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| author | Pierre Gondois <pierre.gondois@arm.com> | 2024-02-22 16:57:00 +0300 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2024-03-06 08:24:21 +0300 |
| commit | 2441caa84aac8abf1be9e20db3e6bb921e74c8a2 (patch) | |
| tree | b4f817ad2b7898f091de8b37513d9482486c405d /include/linux/scmi_protocol.h | |
| parent | ad86f7e959dc1814c3b2bcbeb08c3c02214110a7 (diff) | |
| download | linux-2441caa84aac8abf1be9e20db3e6bb921e74c8a2.tar.xz | |
firmware: arm_scmi: Populate fast channel rate_limit
Arm SCMI spec. v3.2, s4.5.3.12 PERFORMANCE_DESCRIBE_FASTCHANNEL
defines a per-domain rate_limit for performance requests:
"""
Rate Limit in microseconds, indicating the minimum time
required between successive requests. A value of 0
indicates that this field is not applicable or supported
on the platform.
""""
The field is first defined in SCMI v2.0.
Add support to fetch this value and advertise it through
a fast_switch_rate_limit() callback.
Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'include/linux/scmi_protocol.h')
| -rw-r--r-- | include/linux/scmi_protocol.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index acd956ffcb84..fafedb3b6604 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -139,6 +139,8 @@ struct scmi_perf_domain_info { * at a given frequency * @fast_switch_possible: indicates if fast DVFS switching is possible or not * for a given device + * @fast_switch_rate_limit: gets the minimum time (us) required between + * successive fast_switching requests * @power_scale_mw_get: indicates if the power values provided are in milliWatts * or in some other (abstract) scale */ @@ -168,6 +170,8 @@ struct scmi_perf_proto_ops { unsigned long *rate, unsigned long *power); bool (*fast_switch_possible)(const struct scmi_protocol_handle *ph, u32 domain); + int (*fast_switch_rate_limit)(const struct scmi_protocol_handle *ph, + u32 domain, u32 *rate_limit); enum scmi_power_scale (*power_scale_get)(const struct scmi_protocol_handle *ph); }; |