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, 675 insertions, 0 deletions

diff --git a/drivers/phy/motorola/phy-mapphone-mdm6600.c b/drivers/phy/motorola/phy-mapphone-mdm6600.c
new file mode 100644
index 000000000..3cd4d51c2
--- /dev/null
+++ b/drivers/phy/motorola/phy-mapphone-mdm6600.c
@@ -0,0 +1,675 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Motorola Mapphone MDM6600 modem GPIO controlled USB PHY driver
+ * Copyright (C) 2018 Tony Lindgren <tony@atomide.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <linux/gpio/consumer.h>
+#include <linux/of_platform.h>
+#include <linux/phy/phy.h>
+#include <linux/pinctrl/consumer.h>
+
+#define PHY_MDM6600_PHY_DELAY_MS	4000	/* PHY enable 2.2s to 3.5s */
+#define PHY_MDM6600_ENABLED_DELAY_MS	8000	/* 8s more total for MDM6600 */
+#define PHY_MDM6600_WAKE_KICK_MS	600	/* time on after GPIO toggle */
+#define MDM6600_MODEM_IDLE_DELAY_MS	1000	/* modem after USB suspend */
+#define MDM6600_MODEM_WAKE_DELAY_MS	200	/* modem response after idle */
+
+enum phy_mdm6600_ctrl_lines {
+	PHY_MDM6600_ENABLE,			/* USB PHY enable */
+	PHY_MDM6600_POWER,			/* Device power */
+	PHY_MDM6600_RESET,			/* Device reset */
+	PHY_MDM6600_NR_CTRL_LINES,
+};
+
+enum phy_mdm6600_bootmode_lines {
+	PHY_MDM6600_MODE0,			/* out USB mode0 and OOB wake */
+	PHY_MDM6600_MODE1,			/* out USB mode1, in OOB wake */
+	PHY_MDM6600_NR_MODE_LINES,
+};
+
+enum phy_mdm6600_cmd_lines {
+	PHY_MDM6600_CMD0,
+	PHY_MDM6600_CMD1,
+	PHY_MDM6600_CMD2,
+	PHY_MDM6600_NR_CMD_LINES,
+};
+
+enum phy_mdm6600_status_lines {
+	PHY_MDM6600_STATUS0,
+	PHY_MDM6600_STATUS1,
+	PHY_MDM6600_STATUS2,
+	PHY_MDM6600_NR_STATUS_LINES,
+};
+
+/*
+ * MDM6600 command codes. These are based on Motorola Mapphone Linux
+ * kernel tree.
+ */
+enum phy_mdm6600_cmd {
+	PHY_MDM6600_CMD_BP_PANIC_ACK,
+	PHY_MDM6600_CMD_DATA_ONLY_BYPASS,	/* Reroute USB to CPCAP PHY */
+	PHY_MDM6600_CMD_FULL_BYPASS,		/* Reroute USB to CPCAP PHY */
+	PHY_MDM6600_CMD_NO_BYPASS,		/* Request normal USB mode */
+	PHY_MDM6600_CMD_BP_SHUTDOWN_REQ,	/* Request device power off */
+	PHY_MDM6600_CMD_BP_UNKNOWN_5,
+	PHY_MDM6600_CMD_BP_UNKNOWN_6,
+	PHY_MDM6600_CMD_UNDEFINED,
+};
+
+/*
+ * MDM6600 status codes. These are based on Motorola Mapphone Linux
+ * kernel tree.
