if (!ckmode)
+			continue;
+
+		if (div == 1 && (duty < 49 || duty > 51))
+			continue;
+
+		if ((rate / div) <= priv->max_clk_rate)
+			goto out;
+	}
+
+	dev_err(&pdev->dev, "adc clk selection failed\n");
+	return -EINVAL;
+
+out:
+	/* rate used later by each ADC instance to control BOOST mode */
+	priv->common.rate = rate / div;
+
+	/* Set common clock mode and prescaler */
+	val = readl_relaxed(priv->common.base + STM32H7_ADC_CCR);
+	val &= ~(STM32H7_CKMODE_MASK | STM32H7_PRESC_MASK);
+	val |= ckmode << STM32H7_CKMODE_SHIFT;
+	val |= presc << STM32H7_PRESC_SHIFT;
+	writel_relaxed(val, priv->common.base + STM32H7_ADC_CCR);
+
+	dev_dbg(&pdev->dev, "Using %s clock/%d source at %ld kHz\n",
+		ckmode ? "bus" : "adc", div, priv->common.rate / 1000);
+
+	return 0;
+}
+
+/* STM32F4 common registers definitions */
+static const struct stm32_adc_common_regs stm32f4_adc_common_regs = {
+	.csr = STM32F4_ADC_CSR,
+	.ccr = STM32F4_ADC_CCR,
+	.eoc_msk = { STM32F4_EOC1, STM32F4_EOC2, STM32F4_EOC3 },
+	.ovr_msk = { STM32F4_OVR1, STM32F4_OVR2, STM32F4_OVR3 },
+	.ier = STM32F4_ADC_CR1,
+	.eocie_msk = STM32F4_EOCIE,
+};
+
+/* STM32H7 common registers definitions */
+static const struct stm32_adc_common_regs stm32h7_adc_common_regs = {
+	.csr = STM32H7_ADC_CSR,
+	.ccr = STM32H7_ADC_CCR,
+	.eoc_msk = { STM32H7_EOC_MST, STM32H7_EOC_SLV },
+	.ovr_msk = { STM32H7_OVR_MST, STM32H7_OVR_SLV },
+	.ier = STM32H7_ADC_IER,
+	.eocie_msk = STM32H7_EOCIE,
+};
+
+/* STM32MP13 common registers definitions */
+static const struct stm32_adc_common_regs stm32mp13_adc_common_regs = {
+	.csr = STM32H7_ADC_CSR,
+	.ccr = STM32H7_ADC_CCR,
+	.eoc_msk = { STM32H7_EOC_MST },
+	.ovr_msk = { STM32H7_OVR_MST },
+	.ier = STM32H7_ADC_IER,
+	.eocie_msk = STM32H7_EOCIE,
+};
+
+static const unsigned int stm32_adc_offset[STM32_ADC_MAX_ADCS] = {
+	0, STM32_ADC_OFFSET, STM32_ADC_OFFSET * 2,
+};
+
+static unsigned int stm32_adc_eoc_enabled(struct stm32_adc_priv *priv,
+					  unsigned int adc)
+{
+	u32 ier, offset = stm32_adc_offset[adc];
+
+	ier = readl_relaxed(priv->common.base + offset + priv->cfg->regs->ier);
+
+	return ier & priv->cfg->regs->eocie_msk;
+}
+
+/* ADC common interrupt for all instances */
+static void stm32_adc_irq_handler(struct irq_desc *desc)
+{
+	struct stm32_adc_priv *priv = irq_desc_get_handler_data(desc);
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	int i;
+	u32 status;
+
+	chained_irq_enter(chip, desc);
+	status = readl_relaxed(priv->common.base + priv->cfg->regs->csr);
+
+	/*
+	 * End of conversion may be handled by using IRQ or DMA. There may be a
+	 * race here when two conversions complete at the same time on several
+	 * ADCs. EOC may be read 'set' for several ADCs, with:
+	 * - an ADC configured to use DMA (EOC triggers the DMA request, and
+	 *   is then automatically cleared by DR read in hardware)
+	 * - an ADC configured to use IRQs (EOCIE bit is set. The handler must
+	 *   be called in this case)
+	 * So both EOC status bit in CSR and EOCIE control bit must be checked
+	 * before invoking the interrupt handler (e.g. call ISR only for
+	 * IRQ-enabled ADCs).
