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, 720 insertions, 0 deletions

diff --git a/drivers/soc/bcm/bcm2835-power.c b/drivers/soc/bcm/bcm2835-power.c
new file mode 100644
index 000000000..5bcd04776
--- /dev/null
+++ b/drivers/soc/bcm/bcm2835-power.c
@@ -0,0 +1,720 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Power domain driver for Broadcom BCM2835
+ *
+ * Copyright (C) 2018 Broadcom
+ */
+
+#include <dt-bindings/soc/bcm2835-pm.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/mfd/bcm2835-pm.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/reset-controller.h>
+#include <linux/types.h>
+
+#define PM_GNRIC                        0x00
+#define PM_AUDIO                        0x04
+#define PM_STATUS                       0x18
+#define PM_RSTC				0x1c
+#define PM_RSTS				0x20
+#define PM_WDOG				0x24
+#define PM_PADS0			0x28
+#define PM_PADS2			0x2c
+#define PM_PADS3			0x30
+#define PM_PADS4			0x34
+#define PM_PADS5			0x38
+#define PM_PADS6			0x3c
+#define PM_CAM0				0x44
+#define PM_CAM0_LDOHPEN			BIT(2)
+#define PM_CAM0_LDOLPEN			BIT(1)
+#define PM_CAM0_CTRLEN			BIT(0)
+
+#define PM_CAM1				0x48
+#define PM_CAM1_LDOHPEN			BIT(2)
+#define PM_CAM1_LDOLPEN			BIT(1)
+#define PM_CAM1_CTRLEN			BIT(0)
+
+#define PM_CCP2TX			0x4c
+#define PM_CCP2TX_LDOEN			BIT(1)
+#define PM_CCP2TX_CTRLEN		BIT(0)
+
+#define PM_DSI0				0x50
+#define PM_DSI0_LDOHPEN			BIT(2)
+#define PM_DSI0_LDOLPEN			BIT(1)
+#define PM_DSI0_CTRLEN			BIT(0)
+
+#define PM_DSI1				0x54
+#define PM_DSI1_LDOHPEN			BIT(2)
+#define PM_DSI1_LDOLPEN			BIT(1)
+#define PM_DSI1_CTRLEN			BIT(0)
+
+#define PM_HDMI				0x58
+#define PM_HDMI_RSTDR			BIT(19)
+#define PM_HDMI_LDOPD			BIT(1)
+#define PM_HDMI_CTRLEN			BIT(0)
+
+#define PM_USB				0x5c
+/* The power gates must be enabled with this bit before enabling the LDO in the
+ * USB block.
+ */
+#define PM_USB_CTRLEN			BIT(0)
+
+#define PM_PXLDO			0x60
+#define PM_PXBG				0x64
+#define PM_DFT				0x68
+#define PM_SMPS				0x6c
+#define PM_XOSC				0x70
+#define PM_SPAREW			0x74
+#define PM_SPARER			0x78
+#define PM_AVS_RSTDR			0x7c
+#define PM_AVS_STAT			0x80
+#define PM_AVS_EVENT			0x84
+#define PM_AVS_INTEN			0x88
+#define PM_DUMMY			0xfc
+
+#define PM_IMAGE			0x108
+#define PM_GRAFX			0x10c
+#define PM_PROC				0x110
+#define PM_ENAB				BIT(12)
+#define PM_ISPRSTN			BIT(8)
+#define PM_H264RSTN			BIT(7)
+#define PM_PERIRSTN			BIT(6)
+#define PM_V3DRSTN			BIT(6)
+#define PM_ISFUNC			BIT(5)
+#define PM_MRDONE			BIT(4)
+#define PM_MEMREP			BIT(3)
+#define PM_ISPOW			BIT(2)
+#define PM_POWOK			BIT(1)
+#define PM_POWUP			BIT(0)
+#define PM_INRUSH_SHIFT			13
+#define PM_INRUSH_3_5_MA		0
+#define PM_INRUSH_5_MA			1
+#define PM_INRUSH_10_MA			2
+#define PM_INRUSH_20_MA			3
+#define PM_INRUSH_MASK			(3 << PM_INRUSH_SHIFT)
+
+#define PM_PASSWORD			0x5a000000
+
+#define PM_WDOG_TIME_SET		0x000fffff
+#define PM_RSTC_WRCFG_CLR		0xffffffcf
+#define PM_RSTS_HADWRH_SET		0x00000040
+#define PM_RSTC_WRCFG_SET		0x00000030
+#define PM_RSTC_WRCFG_FULL_RESET	0x00000020
+#define PM_RSTC_RESET			0x00000102
+
+#define PM_READ(reg) readl(power->base + (reg))
