linux-kernel - [PATCH 2/4] cpufreq: cpu0: Use clk_find_nearest

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Date:	Mon, 30 Jun 2014 09:56:34 -0700
From:	Soren Brinkmann <soren.brinkmann@...inx.com>
To:	Mike Turquette <mturquette@...aro.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	Russell King <linux@....linux.org.uk>,
	Michal Simek <michal.simek@...inx.com>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, cpufreq@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Soren Brinkmann <soren.brinkmann@...inx.com>
Subject: [PATCH 2/4] cpufreq: cpu0: Use clk_find_nearest_rate()

Round clock frequencies to the nearest possible frequency. Since the
OPPs as specified in DT and the CCF use different a resolution for clock
frequencies, the clk_round_rate() API may return unexpected results, due
to not mandating how rounding has to happen. The clk_find_nearest_rate()
API mitigates such issues and finds the appropriate frequency for
an OPP.

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

 drivers/cpufreq/cpufreq-cpu0.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/cpufreq/cpufreq-cpu0.c b/drivers/cpufreq/cpufreq-cpu0.c
index ee1ae303a07c..1650581f85b6 100644
--- a/drivers/cpufreq/cpufreq-cpu0.c
+++ b/drivers/cpufreq/cpufreq-cpu0.c
@@ -42,7 +42,8 @@ static int cpu0_set_target(struct cpufreq_policy *policy, unsigned int index)
 	long freq_Hz, freq_exact;
 	int ret;
 
-	freq_Hz = clk_round_rate(cpu_clk, freq_table[index].frequency * 1000);
+	freq_Hz = clk_find_nearest_rate(cpu_clk,
+			freq_table[index].frequency * 1000);
 	if (freq_Hz <= 0)
 		freq_Hz = freq_table[index].frequency * 1000;
 
-- 
2.0.1.1.gfbfc394

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