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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2016-04-27 05:22:24 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-04-28 15:22:42 +0200 |
| commit | 1530b9963eeb5304d9aec48ee0e7ea966d7cf3d9 (patch) | |
| tree | ede2126133df90354238cc3285ae7f702269e270 /drivers/cpufreq/cpufreq-dt.c | |
| parent | Merge back earlier cpufreq material for v4.7. (diff) | |
| download | linux-1530b9963eeb5304d9aec48ee0e7ea966d7cf3d9.tar.xz linux-1530b9963eeb5304d9aec48ee0e7ea966d7cf3d9.zip | |
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>
Diffstat (limited to 'drivers/cpufreq/cpufreq-dt.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq-dt.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c index 5f8dbe640a20..aca9bec00f91 100644 --- a/drivers/cpufreq/cpufreq-dt.c +++ b/drivers/cpufreq/cpufreq-dt.c @@ -147,7 +147,7 @@ static int cpufreq_init(struct cpufreq_policy *policy) struct clk *cpu_clk; struct dev_pm_opp *suspend_opp; unsigned int transition_latency; - bool opp_v1 = false; + bool fallback = false; const char *name; int ret; @@ -167,14 +167,16 @@ static int cpufreq_init(struct cpufreq_policy *policy) /* Get OPP-sharing information from "operating-points-v2" bindings */ ret = dev_pm_opp_of_get_sharing_cpus(cpu_dev, policy->cpus); if (ret) { + if (ret != -ENOENT) + goto out_put_clk; + /* * 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) - opp_v1 = true; - else - goto out_put_clk; + if (dev_pm_opp_get_sharing_cpus(cpu_dev, policy->cpus)) + fallback = true; } /* @@ -214,7 +216,7 @@ static int cpufreq_init(struct cpufreq_policy *policy) goto out_free_opp; } - if (opp_v1) { + if (fallback) { struct cpufreq_dt_platform_data *pd = cpufreq_get_driver_data(); if (!pd || !pd->independent_clocks) |