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Wysocki" , Daniel Lezcano , Rob Herring , Mark Rutland Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Chunyan Zhang , Chunyan Zhang Subject: [RFC PATCH v1 2/2] dt-bindings: arm: Add description to the new property for-s2idle-only Date: Mon, 13 Apr 2020 15:00:14 +0800 Message-Id: <20200413070014.12960-3-zhang.lyra@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200413070014.12960-1-zhang.lyra@gmail.com> References: <20200413070014.12960-1-zhang.lyra@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Chunyan Zhang Add a new property for-s2idle-only. The idle-state marked with this property will be set with CPUIDLE_FLAG_S2IDLE during initialization and it would be expected to be found as deepest state for s2idle rather than other cases like play_idle(). Signed-off-by: Chunyan Zhang --- Documentation/devicetree/bindings/arm/idle-states.yaml | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/arm/idle-states.yaml b/Documentation/devicetree/bindings/arm/idle-states.yaml index ea805c1e6b20..cec47b3a447f 100644 --- a/Documentation/devicetree/bindings/arm/idle-states.yaml +++ b/Documentation/devicetree/bindings/arm/idle-states.yaml @@ -263,7 +263,6 @@ patternProperties: description: | Each state node represents an idle state description and must be defined as follows. - The idle state entered by executing the wfi instruction (idle_standby SBSA,[3][4]) is considered standard on all ARM platforms and therefore must not be listed. @@ -283,6 +282,15 @@ patternProperties: lost on state entry, otherwise it is retained. type: boolean + for-s2idle-only: + description: + This indicates that the state only can be found as deepest state + for s2idle rather than other cases like play_idle(). In general, + the state having this property should have longer min-residency + than the cpuidle target min-residency which CPU QoS constraints + defines, to avoid being used by runtime cpuidle. + type: boolean + entry-latency-us: description: Worst case latency in microseconds required to enter the idle state. -- 2.20.1