+#define PM_WRITE(reg, val) writel(PM_PASSWORD | (val), power->base + (reg))
+
+#define ASB_BRDG_VERSION                0x00
+#define ASB_CPR_CTRL                    0x04
+
+#define ASB_V3D_S_CTRL			0x08
+#define ASB_V3D_M_CTRL			0x0c
+#define ASB_ISP_S_CTRL			0x10
+#define ASB_ISP_M_CTRL			0x14
+#define ASB_H264_S_CTRL			0x18
+#define ASB_H264_M_CTRL			0x1c
+
+#define ASB_REQ_STOP                    BIT(0)
+#define ASB_ACK                         BIT(1)
+#define ASB_EMPTY                       BIT(2)
+#define ASB_FULL                        BIT(3)
+
+#define ASB_AXI_BRDG_ID			0x20
+
+#define BCM2835_BRDG_ID			0x62726467
+
+struct bcm2835_power_domain {
+	struct generic_pm_domain base;
+	struct bcm2835_power *power;
+	u32 domain;
+	struct clk *clk;
+};
+
+struct bcm2835_power {
+	struct device		*dev;
+	/* PM registers. */
+	void __iomem		*base;
+	/* AXI Async bridge registers. */
+	void __iomem		*asb;
+	/* RPiVid bridge registers. */
+	void __iomem		*rpivid_asb;
+
+	struct genpd_onecell_data pd_xlate;
+	struct bcm2835_power_domain domains[BCM2835_POWER_DOMAIN_COUNT];
+	struct reset_controller_dev reset;
+};
+
+static int bcm2835_asb_control(struct bcm2835_power *power, u32 reg, bool enable)
+{
+	void __iomem *base = power->asb;
+	u64 start;
+	u32 val;
+
+	switch (reg) {
+	case 0:
+		return 0;
+	case ASB_V3D_S_CTRL:
+	case ASB_V3D_M_CTRL:
+		if (power->rpivid_asb)
+			base = power->rpivid_asb;
+		break;
+	}
+
+	start = ktime_get_ns();
+
+	/* Enable the module's async AXI bridges. */
+	if (enable) {
+		val = readl(base + reg) & ~ASB_REQ_STOP;
+	} else {
+		val = readl(base + reg) | ASB_REQ_STOP;
+	}
+	writel(PM_PASSWORD | val, base + reg);
+
+	while (readl(base + reg) & ASB_ACK) {
+		cpu_relax();
+		if (ktime_get_ns() - start >= 1000)
+			return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+static int bcm2835_asb_enable(struct bcm2835_power *power, u32 reg)
+{
+	return bcm2835_asb_control(power, reg, true);
+}
+
+static int bcm2835_asb_disable(struct bcm2835_power *power, u32 reg)
+{
+	return bcm2835_asb_control(power, reg, false);
+}
+
+static int bcm2835_power_power_off(struct bcm2835_power_domain *pd, u32 pm_reg)
+{
+	struct bcm2835_power *power = pd->power;
+
+	/* We don't run this on BCM2711 */
+	if (power->rpivid_asb)
+		return 0;
+
+	/* Enable functional isolation */
+	PM_WRITE(pm_reg, PM_READ(pm_reg) & ~PM_ISFUNC);
+
+	/* Enable electrical isolation */
+	PM_WRITE(pm_reg, PM_READ(pm_reg) & ~PM_ISPOW);
+
+	/* Open the power switches. */
+	PM_WRITE(pm_reg, PM_READ(pm_reg) & ~PM_POWUP);
+
+	return 0;
+}
+
+static int bcm2835_power_power_on(struct bcm2835_power_domain *pd, u32 pm_reg)
+{
+	struct bcm2835_power *power = pd->power;
+	struct device *dev = power->dev;
+	u64 start;
+	int ret;
+	int inrush;
+	bool powok;
+
+	/* We don't run this on BCM2711 */
+	if (power->rpivid_asb)
+		return 0;
+
+	/* If it was already powered on by the fw, leave it that way. */
+	if (PM_READ(pm_reg) & PM_POWUP)
+		return 0;
+
+	/* Enable power.  Allowing too much current at once may result
+	 * in POWOK never getting set, so start low and ramp it up as
+	 * necessary to succeed.
