linux-toradex.git/include/linux/interconnect.h, branch v6.16-rc6

interconnect: core: Add dynamic id allocation support

2025-04-15T11:13:36+00:00

The current interconnect framework relies on static IDs for node
creation and registration, which limits topologies with multiple
instances of the same interconnect provider. To address this,
introduce icc_node_create_dyn() and icc_link_nodes() APIs to
dynamically allocate IDs for interconnect nodes during creation
and link. This change removes the dependency on static IDs,
allowing multiple instances of the same hardware, such as EPSS L3.

Signed-off-by: Raviteja Laggyshetty 
Link: https://lore.kernel.org/r/20250415095343.32125-3-quic_rlaggysh@quicinc.com
Signed-off-by: Georgi Djakov

interconnect: drop unused icc_get() interface

2023-05-30T19:04:46+00:00

The icc_get() interface can be used to lookup an interconnect path based
on global node ids. There has never been any users of this interface and
all lookups are currently done from the devicetree.

Remove the unused icc_get() interface.

Reviewed-by: Konrad Dybcio 
Signed-off-by: Johan Hovold 
Reviewed-by: Bjorn Andersson 
Link: https://lore.kernel.org/r/20230523095248.25211-1-johan+linaro@kernel.org
Signed-off-by: Georgi Djakov

interconnect: add device managed bulk API

2022-07-04T13:14:29+00:00

Add device managed bulk API to simplify driver.

Signed-off-by: Peng Fan 
Link: https://lore.kernel.org/r/20220703091132.1412063-4-peng.fan@oss.nxp.com
Signed-off-by: Georgi Djakov

interconnect: Add stubs for the bulk API

2022-03-01T14:31:05+00:00

Add stub functions for the bulk API to allow compile testing.

Reviewed-by: Alex Elder 
Link: https://lore.kernel.org/r/20220301090735.26599-1-djakov@kernel.org
Signed-off-by: Georgi Djakov

interconnect: Add bulk API helpers

2020-09-08T13:28:49+00:00

There are drivers which just need to get multiple interconnect paths,
request some predefined amounts of bandwidth and then just toggle the
paths between enabled/disabled state.

The aim of this patch is simplify the above and to allow drivers to put
all the path names and bandwidth data into a single static icc_bulk_data
table and call the icc_bulk_* functions on that table in order to scale
all the interconnect paths in parallel.

Suggested-by: Evan Green 
Suggested-by: Bjorn Andersson 
Reviewed-by: Bjorn Andersson 
Link: https://lore.kernel.org/r/20200729123439.9961-1-georgi.djakov@linaro.org
Signed-off-by: Georgi Djakov

Merge tag 'pm-5.8-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2020-06-10T21:04:39+00:00

Pull more power management updates from Rafael Wysocki:
 "These are operating performance points (OPP) framework updates mostly,
  including support for interconnect bandwidth in the OPP core, plus a
  few cpufreq changes, including boost support in the CPPC cpufreq
  driver, an ACPI device power management fix and a hibernation code
  cleanup.

  Specifics:

   - Add support for interconnect bandwidth to the OPP core (Georgi
     Djakov, Saravana Kannan, Sibi Sankar, Viresh Kumar).

   - Add support for regulator enable/disable to the OPP core (Kamil
     Konieczny).

   - Add boost support to the CPPC cpufreq driver (Xiongfeng Wang).

   - Make the tegra186 cpufreq driver set the
     CPUFREQ_NEED_INITIAL_FREQ_CHECK flag (Mian Yousaf Kaukab).

   - Prevent the ACPI power management from using power resources with
     devices where the list of power resources for power state D0 (full
     power) is missing (Rafael Wysocki).

   - Annotate a hibernation-related function with __init (Christophe
     JAILLET)"

* tag 'pm-5.8-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: PM: Avoid using power resources if there are none for D0
  cpufreq: CPPC: add SW BOOST support
  cpufreq: change '.set_boost' to act on one policy
  PM: hibernate: Add __init annotation to swsusp_header_init()
  opp: Don't parse icc paths unnecessarily
  opp: Remove bandwidth votes when target_freq is zero
  opp: core: add regulators enable and disable
  opp: Reorder the code for !target_freq case
  opp: Expose bandwidth information via debugfs
  cpufreq: dt: Add support for interconnect bandwidth scaling
  opp: Update the bandwidth on OPP frequency changes
  opp: Add sanity checks in _read_opp_key()
  opp: Add support for parsing interconnect bandwidth
  cpufreq: tegra186: add CPUFREQ_NEED_INITIAL_FREQ_CHECK flag
  OPP: Add helpers for reading the binding properties
  dt-bindings: opp: Introduce opp-peak-kBps and opp-avg-kBps bindings

opp: Expose bandwidth information via debugfs

2020-05-29T04:45:12+00:00

Expose the bandwidth information as well via debugfs.

Signed-off-by: Viresh Kumar 
Signed-off-by: Georgi Djakov

Merge branch 'icc-get-by-index' into icc-next

2020-05-15T07:46:18+00:00

This is an immutable branch shared with the OPP tree. It contains also
the patches to convert the interconnect framework from tristate to bool
after Greg agreed with that. This will make the integration between
the OPP layer and interconnect much easier.

* icc-get-by-index:
  interconnect: Add of_icc_get_by_index() helper function
  interconnect: Disallow interconnect core to be built as a module
  interconnect: Remove unused module exit code from core

Signed-off-by: Georgi Djakov

interconnect: Add of_icc_get_by_index() helper function

2020-05-13T11:06:32+00:00

This is the same as the traditional of_icc_get() function, but the
difference is that it takes index as an argument, instead of name.

Reviewed-by: Matthias Kaehlcke 
Reviewed-by: Sibi Sankar 
Link: https://lore.kernel.org/r/20200512125327.1868-4-georgi.djakov@linaro.org
Signed-off-by: Georgi Djakov

interconnect: Add helpers for enabling/disabling a path

2020-05-10T15:30:37+00:00

There is a repeated pattern in multiple drivers where they want to switch
the bandwidth between zero and some other value. This is happening often
in the suspend/resume callbacks. Let's add helper functions to enable and
disable the path, so that callers don't have to take care of remembering
the bandwidth values and handle this in the framework instead.

With this patch the users can call icc_disable() and icc_enable() to lower
their bandwidth request to zero and then restore it back to it's previous
value.

Suggested-by: Evan Green 
Suggested-by: Bjorn Andersson 
Signed-off-by: Georgi Djakov 
Reviewed-by: Matthias Kaehlcke 
Link: https://lore.kernel.org/r/20200507120846.8354-1-georgi.djakov@linaro.org
Signed-off-by: Georgi Djakov