linux.git/drivers/pci/pwrctrl, branch master Linux kernel source tree Merge tag 'pci-v7.2-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci 2026-06-24T19:48:43+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-06-24T19:48:43+00:00 26ae421f7f49f8a6a32d15b1d21a782b46a1bad5 Pull pci updates from Bjorn Helgaas: "Enumeration: - Remove MPS/MRRS Kconfig settings (CONFIG_PCIE_BUS_*) that worked around a WiFi device defect; use a quirk or boot-time "pci=pcie_bus_tune_*" kernel parameter instead (Bjorn Helgaas) - Always lift 2.5GT/s restriction in PCIe failed link retraining to avoid clamping a link to 2.5GT/s after hot-plug changes the device (Maciej W. Rozycki) - Request bus reassignment when not probe-only to fix an enumeration regression on Marvell CN106XX and possibly other DT-based systems (Ratheesh Kannoth) - Fix procfs race between pci_proc_init() and pci_bus_add_device() that resulted in 'proc_dir_entry ... already registered' warnings and pointer corruption (Krzysztof Wilczyński) - Fix sysfs race that causes 'duplicate filename' warnings and boot panics by converting PCI resource files to static attributes (Krzysztof Wilczyński) - Expose sysfs 'resourceN_resize' attributes only on platforms with PCI mmap (Krzysztof Wilczyński) - Require CAP_SYS_ADMIN to write to sysfs 'resourceN_resize' attributes (Krzysztof Wilczyński) - Add security_locked_down(LOCKDOWN_PCI_ACCESS) to alpha PCI resource mmap path to match the generic path (Krzysztof Wilczyński) - Use kstrtobool() to parse the 'rom' attribute input to avoid the unexpected behavior of enabling the ROM when writing '0' with no trailing newline (Krzysztof Wilczyński) Resource management: - Improve resource claim logging for debuggability (Ilpo Järvinen) - Clean up several uses of const parameters (Ilpo Järvinen) - Check option ROM header signatures and lengths before accessing to avoid page faults and alignment faults (Guixin Liu) ASPM: - Don't reconfigure ASPM when entering low-power D-state; only do it when returning back to D0 (Carlos Bilbao) Power management: - During suspend, set power state to 'unknown' for all devices, not just those with drivers (Lukas Wunner) - Skip restoring Resizable BARs and VF Resizable BARs if device doesn't respond to config reads, to avoid invalid array accesses (Marco Nenciarini) - Add pci_suspend_retains_context() so drivers can tell whether devices retain internal state across suspend/resume, since some platforms reset devices on suspend; use this in nvme to avoid issues on Qcom RCs (Manivannan Sadhasivam) Power control: - Only to power on/off devices that actually support power control to avoid poking at incompatible devices mentioned in DT (Manivannan Sadhasivam) Virtualization and resets: - Log device readiness timeouts as errors, not warnings, because the device is likely unusable in this case (Bjorn Helgaas) - Wait for device readiness after soft reset (D3hot -> D0uninitialized transition), when the device may respond with Request Retry Status (RRS) if it needs more time to initialize (Bjorn Helgaas) - Drop unnecessary retries when restoring BARs because resets should now already include all required delays (Lukas Wunner) - Avoid FLR for MediaTek MT7925 WiFi, where FLR fails after a VM terminates uncleanly (Jose Ignacio Tornos Martinez) - Avoid SBR for Qualcomm WCN6855/WCN7850 WiFi, SDX62/SDX65 modems, which seem not to support it correctly (Jose Ignacio Tornos Martinez) Peer-to-peer DMA: - Prevent P2PDMA as well as CPU access to non-mappable BARs, e.g., s390 ISM BARs (Matt Evans) - Add Intel QAT, DSA, IAA devices to whitelist (Lukas Wunner) Endpoint framework: - Add endpoint controller APIs for use by function drivers to discover auxiliary blocks like DMA engines (Koichiro Den) - Remember DesignWare eDMA engine base/size and expose them via the EPC aux-resource API (Koichiro Den) - Add endpoint embedded doorbell fallback, used if MSI allocation fails (Koichiro Den) - Validate BAR index and remove dead BAR read in endpoint doorbell test (Carlos Bilbao) - Unwind MSI/MSI-X vectors if NTB initialization fails part-way through (Koichiro Den) - Cache sleepable pci_irq_vector() value at ISR setup to avoid calling it from hardirq context (Koichiro Den) - Call sleepable pci_epc_raise_irq() from a work item instead of atomic context, e.g., when setting bits in NTB peer doorbells in the ntb_peer_db_set() path (Koichiro Den) - Report 0-based vNTB doorbell vector to account for link event 0 and historically skipped slot 1 (Koichiro Den) - Prevent configfs writes to vNTB db_count and other values that are already in use after EPC attach (Koichiro Den) - Account for vNTB db_valid reserved slots (link event 0 and historically skipped slot 1) so they don't appear as valid doorbells (Koichiro Den) - Implement vNTB .db_vector_count()/mask() for doorbells so clients can use multiple vectors and avoid thundering herds (Koichiro Den) - Report 0-based NTB doorbell vector to account for link event 0 and historically skipped slot 1 (Koichiro Den) - Fix doorbell bitmask and IRQ vector handling to clear only specified bits, use the correct vector for non-contiguous Linux IRQ numbers, and validate incoming vectors (Koichiro Den) - Implement NTB .db_vector_count()/mask() for doorbells so clients can use multiple vectors (Koichiro Den) Native PCIe controller infrastructure: - Add pci_host_common_link_train_delay() for the mandatory delay after > 5GT/s Link training completes and use it for cadence HPA, j721e, LGA; dwc; aardvark, mediatek-gen3, rzg3s (Hans Zhang) - Protect root bus removal with rescan lock in altera, brcmstb, cadence, dwc, iproc, mediatek, plda, rockchip to prevent use-after-free or crashes when racing with sysfs rescan or hotplug (Hans Zhang) - Add pci_host_common_parse_ports() for use by any native driver to parse Root Port properties (per-Link features like width, speed, PHY, power and reset control, etc should be described in Root Port stanzas, not the host bridge; currently only reset GPIOs implemented) (Sherry Sun) New native PCIe controller drivers: - Add DT binding and driver for UltraRISC DP1000 PCIe controller (Xincheng Zhang, Jia Wang) Altera PCIe controller driver: - Do not dispose of the parent IRQ mapping, which belongs to the parent interrupt controller (Mahesh Vaidya) - Fix chained IRQ handler ordering issue and resource leaks on probe failure (Mahesh Vaidya) AMD MDB PCIe controller driver: - Assert PERST# on shutdown so any connected Endpoints are held in reset during shutdown (Sai Krishna Musham) Amlogic Meson PCIe controller driver: - Propagate devm_add_action_or_reset() failure to fix probe error path (Shuvam Pandey) - Add .remove() callback to deinitialize the host bridge and power off the PHY (Shuvam Pandey) Broadcom iProc PCIe controller driver: - Restore .map_irq() assignment; its removal broke INTx on the iproc platform bus driver (Mark Tomlinson) Broadcom STB PCIe controller driver: - No change, but products using certain WiFi devices may be affected by removal of CONFIG_PCIE_BUS_* (see above) Freescale i.MX6 PCIe controller driver: - Move IMX6SX_GPR12_PCIE_TEST_POWERDOWN handling into the core reset functions (Richard Zhu) - Assert PERST# before enabling regulators to ensure that even if power is enabled, endpoint stays inactive until REFCLK is stable (Sherry Sun) - Parse reset properties in Root Port nodes (falling back to host bridge) to help support Key E connectors and the pwrctrl framework (Sherry Sun) - Configure i.MX95 REF_USE_PAD before PHY reset (Richard Zhu) - Assert i.MX95 ref_clk_en after reference clock stabilizes (Richard Zhu) - Integrate new pwrctrl API for DTs with Root Port-level power supplies (Sherry Sun) Intel Gateway PCIe controller driver: - Enable clock before PHY init for correct ordering (Florian Eckert) - Add .start_link() callback so the driver works again (Florian Eckert) - Stop overwriting the ATU base address discovered by dw_pcie_get_resources() (Florian Eckert) - Add DT 'atu' region since this is hardware-specific, and fall back to driver default if lacking (Florian Eckert) Loongson PCIe controller driver: - Ignore downstream devices only on internal bridges to avoid Loongson hardware issue (Rong Zhang) - Quirk old Loongson-3C6000 bridges that advertise incorrect supported link speeds (Ziyao Li) Marvell MVEBU PCIe controller driver: - Use fixed-width interrupt masks to avoid truncation in 64-bit builds (Rosen Penev) MediaTek PCIe controller driver: - Use FIELD_PREP() to fix incorrect operator precedence in PCIE_FTS_NUM_L0 (Li RongQing) - Fix IRQ domain leak when port fails to enable (Manivannan Sadhasivam) - Use actual physical address for MSI message address instead of virt_to_phys() (Manivannan Sadhasivam) - Add EcoNet EN7528 to DT binding (Caleb James DeLisle) MediaTek PCIe Gen3 controller driver: - Deassert PCIE_PHY_RSTB so REFCLK is stable for at least 100ms (PCIE_T_PVPERL_MS) before deasserting PERST# (Jian Yang) - Add .shutdown() to assert PERST# before powering down device (Jian Yang) - Do full device power down on removal, including asserting PERST#, when removing driver (Chen-Yu Tsai) - Fix a 'failed to create pwrctrl devices' error message that was inadvertently skipped (Chen-Yu Tsai) NVIDIA Tegra194 PCIe controller driver: - Program the DesignWare PORT_AFR L1 entrance latency based on the 'aspm-l1-entry-delay-ns' DT property (Manikanta Maddireddy) Qualcomm PCIe controller driver: - Add Eliza SoC compatible in DT binding (Krishna Chaitanya Chundru) - Set max OPP during resume so DBI register accesses don't fail with NoC errors (Qiang Yu) - Add pci_host_common_d3cold_possible() to determine whether downstream devices are already in D3hot and wakeup-enabled devices are capable of generating PME from D3cold (Krishna Chaitanya Chundru) - Add .get_ltssm() callback to get the LTSSM status without DBI, since DBI may be inaccessible after PME_Turn_Off (Krishna Chaitanya Chundru) - Power down PHY via PARF_PHY_CTRL before disabling rails/clocks to avoid power leakage (Krishna Chaitanya Chundru) - Decide whether suspend should put the link in L2 and power down using pci_host_common_d3cold_possible() instead of checking whether ASPM L1 is enabled (Krishna Chaitanya Chundru) - Add qcom D3cold support to tear down interconnect bandwidth and OPP votes (Krishna Chaitanya Chundru) - Handle unsupported mixed PERST#/PHY DT configurations, e.g., PHY in RP node while PERST# is in the RC node, but warn about the DT issue (Qiang Yu) - Program T_POWER_ON based on DT 't-power-on-us' property in case hardware advertises incorrect values (Krishna Chaitanya Chundru) - Disable ASPM L0s for SA8775P (Shawn Guo) - Initialize DWC MSI lock for firmware-managed ECAM hosts, which don't use the dw_pcie_host_init() path that initializes the lock (Yadu M G) Renesas RZ/G3S PCIe controller driver: - Add RZ/V2N DT support (Lad Prabhakar) SOPHGO PCIe controller driver: - Add 'dma-coherent' DT property for sg2042-pcie driver (Han Gao) Synopsys DesignWare PCIe controller driver: - Apply ECRC TLP Digest workaround for all DesignWare cores prior to 5.10a, not just 4.90a and 5.00a (Manikanta Maddireddy) - Use common struct dw_pcie 'mode' rather than duplicating it in artpec6, dra7xx, dwc-pcie, and keembay driver structs (Hans Zhang) - Use DEFINE_SHOW_ATTRIBUTE for ltssm_status debugfs to reduce boilerplate and fix a seq_file memory leak by including a .release() callback (Hans Zhang) - Fix a signedness bug in fault injection test code (Dan Carpenter) - Avoid NULL pointer dereference when tearing down debugfs for controller that lacks RAS DES capability (Shuvam Pandey) MicroSemi Switchtec management driver: - Add Gen6 Device IDs (Ben Reed) Miscellaneous: - Remove unused gpio.h include from amd-mdb, designware-plat, fu740, visconti drivers (Andy Shevchenko) - Fix typos in documentation (josh ziegler) - Use FIELD_MODIFY() instead of open-coding it (Hans Zhang)" * tag 'pci-v7.2-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (168 commits) PCI/sysfs: Use kstrtobool() to parse the ROM attribute input PCI/sysfs: Limit BAR resize attribute scope to platforms with PCI mmap PCI/sysfs: Remove pci_create_legacy_files() and pci_sysfs_init() PCI/sysfs: Convert legacy I/O and memory attributes to static definitions PCI/sysfs: Add __weak pci_legacy_has_sparse() helper alpha/PCI: Compute legacy size in pci_mmap_legacy_page_range() PCI: Add macros for legacy I/O and memory address space sizes PCI/sysfs: Remove pci_{create,remove}_sysfs_dev_files() alpha/PCI: Convert resource files to static attributes alpha/PCI: Add static PCI resource attribute macros alpha/PCI: Remove WARN from __pci_mmap_fits() and __legacy_mmap_fits() alpha/PCI: Fix __pci_mmap_fits() overflow for zero-length BARs alpha/PCI: Use PCI resource accessor macros alpha/PCI: Use BAR index in sysfs attr->private instead of resource pointer alpha/PCI: Add security_locked_down() check to pci_mmap_resource() PCI/sysfs: Limit pci_sysfs_init() late_initcall compile scope PCI/sysfs: Add stubs for pci_{create,remove}_sysfs_dev_files() PCI/sysfs: Warn about BAR resize failure in __resource_resize_store() PCI/sysfs: Convert PCI resource files to static attributes PCI/proc: Fix race between pci_proc_init() and pci_bus_add_device() ... 
Pull pci updates from Bjorn Helgaas:
 "Enumeration:

