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firmware: arm_scmi: add a getter for power of performance states

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The SCMI protocol can be used to get power estimates from firmware
corresponding to each performance state of a device. Although these power
costs are already managed by the SCMI firmware driver, they are not
exposed to any external subsystem yet.

Fix this by adding a new get_power() interface to the exisiting perf_ops
defined for the SCMI protocol.

Signed-off-by: Quentin Perret <quentin.perret@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Quentin Perret
2018-09-10 17:28:10 +01:00
committed by Sudeep Holla
parent ca64b719a1
commit 1a63fe9a2b
2 changed files with 32 additions and 0 deletions
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4
include/linux/scmi_protocol.h
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@@ -91,6 +91,8 @@ struct scmi_clk_ops {
* to sustained performance level mapping
* @freq_get: gets the frequency for a given device using sustained frequency
* to sustained performance level mapping
* @est_power_get: gets the estimated power cost for a given performance domain
* at a given frequency
*/
struct scmi_perf_ops {
int (*limits_set)(const struct scmi_handle *handle, u32 domain,
@@ -110,6 +112,8 @@ struct scmi_perf_ops {
unsigned long rate, bool poll);
int (*freq_get)(const struct scmi_handle *handle, u32 domain,
unsigned long *rate, bool poll);
int (*est_power_get)(const struct scmi_handle *handle, u32 domain,
unsigned long *rate, unsigned long *power);
};
/**