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Merge branch 'pm-cpufreq'

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Merge cpufreq fixes and cleanups, mostly on top of those fixes, for
6.18-rc1:

 - Make cpufreq drivers setting the default CPU transition latency to
   CPUFREQ_ETERNAL specify a proper default transition latency value
   instead which addresses a regression introduced during the 6.6 cycle
   that broke CPUFREQ_ETERNAL handling (Rafael Wysocki)

 - Make the cpufreq CPPC driver use a proper transition delay value
   when CPUFREQ_ETERNAL is returned by cppc_get_transition_latency() to
   indicate an error condition (Rafael Wysocki)

 - Make cppc_get_transition_latency() return a negative error code to
   indicate error conditions instead of using CPUFREQ_ETERNAL for this
   purpose and drop CPUFREQ_ETERNAL that has no other users (Rafael
   Wysocki, Gopi Krishna Menon)

 - Fix device leak in the mediatek cpufreq driver (Johan Hovold)

 - Set target frequency on all CPUs sharing a policy during frequency
   updates in the tegra186 cpufreq driver and make it initialize all
   cores to max frequencies (Aaron Kling)

 - Rust cpufreq helper cleanup (Thorsten Blum)

* pm-cpufreq:
  docs/zh_CN: Fix malformed table
  docs/zh_TW: Fix malformed table
  cpufreq: Drop unused symbol CPUFREQ_ETERNAL
  ACPI: CPPC: Do not use CPUFREQ_ETERNAL as an error value
  cpufreq: CPPC: Avoid using CPUFREQ_ETERNAL as transition delay
  cpufreq: Make drivers using CPUFREQ_ETERNAL specify transition latency
  cpufreq: tegra186: Initialize all cores to max frequencies
  cpufreq: tegra186: Set target frequency for all cpus in policy
  rust: cpufreq: streamline find_supply_names
  cpufreq: mediatek: fix device leak on probe failure
This commit is contained in:
Rafael J. Wysocki
2025-10-07 12:31:46 +02:00
parent 05f084d24e 7e8f305a08
commit 53d4d315d4
19 changed files with 83 additions and 60 deletions
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7
rust/kernel/cpufreq.rs
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@@ -38,7 +38,8 @@ use macros::vtable;
const CPUFREQ_NAME_LEN: usize = bindings::CPUFREQ_NAME_LEN as usize;
/// Default transition latency value in nanoseconds.
pub const ETERNAL_LATENCY_NS: u32 = bindings::CPUFREQ_ETERNAL as u32;
pub const DEFAULT_TRANSITION_LATENCY_NS: u32 =
bindings::CPUFREQ_DEFAULT_TRANSITION_LATENCY_NS;
/// CPU frequency driver flags.
pub mod flags {
@@ -399,13 +400,13 @@ impl TableBuilder {
/// The following example demonstrates how to create a CPU frequency table.
///
/// ```
/// use kernel::cpufreq::{ETERNAL_LATENCY_NS, Policy};
/// use kernel::cpufreq::{DEFAULT_TRANSITION_LATENCY_NS, Policy};
///
/// fn update_policy(policy: &mut Policy) {
/// policy
/// .set_dvfs_possible_from_any_cpu(true)
/// .set_fast_switch_possible(true)
/// .set_transition_latency_ns(ETERNAL_LATENCY_NS);
/// .set_transition_latency_ns(DEFAULT_TRANSITION_LATENCY_NS);
///
/// pr_info!("The policy details are: {:?}\n", (policy.cpu(), policy.cur()));
/// }