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SubjectRe: [PATCH V4 4/4] thermal/drivers/cpu_cooling: Rename to cpufreq_cooling
Date
I tested this on the librem5-devkit and see the
cooling devices in sysfs. I configure ARM_PSCI_CPUIDLE, not ARM_CPUIDLE and
add the patch below in register the cooling device there. "psci_idle"
is listed as the cpuidle_driver.

That's what I'm running, in case you want to see it all:
https://source.puri.sm/martin.kepplinger/linux-next/commits/next-20191205/librem5_cpuidle_mainline_atf

so I add a trip temperature description like this:
https://source.puri.sm/martin.kepplinger/linux-next/commit/361f49f93ae2c477fd012790831cabd0ed976660

When I let the SoC heat up, cpuidle cooling won't kick it. In sysfs:

catting the relevant files in /sys/class/thermal after heating up,
if that makes sense:

87000
85000
85000
thermal-cpufreq-0
1
thermal-idle-0
0
thermal-idle-1
0
thermal-idle-2
0
thermal-idle-3
0

with ARM_CPUIDLE instead of ARM_PSCI_CPUIDLE (and registering the cooling dev
during cpuidle-arm.c init) I won't have a cpuidle driver and thus no cpu-sleep
state at all.

Can you see where the problem here lies?

thanks!

martin

---
drivers/cpuidle/cpuidle-psci.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/cpuidle/cpuidle-psci.c b/drivers/cpuidle/cpuidle-psci.c
index f3c1a2396f98..de6e7f444a66 100644
--- a/drivers/cpuidle/cpuidle-psci.c
+++ b/drivers/cpuidle/cpuidle-psci.c
@@ -8,6 +8,7 @@

#define pr_fmt(fmt) "CPUidle PSCI: " fmt

+#include <linux/cpu_cooling.h>
#include <linux/cpuidle.h>
#include <linux/cpumask.h>
#include <linux/cpu_pm.h>
@@ -195,6 +196,8 @@ static int __init psci_idle_init_cpu(int cpu)
if (ret)
goto out_kfree_drv;

+ cpuidle_cooling_register(drv);
+
return 0;

out_kfree_drv:
--
2.20.1
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