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authorViresh Kumar <viresh.kumar@linaro.org>2016-04-27 06:22:24 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-04-28 16:22:42 +0300
commit1530b9963eeb5304d9aec48ee0e7ea966d7cf3d9 (patch)
treeede2126133df90354238cc3285ae7f702269e270 /drivers/cpufreq/cpufreq-dt.c
parent29c5e7b2bc875c4ad5d3fd9e3c4ed2702e705bba (diff)
downloadlinux-1530b9963eeb5304d9aec48ee0e7ea966d7cf3d9.tar.xz
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.c16
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)