   - Remove MPS/MRRS Kconfig settings (CONFIG_PCIE_BUS_*) that worked
     around a WiFi device defect; use a quirk or boot-time
     "pci=pcie_bus_tune_*" kernel parameter instead (Bjorn Helgaas)

   - Always lift 2.5GT/s restriction in PCIe failed link retraining to
     avoid clamping a link to 2.5GT/s after hot-plug changes the device
     (Maciej W. Rozycki)

   - Request bus reassignment when not probe-only to fix an enumeration
     regression on Marvell CN106XX and possibly other DT-based systems
     (Ratheesh Kannoth)

   - Fix procfs race between pci_proc_init() and pci_bus_add_device()
     that resulted in 'proc_dir_entry ... already registered' warnings
     and pointer corruption (Krzysztof Wilczyński)

   - Fix sysfs race that causes 'duplicate filename' warnings and boot
     panics by converting PCI resource files to static attributes
     (Krzysztof Wilczyński)

   - Expose sysfs 'resourceN_resize' attributes only on platforms with
     PCI mmap (Krzysztof Wilczyński)

   - Require CAP_SYS_ADMIN to write to sysfs 'resourceN_resize'
     attributes (Krzysztof Wilczyński)

   - Add security_locked_down(LOCKDOWN_PCI_ACCESS) to alpha PCI resource
     mmap path to match the generic path (Krzysztof Wilczyński)

   - Use kstrtobool() to parse the 'rom' attribute input to avoid the
     unexpected behavior of enabling the ROM when writing '0' with no
     trailing newline (Krzysztof Wilczyński)

  Resource management:

   - Improve resource claim logging for debuggability (Ilpo Järvinen)

   - Clean up several uses of const parameters (Ilpo Järvinen)

   - Check option ROM header signatures and lengths before accessing to
     avoid page faults and alignment faults (Guixin Liu)

  ASPM:

   - Don't reconfigure ASPM when entering low-power D-state; only do it
     when returning back to D0 (Carlos Bilbao)

  Power management:

   - During suspend, set power state to 'unknown' for all devices, not
     just those with drivers (Lukas Wunner)

   - Skip restoring Resizable BARs and VF Resizable BARs if device
     doesn't respond to config reads, to avoid invalid array accesses
     (Marco Nenciarini)

   - Add pci_suspend_retains_context() so drivers can tell whether
     devices retain internal state across suspend/resume, since some
     platforms reset devices on suspend; use this in nvme to avoid
     issues on Qcom RCs (Manivannan Sadhasivam)

  Power control:

   - Only to power on/off devices that actually support power control to
     avoid poking at incompatible devices mentioned in DT (Manivannan
     Sadhasivam)

  Virtualization and resets:

   - Log device readiness timeouts as errors, not warnings, because the
     device is likely unusable in this case (Bjorn Helgaas)

   - Wait for device readiness after soft reset (D3hot ->
     D0uninitialized transition), when the device may respond with
     Request Retry Status (RRS) if it needs more time to initialize
     (Bjorn Helgaas)

   - Drop unnecessary retries when restoring BARs because resets should
     now already include all required delays (Lukas Wunner)

   - Avoid FLR for MediaTek MT7925 WiFi, where FLR fails after a VM
     terminates uncleanly (Jose Ignacio Tornos Martinez)

   - Avoid SBR for Qualcomm WCN6855/WCN7850 WiFi, SDX62/SDX65 modems,
     which seem not to support it correctly (Jose Ignacio Tornos
     Martinez)

  Peer-to-peer DMA:

   - Prevent P2PDMA as well as CPU access to non-mappable BARs, e.g.,
     s390 ISM BARs (Matt Evans)

   - Add Intel QAT, DSA, IAA devices to whitelist (Lukas Wunner)

  Endpoint framework:

   - Add endpoint controller APIs for use by function drivers to
     discover auxiliary blocks like DMA engines (Koichiro Den)

   - Remember DesignWare eDMA engine base/size and expose them via the
     EPC aux-resource API (Koichiro Den)

   - Add endpoint embedded doorbell fallback, used if MSI allocation
     fails (Koichiro Den)

   - Validate BAR index and remove dead BAR read in endpoint doorbell
     test (Carlos Bilbao)

   - Unwind MSI/MSI-X vectors if NTB initialization fails part-way
     through (Koichiro Den)

   - Cache sleepable pci_irq_vector() value at ISR setup to avoid
     calling it from hardirq context (Koichiro Den)

   - Call sleepable pci_epc_raise_irq() from a work item instead of
     atomic context, e.g., when setting bits in NTB peer doorbells in
     the ntb_peer_db_set() path (Koichiro Den)

   - Report 0-based vNTB doorbell vector to account for link event 0 and
     historically skipped slot 1 (Koichiro Den)

   - Prevent configfs writes to vNTB db_count and other values that are
     already in use after EPC attach (Koichiro Den)

   - Account for vNTB db_valid reserved slots (link event 0 and
     historically skipped slot 1) so they don't appear as valid
     doorbells (Koichiro Den)

   - Implement vNTB .db_vector_count()/mask() for doorbells so clients
     can use multiple vectors and avoid thundering herds (Koichiro Den)

   - Report 0-based NTB doorbell vector to account for link event 0 and
     historically skipped slot 1 (Koichiro Den)

   - Fix doorbell bitmask and IRQ vector handling to clear only
     specified bits, use the correct vector for non-contiguous Linux IRQ
     numbers, and validate incoming vectors (Koichiro Den)

   - Implement NTB .db_vector_count()/mask() for doorbells so clients
     can use multiple vectors (Koichiro Den)

  Native PCIe controller infrastructure:

   - Add pci_host_common_link_train_delay() for the mandatory delay
     after > 5GT/s Link training completes and use it for cadence HPA,
     j721e, LGA; dwc; aardvark, mediatek-gen3, rzg3s (Hans Zhang)

   - Protect root bus removal with rescan lock in altera, brcmstb,
     cadence, dwc, iproc, mediatek, plda, rockchip to prevent
     use-after-free or crashes when racing with sysfs rescan or hotplug
     (Hans Zhang)

   - Add pci_host_common_parse_ports() for use by any native driver to
     parse Root Port properties (per-Link features like width, speed,
     PHY, power and reset control, etc should be described in Root Port
     stanzas, not the host bridge; currently only reset GPIOs
     implemented) (Sherry Sun)

  New native PCIe controller drivers:

   - Add DT binding and driver for UltraRISC DP1000 PCIe controller
     (Xincheng Zhang, Jia Wang)

  Altera PCIe controller driver:

   - Do not dispose of the parent IRQ mapping, which belongs to the
     parent interrupt controller (Mahesh Vaidya)

   - Fix chained IRQ handler ordering issue and resource leaks on probe
     failure (Mahesh Vaidya)

  AMD MDB PCIe controller driver:

   - Assert PERST# on shutdown so any connected Endpoints are held in
     reset during shutdown (Sai Krishna Musham)

  Amlogic Meson PCIe controller driver:

   - Propagate devm_add_action_or_reset() failure to fix probe error
     path (Shuvam Pandey)

   - Add .remove() callback to deinitialize the host bridge and power
     off the PHY (Shuvam Pandey)

  Broadcom iProc PCIe controller driver:

   - Restore .map_irq() assignment; its removal broke INTx on the iproc
     platform bus driver (Mark Tomlinson)

  Broadcom STB PCIe controller driver:

   - No change, but products using certain WiFi devices may be affected
     by removal of CONFIG_PCIE_BUS_* (see above)

  Freescale i.MX6 PCIe controller driver:

   - Move IMX6SX_GPR12_PCIE_TEST_POWERDOWN handling into the core reset
     functions (Richard Zhu)

   - Assert PERST# before enabling regulators to ensure that even if
     power is enabled, endpoint stays inactive until REFCLK is stable
     (Sherry Sun)

   - Parse reset properties in Root Port nodes (falling back to host
     bridge) to help support Key E connectors and the pwrctrl framework
     (Sherry Sun)

   - Configure i.MX95 REF_USE_PAD before PHY reset (Richard Zhu)

   - Assert i.MX95 ref_clk_en after reference clock stabilizes (Richard
     Zhu)

   - Integrate new pwrctrl API for DTs with Root Port-level power
     supplies (Sherry Sun)

  Intel Gateway PCIe controller driver:

   - Enable clock before PHY init for correct ordering (Florian Eckert)

   - Add .start_link() callback so the driver works again (Florian
     Eckert)

   - Stop overwriting the ATU base address discovered by
     dw_pcie_get_resources() (Florian Eckert)

   - Add DT 'atu' region since this is hardware-specific, and fall back
     to driver default if lacking (Florian Eckert)

  Loongson PCIe controller driver:

   - Ignore downstream devices only on internal bridges to avoid
     Loongson hardware issue (Rong Zhang)

   - Quirk old Loongson-3C6000 bridges that advertise incorrect
     supported link speeds (Ziyao Li)

  Marvell MVEBU PCIe controller driver:

   - Use fixed-width interrupt masks to avoid truncation in 64-bit
     builds (Rosen Penev)

  MediaTek PCIe controller driver:

   - Use FIELD_PREP() to fix incorrect operator precedence in
     PCIE_FTS_NUM_L0 (Li RongQing)

   - Fix IRQ domain leak when port fails to enable (Manivannan
     Sadhasivam)

   - Use actual physical address for MSI message address instead of
     virt_to_phys() (Manivannan Sadhasivam)

   - Add EcoNet EN7528 to DT binding (Caleb James DeLisle)

  MediaTek PCIe Gen3 controller driver:

   - Deassert PCIE_PHY_RSTB so REFCLK is stable for at least 100ms
     (PCIE_T_PVPERL_MS) before deasserting PERST# (Jian Yang)

   - Add .shutdown() to assert PERST# before powering down device (Jian
     Yang)

   - Do full device power down on removal, including asserting PERST#,
     when removing driver (Chen-Yu Tsai)

   - Fix a 'failed to create pwrctrl devices' error message that was
     inadvertently skipped (Chen-Yu Tsai)

