linux-stable.git/include/linux/dpll.h, branch v6.18.33

dpll: export __dpll_pin_change_ntf() for use under dpll_lock

2026-05-23T11:07:13+00:00

[ Upstream commit 620055cb1036a6125fd912e7a14b47a6572b809b ]

Export __dpll_pin_change_ntf() so that drivers can send pin change
notifications from within pin callbacks, which are already called
under dpll_lock. Using dpll_pin_change_ntf() in that context would
deadlock.

Add lockdep_assert_held() to catch misuse without the lock held.

Acked-by: Vadim Fedorenko 
Signed-off-by: Ivan Vecera 
Signed-off-by: Petr Oros 
Tested-by: Alexander Nowlin 
Reviewed-by: Arkadiusz Kubalewski 
Signed-off-by: Jacob Keller 
Link: https://patch.msgid.link/20260427-jk-iwl-net-petr-oros-fixes-v1-9-cdcb48303fd8@intel.com
Signed-off-by: Paolo Abeni 
Stable-dep-of: 9e5dead140af ("ice: add dpll peer notification for paired SMA and U.FL pins")
Signed-off-by: Sasha Levin

dpll: Add notifier chain for dpll events

2026-05-23T11:07:13+00:00

[ Upstream commit 2be467588d6bc6ec5988fc254e62a44b865912a0 ]

Currently, the DPLL subsystem reports events (creation, deletion, changes)
to userspace via Netlink. However, there is no mechanism for other kernel
components to be notified of these events directly.

Add a raw notifier chain to the DPLL core protected by dpll_lock. This
allows other kernel subsystems or drivers to register callbacks and
receive notifications when DPLL devices or pins are created, deleted,
or modified.

Define the following:
- Registration helpers: {,un}register_dpll_notifier()
- Event types: DPLL_DEVICE_CREATED, DPLL_PIN_CREATED, etc.
- Context structures: dpll_{device,pin}_notifier_info  to pass relevant
  data to the listeners.

The notification chain is invoked alongside the existing Netlink event
generation to ensure in-kernel listeners are kept in sync with the
subsystem state.

Reviewed-by: Vadim Fedorenko 
Co-developed-by: Ivan Vecera 
Signed-off-by: Ivan Vecera 
Signed-off-by: Petr Oros 
Reviewed-by: Arkadiusz Kubalewski 
Reviewed-by: Aleksandr Loktionov 
Link: https://patch.msgid.link/20260203174002.705176-4-ivecera@redhat.com
Signed-off-by: Paolo Abeni 
Stable-dep-of: 9e5dead140af ("ice: add dpll peer notification for paired SMA and U.FL pins")
Signed-off-by: Sasha Levin

dpll: Allow associating dpll pin with a firmware node

2026-05-23T11:07:13+00:00

[ Upstream commit d0f4771e2befbe8de3a16a564c6bbd1d5502cec3 ]

Extend the DPLL core to support associating a DPLL pin with a firmware
node. This association is required to allow other subsystems (such as
network drivers) to locate and request specific DPLL pins defined in
the Device Tree or ACPI.

* Add a .fwnode field to the struct dpll_pin
* Introduce dpll_pin_fwnode_set() helper to allow the provider driver
  to associate a pin with a fwnode after the pin has been allocated
* Introduce fwnode_dpll_pin_find() helper to allow consumers to search
  for a registered DPLL pin using its associated fwnode handle
* Ensure the fwnode reference is properly released in dpll_pin_put()

Reviewed-by: Aleksandr Loktionov 
Reviewed-by: Vadim Fedorenko 
Signed-off-by: Ivan Vecera 
Reviewed-by: Arkadiusz Kubalewski 
Link: https://patch.msgid.link/20260203174002.705176-2-ivecera@redhat.com
Signed-off-by: Paolo Abeni 
Stable-dep-of: 9e5dead140af ("ice: add dpll peer notification for paired SMA and U.FL pins")
Signed-off-by: Sasha Levin

dpll: add phase-adjust-gran pin attribute

2026-02-26T22:59:22+00:00

[ Upstream commit 30176bf7c871681df506f3165ffe76ec462db991 ]

Phase-adjust values are currently limited by a min-max range. Some
hardware requires, for certain pin types, that values be multiples of
a specific granularity, as in the zl3073x driver.