+	 */
+	for (i = 0; i < priv->nb_adc_max; i++) {
+		if ((status & priv->cfg->regs->eoc_msk[i] &&
+		     stm32_adc_eoc_enabled(priv, i)) ||
+		     (status & priv->cfg->regs->ovr_msk[i]))
+			generic_handle_domain_irq(priv->domain, i);
+	}
+
+	chained_irq_exit(chip, desc);
+};
+
+static int stm32_adc_domain_map(struct irq_domain *d, unsigned int irq,
+				irq_hw_number_t hwirq)
+{
+	irq_set_chip_data(irq, d->host_data);
+	irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_level_irq);
+
+	return 0;
+}
+
+static void stm32_adc_domain_unmap(struct irq_domain *d, unsigned int irq)
+{
+	irq_set_chip_and_handler(irq, NULL, NULL);
+	irq_set_chip_data(irq, NULL);
+}
+
+static const struct irq_domain_ops stm32_adc_domain_ops = {
+	.map = stm32_adc_domain_map,
+	.unmap  = stm32_adc_domain_unmap,
+	.xlate = irq_domain_xlate_onecell,
+};
+
+static int stm32_adc_irq_probe(struct platform_device *pdev,
+			       struct stm32_adc_priv *priv)
+{
+	struct device_node *np = pdev->dev.of_node;
+	unsigned int i;
+
+	/*
+	 * Interrupt(s) must be provided, depending on the compatible:
+	 * - stm32f4/h7 shares a common interrupt line.
+	 * - stm32mp1, has one line per ADC
+	 */
+	for (i = 0; i < priv->cfg->num_irqs; i++) {
+		priv->irq[i] = platform_get_irq(pdev, i);
+		if (priv->irq[i] < 0)
+			return priv->irq[i];
+	}
+
+	priv->domain = irq_domain_add_simple(np, STM32_ADC_MAX_ADCS, 0,
+					     &stm32_adc_domain_ops,
+					     priv);
+	if (!priv->domain) {
+		dev_err(&pdev->dev, "Failed to add irq domain\n");
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < priv->cfg->num_irqs; i++) {
+		irq_set_chained_handler(priv->irq[i], stm32_adc_irq_handler);
+		irq_set_handler_data(priv->irq[i], priv);
+	}
+
+	return 0;
+}
+
+static void stm32_adc_irq_remove(struct platform_device *pdev,
+				 struct stm32_adc_priv *priv)
+{
+	int hwirq;
+	unsigned int i;
+
+	for (hwirq = 0; hwirq < priv->nb_adc_max; hwirq++)
+		irq_dispose_mapping(irq_find_mapping(priv->domain, hwirq));
+	irq_domain_remove(priv->domain);
+
+	for (i = 0; i < priv->cfg->num_irqs; i++)
+		irq_set_chained_handler(priv->irq[i], NULL);
+}
+
+static int stm32_adc_core_switches_supply_en(struct stm32_adc_priv *priv,
+					     struct device *dev)
+{
+	int ret;
+
+	/*
+	 * On STM32H7 and STM32MP1, the ADC inputs are multiplexed with analog
+	 * switches (via PCSEL) which have reduced performances when their
+	 * supply is below 2.7V (vdda by default):
+	 * - Voltage booster can be used, to get full ADC performances
+	 *   (increases power consumption).
+	 * - Vdd can be used to supply them, if above 2.7V (STM32MP1 only).
