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MIPS/loongson2_cpufreq: Fix CPU clock rate setting 

Loongson2 has been using (incorrectly) kHz for cpu_clk rate. This has
been unnoticed, as loongson2_cpufreq was the only place where the rate
was set/get. After commit 652ed95d5f
(cpufreq: introduce cpufreq_generic_get() routine) things however broke,
and now loops_per_jiffy adjustments are incorrect (1000 times too long).
The patch fixes this by changing cpu_clk rate to Hz.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: stable@vger.kernel.org
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: cpufreq@vger.kernel.org
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Patchwork: https://patchwork.linux-mips.org/patch/6678/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
hifive-unleashed-5.1
Aaro Koskinen 2014-04-03 22:24:01 +03:00 committed by Ralf Baechle
parent 3deff25331
commit 8e8acb3296
2 changed files with 5 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/mips/loongson/lemote-2f/clock.c
View File

@ -91,6 +91,7 @@ EXPORT_SYMBOL(clk_put);
int clk_set_rate(struct clk *clk, unsigned long rate)
{
unsigned int rate_khz = rate / 1000;
int ret = 0;
int regval;
int i;
@ -111,10 +112,10 @@ int clk_set_rate(struct clk *clk, unsigned long rate)
if (loongson2_clockmod_table[i].frequency ==
CPUFREQ_ENTRY_INVALID)
continue;
if (rate == loongson2_clockmod_table[i].frequency)
if (rate_khz == loongson2_clockmod_table[i].frequency)
break;
}
if (rate != loongson2_clockmod_table[i].frequency)
if (rate_khz != loongson2_clockmod_table[i].frequency)
return -ENOTSUPP;
clk->rate = rate;

4
drivers/cpufreq/loongson2_cpufreq.c
View File

@ -62,7 +62,7 @@ static int loongson2_cpufreq_target(struct cpufreq_policy *policy,
set_cpus_allowed_ptr(current, &cpus_allowed);
/* setting the cpu frequency */
clk_set_rate(policy->clk, freq);
clk_set_rate(policy->clk, freq * 1000);
return 0;
}
@ -92,7 +92,7 @@ static int loongson2_cpufreq_cpu_init(struct cpufreq_policy *policy)
i++)
loongson2_clockmod_table[i].frequency = (rate * i) / 8;
ret = clk_set_rate(cpuclk, rate);
ret = clk_set_rate(cpuclk, rate * 1000);
if (ret) {
clk_put(cpuclk);
return ret;