  NVIDIA Tegra194 PCIe controller driver:

   - Program the DesignWare PORT_AFR L1 entrance latency based on the
     'aspm-l1-entry-delay-ns' DT property (Manikanta Maddireddy)

  Qualcomm PCIe controller driver:

   - Add Eliza SoC compatible in DT binding (Krishna Chaitanya Chundru)

   - Set max OPP during resume so DBI register accesses don't fail with
     NoC errors (Qiang Yu)

   - Add pci_host_common_d3cold_possible() to determine whether
     downstream devices are already in D3hot and wakeup-enabled devices
     are capable of generating PME from D3cold (Krishna Chaitanya
     Chundru)

   - Add .get_ltssm() callback to get the LTSSM status without DBI,
     since DBI may be inaccessible after PME_Turn_Off (Krishna Chaitanya
     Chundru)

   - Power down PHY via PARF_PHY_CTRL before disabling rails/clocks to
     avoid power leakage (Krishna Chaitanya Chundru)

   - Decide whether suspend should put the link in L2 and power down
     using pci_host_common_d3cold_possible() instead of checking whether
     ASPM L1 is enabled (Krishna Chaitanya Chundru)

   - Add qcom D3cold support to tear down interconnect bandwidth and OPP
     votes (Krishna Chaitanya Chundru)

   - Handle unsupported mixed PERST#/PHY DT configurations, e.g., PHY in
     RP node while PERST# is in the RC node, but warn about the DT issue
     (Qiang Yu)

   - Program T_POWER_ON based on DT 't-power-on-us' property in case
     hardware advertises incorrect values (Krishna Chaitanya Chundru)

   - Disable ASPM L0s for SA8775P (Shawn Guo)

   - Initialize DWC MSI lock for firmware-managed ECAM hosts, which
     don't use the dw_pcie_host_init() path that initializes the lock
     (Yadu M G)

  Renesas RZ/G3S PCIe controller driver:

   - Add RZ/V2N DT support (Lad Prabhakar)

  SOPHGO PCIe controller driver:

   - Add 'dma-coherent' DT property for sg2042-pcie driver (Han Gao)

  Synopsys DesignWare PCIe controller driver:

   - Apply ECRC TLP Digest workaround for all DesignWare cores prior to
     5.10a, not just 4.90a and 5.00a (Manikanta Maddireddy)

   - Use common struct dw_pcie 'mode' rather than duplicating it in
     artpec6, dra7xx, dwc-pcie, and keembay driver structs (Hans Zhang)

   - Use DEFINE_SHOW_ATTRIBUTE for ltssm_status debugfs to reduce
     boilerplate and fix a seq_file memory leak by including a
     .release() callback (Hans Zhang)

   - Fix a signedness bug in fault injection test code (Dan Carpenter)

   - Avoid NULL pointer dereference when tearing down debugfs for
     controller that lacks RAS DES capability (Shuvam Pandey)

  MicroSemi Switchtec management driver:

   - Add Gen6 Device IDs (Ben Reed)

  Miscellaneous:

   - Remove unused gpio.h include from amd-mdb, designware-plat, fu740,
     visconti drivers (Andy Shevchenko)

   - Fix typos in documentation (josh ziegler)

   - Use FIELD_MODIFY() instead of open-coding it (Hans Zhang)"

* tag 'pci-v7.2-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (168 commits)
  PCI/sysfs: Use kstrtobool() to parse the ROM attribute input
  PCI/sysfs: Limit BAR resize attribute scope to platforms with PCI mmap
  PCI/sysfs: Remove pci_create_legacy_files() and pci_sysfs_init()
  PCI/sysfs: Convert legacy I/O and memory attributes to static definitions
  PCI/sysfs: Add __weak pci_legacy_has_sparse() helper
  alpha/PCI: Compute legacy size in pci_mmap_legacy_page_range()
  PCI: Add macros for legacy I/O and memory address space sizes
  PCI/sysfs: Remove pci_{create,remove}_sysfs_dev_files()
  alpha/PCI: Convert resource files to static attributes
  alpha/PCI: Add static PCI resource attribute macros
  alpha/PCI: Remove WARN from __pci_mmap_fits() and __legacy_mmap_fits()
  alpha/PCI: Fix __pci_mmap_fits() overflow for zero-length BARs
  alpha/PCI: Use PCI resource accessor macros
  alpha/PCI: Use BAR index in sysfs attr->private instead of resource pointer
  alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
  PCI/sysfs: Limit pci_sysfs_init() late_initcall compile scope
  PCI/sysfs: Add stubs for pci_{create,remove}_sysfs_dev_files()
  PCI/sysfs: Warn about BAR resize failure in __resource_resize_store()
  PCI/sysfs: Convert PCI resource files to static attributes
  PCI/proc: Fix race between pci_proc_init() and pci_bus_add_device()
  ...
PCI/pwrctrl: Lock device when calling device_is_bound() 2026-05-18T22:32:23+00:00 Bartosz Golaszewski bartosz.golaszewski@oss.qualcomm.com 2026-05-18T10:07:00+00:00 548f3d287d92bcbc908b02db57fb889f8a8276a0 The kerneldoc for device_is_bound() states that it must be called with the device lock taken. Synchronize the two calls in pwrctrl core. Fixes: b35cf3b6aa1e ("PCI/pwrctrl: Add APIs to power on/off pwrctrl devices") Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org> Link: https://patch.msgid.link/20260518100700.47581-1-bartosz.golaszewski@oss.qualcomm.com 
The kerneldoc for device_is_bound() states that it must be called with
the device lock taken. Synchronize the two calls in pwrctrl core.

Fixes: b35cf3b6aa1e ("PCI/pwrctrl: Add APIs to power on/off pwrctrl devices")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20260518100700.47581-1-bartosz.golaszewski@oss.qualcomm.com
PCI/pwrctrl: Do not try to power on/off devices that don't need pwrctrl 2026-04-27T14:47:15+00:00 Manivannan Sadhasivam manivannan.sadhasivam@oss.qualcomm.com 2026-04-21T10:41:01+00:00 95c4920701dfca6a8cf4986112898382fa7afc0f pci_pwrctrl_is_required() detects whether a device needs PCI pwrctrl support. It is currently used in pci_pwrctrl_create_device(), but not in pci_pwrctrl_power_{on/off}_device() APIs. This leads to pwrctrl core trying to power on/off incompatible devices like USB hub downstream ports defined in DT. Add this check to prevent pwrctrl core from poking at wrong devices. Fixes: b35cf3b6aa1e ("PCI/pwrctrl: Add APIs to power on/off pwrctrl devices") Reported-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com> [bhelgaas: split pci_pwrctrl_is_required() move to separate patch] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Link: https://patch.msgid.link/20260421104102.12322-1-manivannan.sadhasivam@oss.qualcomm.com 
pci_pwrctrl_is_required() detects whether a device needs PCI pwrctrl
support. It is currently used in pci_pwrctrl_create_device(), but not in
pci_pwrctrl_power_{on/off}_device() APIs. This leads to pwrctrl core trying
to power on/off incompatible devices like USB hub downstream ports defined
in DT.

Add this check to prevent pwrctrl core from poking at wrong devices.

Fixes: b35cf3b6aa1e ("PCI/pwrctrl: Add APIs to power on/off pwrctrl devices")
Reported-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
[bhelgaas: split pci_pwrctrl_is_required() move to separate patch]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260421104102.12322-1-manivannan.sadhasivam@oss.qualcomm.com
PCI/pwrctrl: Move pci_pwrctrl_is_required() earlier in file 2026-04-27T14:47:15+00:00 Manivannan Sadhasivam manivannan.sadhasivam@oss.qualcomm.com 2026-04-21T10:41:01+00:00 73ae5392b0cfcce02efa23ee7123d8764ef070a8 Move pci_pwrctrl_is_required() earlier in the file so it can be used by pci_pwrctrl_power_off_device() and pci_pwrctrl_power_on_device(). Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com> [bhelgaas: split to its own patch] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Link: https://patch.msgid.link/20260421104102.12322-1-manivannan.sadhasivam@oss.qualcomm.com 
Move pci_pwrctrl_is_required() earlier in the file so it can be used by
pci_pwrctrl_power_off_device() and pci_pwrctrl_power_on_device().

