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path: root/include/linux/interconnect.h
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2023-05-30interconnect: drop unused icc_get() interfaceJohan Hovold1-8/+0
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 <konrad.dybcio@linaro.org> Signed-off-by: Johan Hovold <johan+linaro@kernel.org> Reviewed-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20230523095248.25211-1-johan+linaro@kernel.org Signed-off-by: Georgi Djakov <djakov@kernel.org>
2022-07-04interconnect: add device managed bulk APIPeng Fan1-0/+7
Add device managed bulk API to simplify driver. Signed-off-by: Peng Fan <peng.fan@nxp.com> Link: https://lore.kernel.org/r/20220703091132.1412063-4-peng.fan@oss.nxp.com Signed-off-by: Georgi Djakov <djakov@kernel.org>
2022-03-01interconnect: Add stubs for the bulk APIGeorgi Djakov1-7/+29
Add stub functions for the bulk API to allow compile testing. Reviewed-by: Alex Elder <elder@linaro.org> Link: https://lore.kernel.org/r/20220301090735.26599-1-djakov@kernel.org Signed-off-by: Georgi Djakov <djakov@kernel.org>
2020-09-08interconnect: Add bulk API helpersGeorgi Djakov1-0/+22
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 <evgreen@chromium.org> Suggested-by: Bjorn Andersson <bjorn.andersson@linaro.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20200729123439.9961-1-georgi.djakov@linaro.org Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2020-06-11Merge tag 'pm-5.8-rc1-2' of ↵Linus Torvalds1-0/+6
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm 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
2020-05-29opp: Expose bandwidth information via debugfsViresh Kumar1-0/+6
Expose the bandwidth information as well via debugfs. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2020-05-15Merge branch 'icc-get-by-index' into icc-nextGeorgi Djakov1-0/+6
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 <georgi.djakov@linaro.org>
2020-05-13interconnect: Add of_icc_get_by_index() helper functionGeorgi Djakov1-0/+6
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 <mka@chromium.org> Reviewed-by: Sibi Sankar <sibis@codeaurora.org> Link: https://lore.kernel.org/r/20200512125327.1868-4-georgi.djakov@linaro.org Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2020-05-10interconnect: Add helpers for enabling/disabling a pathGeorgi Djakov1-0/+12
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 <evgreen@chromium.org> Suggested-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Link: https://lore.kernel.org/r/20200507120846.8354-1-georgi.djakov@linaro.org Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2020-04-27interconnect: Add devm_of_icc_get() as exported API for usersAkash Asthana1-0/+7
Users can use devm version of of_icc_get() to benefit from automatic resource release. Signed-off-by: Akash Asthana <akashast@codeaurora.org> Reviewed by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/1586946198-13912-2-git-send-email-akashast@codeaurora.org Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2019-08-13interconnect: Add support for path tagsGeorgi Djakov1-0/+5
Consumers may have use cases with different bandwidth requirements based on the system or driver state. The consumer driver can append a specific tag to the path and pass this information to the interconnect platform driver to do the aggregation based on this state. Introduce icc_set_tag() function that will allow the consumers to append an optional tag to each path. The aggregation of these tagged paths is platform specific. Reviewed-by: Evan Green <evgreen@chromium.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
2019-01-22interconnect: Allow endpoints translation via DTGeorgi Djakov1-0/+7
Currently we support only platform data for specifying the interconnect endpoints. As now the endpoints are hard-coded into the consumer driver this may lead to complications when a single driver is used by multiple SoCs, which may have different interconnect topology. To avoid cluttering the consumer drivers, introduce a translation function to help us get the board specific interconnect data from device-tree. Reviewed-by: Evan Green <evgreen@chromium.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-22interconnect: Add generic on-chip interconnect APIGeorgi Djakov1-0/+52
This patch introduces a new API to get requirements and configure the interconnect buses across the entire chipset to fit with the current demand. The API is using a consumer/provider-based model, where the providers are the interconnect buses and the consumers could be various drivers. The consumers request interconnect resources (path) between endpoints and set the desired constraints on this data flow path. The providers receive requests from consumers and aggregate these requests for all master-slave pairs on that path. Then the providers configure each node along the path to support a bandwidth that satisfies all bandwidth requests that cross through that node. The topology could be complicated and multi-tiered and is SoC specific. Reviewed-by: Evan Green <evgreen@chromium.org> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>