linux-kernel - [PATCH 05/11] PM / devfreq: governors: Return device frequency limits instead of user limits

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Date:   Fri, 25 May 2018 13:30:37 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     MyungJoo Ham <myungjoo.ham@...sung.com>
Cc:     Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Brian Norris <briannorris@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>
Subject: [PATCH 05/11] PM / devfreq: governors: Return device frequency limits instead of user limits

The performance, powersave and simpleondemand governors can return
df->min/max_freq, which are the user defined frequency limits.
update_devfreq() already takes care of adjusting the target frequency
with the user limits if necessary, therefore we can return
df->scaling_min/max_freq instead, which is the min/max frequency
supported by the device at a given time (depending on the
enabled/disabled OPPs)

Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
---
 drivers/devfreq/governor_performance.c    | 2 +-
 drivers/devfreq/governor_powersave.c      | 2 +-
 drivers/devfreq/governor_simpleondemand.c | 6 +++---
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/devfreq/governor_performance.c b/drivers/devfreq/governor_performance.c
index 1c990cb45098..a8e3478b3c43 100644
--- a/drivers/devfreq/governor_performance.c
+++ b/drivers/devfreq/governor_performance.c
@@ -20,7 +20,7 @@ static int devfreq_performance_func(struct devfreq *df,
 	 * target callback should be able to get floor value as
 	 * said in devfreq.h
 	 */
-	*freq = df->max_freq;
+	*freq = df->scaling_max_freq;
 	return 0;
 }
 
diff --git a/drivers/devfreq/governor_powersave.c b/drivers/devfreq/governor_powersave.c
index 0c42f23249ef..8696efd32e5a 100644
--- a/drivers/devfreq/governor_powersave.c
+++ b/drivers/devfreq/governor_powersave.c
@@ -20,7 +20,7 @@ static int devfreq_powersave_func(struct devfreq *df,
 	 * target callback should be able to get ceiling value as
 	 * said in devfreq.h
 	 */
-	*freq = df->min_freq;
+	*freq = df->scaling_min_freq;
 	return 0;
 }
 
diff --git a/drivers/devfreq/governor_simpleondemand.c b/drivers/devfreq/governor_simpleondemand.c
index 3da7554b4837..805fee09c754 100644
--- a/drivers/devfreq/governor_simpleondemand.c
+++ b/drivers/devfreq/governor_simpleondemand.c
@@ -46,7 +46,7 @@ static int devfreq_simple_ondemand_func(struct devfreq *df,
 
 	/* Assume MAX if it is going to be divided by zero */
 	if (stat->total_time == 0) {
-		*freq = df->max_freq;
+		*freq = df->scaling_max_freq;
 		return 0;
 	}
 
@@ -59,13 +59,13 @@ static int devfreq_simple_ondemand_func(struct devfreq *df,
 	/* Set MAX if it's busy enough */
 	if (stat->busy_time * 100 >
 	    stat->total_time * dfso_upthreshold) {
-		*freq = df->max_freq;
+		*freq = df->scaling_max_freq;
 		return 0;
 	}
 
 	/* Set MAX if we do not know the initial frequency */
 	if (stat->current_frequency == 0) {
-		*freq = df->max_freq;
+		*freq = df->scaling_max_freq;
 		return 0;
 	}
 
-- 
2.17.0.921.gf22659ad46-goog