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
[bhelgaas: split to its own patch]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260421104102.12322-1-manivannan.sadhasivam@oss.qualcomm.com
driver core: Replace dev->of_node_reused with dev_of_node_reused() 2026-04-26T21:50:20+00:00 Douglas Anderson dianders@chromium.org 2026-04-06T23:23:01+00:00 4aca5e62f37dd10cc771d5489900f927d133a9f1 In C, bitfields are not necessarily safe to modify from multiple threads without locking. Switch "of_node_reused" over to the "flags" field so modifications are safe. Cc: Johan Hovold <johan@kernel.org> Acked-by: Mark Brown <broonie@kernel.org> Reviewed-by: Rafael J. Wysocki (Intel) <rafael@kernel.org> Reviewed-by: Danilo Krummrich <dakr@kernel.org> Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Johan Hovold <johan@kernel.org> Acked-by: Manivannan Sadhasivam <mani@kernel.org> # PCI_PWRCTRL Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Link: https://patch.msgid.link/20260406162231.v5.8.I806b8636cd3724f6cd1f5e199318ab8694472d90@changeid Signed-off-by: Danilo Krummrich <dakr@kernel.org> 
In C, bitfields are not necessarily safe to modify from multiple
threads without locking. Switch "of_node_reused" over to the "flags"
field so modifications are safe.

Cc: Johan Hovold <johan@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Rafael J. Wysocki (Intel) <rafael@kernel.org>
Reviewed-by: Danilo Krummrich <dakr@kernel.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Johan Hovold <johan@kernel.org>
Acked-by: Manivannan Sadhasivam <mani@kernel.org> # PCI_PWRCTRL
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://patch.msgid.link/20260406162231.v5.8.I806b8636cd3724f6cd1f5e199318ab8694472d90@changeid
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Merge tag 'pci-v7.1-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci 2026-04-15T21:41:21+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-04-15T21:41:21+00:00 40286d6379aacfcc053253ef78dc78b09addffda Pull pci updates from Bjorn Helgaas: "Enumeration: - Allow TLP Processing Hints to be enabled for RCiEPs (George Abraham P) - Enable AtomicOps only if we know the Root Port supports them (Gerd Bayer) - Don't enable AtomicOps for RCiEPs since none of them need Atomic Ops and we can't tell whether the Root Complex would support them (Gerd Bayer) - Leave Precision Time Measurement disabled until a driver enables it to avoid PCIe errors (Mika Westerberg) - Make pci_set_vga_state() fail if bridge doesn't support VGA routing, i.e., PCI_BRIDGE_CTL_VGA is not writable, and return errors to vga_get() callers including userspace via /dev/vga_arbiter (Simon Richter) - Validate max-link-speed from DT in j721e, brcmstb, mediatek-gen3, rzg3s drivers (where the actual controller constraints are known), and remove validation from the generic OF DT accessor (Hans Zhang) - Remove pc110pad driver (no longer useful after 486 CPU support removed) and no_pci_devices() (pc110pad was the last user) (Dmitry Torokhov, Heiner Kallweit) Resource management: - Prevent assigning space to unimplemented bridge windows; previously we mistakenly assumed prefetchable window existed and assigned space and put a BAR there (Ahmed Naseef) - Avoid shrinking bridge windows to fit in the initial Root Port window; fixes one problem with devices with large BARs connected via switches, e.g., Thunderbolt (Ilpo Järvinen) - Pass full extent of empty space, not just the aligned space, to resource_alignf callback so free space before the requested alignment can be used (Ilpo Järvinen) - Place small resources before larger ones for better utilization of address space (Ilpo Järvinen) - Fix alignment calculation for resource size larger than align, e.g., bridge windows larger than the 1MB required alignment (Ilpo Järvinen) Reset: - Update slot handling so all ARI functions are treated as being in the same slot. They're all reset by Secondary Bus Reset, but previously drivers of ARI functions that appeared to be on a non-zero device weren't notified and fatal hardware errors could result (Keith Busch) - Make sysfs reset_subordinate hotplug safe to avoid spurious hotplug events (Keith Busch) - Hide Secondary Bus Reset ('bus') from sysfs reset_methods if masked by CXL because it has no effect (Vidya Sagar) - Avoid FLR for AMD NPU device, where it causes the device to hang (Lizhi Hou) Error handling: - Clear only error bits in PCIe Device Status to avoid accidentally clearing Emergency Power Reduction Detected (Shuai Xue) - Check for AER errors even in devices without drivers (Lukas Wunner) - Initialize ratelimit info so DPC and EDR paths log AER error information (Kuppuswamy Sathyanarayanan) Power control: - Add UPD720201/UPD720202 USB 3.0 xHCI Host Controller .compatible so generic pwrctrl driver can control it (Neil Armstrong) Hotplug: - Set LED_HW_PLUGGABLE for NPEM hotplug-capable ports so LED core doesn't complain when setting brightness fails because the endpoint is gone (Richard Cheng) Peer-to-peer DMA: - Allow wildcards in list of host bridges that support peer-to-peer DMA between hierarchy domains and add all Google SoCs (Jacob Moroni) Endpoint framework: - Advertise dynamic inbound mapping support in pci-epf-test and update host pci_endpoint_test to skip doorbell testing if not advertised by endpoint (Koichiro Den) - Return 0, not remaining timeout, when MHI eDMA ops complete so mhi_ep_ring_add_element() doesn't interpret non-zero as failure (Daniel Hodges) - Remove vntb and ntb duplicate resource teardown that leads to oops when .allow_link() fails or .drop_link() is called (Koichiro Den) - Disable vntb delayed work before clearing BAR mappings and doorbells to avoid oops caused by doing the work after resources have been torn down (Koichiro Den) - Add a way to describe reserved subregions within BARs, e.g., platform-owned fixed register windows, and use it for the RK3588 BAR4 DMA ctrl window (Koichiro Den) - Add BAR_DISABLED for BARs that will never be available to an EPF driver, and change some BAR_RESERVED annotations to BAR_DISABLED (Niklas Cassel) - Add NTB .get_dma_dev() callback for cases where DMA API requires a different device, e.g., vNTB devices (Koichiro Den) - Add reserved region types for MSI-X Table and PBA so Endpoint controllers can them as describe hardware-owned regions in a BAR_RESERVED BAR (Manikanta Maddireddy) - Make Tegra194/234 BAR0 programmable and remove 1MB size limit (Manikanta Maddireddy) - Expose Tegra BAR2 (MSI-X) and BAR4 (DMA) as 64-bit BAR_RESERVED (Manikanta Maddireddy) - Add Tegra194 and Tegra234 device table entries to pci_endpoint_test (Manikanta Maddireddy) - Skip the BAR subrange selftest if there are not enough inbound window resources to run the test (Christian Bruel) New native PCIe controller drivers: - Add DT binding and driver for Andes QiLai SoC PCIe host controller (Randolph Lin) - Add DT binding and driver for ESWIN PCIe Root Complex (Senchuan Zhang) Baikal T-1 PCIe controller driver: - Remove driver since it never quite became usable (Andy Shevchenko) Cadence PCIe controller driver: - Implement byte/word config reads with dword (32-bit) reads because some Cadence controllers don't support sub-dword accesses (Aksh Garg) CIX Sky1 PCIe controller driver: - Add 'power-domains' to DT binding for SCMI power domain (Gary Yang) Freescale i.MX6 PCIe controller driver: - Add i.MX94 and i.MX943 to fsl,imx6q-pcie-ep DT binding (Richard Zhu) - Delay instead of polling for L2/L3 Ready after PME_Turn_off when suspending i.MX6SX because LTSSM registers are inaccessible (Richard Zhu) - Separate PERST# assertion (for resetting endpoints) from core reset (for resetting the RC itself) to prepare for new DTs with PERST# GPIO in per-Root Port nodes (Sherry Sun) - Retain Root Port MSI capability on i.MX7D, i.MX8MM, and i.MX8MQ so MSI from downstream devices will work (Richard Zhu) - Fix i.MX95 reference clock source selection when internal refclk is used (Franz Schnyder) Freescale Layerscape PCIe controller driver: - Allow building as a removable module (Sascha Hauer) MediaTek PCIe Gen3 controller driver: - Use dev_err_probe() to simplify error paths and make deferred probe messages visible in /sys/kernel/debug/devices_deferred (Chen-Yu Tsai) - Power off device if setup fails (Chen-Yu Tsai) - Integrate new pwrctrl API to enable power control for WiFi/BT adapters on mainboard or in PCIe or M.2 slots (Chen-Yu Tsai) NVIDIA Tegra194 PCIe controller driver: - Poll less aggressively and non-atomically for PME_TO_Ack during transition to L2 (Vidya Sagar) - Disable LTSSM after transition to Detect on surprise link down to stop toggling between Polling and Detect (Manikanta Maddireddy) - Don't force the device into the D0 state before L2 when suspending or shutting down the controller (Vidya Sagar) - Disable PERST# IRQ only in Endpoint mode because it's not registered in Root Port mode (Manikanta Maddireddy) - Handle 'nvidia,refclk-select' as optional (Vidya Sagar) - Disable direct speed change in Endpoint mode so link speed change is controlled by the host (Vidya Sagar) - Set LTR values before link up to avoid bogus LTR messages with 0 latency (Vidya Sagar) - Allow system suspend when the Endpoint link is down (Vidya Sagar) - Use DWC IP core version, not Tegra custom values, to avoid DWC core version check warnings (Manikanta Maddireddy) - Apply ECRC workaround to devices based on DesignWare 5.00a as well as 4.90a (Manikanta Maddireddy) - Disable PM Substate L1.2 in Endpoint mode to work around Tegra234 erratum (Vidya Sagar) - Delay post-PERST# cleanup until core is powered on to avoid CBB timeout (Manikanta Maddireddy) - Assert CLKREQ# so switches that forward it to their downstream side can bring up those links successfully (Vidya Sagar) - Calibrate pipe to UPHY for Endpoint mode to reset stale PLL state from any previous bad link state (Vidya Sagar) - Remove IRQF_ONESHOT flag from Endpoint interrupt registration so DMA driver and Endpoint controller driver can share the interrupt line (Vidya Sagar) - Enable DMA interrupt to support DMA in both Root Port and Endpoint modes (Vidya Sagar) - Enable hardware link retraining after link goes down in Endpoint mode (Vidya Sagar) - Add DT binding and driver support for core clock monitoring (Vidya Sagar) Qualcomm PCIe controller driver: - Advertise 'Hot-Plug Capable' and set 'No Command Completed Support' since Qcom Root Ports support hotplug events like DL_Up/Down and can accept writes to Slot Control without delays between writes (Krishna Chaitanya Chundru) Renesas R-Car PCIe controller driver: - Mark Endpoint BAR0 and BAR2 as Resizable (Koichiro Den) - Reduce EPC BAR alignment requirement to 4K (Koichiro Den) Renesas RZ/G3S PCIe controller driver: - Add RZ/G3E to DT binding and to driver (John Madieu) - Assert (not deassert) resets in probe error path (John Madieu) - Assert resets in suspend path in reverse order they were deasserted during probe (John Madieu) - Rework inbound window algorithm to prevent mapping more than intended region and enforce alignment on size, to prepare for RZ/G3E support (John Madieu) Rockchip DesignWare PCIe controller driver: - Add tracepoints for PCIe controller LTSSM transitions and link rate changes (Shawn Lin) - Trace LTSSM events collected by the dw-rockchip debug FIFO (Shawn Lin) SOPHGO PCIe controller driver: - Disable ASPM L0s and L1 on Sophgo 2042 PCIe Root Ports that advertise support for them (Yao Zi) Synopsys DesignWare PCIe controller driver: - Continue with system suspend even if an Endpoint doesn't respond with PME_TO_Ack message (Manivannan Sadhasivam) - Set Endpoint MSI-X Table Size in the correct function of a multi-function device when configuring MSI-X, not in Function 0 (Aksh Garg) - Set Max Link Width and Max Link Speed for all functions of a multi-function device, not just Function 0 (Aksh Garg) - Expose PCIe event counters in groups 5-7 in debugfs (Hans Zhang) Miscellaneous: - Warn only once about invalid ACS kernel parameter format (Richard Cheng) - Suppress FW_BUG warning when writing sysfs 'numa_node' with the current value (Li RongQing) - Drop redundant 'depends on PCI' from Kconfig (Julian Braha)" * tag 'pci-v7.1-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (165 commits) PCI/P2PDMA: Add Google SoCs to the P2P DMA host bridge list PCI/P2PDMA: Allow wildcard Device IDs in host bridge list PCI: sg2042: Avoid L0s and L1 on Sophgo 2042 PCIe Root Ports PCI: cadence: Add flags for disabling ASPM capability for broken Root Ports PCI: tegra194: Add core monitor clock support dt-bindings: PCI: tegra194: Add monitor clock support PCI: tegra194: Enable hardware hot reset mode in Endpoint mode PCI: tegra194: Enable DMA interrupt PCI: tegra194: Remove IRQF_ONESHOT flag during Endpoint interrupt registration PCI: tegra194: Calibrate pipe to UPHY for Endpoint mode PCI: tegra194: Assert CLKREQ# explicitly by default PCI: tegra194: Fix CBB timeout caused by DBI access before core power-on PCI: tegra194: Disable L1.2 capability of Tegra234 EP PCI: dwc: Apply ECRC workaround to DesignWare 5.00a as well PCI: tegra194: Use DWC IP core version PCI: tegra194: Free up Endpoint resources during remove() PCI: tegra194: Allow system suspend when the Endpoint link is not up PCI: tegra194: Set LTR message request before PCIe link up in Endpoint mode PCI: tegra194: Disable direct speed change for Endpoint mode PCI: tegra194: Use devm_gpiod_get_optional() to parse "nvidia,refclk-select" ... 
Pull pci updates from Bjorn Helgaas:
 "Enumeration:

   - Allow TLP Processing Hints to be enabled for RCiEPs (George Abraham
     P)

   - Enable AtomicOps only if we know the Root Port supports them (Gerd
     Bayer)

   - Don't enable AtomicOps for RCiEPs since none of them need Atomic
     Ops and we can't tell whether the Root Complex would support them
     (Gerd Bayer)

   - Leave Precision Time Measurement disabled until a driver enables it
     to avoid PCIe errors (Mika Westerberg)

   - Make pci_set_vga_state() fail if bridge doesn't support VGA
     routing, i.e., PCI_BRIDGE_CTL_VGA is not writable, and return
     errors to vga_get() callers including userspace via
     /dev/vga_arbiter (Simon Richter)

   - Validate max-link-speed from DT in j721e, brcmstb, mediatek-gen3,
     rzg3s drivers (where the actual controller constraints are known),
     and remove validation from the generic OF DT accessor (Hans Zhang)

   - Remove pc110pad driver (no longer useful after 486 CPU support
     removed) and no_pci_devices() (pc110pad was the last user) (Dmitry
     Torokhov, Heiner Kallweit)

  Resource management:

   - Prevent assigning space to unimplemented bridge windows; previously
     we mistakenly assumed prefetchable window existed and assigned
     space and put a BAR there (Ahmed Naseef)

   - Avoid shrinking bridge windows to fit in the initial Root Port
     window; fixes one problem with devices with large BARs connected
     via switches, e.g., Thunderbolt (Ilpo Järvinen)

   - Pass full extent of empty space, not just the aligned space, to
     resource_alignf callback so free space before the requested
     alignment can be used (Ilpo Järvinen)

   - Place small resources before larger ones for better utilization of
     address space (Ilpo Järvinen)

   - Fix alignment calculation for resource size larger than align,
     e.g., bridge windows larger than the 1MB required alignment (Ilpo
     Järvinen)

  Reset:

   - Update slot handling so all ARI functions are treated as being in
     the same slot. They're all reset by Secondary Bus Reset, but
     previously drivers of ARI functions that appeared to be on a
     non-zero device weren't notified and fatal hardware errors could
     result (Keith Busch)

   - Make sysfs reset_subordinate hotplug safe to avoid spurious hotplug
     events (Keith Busch)

   - Hide Secondary Bus Reset ('bus') from sysfs reset_methods if masked
     by CXL because it has no effect (Vidya Sagar)

   - Avoid FLR for AMD NPU device, where it causes the device to hang
     (Lizhi Hou)

  Error handling:

   - Clear only error bits in PCIe Device Status to avoid accidentally
     clearing Emergency Power Reduction Detected (Shuai Xue)

   - Check for AER errors even in devices without drivers (Lukas Wunner)

   - Initialize ratelimit info so DPC and EDR paths log AER error
     information (Kuppuswamy Sathyanarayanan)

  Power control:

   - Add UPD720201/UPD720202 USB 3.0 xHCI Host Controller .compatible so
     generic pwrctrl driver can control it (Neil Armstrong)

  Hotplug:

   - Set LED_HW_PLUGGABLE for NPEM hotplug-capable ports so LED core
     doesn't complain when setting brightness fails because the endpoint
     is gone (Richard Cheng)

  Peer-to-peer DMA:

   - Allow wildcards in list of host bridges that support peer-to-peer
     DMA between hierarchy domains and add all Google SoCs (Jacob
     Moroni)

  Endpoint framework:

   - Advertise dynamic inbound mapping support in pci-epf-test and
     update host pci_endpoint_test to skip doorbell testing if not
     advertised by endpoint (Koichiro Den)

   - Return 0, not remaining timeout, when MHI eDMA ops complete so
     mhi_ep_ring_add_element() doesn't interpret non-zero as failure
     (Daniel Hodges)

   - Remove vntb and ntb duplicate resource teardown that leads to oops
     when .allow_link() fails or .drop_link() is called (Koichiro Den)

   - Disable vntb delayed work before clearing BAR mappings and
     doorbells to avoid oops caused by doing the work after resources
     have been torn down (Koichiro Den)

   - Add a way to describe reserved subregions within BARs, e.g.,
     platform-owned fixed register windows, and use it for the RK3588
     BAR4 DMA ctrl window (Koichiro Den)

   - Add BAR_DISABLED for BARs that will never be available to an EPF
     driver, and change some BAR_RESERVED annotations to BAR_DISABLED
     (Niklas Cassel)

   - Add NTB .get_dma_dev() callback for cases where DMA API requires a
     different device, e.g., vNTB devices (Koichiro Den)

   - Add reserved region types for MSI-X Table and PBA so Endpoint
     controllers can them as describe hardware-owned regions in a
     BAR_RESERVED BAR (Manikanta Maddireddy)

   - Make Tegra194/234 BAR0 programmable and remove 1MB size limit
     (Manikanta Maddireddy)

   - Expose Tegra BAR2 (MSI-X) and BAR4 (DMA) as 64-bit BAR_RESERVED
     (Manikanta Maddireddy)

   - Add Tegra194 and Tegra234 device table entries to pci_endpoint_test
     (Manikanta Maddireddy)

   - Skip the BAR subrange selftest if there are not enough inbound
     window resources to run the test (Christian Bruel)

  New native PCIe controller drivers:

   - Add DT binding and driver for Andes QiLai SoC PCIe host controller
     (Randolph Lin)

   - Add DT binding and driver for ESWIN PCIe Root Complex (Senchuan
     Zhang)

  Baikal T-1 PCIe controller driver:

   - Remove driver since it never quite became usable (Andy Shevchenko)

  Cadence PCIe controller driver:

   - Implement byte/word config reads with dword (32-bit) reads because
     some Cadence controllers don't support sub-dword accesses (Aksh
     Garg)

  CIX Sky1 PCIe controller driver:

   - Add 'power-domains' to DT binding for SCMI power domain (Gary Yang)

  Freescale i.MX6 PCIe controller driver:

   - Add i.MX94 and i.MX943 to fsl,imx6q-pcie-ep DT binding (Richard
     Zhu)

   - Delay instead of polling for L2/L3 Ready after PME_Turn_off when
     suspending i.MX6SX because LTSSM registers are inaccessible
     (Richard Zhu)

   - Separate PERST# assertion (for resetting endpoints) from core reset
     (for resetting the RC itself) to prepare for new DTs with PERST#
     GPIO in per-Root Port nodes (Sherry Sun)

   - Retain Root Port MSI capability on i.MX7D, i.MX8MM, and i.MX8MQ so
     MSI from downstream devices will work (Richard Zhu)

   - Fix i.MX95 reference clock source selection when internal refclk is
     used (Franz Schnyder)

  Freescale Layerscape PCIe controller driver:

   - Allow building as a removable module (Sascha Hauer)

  MediaTek PCIe Gen3 controller driver:

   - Use dev_err_probe() to simplify error paths and make deferred probe
     messages visible in /sys/kernel/debug/devices_deferred (Chen-Yu
     Tsai)

   - Power off device if setup fails (Chen-Yu Tsai)

   - Integrate new pwrctrl API to enable power control for WiFi/BT
     adapters on mainboard or in PCIe or M.2 slots (Chen-Yu Tsai)

  NVIDIA Tegra194 PCIe controller driver:

   - Poll less aggressively and non-atomically for PME_TO_Ack during
     transition to L2 (Vidya Sagar)

   - Disable LTSSM after transition to Detect on surprise link down to
     stop toggling between Polling and Detect (Manikanta Maddireddy)

   - Don't force the device into the D0 state before L2 when suspending
     or shutting down the controller (Vidya Sagar)

   - Disable PERST# IRQ only in Endpoint mode because it's not
     registered in Root Port mode (Manikanta Maddireddy)

   - Handle 'nvidia,refclk-select' as optional (Vidya Sagar)

   - Disable direct speed change in Endpoint mode so link speed change
     is controlled by the host (Vidya Sagar)

   - Set LTR values before link up to avoid bogus LTR messages with 0
     latency (Vidya Sagar)

   - Allow system suspend when the Endpoint link is down (Vidya Sagar)

   - Use DWC IP core version, not Tegra custom values, to avoid DWC core
     version check warnings (Manikanta Maddireddy)

   - Apply ECRC workaround to devices based on DesignWare 5.00a as well
     as 4.90a (Manikanta Maddireddy)

   - Disable PM Substate L1.2 in Endpoint mode to work around Tegra234
     erratum (Vidya Sagar)

   - Delay post-PERST# cleanup until core is powered on to avoid CBB
     timeout (Manikanta Maddireddy)

   - Assert CLKREQ# so switches that forward it to their downstream side
     can bring up those links successfully (Vidya Sagar)

   - Calibrate pipe to UPHY for Endpoint mode to reset stale PLL state
     from any previous bad link state (Vidya Sagar)

   - Remove IRQF_ONESHOT flag from Endpoint interrupt registration so
     DMA driver and Endpoint controller driver can share the interrupt
     line (Vidya Sagar)

   - Enable DMA interrupt to support DMA in both Root Port and Endpoint
     modes (Vidya Sagar)

   - Enable hardware link retraining after link goes down in Endpoint
     mode (Vidya Sagar)

   - Add DT binding and driver support for core clock monitoring (Vidya
     Sagar)

  Qualcomm PCIe controller driver:

   - Advertise 'Hot-Plug Capable' and set 'No Command Completed Support'
     since Qcom Root Ports support hotplug events like DL_Up/Down and
     can accept writes to Slot Control without delays between writes
     (Krishna Chaitanya Chundru)

  Renesas R-Car PCIe controller driver:

   - Mark Endpoint BAR0 and BAR2 as Resizable (Koichiro Den)

   - Reduce EPC BAR alignment requirement to 4K (Koichiro Den)

  Renesas RZ/G3S PCIe controller driver:

   - Add RZ/G3E to DT binding and to driver (John Madieu)

