[PATCH] cpufreq: vexpress: Set CPUFREQ_IS_COOLING_DEV flag

From: Viresh Kumar
Date: Wed Aug 11 2021 - 01:21:11 EST


Reuse the cpufreq core's registration of cooling device by setting the
CPUFREQ_IS_COOLING_DEV flag. Set this only if bL switcher isn't enabled.

Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
---
Sudeep, is this broken ? I wonder why we didn't do it earlier.

drivers/cpufreq/vexpress-spc-cpufreq.c | 22 +++-------------------
1 file changed, 3 insertions(+), 19 deletions(-)

diff --git a/drivers/cpufreq/vexpress-spc-cpufreq.c b/drivers/cpufreq/vexpress-spc-cpufreq.c
index 28c4c3254337..618b263434ca 100644
--- a/drivers/cpufreq/vexpress-spc-cpufreq.c
+++ b/drivers/cpufreq/vexpress-spc-cpufreq.c
@@ -15,7 +15,6 @@
#include <linux/cpu.h>
#include <linux/cpufreq.h>
#include <linux/cpumask.h>
-#include <linux/cpu_cooling.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/mutex.h>
@@ -47,7 +46,6 @@ static bool bL_switching_enabled;
#define ACTUAL_FREQ(cluster, freq) ((cluster == A7_CLUSTER) ? freq << 1 : freq)
#define VIRT_FREQ(cluster, freq) ((cluster == A7_CLUSTER) ? freq >> 1 : freq)

-static struct thermal_cooling_device *cdev[MAX_CLUSTERS];
static struct clk *clk[MAX_CLUSTERS];
static struct cpufreq_frequency_table *freq_table[MAX_CLUSTERS + 1];
static atomic_t cluster_usage[MAX_CLUSTERS + 1];
@@ -455,11 +453,6 @@ static int ve_spc_cpufreq_exit(struct cpufreq_policy *policy)
struct device *cpu_dev;
int cur_cluster = cpu_to_cluster(policy->cpu);

- if (cur_cluster < MAX_CLUSTERS) {
- cpufreq_cooling_unregister(cdev[cur_cluster]);
- cdev[cur_cluster] = NULL;
- }
-
cpu_dev = get_cpu_device(policy->cpu);
if (!cpu_dev) {
pr_err("%s: failed to get cpu%d device\n", __func__,
@@ -471,17 +464,6 @@ static int ve_spc_cpufreq_exit(struct cpufreq_policy *policy)
return 0;
}

-static void ve_spc_cpufreq_ready(struct cpufreq_policy *policy)
-{
- int cur_cluster = cpu_to_cluster(policy->cpu);
-
- /* Do not register a cpu_cooling device if we are in IKS mode */
- if (cur_cluster >= MAX_CLUSTERS)
- return;
-
- cdev[cur_cluster] = of_cpufreq_cooling_register(policy);
-}
-
static struct cpufreq_driver ve_spc_cpufreq_driver = {
.name = "vexpress-spc",
.flags = CPUFREQ_HAVE_GOVERNOR_PER_POLICY |
@@ -492,7 +474,6 @@ static struct cpufreq_driver ve_spc_cpufreq_driver = {
.get = ve_spc_cpufreq_get_rate,
.init = ve_spc_cpufreq_init,
.exit = ve_spc_cpufreq_exit,
- .ready = ve_spc_cpufreq_ready,
.attr = cpufreq_generic_attr,
};

@@ -552,6 +533,9 @@ static int ve_spc_cpufreq_probe(struct platform_device *pdev)
for (i = 0; i < MAX_CLUSTERS; i++)
mutex_init(&cluster_lock[i]);

+ if (!is_bL_switching_enabled())
+ ve_spc_cpufreq_driver.flags |= CPUFREQ_IS_COOLING_DEV;
+
ret = cpufreq_register_driver(&ve_spc_cpufreq_driver);
if (ret) {
pr_info("%s: Failed registering platform driver: %s, err: %d\n",
--
2.31.1.272.g89b43f80a514