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firmware: arm_scmi: Add fast_switch_possible() interface

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Add a new fast_switch_possible interface to the existing perf_ops to
export the information of whether or not fast_switch is possible for a
given device.

This can be used by the cpufreq driver and framework to choose proper
mechanism for frequency change.

Link: https://lore.kernel.org/r/20200617094332.8391-1-nicola.mazzucato@arm.com
Suggested-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Nicola Mazzucato <nicola.mazzucato@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Nicola Mazzucato
2020-06-17 10:43:31 +01:00
committed by Sudeep Holla
parent bad0d73b65
commit 1909872ff2
2 changed files with 14 additions and 0 deletions
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2
include/linux/scmi_protocol.h
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@@ -118,6 +118,8 @@ struct scmi_perf_ops {
unsigned long *rate, bool poll);
int (*est_power_get)(const struct scmi_handle *handle, u32 domain,
unsigned long *rate, unsigned long *power);
bool (*fast_switch_possible)(const struct scmi_handle *handle,
struct device *dev);
};
/**