+	 */
+	powok = false;
+	for (inrush = PM_INRUSH_3_5_MA; inrush <= PM_INRUSH_20_MA; inrush++) {
+		PM_WRITE(pm_reg,
+			 (PM_READ(pm_reg) & ~PM_INRUSH_MASK) |
+			 (inrush << PM_INRUSH_SHIFT) |
+			 PM_POWUP);
+
+		start = ktime_get_ns();
+		while (!(powok = !!(PM_READ(pm_reg) & PM_POWOK))) {
+			cpu_relax();
+			if (ktime_get_ns() - start >= 3000)
+				break;
+		}
+	}
+	if (!powok) {
+		dev_err(dev, "Timeout waiting for %s power OK\n",
+			pd->base.name);
+		ret = -ETIMEDOUT;
+		goto err_disable_powup;
+	}
+
+	/* Disable electrical isolation */
+	PM_WRITE(pm_reg, PM_READ(pm_reg) | PM_ISPOW);
+
+	/* Repair memory */
+	PM_WRITE(pm_reg, PM_READ(pm_reg) | PM_MEMREP);
+	start = ktime_get_ns();
+	while (!(PM_READ(pm_reg) & PM_MRDONE)) {
+		cpu_relax();
+		if (ktime_get_ns() - start >= 1000) {
+			dev_err(dev, "Timeout waiting for %s memory repair\n",
+				pd->base.name);
+			ret = -ETIMEDOUT;
+			goto err_disable_ispow;
+		}
+	}
+
+	/* Disable functional isolation */
+	PM_WRITE(pm_reg, PM_READ(pm_reg) | PM_ISFUNC);
+
+	return 0;
+
+err_disable_ispow:
+	PM_WRITE(pm_reg, PM_READ(pm_reg) & ~PM_ISPOW);
+err_disable_powup:
+	PM_WRITE(pm_reg, PM_READ(pm_reg) & ~(PM_POWUP | PM_INRUSH_MASK));
+	return ret;
+}
+
+static int bcm2835_asb_power_on(struct bcm2835_power_domain *pd,
+				u32 pm_reg,
+				u32 asb_m_reg,
+				u32 asb_s_reg,
+				u32 reset_flags)
+{
+	struct bcm2835_power *power = pd->power;
+	int ret;
+
+	ret = clk_prepare_enable(pd->clk);
+	if (ret) {
+		dev_err(power->dev, "Failed to enable clock for %s\n",
+			pd->base.name);
+		return ret;
+	}
+
+	/* Wait 32 clocks for reset to propagate, 1 us will be enough */
+	udelay(1);
+
+	clk_disable_unprepare(pd->clk);
+
+	/* Deassert the resets. */
+	PM_WRITE(pm_reg, PM_READ(pm_reg) | reset_flags);
+
+	ret = clk_prepare_enable(pd->clk);
+	if (ret) {
+		dev_err(power->dev, "Failed to enable clock for %s\n",
+			pd->base.name);
+		goto err_enable_resets;
+	}
+
+	ret = bcm2835_asb_enable(power, asb_m_reg);
+	if (ret) {
+		dev_err(power->dev, "Failed to enable ASB master for %s\n",
+			pd->base.name);
+		goto err_disable_clk;
+	}
+	ret = bcm2835_asb_enable(power, asb_s_reg);
+	if (ret) {
+		dev_err(power->dev, "Failed to enable ASB slave for %s\n",
+			pd->base.name);
+		goto err_disable_asb_master;
+	}
+
+	return 0;
+
+err_disable_asb_master:
+	bcm2835_asb_disable(power, asb_m_reg);
+err_disable_clk:
+	clk_disable_unprepare(pd->clk);
+err_enable_resets:
+	PM_WRITE(pm_reg, PM_READ(pm_reg) & ~reset_flags);