   - Assert (not deassert) resets in probe error path (John Madieu)

   - Assert resets in suspend path in reverse order they were deasserted
     during probe (John Madieu)

   - Rework inbound window algorithm to prevent mapping more than
     intended region and enforce alignment on size, to prepare for
     RZ/G3E support (John Madieu)

  Rockchip DesignWare PCIe controller driver:

   - Add tracepoints for PCIe controller LTSSM transitions and link rate
     changes (Shawn Lin)

   - Trace LTSSM events collected by the dw-rockchip debug FIFO (Shawn
     Lin)

  SOPHGO PCIe controller driver:

   - Disable ASPM L0s and L1 on Sophgo 2042 PCIe Root Ports that
     advertise support for them (Yao Zi)

  Synopsys DesignWare PCIe controller driver:

   - Continue with system suspend even if an Endpoint doesn't respond
     with PME_TO_Ack message (Manivannan Sadhasivam)

   - Set Endpoint MSI-X Table Size in the correct function of a
     multi-function device when configuring MSI-X, not in Function 0
     (Aksh Garg)

   - Set Max Link Width and Max Link Speed for all functions of a
     multi-function device, not just Function 0 (Aksh Garg)

   - Expose PCIe event counters in groups 5-7 in debugfs (Hans Zhang)

  Miscellaneous:

   - Warn only once about invalid ACS kernel parameter format (Richard
     Cheng)

   - Suppress FW_BUG warning when writing sysfs 'numa_node' with the
     current value (Li RongQing)

   - Drop redundant 'depends on PCI' from Kconfig (Julian Braha)"

* tag 'pci-v7.1-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (165 commits)
  PCI/P2PDMA: Add Google SoCs to the P2P DMA host bridge list
  PCI/P2PDMA: Allow wildcard Device IDs in host bridge list
  PCI: sg2042: Avoid L0s and L1 on Sophgo 2042 PCIe Root Ports
  PCI: cadence: Add flags for disabling ASPM capability for broken Root Ports
  PCI: tegra194: Add core monitor clock support
  dt-bindings: PCI: tegra194: Add monitor clock support
  PCI: tegra194: Enable hardware hot reset mode in Endpoint mode
  PCI: tegra194: Enable DMA interrupt
  PCI: tegra194: Remove IRQF_ONESHOT flag during Endpoint interrupt registration
  PCI: tegra194: Calibrate pipe to UPHY for Endpoint mode
  PCI: tegra194: Assert CLKREQ# explicitly by default
  PCI: tegra194: Fix CBB timeout caused by DBI access before core power-on
  PCI: tegra194: Disable L1.2 capability of Tegra234 EP
  PCI: dwc: Apply ECRC workaround to DesignWare 5.00a as well
  PCI: tegra194: Use DWC IP core version
  PCI: tegra194: Free up Endpoint resources during remove()
  PCI: tegra194: Allow system suspend when the Endpoint link is not up
  PCI: tegra194: Set LTR message request before PCIe link up in Endpoint mode
  PCI: tegra194: Disable direct speed change for Endpoint mode
  PCI: tegra194: Use devm_gpiod_get_optional() to parse "nvidia,refclk-select"
  ...
PCI/pwrctrl: Fix pci_pwrctrl_is_required() device node leak 2026-03-23T20:57:43+00:00 Felix Gu ustc.gu@gmail.com 2026-03-23T11:05:22+00:00 70bb843794d150db8e653c9ab288c8533da00837 The for_each_endpoint_of_node() macro requires calling of_node_put() on the endpoint node when breaking out of the loop early. Add of_node_put(endpoint) before the early return to release the reference. Fixes: cf3287fb2c1f ("PCI/pwrctrl: Ensure that remote endpoint node parent has supply requirement") Signed-off-by: Felix Gu <ustc.gu@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org> Link: https://patch.msgid.link/20260323-pwctrl-v1-1-f5c03a2df7fb@gmail.com 
The for_each_endpoint_of_node() macro requires calling of_node_put() on the
endpoint node when breaking out of the loop early.

Add of_node_put(endpoint) before the early return to release the reference.

Fixes: cf3287fb2c1f ("PCI/pwrctrl: Ensure that remote endpoint node parent has supply requirement")
Signed-off-by: Felix Gu <ustc.gu@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20260323-pwctrl-v1-1-f5c03a2df7fb@gmail.com
PCI/pwrctrl: Do not power off on pwrctrl device removal 2026-03-23T20:25:32+00:00 Chen-Yu Tsai wenst@chromium.org 2026-02-26T09:22:33+00:00 2d8c5098b847f37dde8351fb5b5d190f1bb5c576 With the move to explicit pwrctrl power on/off APIs, the caller, i.e., the PCI controller driver, should manage the power state. The pwrctrl drivers should not try to clean up or power off when they are removed, as this might end up disabling an already disabled regulator, causing a big warning. This can be triggered if a PCI controller driver's .remove() callback calls pci_pwrctrl_destroy_devices() after pci_pwrctrl_power_off_devices(). Drop the devm cleanup parts that turn off regulators from the pwrctrl drivers. Fixes: b921aa3f8dec ("PCI/pwrctrl: Switch to pwrctrl create, power on/off, destroy APIs") Signed-off-by: Chen-Yu Tsai <wenst@chromium.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org> Link: https://patch.msgid.link/20260226092234.3859740-1-wenst@chromium.org 
With the move to explicit pwrctrl power on/off APIs, the caller, i.e., the
PCI controller driver, should manage the power state. The pwrctrl drivers
should not try to clean up or power off when they are removed, as this
might end up disabling an already disabled regulator, causing a big
warning.  This can be triggered if a PCI controller driver's .remove()
callback calls pci_pwrctrl_destroy_devices() after
pci_pwrctrl_power_off_devices().

Drop the devm cleanup parts that turn off regulators from the pwrctrl
drivers.

Fixes: b921aa3f8dec ("PCI/pwrctrl: Switch to pwrctrl create, power on/off, destroy APIs")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20260226092234.3859740-1-wenst@chromium.org
PCI/pwrctrl: generic: Add UPD720201/UPD720202 USB 3.0 xHCI Host Controller support 2026-03-18T17:11:26+00:00 Neil Armstrong neil.armstrong@linaro.org 2026-02-20T15:04:43+00:00 bd3622e5b8e0650669332d9e10244a704560cbfe Enable the generic pwrctrl driver to control power of PCIe UPD720201/UPD720202 USB 3.0 xHCI Host Controller. Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org> Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Link: https://patch.msgid.link/20260220-topic-sm8650-ayaneo-pocket-s2-base-v5-4-1ad79caa1efa@linaro.org 
Enable the generic pwrctrl driver to control power of PCIe
UPD720201/UPD720202 USB 3.0 xHCI Host Controller.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260220-topic-sm8650-ayaneo-pocket-s2-base-v5-4-1ad79caa1efa@linaro.org
PCI/pwrctrl: generic: Simplify dev_err_probe() usage 2026-03-18T17:11:14+00:00 Neil Armstrong neil.armstrong@linaro.org 2026-02-20T15:04:41+00:00 0862e2b06cd88491e2e854a24219219b8aa6e0b5 dev_err_probe() returns the error code passed to it, so this: dev_err_probe(dev, ret, "Failed to get slot regulators\n"); return ret; is equivalent to this: return dev_err_probe(dev, ret, "Failed to get slot regulators\n"); Simplify by using the latter. Suggested-by: Bartosz Golaszewski <brgl@kernel.org> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org> Link: https://patch.msgid.link/20260220-topic-sm8650-ayaneo-pocket-s2-base-v5-2-1ad79caa1efa@linaro.org 
dev_err_probe() returns the error code passed to it, so this:

  dev_err_probe(dev, ret, "Failed to get slot regulators\n");
  return ret;

is equivalent to this:

  return dev_err_probe(dev, ret, "Failed to get slot regulators\n");

Simplify by using the latter.

Suggested-by: Bartosz Golaszewski <brgl@kernel.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20260220-topic-sm8650-ayaneo-pocket-s2-base-v5-2-1ad79caa1efa@linaro.org