Add hotplug and secondary startup entry point to cold or warm boot
secondary cpus.
Signed-off-by: Mahesh Sivasubramanian <msivasub@xxxxxxxxxxxxxx>
Signed-off-by: Lina Iyer <lina.iyer@xxxxxxxxxx>
---
drivers/soc/qcom/msm-pm.c | 36 ++++++++++++++++++++++++++++++++++++
include/soc/qcom/pm.h | 4 ++++
2 files changed, 40 insertions(+)
diff --git a/drivers/soc/qcom/msm-pm.c b/drivers/soc/qcom/msm-pm.c
index 17a7c8c..4a6471d 100644
--- a/drivers/soc/qcom/msm-pm.c
+++ b/drivers/soc/qcom/msm-pm.c
@@ -216,3 +216,39 @@ bool msm_cpu_pm_enter_sleep(enum msm_pm_sleep_mode mode, bool from_idle)
return exit_stat;
}
EXPORT_SYMBOL(msm_cpu_pm_enter_sleep);
+
+/**
+ * msm_pm_cpu_hotplug_enter - Entry point for SoC hotplug interface
+ * Set up cores to enter deeper sleep modes than just clock gating
+ * Find the best deepest low power mode that can enter
+ *
+ * @cpu - The cpu that is being hotplugged off
+ */
+int msm_pm_cpu_hotplug_enter(unsigned int cpu)
+{
+ enum msm_pm_sleep_mode mode = MSM_PM_SLEEP_MODE_NR;
+ int ret;
+
+ if (msm_spm_is_mode_avail(MSM_SPM_MODE_POWER_COLLAPSE))
+ mode = MSM_PM_SLEEP_MODE_POWER_COLLAPSE;
+ else if (msm_spm_is_mode_avail( MSM_SPM_MODE_RETENTION))
+ mode = MSM_PM_SLEEP_MODE_RETENTION;
+ else
+ mode = MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT;
+
+ ret = msm_cpu_pm_enter_sleep(mode, false) ? 0 : -EFAULT;
+
+ return ret;
+}
+EXPORT_SYMBOL(msm_pm_cpu_hotplug_enter);
+
+/**
+ * msm_pm_secondary_startup() - Restore after hotplug resume
+ *
+ * @ cpu: the cpu thats coming up.
+ */
+int msm_pm_secondary_startup(unsigned int cpu)
+{
+ return msm_spm_set_low_power_mode(MSM_SPM_MODE_CLOCK_GATING, false);
+}
+EXPORT_SYMBOL(msm_pm_secondary_startup);
diff --git a/include/soc/qcom/pm.h b/include/soc/qcom/pm.h
index 01872ad..ed6124a 100644
--- a/include/soc/qcom/pm.h
+++ b/include/soc/qcom/pm.h
@@ -30,10 +30,14 @@ enum msm_pm_l2_scm_flag {
#ifdef CONFIG_QCOM_PM
bool msm_cpu_pm_enter_sleep(enum msm_pm_sleep_mode mode, bool from_idle);
+int msm_pm_cpu_hotplug_enter(unsigned int cpu);
+int msm_pm_secondary_startup(unsigned int cpu);
#else
static inline bool msm_cpu_pm_enter_sleep(enum msm_pm_sleep_mode mode,
bool from_idle)
{ return true; }
+static inline int msm_pm_cpu_hotplug_enter(unsigned int cpu) { return 0; }
+static inline int msm_pm_secondary_startup(unsigned int cpu) { return 0; }
#endif
#endif /* __QCOM_PM_H */
--
1.9.1
--
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