+	return ret;
+}
+
+static int bcm2835_asb_power_off(struct bcm2835_power_domain *pd,
+				 u32 pm_reg,
+				 u32 asb_m_reg,
+				 u32 asb_s_reg,
+				 u32 reset_flags)
+{
+	struct bcm2835_power *power = pd->power;
+	int ret;
+
+	ret = bcm2835_asb_disable(power, asb_s_reg);
+	if (ret) {
+		dev_warn(power->dev, "Failed to disable ASB slave for %s\n",
+			 pd->base.name);
+		return ret;
+	}
+	ret = bcm2835_asb_disable(power, asb_m_reg);
+	if (ret) {
+		dev_warn(power->dev, "Failed to disable ASB master for %s\n",
+			 pd->base.name);
+		bcm2835_asb_enable(power, asb_s_reg);
+		return ret;
+	}
+
+	clk_disable_unprepare(pd->clk);
+
+	/* Assert the resets. */
+	PM_WRITE(pm_reg, PM_READ(pm_reg) & ~reset_flags);
+
+	return 0;
+}
+
+static int bcm2835_power_pd_power_on(struct generic_pm_domain *domain)
+{
+	struct bcm2835_power_domain *pd =
+		container_of(domain, struct bcm2835_power_domain, base);
+	struct bcm2835_power *power = pd->power;
+
+	switch (pd->domain) {
+	case BCM2835_POWER_DOMAIN_GRAFX:
+		return bcm2835_power_power_on(pd, PM_GRAFX);
+
+	case BCM2835_POWER_DOMAIN_GRAFX_V3D:
+		return bcm2835_asb_power_on(pd, PM_GRAFX,
+					    ASB_V3D_M_CTRL, ASB_V3D_S_CTRL,
+					    PM_V3DRSTN);
+
+	case BCM2835_POWER_DOMAIN_IMAGE:
+		return bcm2835_power_power_on(pd, PM_IMAGE);
+
+	case BCM2835_POWER_DOMAIN_IMAGE_PERI:
+		return bcm2835_asb_power_on(pd, PM_IMAGE,
+					    0, 0,
+					    PM_PERIRSTN);
+
+	case BCM2835_POWER_DOMAIN_IMAGE_ISP:
+		return bcm2835_asb_power_on(pd, PM_IMAGE,
+					    ASB_ISP_M_CTRL, ASB_ISP_S_CTRL,
+					    PM_ISPRSTN);
+
+	case BCM2835_POWER_DOMAIN_IMAGE_H264:
+		return bcm2835_asb_power_on(pd, PM_IMAGE,
+					    ASB_H264_M_CTRL, ASB_H264_S_CTRL,
+					    PM_H264RSTN);
+
+	case BCM2835_POWER_DOMAIN_USB:
+		PM_WRITE(PM_USB, PM_USB_CTRLEN);
+		return 0;
+
+	case BCM2835_POWER_DOMAIN_DSI0:
+		PM_WRITE(PM_DSI0, PM_DSI0_CTRLEN);
+		PM_WRITE(PM_DSI0, PM_DSI0_CTRLEN | PM_DSI0_LDOHPEN);
+		return 0;
+
+	case BCM2835_POWER_DOMAIN_DSI1:
+		PM_WRITE(PM_DSI1, PM_DSI1_CTRLEN);
+		PM_WRITE(PM_DSI1, PM_DSI1_CTRLEN | PM_DSI1_LDOHPEN);
+		return 0;
+
+	case BCM2835_POWER_DOMAIN_CCP2TX:
+		PM_WRITE(PM_CCP2TX, PM_CCP2TX_CTRLEN);
+		PM_WRITE(PM_CCP2TX, PM_CCP2TX_CTRLEN | PM_CCP2TX_LDOEN);
+		return 0;
+
+	case BCM2835_POWER_DOMAIN_HDMI:
+		PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) | PM_HDMI_RSTDR);
+		PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) | PM_HDMI_CTRLEN);
