From: Tushar Nimkar <quic_tnimkar@quicinc.com>
To: "Rafael J . Wysocki" <rafael@kernel.org>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Ulf Hansson <ulf.hansson@linaro.org>
Cc: <linux-pm@vger.kernel.org>, <linux-arm-msm@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <quic_lsrao@quicinc.com>,
<quic_mkshah@quicinc.com>,
Tushar Nimkar <quic_tnimkar@quicinc.com>
Subject: [PATCH 0/2] Add provision to keep idle state disabled
Date: Thu, 8 Jun 2023 14:25:41 +0530 [thread overview]
Message-ID: <20230608085544.16211-1-quic_tnimkar@quicinc.com> (raw)
CPUidle already has CPUIDLE_FLAG_OFF to keep idle state disabled,
Lets extend the support to set this flag using device tree.
This allows to keep an idle state disabled and they can be enabled back using
sysfs after certain point using below command.
echo N > /sys/devices/system/cpu/cpuX/cpuidle/stateX/disable
This helps in cases where vendors want to keep cpuidle off until home
screen comes up. In the past attempt was done at [1] but it was not considered
safe option to export cpu_idle_poll_ctrl().
[1] https://patchwork.kernel.org/project/linux-arm-msm/patch/1637831676-32737-1-git-send-email-quic_mkshah@quicinc.com/
Thanks,
Tushar Nimkar.
Tushar Nimkar (2):
dt-bindings: cpu: idle-states: Add idle-state-disabled property
cpuidle: dt: Add support to keep idle state disabled
Documentation/devicetree/bindings/cpu/idle-states.yaml | 8 ++++++++
drivers/cpuidle/dt_idle_states.c | 3 +++
2 files changed, 11 insertions(+)
--
2.17.1
next reply other threads:[~2023-06-08 8:56 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-08 8:55 Tushar Nimkar [this message]
2023-06-08 8:55 ` [PATCH 1/2] dt-bindings: arm: idle-states: Add idle-state-disabled property Tushar Nimkar
2023-06-08 9:19 ` Conor Dooley
2023-06-09 4:39 ` Tushar Nimkar
2023-06-09 13:14 ` Krzysztof Kozlowski
2023-06-14 6:45 ` Tushar Nimkar
2023-06-15 8:56 ` Sudeep Holla
2023-06-16 5:56 ` Tushar Nimkar
2023-06-16 15:39 ` Sudeep Holla
2023-06-21 6:27 ` Tushar Nimkar
2023-06-08 8:55 ` [PATCH 1/2] dt-bindings: cpu: " Tushar Nimkar
2023-06-09 13:15 ` Krzysztof Kozlowski
2023-06-08 8:55 ` [PATCH 2/2] cpuidle: dt: Add support to keep idle state disabled Tushar Nimkar
2023-06-12 10:26 ` [PATCH 0/2] Add provision " Ulf Hansson
2023-06-14 6:43 ` Tushar Nimkar
2023-06-16 10:55 ` Ulf Hansson
2023-06-21 6:21 ` Tushar Nimkar
2023-06-22 13:01 ` Ulf Hansson
2023-06-26 6:44 ` Tushar Nimkar
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