+ */
+enum phy_mdm6600_status {
+	PHY_MDM6600_STATUS_PANIC,		/* Seems to be really off */
+	PHY_MDM6600_STATUS_PANIC_BUSY_WAIT,
+	PHY_MDM6600_STATUS_QC_DLOAD,
+	PHY_MDM6600_STATUS_RAM_DOWNLOADER,	/* MDM6600 USB flashing mode */
+	PHY_MDM6600_STATUS_PHONE_CODE_AWAKE,	/* MDM6600 normal USB mode */
+	PHY_MDM6600_STATUS_PHONE_CODE_ASLEEP,
+	PHY_MDM6600_STATUS_SHUTDOWN_ACK,
+	PHY_MDM6600_STATUS_UNDEFINED,
+};
+
+static const char * const
+phy_mdm6600_status_name[] = {
+	"off", "busy", "qc_dl", "ram_dl", "awake",
+	"asleep", "shutdown", "undefined",
+};
+
+struct phy_mdm6600 {
+	struct device *dev;
+	struct phy *generic_phy;
+	struct phy_provider *phy_provider;
+	struct gpio_desc *ctrl_gpios[PHY_MDM6600_NR_CTRL_LINES];
+	struct gpio_descs *mode_gpios;
+	struct gpio_descs *status_gpios;
+	struct gpio_descs *cmd_gpios;
+	struct delayed_work bootup_work;
+	struct delayed_work status_work;
+	struct delayed_work modem_wake_work;
+	struct completion ack;
+	bool enabled;				/* mdm6600 phy enabled */
+	bool running;				/* mdm6600 boot done */
+	bool awake;				/* mdm6600 respnds on n_gsm */
+	int status;
+};
+
+static int phy_mdm6600_init(struct phy *x)
+{
+	struct phy_mdm6600 *ddata = phy_get_drvdata(x);
+	struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE];
+
+	if (!ddata->enabled)
+		return -EPROBE_DEFER;
+
+	gpiod_set_value_cansleep(enable_gpio, 0);
+
+	return 0;
+}
+
+static int phy_mdm6600_power_on(struct phy *x)
+{
+	struct phy_mdm6600 *ddata = phy_get_drvdata(x);
+	struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE];
+	int error;
+
+	if (!ddata->enabled)
+		return -ENODEV;
+
+	error = pinctrl_pm_select_default_state(ddata->dev);
+	if (error)
+		dev_warn(ddata->dev, "%s: error with default_state: %i\n",
+			 __func__, error);
+
+	gpiod_set_value_cansleep(enable_gpio, 1);
+
+	/* Allow aggressive PM for USB, it's only needed for n_gsm port */
+	if (pm_runtime_enabled(&x->dev))
+		phy_pm_runtime_put(x);
+
+	return 0;
+}
+
+static int phy_mdm6600_power_off(struct phy *x)
+{
+	struct phy_mdm6600 *ddata = phy_get_drvdata(x);
+	struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE];
+	int error;
+
+	if (!ddata->enabled)
+		return -ENODEV;
+
+	/* Paired with phy_pm_runtime_put() in phy_mdm6600_power_on() */
+	if (pm_runtime_enabled(&x->dev)) {
+		error = phy_pm_runtime_get(x);
+		if (error < 0 && error != -EINPROGRESS)
+			dev_warn(ddata->dev, "%s: phy_pm_runtime_get: %i\n",
+				 __func__, error);
+	}
+
+	gpiod_set_value_cansleep(enable_gpio, 0);
+
+	error = pinctrl_pm_select_sleep_state(ddata->dev);
+	if (error)
+		dev_warn(ddata->dev, "%s: error with sleep_state: %i\n",
+			 __func__, error);
+
+	return 0;
+}
+
+static const struct phy_ops gpio_usb_ops = {
+	.init = phy_mdm6600_init,
+	.power_on = phy_mdm6600_power_on,
+	.power_off = phy_mdm6600_power_off,
+	.owner = THIS_MODULE,
+};
+
+/**
+ * phy_mdm6600_cmd() - send a command request to mdm6600
+ * @ddata: device driver data
+ * @val: value of cmd to be set
+ *
+ * Configures the three command request GPIOs to the specified value.
