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msm: thermal: check LMH DCVS devicetree to enable reboot/suspend mitigation

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KTM suspend/reboot frequency mitigation is not required for target
which has LMH DCVS hardware support. lmh_dcvs_available flag in the
KTM is initialized only post OSM driver is up. But during KTM probe,
it checks this flag to register suspend/reboot notifier. Since
it is not initialized, it always register with these notifier and
does frequency mitigation whenever it notifies KTM.

To avoid this, check if the LMH DCVS related devicetree node is
enabled during KTM probe before enabling suspend/reboot notifier
registration. To be safe use the same check in CPU frequency policy
callback for KTM max cpu frequency request as well.

Change-Id: I337477dd296e1e681498d702ab03c164d7554186
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>
This commit is contained in:
Manaf Meethalavalappu Pallikunhi 2017-08-11 18:51:51 +05:30 • committed by Gerrit - the friendly Code Review server
parent 8aedd70842
commit 89fb51f2a7
1 changed files with 4 additions and 2 deletions
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6
drivers/thermal/msm_thermal.c
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@ -200,6 +200,7 @@ static bool cluster_info_probed;
static bool cluster_info_nodes_called;
static bool in_suspend, retry_in_progress;
static bool lmh_dcvs_available;
static bool lmh_dcvs_is_supported;
static int *tsens_id_map;
static int *zone_id_tsens_map;
static DEFINE_MUTEX(vdd_rstr_mutex);
@ -995,7 +996,7 @@ static int msm_thermal_cpufreq_callback(struct notifier_block *nfb,
switch (event) {
case CPUFREQ_ADJUST:
max_freq_req = (lmh_dcvs_available) ? UINT_MAX :
max_freq_req = (lmh_dcvs_is_supported) ? UINT_MAX :
cpus[policy->cpu].parent_ptr->limited_max_freq;
min_freq_req = cpus[policy->cpu].parent_ptr->limited_min_freq;
pr_debug("mitigating CPU%d to freq max: %u min: %u\n",
@ -5379,7 +5380,7 @@ int msm_thermal_init(struct msm_thermal_data *pdata)
if (ret)
pr_err("cannot register cpufreq notifier. err:%d\n", ret);
if (!lmh_dcvs_available) {
if (!lmh_dcvs_is_supported) {
register_reboot_notifier(&msm_thermal_reboot_notifier);
pm_notifier(msm_thermal_suspend_callback, 0);
}
@ -7414,6 +7415,7 @@ static int msm_thermal_dev_probe(struct platform_device *pdev)
if (ret)
goto probe_exit;
lmh_dcvs_is_supported = of_property_read_bool(node, "clock-names");
probe_cc(node, &data, pdev);
probe_freq_mitigation(node, &data, pdev);
probe_cx_phase_ctrl(node, &data, pdev);