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cpufreq: dt: Identify cpu-sharing for platforms without operating-points-v2 

Existing platforms, which do not support operating-points-v2, can
explicitly tell the opp core that some of the CPUs share opp tables,
with help of dev_pm_opp_set_sharing_cpus().

For such platforms, explicitly ask the opp core to provide list of CPUs
sharing the opp table with current cpu device, before falling back to
platform data.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2016-04-27 08:52:24 +05:30 committed by Rafael J. Wysocki
parent 29c5e7b2bc
commit 1530b9963e
1 changed files with 9 additions and 7 deletions
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16
drivers/cpufreq/cpufreq-dt.c
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@ -147,7 +147,7 @@ static int cpufreq_init(struct cpufreq_policy *policy)
struct clk *cpu_clk; struct clk *cpu_clk;
struct dev_pm_opp *suspend_opp; struct dev_pm_opp *suspend_opp;
unsigned int transition_latency; unsigned int transition_latency;
bool opp_v1 = false; bool fallback = false;
const char *name; const char *name;
int ret; int ret;
@ -167,14 +167,16 @@ static int cpufreq_init(struct cpufreq_policy *policy)
/* Get OPP-sharing information from "operating-points-v2" bindings */ /* Get OPP-sharing information from "operating-points-v2" bindings */
ret = dev_pm_opp_of_get_sharing_cpus(cpu_dev, policy->cpus); ret = dev_pm_opp_of_get_sharing_cpus(cpu_dev, policy->cpus);
if (ret) { if (ret) {
if (ret != -ENOENT)
goto out_put_clk;
/* /*
* operating-points-v2 not supported, fallback to old method of * operating-points-v2 not supported, fallback to old method of
* finding shared-OPPs for backward compatibility. * finding shared-OPPs for backward compatibility if the
* platform hasn't set sharing CPUs.
*/ */
if (ret == -ENOENT) if (dev_pm_opp_get_sharing_cpus(cpu_dev, policy->cpus))
opp_v1 = true; fallback = true;
else
goto out_put_clk;
} }
/* /*
@ -214,7 +216,7 @@ static int cpufreq_init(struct cpufreq_policy *policy)
goto out_free_opp; goto out_free_opp;
} }
if (opp_v1) { if (fallback) {
struct cpufreq_dt_platform_data *pd = cpufreq_get_driver_data(); struct cpufreq_dt_platform_data *pd = cpufreq_get_driver_data();
if (!pd || !pd->independent_clocks) if (!pd || !pd->independent_clocks)