+		PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) & ~PM_HDMI_LDOPD);
+		usleep_range(100, 200);
+		PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) & ~PM_HDMI_RSTDR);
+		return 0;
+
+	default:
+		dev_err(power->dev, "Invalid domain %d\n", pd->domain);
+		return -EINVAL;
+	}
+}
+
+static int bcm2835_power_pd_power_off(struct generic_pm_domain *domain)
+{
+	struct bcm2835_power_domain *pd =
+		container_of(domain, struct bcm2835_power_domain, base);
+	struct bcm2835_power *power = pd->power;
+
+	switch (pd->domain) {
+	case BCM2835_POWER_DOMAIN_GRAFX:
+		return bcm2835_power_power_off(pd, PM_GRAFX);
+
+	case BCM2835_POWER_DOMAIN_GRAFX_V3D:
+		return bcm2835_asb_power_off(pd, PM_GRAFX,
+					     ASB_V3D_M_CTRL, ASB_V3D_S_CTRL,
+					     PM_V3DRSTN);
+
+	case BCM2835_POWER_DOMAIN_IMAGE:
+		return bcm2835_power_power_off(pd, PM_IMAGE);
+
+	case BCM2835_POWER_DOMAIN_IMAGE_PERI:
+		return bcm2835_asb_power_off(pd, PM_IMAGE,
+					     0, 0,
+					     PM_PERIRSTN);
+
+	case BCM2835_POWER_DOMAIN_IMAGE_ISP:
+		return bcm2835_asb_power_off(pd, PM_IMAGE,
+					     ASB_ISP_M_CTRL, ASB_ISP_S_CTRL,
+					     PM_ISPRSTN);
+
+	case BCM2835_POWER_DOMAIN_IMAGE_H264:
+		return bcm2835_asb_power_off(pd, PM_IMAGE,
+					     ASB_H264_M_CTRL, ASB_H264_S_CTRL,
+					     PM_H264RSTN);
+
+	case BCM2835_POWER_DOMAIN_USB:
+		PM_WRITE(PM_USB, 0);
+		return 0;
+
+	case BCM2835_POWER_DOMAIN_DSI0:
+		PM_WRITE(PM_DSI0, PM_DSI0_CTRLEN);
+		PM_WRITE(PM_DSI0, 0);
+		return 0;
+
+	case BCM2835_POWER_DOMAIN_DSI1:
+		PM_WRITE(PM_DSI1, PM_DSI1_CTRLEN);
+		PM_WRITE(PM_DSI1, 0);
+		return 0;
+
+	case BCM2835_POWER_DOMAIN_CCP2TX:
+		PM_WRITE(PM_CCP2TX, PM_CCP2TX_CTRLEN);
+		PM_WRITE(PM_CCP2TX, 0);
+		return 0;
+
+	case BCM2835_POWER_DOMAIN_HDMI:
+		PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) | PM_HDMI_LDOPD);
+		PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) & ~PM_HDMI_CTRLEN);
+		return 0;
+
+	default:
+		dev_err(power->dev, "Invalid domain %d\n", pd->domain);
+		return -EINVAL;
+	}
+}
+
+static int
+bcm2835_init_power_domain(struct bcm2835_power *power,
+			  int pd_xlate_index, const char *name)
+{
+	struct device *dev = power->dev;
+	struct bcm2835_power_domain *dom = &power->domains[pd_xlate_index];
+
+	dom->clk = devm_clk_get(dev->parent, name);
+	if (IS_ERR(dom->clk)) {
+		int ret = PTR_ERR(dom->clk);
+
+		if (ret == -EPROBE_DEFER)
+			return ret;
+
+		/* Some domains don't have a clk, so make sure that we
+		 * don't deref an error pointer later.