+ */
+static void phy_mdm6600_cmd(struct phy_mdm6600 *ddata, int val)
+{
+	DECLARE_BITMAP(values, PHY_MDM6600_NR_CMD_LINES);
+
+	values[0] = val;
+
+	gpiod_set_array_value_cansleep(PHY_MDM6600_NR_CMD_LINES,
+				       ddata->cmd_gpios->desc,
+				       ddata->cmd_gpios->info, values);
+}
+
+/**
+ * phy_mdm6600_status() - read mdm6600 status lines
+ * @work: work structure
+ */
+static void phy_mdm6600_status(struct work_struct *work)
+{
+	struct phy_mdm6600 *ddata;
+	struct device *dev;
+	DECLARE_BITMAP(values, PHY_MDM6600_NR_STATUS_LINES);
+	int error;
+
+	ddata = container_of(work, struct phy_mdm6600, status_work.work);
+	dev = ddata->dev;
+
+	error = gpiod_get_array_value_cansleep(PHY_MDM6600_NR_STATUS_LINES,
+					       ddata->status_gpios->desc,
+					       ddata->status_gpios->info,
+					       values);
+	if (error)
+		return;
+
+	ddata->status = values[0] & ((1 << PHY_MDM6600_NR_STATUS_LINES) - 1);
+
+	dev_info(dev, "modem status: %i %s\n",
+		 ddata->status,
+		 phy_mdm6600_status_name[ddata->status]);
+	complete(&ddata->ack);
+}
+
+static irqreturn_t phy_mdm6600_irq_thread(int irq, void *data)
+{
+	struct phy_mdm6600 *ddata = data;
+
+	schedule_delayed_work(&ddata->status_work, msecs_to_jiffies(10));
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * phy_mdm6600_wakeirq_thread - handle mode1 line OOB wake after booting
+ * @irq: interrupt
+ * @data: interrupt handler data
+ *
+ * GPIO mode1 is used initially as output to configure the USB boot
+ * mode for mdm6600. After booting it is used as input for OOB wake
+ * signal from mdm6600 to the SoC. Just use it for debug info only
+ * for now.
+ */
+static irqreturn_t phy_mdm6600_wakeirq_thread(int irq, void *data)
+{
+	struct phy_mdm6600 *ddata = data;
+	struct gpio_desc *mode_gpio1;
+	int error, wakeup;
+
+	mode_gpio1 = ddata->mode_gpios->desc[PHY_MDM6600_MODE1];
+	wakeup = gpiod_get_value(mode_gpio1);
+	if (!wakeup)
+		return IRQ_NONE;
+
+	dev_dbg(ddata->dev, "OOB wake on mode_gpio1: %i\n", wakeup);
+	error = pm_runtime_get_sync(ddata->dev);
+	if (error < 0) {
+		pm_runtime_put_noidle(ddata->dev);
+
+		return IRQ_NONE;
+	}
+
+	/* Just wake-up and kick the autosuspend timer */
+	pm_runtime_mark_last_busy(ddata->dev);
+	pm_runtime_put_autosuspend(ddata->dev);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * phy_mdm6600_init_irq() - initialize mdm6600 status IRQ lines
+ * @ddata: device driver data
+ */
+static void phy_mdm6600_init_irq(struct phy_mdm6600 *ddata)
+{
+	struct device *dev = ddata->dev;
+	int i, error, irq;
+
+	for (i = PHY_MDM6600_STATUS0;
+	     i <= PHY_MDM6600_STATUS2; i++) {
+		struct gpio_desc *gpio = ddata->status_gpios->desc[i];
+
+		irq = gpiod_to_irq(gpio);
+		if (irq <= 0)
+			continue;
+
+		error = devm_request_threaded_irq(dev, irq, NULL,
+					phy_mdm6600_irq_thread,
+					IRQF_TRIGGER_RISING |
+					IRQF_TRIGGER_FALLING |
+					IRQF_ONESHOT,
+					"mdm6600",
+					ddata);
+		if (error)
