linux-kernel - [PATCH 2/2] cpufreq: Remove ->resolve

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Date:   Tue, 29 Jun 2021 11:57:08 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Rafael Wysocki <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Jonathan Corbet <corbet@....net>, Alex Shi <alexs@...nel.org>
Cc:     linux-pm@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        TungChen Shih <tung-chen.shih@...iatek.com>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] cpufreq: Remove ->resolve_freq()

commit e3c062360870 ("cpufreq: add cpufreq_driver_resolve_freq()")
introduced this callback, back in 2016, for drivers that provide the
->target() callback.

The kernel haven't seen a single user of the same in the past 5 years
and there is little hope that it will be used anytime soon.

Lets remove it for now.

Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
 Documentation/cpu-freq/cpu-drivers.rst        |  3 ---
 .../zh_CN/cpu-freq/cpu-drivers.rst            |  2 --
 drivers/cpufreq/cpufreq.c                     | 21 +++++++------------
 include/linux/cpufreq.h                       |  9 --------
 4 files changed, 8 insertions(+), 27 deletions(-)

diff --git a/Documentation/cpu-freq/cpu-drivers.rst b/Documentation/cpu-freq/cpu-drivers.rst
index a697278ce190..5ee49820d48a 100644
--- a/Documentation/cpu-freq/cpu-drivers.rst
+++ b/Documentation/cpu-freq/cpu-drivers.rst
@@ -58,9 +58,6 @@ And optionally
 
  .driver_data - cpufreq driver specific data.
 
- .resolve_freq - Returns the most appropriate frequency for a target
- frequency. Doesn't change the frequency though.
-
  .get_intermediate and target_intermediate - Used to switch to stable
  frequency while changing CPU frequency.
 
diff --git a/Documentation/translations/zh_CN/cpu-freq/cpu-drivers.rst b/Documentation/translations/zh_CN/cpu-freq/cpu-drivers.rst
index 0ca2cb646666..f906a4e5a3ac 100644
--- a/Documentation/translations/zh_CN/cpu-freq/cpu-drivers.rst
+++ b/Documentation/translations/zh_CN/cpu-freq/cpu-drivers.rst
@@ -64,8 +64,6 @@ 并且可选择
 
  .driver_data - cpufreq驱动程序的特定数据。
 
- .resolve_freq - 返回最适合目标频率的频率。不过并不能改变频率。
-
  .get_intermediate 和 target_intermediate - 用于在改变CPU频率时切换到稳定
  的频率。
 
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index d691c6c97c79..b106191d84b1 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -527,22 +527,17 @@ EXPORT_SYMBOL_GPL(cpufreq_disable_fast_switch);
 static unsigned int __resolve_freq(struct cpufreq_policy *policy,
 		unsigned int target_freq, unsigned int relation)
 {
-	target_freq = clamp_val(target_freq, policy->min, policy->max);
-	policy->cached_target_freq = target_freq;
+	unsigned int idx;
 
-	if (cpufreq_driver->target_index) {
-		unsigned int idx;
-
-		idx = cpufreq_frequency_table_target(policy, target_freq,
-						     relation);
-		policy->cached_resolved_idx = idx;
-		return policy->freq_table[idx].frequency;
-	}
+	target_freq = clamp_val(target_freq, policy->min, policy->max);
 
-	if (cpufreq_driver->resolve_freq)
-		return cpufreq_driver->resolve_freq(policy, target_freq);
+	if (!cpufreq_driver->target_index)
+		return target_freq;
 
-	return target_freq;
+	idx = cpufreq_frequency_table_target(policy, target_freq, relation);
+	policy->cached_resolved_idx = idx;
+	policy->cached_target_freq = target_freq;
+	return policy->freq_table[idx].frequency;
 }
 
 /**
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 353969c7acd3..18f0ddf7347a 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -330,15 +330,6 @@ struct cpufreq_driver {
 				       unsigned long target_perf,
 				       unsigned long capacity);
 
-	/*
-	 * Caches and returns the lowest driver-supported frequency greater than
-	 * or equal to the target frequency, subject to any driver limitations.
-	 * Does not set the frequency. Only to be implemented for drivers with
-	 * target().
-	 */
-	unsigned int	(*resolve_freq)(struct cpufreq_policy *policy,
-					unsigned int target_freq);
-
 	/*
 	 * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION
 	 * unset.
-- 
2.31.1.272.g89b43f80a514