[PATCH v15 2/3] cpufreq: Add of_perf_domain_get_sharing_cpumask
Viresh Kumar
viresh.kumar at linaro.org
Mon Sep 6 02:43:09 PDT 2021
On 03-09-21, 16:39, Hector Yuan wrote:
> From: "Hector.Yuan" <hector.yuan at mediatek.com>
>
> Add of_perf_domain_get_sharing_cpumask function to group cpu
> to specific performance domain.
>
> Signed-off-by: Hector.Yuan <hector.yuan at mediatek.com>
> ---
> include/linux/cpufreq.h | 46 +++++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 45 insertions(+), 1 deletion(-)
To speed things up, I have applied this with following changes. Please
test my branch and see if something breaks:
https://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm.git/log/?h=cpufreq/arm/linux-next
--
viresh
-------------------------8<-------------------------
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 9eb1fa17a8a4..acd3ee5b8b0a 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -1006,37 +1006,49 @@ static inline int cpufreq_table_count_valid_entries(const struct cpufreq_policy
return count;
}
-static inline int of_perf_domain_get_sharing_cpumask(int pcpu, const char *list_name,
- const char *cell_name, struct cpumask *cpumask)
+static inline int parse_perf_domain(int cpu, const char *list_name,
+ const char *cell_name)
{
struct device_node *cpu_np;
struct of_phandle_args args;
+ int ret;
+
+ cpu_np = of_cpu_device_node_get(cpu);
+ if (!cpu_np)
+ return -ENODEV;
+
+ ret = of_parse_phandle_with_args(cpu_np, list_name, cell_name, 0,
+ &args);
+ if (ret < 0)
+ return ret;
+
+ of_node_put(cpu_np);
+
+ return args.args[0];
+}
+
+static inline int of_perf_domain_get_sharing_cpumask(int pcpu, const char *list_name,
+ const char *cell_name, struct cpumask *cpumask)
+{
int target_idx;
int cpu, ret;
- cpu_np = of_cpu_device_node_get(pcpu);
- of_parse_phandle_with_args(cpu_np, list_name,
- cell_name, 0, &args);
- of_node_put(cpu_np);
- target_idx = args.args[0];
+ ret = parse_perf_domain(pcpu, list_name, cell_name);
+ if (ret < 0)
+ return ret;
+
+ target_idx = ret;
+ cpumask_set_cpu(pcpu, cpumask);
for_each_possible_cpu(cpu) {
if (cpu == pcpu)
continue;
- cpu_np = of_cpu_device_node_get(cpu);
- if (!cpu_np)
- continue;
-
- ret = of_parse_phandle_with_args(cpu_np, list_name,
- cell_name, 0,
- &args);
-
- of_node_put(cpu_np);
+ ret = parse_perf_domain(pcpu, list_name, cell_name);
if (ret < 0)
continue;
- if (target_idx == args.args[0])
+ if (target_idx == ret)
cpumask_set_cpu(cpu, cpumask);
}
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