+			dev_warn(dev, "no modem status irq%i: %i\n",
+				 irq, error);
+	}
+}
+
+struct phy_mdm6600_map {
+	const char *name;
+	int direction;
+};
+
+static const struct phy_mdm6600_map
+phy_mdm6600_ctrl_gpio_map[PHY_MDM6600_NR_CTRL_LINES] = {
+	{ "enable", GPIOD_OUT_LOW, },		/* low = phy disabled */
+	{ "power", GPIOD_OUT_LOW, },		/* low = off */
+	{ "reset", GPIOD_OUT_HIGH, },		/* high = reset */
+};
+
+/**
+ * phy_mdm6600_init_lines() - initialize mdm6600 GPIO lines
+ * @ddata: device driver data
+ */
+static int phy_mdm6600_init_lines(struct phy_mdm6600 *ddata)
+{
+	struct device *dev = ddata->dev;
+	int i;
+
+	/* MDM6600 control lines */
+	for (i = 0; i < ARRAY_SIZE(phy_mdm6600_ctrl_gpio_map); i++) {
+		const struct phy_mdm6600_map *map =
+			&phy_mdm6600_ctrl_gpio_map[i];
+		struct gpio_desc **gpio = &ddata->ctrl_gpios[i];
+
+		*gpio = devm_gpiod_get(dev, map->name, map->direction);
+		if (IS_ERR(*gpio)) {
+			dev_info(dev, "gpio %s error %li\n",
+				 map->name, PTR_ERR(*gpio));
+			return PTR_ERR(*gpio);
+		}
+	}
+
+	/* MDM6600 USB start-up mode output lines */
+	ddata->mode_gpios = devm_gpiod_get_array(dev, "motorola,mode",
+						 GPIOD_OUT_LOW);
+	if (IS_ERR(ddata->mode_gpios))
+		return PTR_ERR(ddata->mode_gpios);
+
+	if (ddata->mode_gpios->ndescs != PHY_MDM6600_NR_MODE_LINES)
+		return -EINVAL;
+
+	/* MDM6600 status input lines */
+	ddata->status_gpios = devm_gpiod_get_array(dev, "motorola,status",
+						   GPIOD_IN);
+	if (IS_ERR(ddata->status_gpios))
+		return PTR_ERR(ddata->status_gpios);
+
+	if (ddata->status_gpios->ndescs != PHY_MDM6600_NR_STATUS_LINES)
+		return -EINVAL;
+
+	/* MDM6600 cmd output lines */
+	ddata->cmd_gpios = devm_gpiod_get_array(dev, "motorola,cmd",
+						GPIOD_OUT_LOW);
+	if (IS_ERR(ddata->cmd_gpios))
+		return PTR_ERR(ddata->cmd_gpios);
+
+	if (ddata->cmd_gpios->ndescs != PHY_MDM6600_NR_CMD_LINES)
+		return -EINVAL;
+
+	return 0;
+}
+
+/**
+ * phy_mdm6600_device_power_on() - power on mdm6600 device
+ * @ddata: device driver data
+ *
+ * To get the integrated USB phy in MDM6600 takes some hoops. We must ensure
+ * the shared USB bootmode GPIOs are configured, then request modem start-up,
+ * reset and power-up.. And then we need to recycle the shared USB bootmode
+ * GPIOs as they are also used for Out of Band (OOB) wake for the USB and
+ * TS 27.010 serial mux.
+ */
+static int phy_mdm6600_device_power_on(struct phy_mdm6600 *ddata)
+{
+	struct gpio_desc *mode_gpio0, *mode_gpio1, *reset_gpio, *power_gpio;
+	int error = 0, wakeirq;
+
+	mode_gpio0 = ddata->mode_gpios->desc[PHY_MDM6600_MODE0];
+	mode_gpio1 = ddata->mode_gpios->desc[PHY_MDM6600_MODE1];
+	reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET];
+	power_gpio = ddata->ctrl_gpios[PHY_MDM6600_POWER];
+
+	/*
+	 * Shared GPIOs must be low for normal USB mode. After booting
+	 * they are used for OOB wake signaling. These can be also used
+	 * to configure USB flashing mode later on based on a module
+	 * parameter.
