linux-kernel - Re: [PATCH v2 1/7] ACPI: CPPC: add perf control read API and clarify naming

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Message-ID: <CAJZ5v0jXq48petXAcf1prb5iuHbh3i8XREJBscs88xs5RY_j=A@mail.gmail.com>
Date: Mon, 25 Aug 2025 20:33:59 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Sumit Gupta <sumitg@...dia.com>
Cc: rafael@...nel.org, viresh.kumar@...aro.org, lenb@...nel.org, 
	robert.moore@...el.com, corbet@....net, pierre.gondois@....com, 
	zhenglifeng1@...wei.com, ray.huang@....com, gautham.shenoy@....com, 
	mario.limonciello@....com, perry.yuan@....com, linux-pm@...r.kernel.org, 
	linux-acpi@...r.kernel.org, linux-doc@...r.kernel.org, 
	acpica-devel@...ts.linux.dev, linux-kernel@...r.kernel.org, 
	linux-tegra@...r.kernel.org, treding@...dia.com, jonathanh@...dia.com, 
	vsethi@...dia.com, ksitaraman@...dia.com, sanjayc@...dia.com, 
	bbasu@...dia.com
Subject: Re: [PATCH v2 1/7] ACPI: CPPC: add perf control read API and clarify naming

On Sat, Aug 23, 2025 at 10:02 PM Sumit Gupta <sumitg@...dia.com> wrote:
>
> Add cppc_get_perf_ctrls() to read performance control register values.
> Rename existing APIs for clarity as:
> - To distinguish between:
>   - Feedback counters (fb_ctrs): Read-only performance monitoring data.
>   - Performance controls (perf_ctrls): Read-write config registers.
> - cppc_set_epp_perf() updates both EPP and Autonomous Selection.
>
> API's renamed:
> - cppc_set_perf() to cppc_set_perf_ctrls().
> - cppc_get_perf_ctrs() to cppc_get_perf_fb_ctrs().
> - cppc_get_perf_ctrs_sample() to cppc_get_perf_fb_ctrs_sample().
> - cppc_set_epp_perf() to cppc_set_epp_and_autosel().

> Remove redundant energy_perf field from 'struct cppc_perf_caps' since
> the same information is available in 'struct cppc_perf_ctrls' which is
> actively used.
>
> All existing callers are updated to maintain compatibility.

First, this is too much in one patch IMV and second, I honestly don't
see a reason for the renames above.

This generally makes tracking the code changes history harder.

Thanks!