[PATCH 07/10] cpufreq: dt: Identify cpu-sharing for platforms without operating-points-v2

Viresh Kumar
2016-04-21T08:59:47Z

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>
---
drivers/cpufreq/cpufreq-dt.c | 16 +++++++++-------
1 file 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)
--
2.7.1.410.g6faf27b