+	 */
+	gpiod_set_value_cansleep(mode_gpio0, 0);
+	gpiod_set_value_cansleep(mode_gpio1, 0);
+
+	/* Request start-up mode */
+	phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_NO_BYPASS);
+
+	/* Request a reset first */
+	gpiod_set_value_cansleep(reset_gpio, 0);
+	msleep(100);
+
+	/* Toggle power GPIO to request mdm6600 to start */
+	gpiod_set_value_cansleep(power_gpio, 1);
+	msleep(100);
+	gpiod_set_value_cansleep(power_gpio, 0);
+
+	/*
+	 * Looks like the USB PHY needs between 2.2 to 4 seconds.
+	 * If we try to use it before that, we will get L3 errors
+	 * from omap-usb-host trying to access the PHY. See also
+	 * phy_mdm6600_init() for -EPROBE_DEFER.
+	 */
+	msleep(PHY_MDM6600_PHY_DELAY_MS);
+	ddata->enabled = true;
+
+	/* Booting up the rest of MDM6600 will take total about 8 seconds */
+	dev_info(ddata->dev, "Waiting for power up request to complete..\n");
+	if (wait_for_completion_timeout(&ddata->ack,
+			msecs_to_jiffies(PHY_MDM6600_ENABLED_DELAY_MS))) {
+		if (ddata->status > PHY_MDM6600_STATUS_PANIC &&
+		    ddata->status < PHY_MDM6600_STATUS_SHUTDOWN_ACK)
+			dev_info(ddata->dev, "Powered up OK\n");
+	} else {
+		ddata->enabled = false;
+		error = -ETIMEDOUT;
+		dev_err(ddata->dev, "Timed out powering up\n");
+	}
+
+	/* Reconfigure mode1 GPIO as input for OOB wake */
+	gpiod_direction_input(mode_gpio1);
+
+	wakeirq = gpiod_to_irq(mode_gpio1);
+	if (wakeirq <= 0)
+		return wakeirq;
+
+	error = devm_request_threaded_irq(ddata->dev, wakeirq, NULL,
+					  phy_mdm6600_wakeirq_thread,
+					  IRQF_TRIGGER_RISING |
+					  IRQF_TRIGGER_FALLING |
+					  IRQF_ONESHOT,
+					  "mdm6600-wake",
+					  ddata);
+	if (error)
+		dev_warn(ddata->dev, "no modem wakeirq irq%i: %i\n",
+			 wakeirq, error);
+
+	ddata->running = true;
+
+	return error;
+}
+
+/**
+ * phy_mdm6600_device_power_off() - power off mdm6600 device
+ * @ddata: device driver data
+ */
+static void phy_mdm6600_device_power_off(struct phy_mdm6600 *ddata)
+{
+	struct gpio_desc *reset_gpio =
+		ddata->ctrl_gpios[PHY_MDM6600_RESET];
+
+	ddata->enabled = false;
+	phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_BP_SHUTDOWN_REQ);
+	msleep(100);
+
+	gpiod_set_value_cansleep(reset_gpio, 1);
+
+	dev_info(ddata->dev, "Waiting for power down request to complete.. ");
+	if (wait_for_completion_timeout(&ddata->ack,
+					msecs_to_jiffies(5000))) {
+		if (ddata->status == PHY_MDM6600_STATUS_PANIC)
+			dev_info(ddata->dev, "Powered down OK\n");
+	} else {
+		dev_err(ddata->dev, "Timed out powering down\n");
+	}
+}
+
+static void phy_mdm6600_deferred_power_on(struct work_struct *work)
+{
+	struct phy_mdm6600 *ddata;
+	int error;
+
+	ddata = container_of(work, struct phy_mdm6600, bootup_work.work);
+
+	error = phy_mdm6600_device_power_on(ddata);
+	if (error)
+		dev_err(ddata->dev, "Device not functional\n");
+}
+
+/*
+ * USB suspend puts mdm6600 into low power mode. For any n_gsm using apps,
+ * we need to keep the modem awake by kicking it's mode0 GPIO. This will
+ * keep the modem awake for about 1.2 seconds. When no n_gsm apps are using
+ * the modem, runtime PM auto mode can be enabled so modem can enter low
+ * power mode.
