linux-kernel - [PATCH 0/3] scmi-cpufreq: Set transition_delay

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Date: Thu, 22 Feb 2024 14:56:58 +0100
From: Pierre Gondois <pierre.gondois@....com>
To: linux-kernel@...r.kernel.org
Cc: Cristian Marussi <cristian.marussi@....com>,
	Christian Loehle <christian.loehle@....com>,
	Ionela Voinescu <ionela.voinescu@....com>,
	Sudeep Holla <sudeep.holla@....com>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Pierre Gondois <pierre.gondois@....com>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-pm@...r.kernel.org
Subject: [PATCH 0/3]  scmi-cpufreq: Set transition_delay_us

policy's fields definitions:
`transition_delay_us`:
The minimum amount of time between two consecutive freq. requests
for one policy.
`transition_latency`:
Delta between freq. change request and effective freq. change on
the hardware.

cpufreq_policy_transition_delay_us() uses the `transition_delay_us`
value if available. Otherwise a value is induced from the policy's
`transition_latency`.

The scmi-cpufreq driver doesn't populate the `transition_delay_us`.
Values matching the definition are available through the SCMI
specification.
Add support to fetch these values and use them in the scmi-cpufreq
driver.

Pierre Gondois (3):
  firmware: arm_scmi: Populate perf commands rate_limit
  firmware: arm_scmi: Populate fast channel rate_limit
  cpufreq: scmi: Set transition_delay_us

 drivers/cpufreq/scmi-cpufreq.c        | 26 +++++++++++++
 drivers/firmware/arm_scmi/driver.c    |  5 ++-
 drivers/firmware/arm_scmi/perf.c      | 53 +++++++++++++++++++++++++--
 drivers/firmware/arm_scmi/powercap.c  | 12 ++++--
 drivers/firmware/arm_scmi/protocols.h |  4 +-
 include/linux/scmi_protocol.h         |  8 ++++
 6 files changed, 98 insertions(+), 10 deletions(-)

-- 
2.25.1