Add a `phase-adjust-gran` pin attribute and an appropriate field in
dpll_pin_properties. If set by the driver, use its value to validate
user-provided phase-adjust values.

Reviewed-by: Michal Schmidt 
Reviewed-by: Petr Oros 
Tested-by: Prathosh Satish 
Signed-off-by: Ivan Vecera 
Reviewed-by: Jiri Pirko 
Reviewed-by: Arkadiusz Kubalewski 
Link: https://patch.msgid.link/20251029153207.178448-2-ivecera@redhat.com
Signed-off-by: Jakub Kicinski 
Stable-dep-of: 5d41f95f5d0b ("dpll: zl3073x: Fix output pin phase adjustment sign")
Signed-off-by: Sasha Levin

dpll: add phase_offset_avg_factor_get/set callback ops

2025-09-30T01:57:41+00:00

Add new callback operations for a dpll device:
- phase_offset_avg_factor_get(...) - to obtain current phase offset
  averaging factor from dpll device,
- phase_offset_avg_factor_set(...) - to set phase offset averaging factor

Obtain the factor value using the get callback and provide it to the user
if the device driver implement this callback. Execute the set callback upon
user requests, if the driver implement it.

Signed-off-by: Ivan Vecera 
v2:
* do not require 'set' callback to retrieve current value
* always call 'set' callback regardless of current value
Reviewed-by: Vadim Fedorenko 
Link: https://patch.msgid.link/20250927084912.2343597-3-ivecera@redhat.com
Signed-off-by: Jakub Kicinski

dpll: add reference sync get/set

2025-06-27T23:38:02+00:00

Define function for reference sync pin registration and callback ops to
set/get current feature state.

Implement netlink handler to fill netlink messages with reference sync
pin configuration of capable pins (pin-get).

Implement netlink handler to call proper ops and configure reference
sync pin state (pin-set).

Reviewed-by: Przemek Kitszel 
Reviewed-by: Milena Olech 
Reviewed-by: Jiri Pirko 
Signed-off-by: Arkadiusz Kubalewski 
Link: https://patch.msgid.link/20250626135219.1769350-3-arkadiusz.kubalewski@intel.com
Signed-off-by: Jakub Kicinski

dpll: add phase_offset_monitor_get/set callback ops

2025-06-14T01:21:57+00:00

Add new callback operations for a dpll device:
- phase_offset_monitor_get(..) - to obtain current state of phase offset
  monitor feature from dpll device,
- phase_offset_monitor_set(..) - to allow feature configuration.

Obtain the feature state value using the get callback and provide it to
the user if the device driver implements callbacks.

Execute the set callback upon user requests.

Reviewed-by: Milena Olech 
Reviewed-by: Jiri Pirko 
Signed-off-by: Arkadiusz Kubalewski 
Acked-by: Vadim Fedorenko 
Link: https://patch.msgid.link/20250612152835.1703397-3-arkadiusz.kubalewski@intel.com
Signed-off-by: Jakub Kicinski

dpll: add clock quality level attribute and op

2024-11-03T16:39:07+00:00

In order to allow driver expose quality level of the clock it is
running, introduce a new netlink attr with enum to carry it to the
userspace. Also, introduce an op the dpll netlink code calls into the
driver to obtain the value.

Signed-off-by: Jiri Pirko 
Link: https://patch.msgid.link/20241030081157.966604-2-jiri@resnulli.us
Signed-off-by: Jakub Kicinski

dpll: add Embedded SYNC feature for a pin

2024-08-27T02:21:14+00:00

Implement and document new pin attributes for providing Embedded SYNC
capabilities to the DPLL subsystem users through a netlink pin-get
do/dump messages. Allow the user to set Embedded SYNC frequency with
pin-set do netlink message.

Reviewed-by: Aleksandr Loktionov 
Signed-off-by: Arkadiusz Kubalewski 
Reviewed-by: Jiri Pirko 
Link: https://patch.msgid.link/20240822222513.255179-2-arkadiusz.kubalewski@intel.com
Signed-off-by: Jakub Kicinski

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2024-03-07T18:29:36+00:00

Cross-merge networking fixes after downstream PR.

No conflicts.

Adjacent changes:

net/core/page_pool_user.c
  0b11b1c5c320 ("netdev: let netlink core handle -EMSGSIZE errors")
  429679dcf7d9 ("page_pool: fix netlink dump stop/resume")

Signed-off-by: Jakub Kicinski