kernel/linux.git/include/linux/pm_opp.h, branch v6.19.11

OPP: Add support to find OPP for a set of keys

2025-08-26T05:10:58+00:00

Some clients, such as PCIe, may operate at the same clock frequency across different data rates by varying link width. In such cases, frequency alone is not sufficient to uniquely identify an OPP. To support these scenarios, introduce a new API dev_pm_opp_find_key_exact() that allows OPP lookup with different set of keys like freq, level & bandwidth. Signed-off-by: Krishna Chaitanya Chundru [ Viresh: Minor cleanups ] Signed-off-by: Viresh Kumar

OPP: Add dev_pm_opp_set_level()

2025-05-02T05:33:18+00:00

To configure a device to a specific performance level, consumer drivers currently need to determine the OPP based on the exact level and then set it, resulting in code duplication across drivers. The new helper API, dev_pm_opp_set_level(), addresses this issue by providing a streamlined method for consumer drivers to find and set the OPP based on the desired performance level, thereby eliminating redundancy. Signed-off-by: Praveen Talari [ Viresh: Lot of fixes in the code, and rebased over latest changes. Fixed commit log too. ] Signed-off-by: Viresh Kumar

OPP: Define and use scope-based cleanup helpers

2025-05-02T05:25:40+00:00

Define and use scope-based cleanup helpers for `struct opp` and `struct opp_table`. No intentional functional impact. Signed-off-by: Viresh Kumar

OPP: Return opp_table from dev_pm_opp_get_opp_table_ref()

2025-04-24T10:35:56+00:00

For convenience of users, return back the pointer to the opp_table from dev_pm_opp_get_opp_table_ref(), so they can do: opp_table = dev_pm_opp_get_opp_table_ref(tmp_table); No intentional functional impact. Signed-off-by: Viresh Kumar

OPP: Return opp from dev_pm_opp_get()

2025-04-24T10:35:53+00:00

For convenience of users, return back the pointer to the opp from dev_pm_opp_get(), so they can do: opp = dev_pm_opp_get(tmp_opp); No intentional functional impact. Signed-off-by: Viresh Kumar

PM / OPP: Add reference counting helpers for Rust implementation

2025-01-20T03:35:51+00:00

To ensure that resources such as OPP tables or OPP nodes are not freed while in use by the Rust implementation, it is necessary to increment their reference count from Rust code. This commit introduces a new helper function, dev_pm_opp_get_opp_table_ref(), to increment the reference count of an OPP table and declares the existing helper dev_pm_opp_get() in pm_opp.h. Signed-off-by: Viresh Kumar

opp: core: implement dev_pm_opp_get_bw

2024-12-23T10:57:22+00:00

Add and implement dev_pm_opp_get_bw() to retrieve the OPP's bandwidth in the same way as the dev_pm_opp_get_voltage() helper. Retrieving bandwidth is required in the case of the Adreno GPU where the GPU Management Unit can handle the Bandwidth scaling. The helper can get the peak or average bandwidth for any of the interconnect path. Signed-off-by: Neil Armstrong [ Viresh: Fixed commit log and a comment in code ] Signed-off-by: Viresh Kumar

OPP: Drop redundant *_opp_attach|detach_genpd()

2024-10-10T12:24:30+00:00

All users of *_opp_attach|detach_genpd(), have been converted to use dev|devm_pm_domain_attach|detach_list(), hence let's drop it along with its corresponding exported functions. Acked-by: Viresh Kumar Signed-off-by: Ulf Hansson Link: https://lore.kernel.org/r/20241002122232.194245-12-ulf.hansson@linaro.org

OPP: Rework _set_required_devs() to manage a single device per call

2024-10-10T12:11:41+00:00

At this point there are no consumer drivers that makes use of _set_required_devs(), hence it should be straightforward to rework the code to enable it to better integrate with the PM domain attach procedure. During attach, one device at the time is being hooked up to its corresponding PM domain. Therefore, let's update the _set_required_devs() to align to this behaviour, allowing callers to fill out one required_dev per call. Subsequent changes starts making use of this. Signed-off-by: Ulf Hansson Acked-by: Viresh Kumar Link: https://lore.kernel.org/r/20241002122232.194245-4-ulf.hansson@linaro.org

OPP: Introduce an OF helper function to inform if required-opps is used

2024-06-26T05:47:20+00:00

As being shown from a subsequent change to genpd, it's useful to understand if a device's OF node has an OPP-table described and whether it contains OPP nodes that makes use of the required-opps DT property. For this reason, let's introduce an OPP OF helper function called dev_pm_opp_of_has_required_opp(). Signed-off-by: Ulf Hansson Signed-off-by: Viresh Kumar