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authorEduardo Valentin <edubezval@gmail.com>2014-12-04 07:11:43 +0300
committerEduardo Valentin <edubezval@gmail.com>2014-12-08 19:08:53 +0300
commit0f1be51c358f740fe5183bd0bcd60076fdfb53d0 (patch)
treefcfa99069607e0d7d2562bb7136804b6f94a16db /drivers/thermal/ti-soc-thermal
parent88910638717dd195cff1dd1ea74772b159632bba (diff)
downloadlinux-0f1be51c358f740fe5183bd0bcd60076fdfb53d0.tar.xz
thermal: cpu_cooling: check for the readiness of cpufreq layer
In this patch, the cpu_cooling code checks for the usability of cpufreq layer before proceeding with the CPU cooling device registration. The main reason is: CPU cooling device is not usable if cpufreq cannot switch frequencies. Similar checks are spread in thermal drivers. Thus, the advantage now is to have the check in a single place: cpu cooling device registration. For this reason, this patch also updates the existing drivers that depend on CPU cooling to simply propagate the error code of the cpu cooling registration call. Therefore, in case cpufreq is not ready, the thermal drivers will still return -EPROBE_DEFER, in an attempt to try again when cpufreq layer gets ready. Cc: devicetree@vger.kernel.org Cc: Grant Likely <grant.likely@linaro.org> Cc: Kukjin Kim <kgene.kim@samsung.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: linux-pm@vger.kernel.org Cc: linux-samsung-soc@vger.kernel.org Cc: Naveen Krishna Chatradhi <ch.naveen@samsung.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Zhang Rui <rui.zhang@intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'drivers/thermal/ti-soc-thermal')
-rw-r--r--drivers/thermal/ti-soc-thermal/ti-thermal-common.c6
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c
index 9eec26dc0448..5f07d7e3a198 100644
--- a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c
+++ b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c
@@ -28,7 +28,6 @@
#include <linux/kernel.h>
#include <linux/workqueue.h>
#include <linux/thermal.h>
-#include <linux/cpufreq.h>
#include <linux/cpumask.h>
#include <linux/cpu_cooling.h>
#include <linux/of.h>
@@ -403,11 +402,6 @@ int ti_thermal_register_cpu_cooling(struct ti_bandgap *bgp, int id)
if (!data)
return -EINVAL;
- if (!cpufreq_get_current_driver()) {
- dev_dbg(bgp->dev, "no cpufreq driver yet\n");
- return -EPROBE_DEFER;
- }
-
/* Register cooling device */
data->cool_dev = cpufreq_cooling_register(cpu_present_mask);
if (IS_ERR(data->cool_dev)) {