+	 *
+	 * Recommended settings for ANASWVDD and EN_BOOSTER:
+	 * - vdda < 2.7V but vdd > 2.7V: ANASWVDD = 1, EN_BOOSTER = 0 (stm32mp1)
+	 * - vdda < 2.7V and vdd < 2.7V: ANASWVDD = 0, EN_BOOSTER = 1
+	 * - vdda >= 2.7V:               ANASWVDD = 0, EN_BOOSTER = 0 (default)
+	 */
+	if (priv->vdda_uv < 2700000) {
+		if (priv->syscfg && priv->vdd_uv > 2700000) {
+			ret = regulator_enable(priv->vdd);
+			if (ret < 0) {
+				dev_err(dev, "vdd enable failed %d\n", ret);
+				return ret;
+			}
+
+			ret = regmap_write(priv->syscfg,
+					   STM32MP1_SYSCFG_PMCSETR,
+					   STM32MP1_SYSCFG_ANASWVDD_MASK);
+			if (ret < 0) {
+				regulator_disable(priv->vdd);
+				dev_err(dev, "vdd select failed, %d\n", ret);
+				return ret;
+			}
+			dev_dbg(dev, "analog switches supplied by vdd\n");
+
+			return 0;
+		}
+
+		if (priv->booster) {
+			/*
+			 * This is optional, as this is a trade-off between
+			 * analog performance and power consumption.
+			 */
+			ret = regulator_enable(priv->booster);
+			if (ret < 0) {
+				dev_err(dev, "booster enable failed %d\n", ret);
+				return ret;
+			}
+			dev_dbg(dev, "analog switches supplied by booster\n");
+
+			return 0;
+		}
+	}
+
+	/* Fallback using vdda (default), nothing to do */
+	dev_dbg(dev, "analog switches supplied by vdda (%d uV)\n",
+		priv->vdda_uv);
+
+	return 0;
+}
+
+static void stm32_adc_core_switches_supply_dis(struct stm32_adc_priv *priv)
+{
+	if (priv->vdda_uv < 2700000) {
+		if (priv->syscfg && priv->vdd_uv > 2700000) {
+			regmap_write(priv->syscfg, STM32MP1_SYSCFG_PMCCLRR,
+				     STM32MP1_SYSCFG_ANASWVDD_MASK);
+			regulator_disable(priv->vdd);
+			return;
+		}
+		if (priv->booster)
+			regulator_disable(priv->booster);
+	}
+}
+
+static int stm32_adc_core_hw_start(struct device *dev)
+{
+	struct stm32_adc_common *common = dev_get_drvdata(dev);
+	struct stm32_adc_priv *priv = to_stm32_adc_priv(common);
+	int ret;
+
+	ret = regulator_enable(priv->vdda);
+	if (ret < 0) {
+		dev_err(dev, "vdda enable failed %d\n", ret);
+		return ret;
+	}
+
+	ret = regulator_get_voltage(priv->vdda);
+	if (ret < 0) {
+		dev_err(dev, "vdda get voltage failed, %d\n", ret);
+		goto err_vdda_disable;
+	}
+	priv->vdda_uv = ret;
+
+	ret = stm32_adc_core_switches_supply_en(priv, dev);
+	if (ret < 0)
+		goto err_vdda_disable;
+
+	ret = regulator_enable(priv->vref);
+	if (ret < 0) {
+		dev_err(dev, "vref enable failed\n");
+		goto err_switches_dis;
+	}
+
+	ret = clk_prepare_enable(priv->bclk);
+	if (ret < 0) {
+		dev_err(dev, "bus clk enable failed\n");
+		goto err_regulator_disable;
+	}
+
+	ret = clk_prepare_enable(priv->aclk);
+	if (ret < 0) {
+		dev_err(dev, "adc clk enable failed\n");
+		goto err_bclk_disable;
+	}
+
+	writel_relaxed(priv->ccr_bak, priv->common.base + priv->cfg->regs->ccr);
+
+	return 0;
+
+err_bclk_disable:
+	clk_disable_unprepare(priv->bclk);
+err_regulator_disable:
+	regulator_disable(priv->vref);
+err_switches_dis:
+	stm32_adc_core_switches_supply_dis(priv);
+err_vdda_disable:
+	regulator_disable(priv->vdda);
+
+	return ret;
+}
+
+static void stm32_adc_core_hw_stop(struct device *dev)