+		 */
+		dom->clk = NULL;
+	}
+
+	dom->base.name = name;
+	dom->base.power_on = bcm2835_power_pd_power_on;
+	dom->base.power_off = bcm2835_power_pd_power_off;
+
+	dom->domain = pd_xlate_index;
+	dom->power = power;
+
+	/* XXX: on/off at boot? */
+	pm_genpd_init(&dom->base, NULL, true);
+
+	power->pd_xlate.domains[pd_xlate_index] = &dom->base;
+
+	return 0;
+}
+
+/** bcm2835_reset_reset - Resets a block that has a reset line in the
+ * PM block.
+ *
+ * The consumer of the reset controller must have the power domain up
+ * -- there's no reset ability with the power domain down.  To reset
+ * the sub-block, we just disable its access to memory through the
+ * ASB, reset, and re-enable.
+ */
+static int bcm2835_reset_reset(struct reset_controller_dev *rcdev,
+			       unsigned long id)
+{
+	struct bcm2835_power *power = container_of(rcdev, struct bcm2835_power,
+						   reset);
+	struct bcm2835_power_domain *pd;
+	int ret;
+
+	switch (id) {
+	case BCM2835_RESET_V3D:
+		pd = &power->domains[BCM2835_POWER_DOMAIN_GRAFX_V3D];
+		break;
+	case BCM2835_RESET_H264:
+		pd = &power->domains[BCM2835_POWER_DOMAIN_IMAGE_H264];
+		break;
+	case BCM2835_RESET_ISP:
+		pd = &power->domains[BCM2835_POWER_DOMAIN_IMAGE_ISP];
+		break;
+	default:
+		dev_err(power->dev, "Bad reset id %ld\n", id);
+		return -EINVAL;
+	}
+
+	ret = bcm2835_power_pd_power_off(&pd->base);
+	if (ret)
+		return ret;
+
+	return bcm2835_power_pd_power_on(&pd->base);
+}
+
+static int bcm2835_reset_status(struct reset_controller_dev *rcdev,
+				unsigned long id)
+{
+	struct bcm2835_power *power = container_of(rcdev, struct bcm2835_power,
+						   reset);
+
+	switch (id) {
+	case BCM2835_RESET_V3D:
+		return !PM_READ(PM_GRAFX & PM_V3DRSTN);
+	case BCM2835_RESET_H264:
+		return !PM_READ(PM_IMAGE & PM_H264RSTN);
+	case BCM2835_RESET_ISP:
+		return !PM_READ(PM_IMAGE & PM_ISPRSTN);
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct reset_control_ops bcm2835_reset_ops = {
+	.reset = bcm2835_reset_reset,
+	.status = bcm2835_reset_status,
+};
+
+static const char *const power_domain_names[] = {
+	[BCM2835_POWER_DOMAIN_GRAFX] = "grafx",
+	[BCM2835_POWER_DOMAIN_GRAFX_V3D] = "v3d",
+
+	[BCM2835_POWER_DOMAIN_IMAGE] = "image",
+	[BCM2835_POWER_DOMAIN_IMAGE_PERI] = "peri_image",
+	[BCM2835_POWER_DOMAIN_IMAGE_H264] = "h264",
+	[BCM2835_POWER_DOMAIN_IMAGE_ISP] = "isp",
+
+	[BCM2835_POWER_DOMAIN_USB] = "usb",
+	[BCM2835_POWER_DOMAIN_DSI0] = "dsi0",
+	[BCM2835_POWER_DOMAIN_DSI1] = "dsi1",
+	[BCM2835_POWER_DOMAIN_CAM0] = "cam0",
+	[BCM2835_POWER_DOMAIN_CAM1] = "cam1",
+	[BCM2835_POWER_DOMAIN_CCP2TX] = "ccp2tx",
+	[BCM2835_POWER_DOMAIN_HDMI] = "hdmi",
+};
+
+static int bcm2835_power_probe(struct platform_device *pdev)
+{
+	struct bcm2835_pm *pm = dev_get_drvdata(pdev->dev.parent);
+	struct device *dev = &pdev->dev;
+	struct bcm2835_power *power;
+	static const struct {
+		int parent, child;