+ */
+static void phy_mdm6600_wake_modem(struct phy_mdm6600 *ddata)
+{
+	struct gpio_desc *mode_gpio0;
+
+	mode_gpio0 = ddata->mode_gpios->desc[PHY_MDM6600_MODE0];
+	gpiod_set_value_cansleep(mode_gpio0, 1);
+	usleep_range(5, 15);
+	gpiod_set_value_cansleep(mode_gpio0, 0);
+	if (ddata->awake)
+		usleep_range(5, 15);
+	else
+		msleep(MDM6600_MODEM_WAKE_DELAY_MS);
+}
+
+static void phy_mdm6600_modem_wake(struct work_struct *work)
+{
+	struct phy_mdm6600 *ddata;
+
+	ddata = container_of(work, struct phy_mdm6600, modem_wake_work.work);
+	phy_mdm6600_wake_modem(ddata);
+
+	/*
+	 * The modem does not always stay awake 1.2 seconds after toggling
+	 * the wake GPIO, and sometimes it idles after about some 600 ms
+	 * making writes time out.
+	 */
+	schedule_delayed_work(&ddata->modem_wake_work,
+			      msecs_to_jiffies(PHY_MDM6600_WAKE_KICK_MS));
+}
+
+static int __maybe_unused phy_mdm6600_runtime_suspend(struct device *dev)
+{
+	struct phy_mdm6600 *ddata = dev_get_drvdata(dev);
+
+	cancel_delayed_work_sync(&ddata->modem_wake_work);
+	ddata->awake = false;
+
+	return 0;
+}
+
+static int __maybe_unused phy_mdm6600_runtime_resume(struct device *dev)
+{
+	struct phy_mdm6600 *ddata = dev_get_drvdata(dev);
+
+	phy_mdm6600_modem_wake(&ddata->modem_wake_work.work);
+	ddata->awake = true;
+
+	return 0;
+}
+
+static const struct dev_pm_ops phy_mdm6600_pm_ops = {
+	SET_RUNTIME_PM_OPS(phy_mdm6600_runtime_suspend,
+			   phy_mdm6600_runtime_resume, NULL)
+};
+
+static const struct of_device_id phy_mdm6600_id_table[] = {
+	{ .compatible = "motorola,mapphone-mdm6600", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, phy_mdm6600_id_table);
+
+static int phy_mdm6600_probe(struct platform_device *pdev)
+{
+	struct phy_mdm6600 *ddata;
+	int error;
+
+	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
+	if (!ddata)
+		return -ENOMEM;
+
+	INIT_DELAYED_WORK(&ddata->bootup_work,
+			  phy_mdm6600_deferred_power_on);
+	INIT_DELAYED_WORK(&ddata->status_work, phy_mdm6600_status);
+	INIT_DELAYED_WORK(&ddata->modem_wake_work, phy_mdm6600_modem_wake);
+	init_completion(&ddata->ack);
+
+	ddata->dev = &pdev->dev;
+	platform_set_drvdata(pdev, ddata);
+
+	/* Active state selected in phy_mdm6600_power_on() */
+	error = pinctrl_pm_select_sleep_state(ddata->dev);
+	if (error)
+		dev_warn(ddata->dev, "%s: error with sleep_state: %i\n",
+			 __func__, error);
+
+	error = phy_mdm6600_init_lines(ddata);
+	if (error)
+		return error;
+
+	phy_mdm6600_init_irq(ddata);
+	schedule_delayed_work(&ddata->bootup_work, 0);
+
+	/*
+	 * See phy_mdm6600_device_power_on(). We should be able
+	 * to remove this eventually when ohci-platform can deal
+	 * with -EPROBE_DEFER.