+{
+	struct stm32_adc_common *common = dev_get_drvdata(dev);
+	struct stm32_adc_priv *priv = to_stm32_adc_priv(common);
+
+	/* Backup CCR that may be lost (depends on power state to achieve) */
+	priv->ccr_bak = readl_relaxed(priv->common.base + priv->cfg->regs->ccr);
+	clk_disable_unprepare(priv->aclk);
+	clk_disable_unprepare(priv->bclk);
+	regulator_disable(priv->vref);
+	stm32_adc_core_switches_supply_dis(priv);
+	regulator_disable(priv->vdda);
+}
+
+static int stm32_adc_core_switches_probe(struct device *dev,
+					 struct stm32_adc_priv *priv)
+{
+	struct device_node *np = dev->of_node;
+	int ret;
+
+	/* Analog switches supply can be controlled by syscfg (optional) */
+	priv->syscfg = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
+	if (IS_ERR(priv->syscfg)) {
+		ret = PTR_ERR(priv->syscfg);
+		if (ret != -ENODEV)
+			return dev_err_probe(dev, ret, "Can't probe syscfg\n");
+
+		priv->syscfg = NULL;
+	}
+
+	/* Booster can be used to supply analog switches (optional) */
+	if (priv->cfg->has_syscfg & HAS_VBOOSTER &&
+	    of_property_read_bool(np, "booster-supply")) {
+		priv->booster = devm_regulator_get_optional(dev, "booster");
+		if (IS_ERR(priv->booster)) {
+			ret = PTR_ERR(priv->booster);
+			if (ret != -ENODEV)
+				return dev_err_probe(dev, ret, "can't get booster\n");
+
+			priv->booster = NULL;
+		}
+	}
+
+	/* Vdd can be used to supply analog switches (optional) */
+	if (priv->cfg->has_syscfg & HAS_ANASWVDD &&
+	    of_property_read_bool(np, "vdd-supply")) {
+		priv->vdd = devm_regulator_get_optional(dev, "vdd");
+		if (IS_ERR(priv->vdd)) {
+			ret = PTR_ERR(priv->vdd);
+			if (ret != -ENODEV)
+				return dev_err_probe(dev, ret, "can't get vdd\n");
+
+			priv->vdd = NULL;
+		}
+	}
+
+	if (priv->vdd) {
+		ret = regulator_enable(priv->vdd);
+		if (ret < 0) {
+			dev_err(dev, "vdd enable failed %d\n", ret);
+			return ret;
+		}
+
+		ret = regulator_get_voltage(priv->vdd);
+		if (ret < 0) {
+			dev_err(dev, "vdd get voltage failed %d\n", ret);
+			regulator_disable(priv->vdd);
+			return ret;
+		}
+		priv->vdd_uv = ret;
+
+		regulator_disable(priv->vdd);
+	}
+
+	return 0;
+}
+
+static int stm32_adc_probe_identification(struct platform_device *pdev,
+					  struct stm32_adc_priv *priv)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct device_node *child;
+	const char *compat;
+	int ret, count = 0;
+	u32 id, val;
+
+	if (!priv->cfg->ipid)
+		return 0;
+
+	id = FIELD_GET(STM32MP1_IPIDR_MASK,
+		       readl_relaxed(priv->common.base + STM32MP1_ADC_IPDR));
+	if (id != priv->cfg->ipid) {
+		dev_err(&pdev->dev, "Unexpected IP version: 0x%x", id);
+		return -EINVAL;
+	}
+
+	for_each_child_of_node(np, child) {
+		ret = of_property_read_string(child, "compatible", &compat);
+		if (ret)
+			continue;
+		/* Count child nodes with stm32 adc compatible */
+		if (strstr(compat, "st,stm32") && strstr(compat, "adc"))
+			count++;
+	}
+
+	val = readl_relaxed(priv->common.base + STM32MP1_ADC_HWCFGR0);
+	priv->nb_adc_max = FIELD_GET(STM32MP1_ADCNUM_MASK, val);
+	if (count > priv->nb_adc_max) {