+	} domain_deps[] = {
+		{ BCM2835_POWER_DOMAIN_GRAFX, BCM2835_POWER_DOMAIN_GRAFX_V3D },
+		{ BCM2835_POWER_DOMAIN_IMAGE, BCM2835_POWER_DOMAIN_IMAGE_PERI },
+		{ BCM2835_POWER_DOMAIN_IMAGE, BCM2835_POWER_DOMAIN_IMAGE_H264 },
+		{ BCM2835_POWER_DOMAIN_IMAGE, BCM2835_POWER_DOMAIN_IMAGE_ISP },
+		{ BCM2835_POWER_DOMAIN_IMAGE_PERI, BCM2835_POWER_DOMAIN_USB },
+		{ BCM2835_POWER_DOMAIN_IMAGE_PERI, BCM2835_POWER_DOMAIN_CAM0 },
+		{ BCM2835_POWER_DOMAIN_IMAGE_PERI, BCM2835_POWER_DOMAIN_CAM1 },
+	};
+	int ret = 0, i;
+	u32 id;
+
+	power = devm_kzalloc(dev, sizeof(*power), GFP_KERNEL);
+	if (!power)
+		return -ENOMEM;
+	platform_set_drvdata(pdev, power);
+
+	power->dev = dev;
+	power->base = pm->base;
+	power->asb = pm->asb;
+	power->rpivid_asb = pm->rpivid_asb;
+
+	id = readl(power->asb + ASB_AXI_BRDG_ID);
+	if (id != BCM2835_BRDG_ID /* "BRDG" */) {
+		dev_err(dev, "ASB register ID returned 0x%08x\n", id);
+		return -ENODEV;
+	}
+
+	if (power->rpivid_asb) {
+		id = readl(power->rpivid_asb + ASB_AXI_BRDG_ID);
+		if (id != BCM2835_BRDG_ID /* "BRDG" */) {
+			dev_err(dev, "RPiVid ASB register ID returned 0x%08x\n",
+				     id);
+			return -ENODEV;
+		}
+	}
+
+	power->pd_xlate.domains = devm_kcalloc(dev,
+					       ARRAY_SIZE(power_domain_names),
+					       sizeof(*power->pd_xlate.domains),
+					       GFP_KERNEL);
+	if (!power->pd_xlate.domains)
+		return -ENOMEM;
+
+	power->pd_xlate.num_domains = ARRAY_SIZE(power_domain_names);
+
+	for (i = 0; i < ARRAY_SIZE(power_domain_names); i++) {
+		ret = bcm2835_init_power_domain(power, i, power_domain_names[i]);
+		if (ret)
+			goto fail;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(domain_deps); i++) {
+		pm_genpd_add_subdomain(&power->domains[domain_deps[i].parent].base,
+				       &power->domains[domain_deps[i].child].base);
+	}
+
+	power->reset.owner = THIS_MODULE;
+	power->reset.nr_resets = BCM2835_RESET_COUNT;
+	power->reset.ops = &bcm2835_reset_ops;
+	power->reset.of_node = dev->parent->of_node;
+
+	ret = devm_reset_controller_register(dev, &power->reset);
+	if (ret)
+		goto fail;
+
+	of_genpd_add_provider_onecell(dev->parent->of_node, &power->pd_xlate);
+
+	dev_info(dev, "Broadcom BCM2835 power domains driver");
+	return 0;
+
+fail:
+	for (i = 0; i < ARRAY_SIZE(power_domain_names); i++) {
+		struct generic_pm_domain *dom = &power->domains[i].base;
+
+		if (dom->name)
+			pm_genpd_remove(dom);
+	}
+	return ret;
+}
+
+static int bcm2835_power_remove(struct platform_device *pdev)
+{
+	return 0;
+}
+
+static struct platform_driver bcm2835_power_driver = {
+	.probe		= bcm2835_power_probe,
+	.remove		= bcm2835_power_remove,
+	.driver = {
+		.name =	"bcm2835-power",
+	},
+};
+module_platform_driver(bcm2835_power_driver);
+
+MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
+MODULE_DESCRIPTION("Driver for Broadcom BCM2835 PM power domains and reset");
+MODULE_LICENSE("GPL");