+	 */
+	msleep(PHY_MDM6600_PHY_DELAY_MS + 500);
+
+	/*
+	 * Enable PM runtime only after PHY has been powered up properly.
+	 * It is currently only needed after USB suspends mdm6600 and n_gsm
+	 * needs to access the device. We don't want to do this earlier as
+	 * gpio mode0 pin doubles as mdm6600 wake-up gpio.
+	 */
+	pm_runtime_use_autosuspend(ddata->dev);
+	pm_runtime_set_autosuspend_delay(ddata->dev,
+					 MDM6600_MODEM_IDLE_DELAY_MS);
+	pm_runtime_enable(ddata->dev);
+	error = pm_runtime_get_sync(ddata->dev);
+	if (error < 0) {
+		dev_warn(ddata->dev, "failed to wake modem: %i\n", error);
+		pm_runtime_put_noidle(ddata->dev);
+		goto cleanup;
+	}
+
+	ddata->generic_phy = devm_phy_create(ddata->dev, NULL, &gpio_usb_ops);
+	if (IS_ERR(ddata->generic_phy)) {
+		error = PTR_ERR(ddata->generic_phy);
+		goto idle;
+	}
+
+	phy_set_drvdata(ddata->generic_phy, ddata);
+
+	ddata->phy_provider =
+		devm_of_phy_provider_register(ddata->dev,
+					      of_phy_simple_xlate);
+	if (IS_ERR(ddata->phy_provider))
+		error = PTR_ERR(ddata->phy_provider);
+
+idle:
+	pm_runtime_mark_last_busy(ddata->dev);
+	pm_runtime_put_autosuspend(ddata->dev);
+
+cleanup:
+	if (error < 0)
+		phy_mdm6600_device_power_off(ddata);
+	pm_runtime_disable(ddata->dev);
+	pm_runtime_dont_use_autosuspend(ddata->dev);
+	return error;
+}
+
+static int phy_mdm6600_remove(struct platform_device *pdev)
+{
+	struct phy_mdm6600 *ddata = platform_get_drvdata(pdev);
+	struct gpio_desc *reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET];
+
+	pm_runtime_dont_use_autosuspend(ddata->dev);
+	pm_runtime_put_sync(ddata->dev);
+	pm_runtime_disable(ddata->dev);
+
+	if (!ddata->running)
+		wait_for_completion_timeout(&ddata->ack,
+			msecs_to_jiffies(PHY_MDM6600_ENABLED_DELAY_MS));
+
+	gpiod_set_value_cansleep(reset_gpio, 1);
+	phy_mdm6600_device_power_off(ddata);
+
+	cancel_delayed_work_sync(&ddata->modem_wake_work);
+	cancel_delayed_work_sync(&ddata->bootup_work);
+	cancel_delayed_work_sync(&ddata->status_work);
+
+	return 0;
+}
+
+static struct platform_driver phy_mdm6600_driver = {
+	.probe = phy_mdm6600_probe,
+	.remove = phy_mdm6600_remove,
+	.driver = {
+		.name = "phy-mapphone-mdm6600",
+		.pm = &phy_mdm6600_pm_ops,
+		.of_match_table = of_match_ptr(phy_mdm6600_id_table),
+	},
+};
+
+module_platform_driver(phy_mdm6600_driver);
+
+MODULE_ALIAS("platform:gpio_usb");
+MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
+MODULE_DESCRIPTION("mdm6600 gpio usb phy driver");
+MODULE_LICENSE("GPL v2");