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From: Soren Brinkmann <soren.brinkmann@xilinx.com>
To: Mike Turquette <mturquette@linaro.org>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Viresh Kumar <viresh.kumar@linaro.org>,
	Russell King <linux@arm.linux.org.uk>
Cc: "Michal Simek" <michal.simek@xilinx.com>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
	cpufreq@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	"Soren Brinkmann" <soren.brinkmann@xilinx.com>
Subject: [RFC PATCH 1/5] cpufreq: stats: Allow small rounding errors
Date: Wed, 14 May 2014 15:30:51 -0700	[thread overview]
Message-ID: <1400106655-22465-2-git-send-email-soren.brinkmann@xilinx.com> (raw)
In-Reply-To: <1400106655-22465-1-git-send-email-soren.brinkmann@xilinx.com>

When matching a frequency against the freq_table, allow small deviances to
allow rounding errors. Rounding errors are likely to occur due to the
differenct frequency resolutions used in the common clock vs cpufreq
frameworks.

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
---

 drivers/cpufreq/cpufreq_stats.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index ecaaebf969fc..37a34178ab3a 100644
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -146,7 +146,7 @@ static int freq_table_get_index(struct cpufreq_stats *stat, unsigned int freq)
 {
 	int index;
 	for (index = 0; index < stat->max_state; index++)
-		if (stat->freq_table[index] == freq)
+		if (abs(stat->freq_table[index] - freq) < 2)
 			return index;
 	return -1;
 }
-- 
1.9.3.1.ga73a6ad


  reply	other threads:[~2014-05-14 22:34 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-14 22:30 [RFC PATCH 0/5] Frequency resolution in CCF vs. cpufreq Soren Brinkmann
2014-05-14 22:30 ` Soren Brinkmann [this message]
2014-05-14 22:30 ` [RFC PATCH 2/5] clk: Introduce 'clk_round_rate_nearest()' Soren Brinkmann
2014-05-15  7:38   ` Uwe Kleine-König
2014-05-15 14:10     ` Sören Brinkmann
2014-05-19  0:51     ` Sören Brinkmann
2014-05-19 16:19       ` Uwe Kleine-König
2014-05-19 16:41         ` Sören Brinkmann
2014-05-19 17:29           ` Sören Brinkmann
2014-05-20  7:51             ` Uwe Kleine-König
2014-05-20  7:33           ` Uwe Kleine-König
2014-05-20 16:01             ` Sören Brinkmann
2014-05-20 17:48               ` Stephen Boyd
2014-05-20 21:48                 ` Sören Brinkmann
2014-05-21  7:34                   ` Uwe Kleine-König
2014-05-21 15:58                     ` Sören Brinkmann
2014-05-21 18:23                       ` Uwe Kleine-König
2014-05-21 20:19                         ` Sören Brinkmann
2014-05-21 20:33                         ` Mike Turquette
2014-05-22 18:03                           ` Sören Brinkmann
2014-05-22 18:20                             ` Uwe Kleine-König
2014-05-22 20:32                               ` Sören Brinkmann
2014-05-22 21:03                                 ` Mike Turquette
2014-05-22 23:44                                   ` Sören Brinkmann
     [not found]                                     ` <20140523013732.9521.70820@quantum>
2014-05-23 16:14                                       ` Sören Brinkmann
2014-05-26  6:29                                         ` Viresh Kumar
2014-05-26 11:22                                           ` Rafael J. Wysocki
2014-05-26 11:07                                             ` Viresh Kumar
2014-05-26 11:47                                               ` Rafael J. Wysocki
2014-05-26 21:52                                                 ` Sören Brinkmann
2014-05-28  2:05                                             ` Mike Turquette
2014-05-28 16:17                                               ` Rafael J. Wysocki
2014-06-07  0:44                               ` Sören Brinkmann
2014-05-14 22:30 ` [RFC PATCH 3/5] cpufreq: cpu0: Use clk_round_rate_nearest() Soren Brinkmann
2014-05-14 22:30 ` [RFC PATCH 4/5] ARM: zynq: dt: Use properly rounded frequencies in OPPs Soren Brinkmann
2014-05-14 22:30 ` [RFC PATCH 5/5] net: macb: Use clk_round_rate_nearest() API Soren Brinkmann
2014-05-15  6:12 ` [RFC PATCH 0/5] Frequency resolution in CCF vs. cpufreq Viresh Kumar
2014-05-15 14:05   ` Sören Brinkmann
2014-05-15  7:47 ` Uwe Kleine-König
2014-05-15 12:14   ` Nishanth Menon
2014-05-15 14:00   ` Sören Brinkmann

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