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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 2/2] cpuidle: dt: Add support to keep idle state disabled
Date: Thu, 8 Jun 2023 14:25:44 +0530	[thread overview]
Message-ID: <20230608085544.16211-4-quic_tnimkar@quicinc.com> (raw)
In-Reply-To: <20230608085544.16211-1-quic_tnimkar@quicinc.com>

Mark the idle state as disabled using CPUIDLE_FLAG_OFF when
idle-state-disabled property is present.

Such idle states stays disabled and can be enabled using below command.

echo N > /sys/devices/system/cpu/cpuX/cpuidle/stateX/disable

Signed-off-by: Tushar Nimkar <quic_tnimkar@quicinc.com>
---
 drivers/cpuidle/dt_idle_states.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/cpuidle/dt_idle_states.c b/drivers/cpuidle/dt_idle_states.c
index 12fec92a85fd..3d50181512a3 100644
--- a/drivers/cpuidle/dt_idle_states.c
+++ b/drivers/cpuidle/dt_idle_states.c
@@ -79,6 +79,9 @@ static int init_state_node(struct cpuidle_state *idle_state,
 	idle_state->flags = CPUIDLE_FLAG_RCU_IDLE;
 	if (of_property_read_bool(state_node, "local-timer-stop"))
 		idle_state->flags |= CPUIDLE_FLAG_TIMER_STOP;
+
+	if (of_property_read_bool(state_node, "idle-state-disabled"))
+		idle_state->flags |= CPUIDLE_FLAG_OFF;
 	/*
 	 * TODO:
 	 *	replace with kstrdup and pointer assignment when name
-- 
2.17.1


  parent 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 [PATCH 0/2] Add provision to keep idle state disabled Tushar Nimkar
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 ` Tushar Nimkar [this message]
2023-06-12 10:26 ` [PATCH 0/2] Add provision to keep idle state disabled 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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