+		dev_err(&pdev->dev, "Unexpected child number: %d", count);
+		return -EINVAL;
+	}
+
+	val = readl_relaxed(priv->common.base + STM32MP1_ADC_VERR);
+	dev_dbg(&pdev->dev, "ADC version: %lu.%lu\n",
+		FIELD_GET(STM32MP1_MAJREV_MASK, val),
+		FIELD_GET(STM32MP1_MINREV_MASK, val));
+
+	return 0;
+}
+
+static int stm32_adc_probe(struct platform_device *pdev)
+{
+	struct stm32_adc_priv *priv;
+	struct device *dev = &pdev->dev;
+	struct device_node *np = pdev->dev.of_node;
+	struct resource *res;
+	u32 max_rate;
+	int ret;
+
+	if (!pdev->dev.of_node)
+		return -ENODEV;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+	platform_set_drvdata(pdev, &priv->common);
+
+	priv->cfg = (const struct stm32_adc_priv_cfg *)
+		of_match_device(dev->driver->of_match_table, dev)->data;
+	priv->nb_adc_max = priv->cfg->num_adcs;
+	spin_lock_init(&priv->common.lock);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	priv->common.base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(priv->common.base))
+		return PTR_ERR(priv->common.base);
+	priv->common.phys_base = res->start;
+
+	priv->vdda = devm_regulator_get(&pdev->dev, "vdda");
+	if (IS_ERR(priv->vdda))
+		return dev_err_probe(&pdev->dev, PTR_ERR(priv->vdda),
+				     "vdda get failed\n");
+
+	priv->vref = devm_regulator_get(&pdev->dev, "vref");
+	if (IS_ERR(priv->vref))
+		return dev_err_probe(&pdev->dev, PTR_ERR(priv->vref),
+				     "vref get failed\n");
+
+	priv->aclk = devm_clk_get_optional(&pdev->dev, "adc");
+	if (IS_ERR(priv->aclk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(priv->aclk),
+				     "Can't get 'adc' clock\n");
+
+	priv->bclk = devm_clk_get_optional(&pdev->dev, "bus");
+	if (IS_ERR(priv->bclk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(priv->bclk),
+				     "Can't get 'bus' clock\n");
+
+	ret = stm32_adc_core_switches_probe(dev, priv);
+	if (ret)
+		return ret;
+
+	pm_runtime_get_noresume(dev);
+	pm_runtime_set_active(dev);
+	pm_runtime_set_autosuspend_delay(dev, STM32_ADC_CORE_SLEEP_DELAY_MS);
+	pm_runtime_use_autosuspend(dev);
+	pm_runtime_enable(dev);
+
+	ret = stm32_adc_core_hw_start(dev);
+	if (ret)
+		goto err_pm_stop;
+
+	ret = stm32_adc_probe_identification(pdev, priv);
+	if (ret < 0)
+		goto err_hw_stop;
+
+	ret = regulator_get_voltage(priv->vref);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "vref get voltage failed, %d\n", ret);
+		goto err_hw_stop;
+	}
+	priv->common.vref_mv = ret / 1000;
+	dev_dbg(&pdev->dev, "vref+=%dmV\n", priv->common.vref_mv);
+
+	ret = of_property_read_u32(pdev->dev.of_node, "st,max-clk-rate-hz",
+				   &max_rate);
+	if (!ret)
+		priv->max_clk_rate = min(max_rate, priv->cfg->max_clk_rate_hz);
+	else
+		priv->max_clk_rate = priv->cfg->max_clk_rate_hz;
+
+	ret = priv->cfg->clk_sel(pdev, priv);
+	if (ret < 0)
+		goto err_hw_stop;
+
+	ret = stm32_adc_irq_probe(pdev, priv);
+	if (ret < 0)
+		goto err_hw_stop;
+
+	ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to populate DT children\n");
+		goto err_irq_remove;
+	}
+
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
+
+	return 0;
+
+err_irq_remove:
+	stm32_adc_irq_remove(pdev, priv);
+err_hw_stop:
+	stm32_adc_core_hw_stop(dev);
+err_pm_stop:
+	pm_runtime_disable(dev);
+	pm_runtime_set_suspended(dev);
+	pm_runtime_put_noidle(dev);
+
+	return ret;
+}
+
+static int stm32_adc_remove(struct platform_device *pdev)
+{
+	struct stm32_adc_common *common = platform_get_drvdata(pdev);
+	struct stm32_adc_priv *priv = to_stm32_adc_priv(common);
+
+	pm_runtime_get_sync(&pdev->dev);
+	of_platform_depopulate(&pdev->dev);
+	stm32_adc_irq_remove(pdev, priv);
+	stm32_adc_core_hw_stop(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+	pm_runtime_set_suspended(&pdev->dev);
+	pm_runtime_put_noidle(&pdev->dev);
+
+	return 0;
+}
+
+static int stm32_adc_core_runtime_suspend(struct device *dev)
+{
+	stm32_adc_core_hw_stop(dev);
+
+	return 0;
+}
+
+static int stm32_adc_core_runtime_resume(struct device *dev)
+{
+	return stm32_adc_core_hw_start(dev);
+}
+
+static int stm32_adc_core_runtime_idle(struct device *dev)
+{
+	pm_runtime_mark_last_busy(dev);
+
+	return 0;
+}
+
+static DEFINE_RUNTIME_DEV_PM_OPS(stm32_adc_core_pm_ops,
+				stm32_adc_core_runtime_suspend,
+				stm32_adc_core_runtime_resume,
+				stm32_adc_core_runtime_idle);
+
+static const struct stm32_adc_priv_cfg stm32f4_adc_priv_cfg = {
+	.regs = &stm32f4_adc_common_regs,
+	.clk_sel = stm32f4_adc_clk_sel,
+	.max_clk_rate_hz = 36000000,
+	.num_irqs = 1,
+	.num_adcs = 3,
+};
+
+static const struct stm32_adc_priv_cfg stm32h7_adc_priv_cfg = {
+	.regs = &stm32h7_adc_common_regs,
+	.clk_sel = stm32h7_adc_clk_sel,
+	.max_clk_rate_hz = 36000000,
+	.has_syscfg = HAS_VBOOSTER,
+	.num_irqs = 1,
+	.num_adcs = 2,
+};
+
+static const struct stm32_adc_priv_cfg stm32mp1_adc_priv_cfg = {
+	.regs = &stm32h7_adc_common_regs,
+	.clk_sel = stm32h7_adc_clk_sel,
+	.max_clk_rate_hz = 36000000,
+	.has_syscfg = HAS_VBOOSTER | HAS_ANASWVDD,
+	.ipid = STM32MP15_IPIDR_NUMBER,
+	.num_irqs = 2,
+};
+
+static const struct stm32_adc_priv_cfg stm32mp13_adc_priv_cfg = {
+	.regs = &stm32mp13_adc_common_regs,
+	.clk_sel = stm32h7_adc_clk_sel,
+	.max_clk_rate_hz = 75 * HZ_PER_MHZ,
+	.ipid = STM32MP13_IPIDR_NUMBER,
+	.num_irqs = 1,
+};
+
+static const struct of_device_id stm32_adc_of_match[] = {
+	{
+		.compatible = "st,stm32f4-adc-core",
+		.data = (void *)&stm32f4_adc_priv_cfg
+	}, {
+		.compatible = "st,stm32h7-adc-core",
+		.data = (void *)&stm32h7_adc_priv_cfg
+	}, {
+		.compatible = "st,stm32mp1-adc-core",
+		.data = (void *)&stm32mp1_adc_priv_cfg
+	}, {
+		.compatible = "st,stm32mp13-adc-core",
+		.data = (void *)&stm32mp13_adc_priv_cfg
+	}, {
+	},
+};
+MODULE_DEVICE_TABLE(of, stm32_adc_of_match);
+
+static struct platform_driver stm32_adc_driver = {
+	.probe = stm32_adc_probe,
+	.remove = stm32_adc_remove,
+	.driver = {
+		.name = "stm32-adc-core",
+		.of_match_table = stm32_adc_of_match,
+		.pm = pm_ptr(&stm32_adc_core_pm_ops),
+	},
+};
+module_platform_driver(stm32_adc_driver);
+
+MODULE_AUTHOR("Fabrice Gasnier <fabrice.gasnier@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics STM32 ADC core driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:stm32-adc-core");