linux-kernel - [PATCH v2 07/21] cpuidle: psci: Opt-out from genpd's common ->sync

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Message-ID: <20250523134025.75130-8-ulf.hansson@linaro.org>
Date: Fri, 23 May 2025 15:40:04 +0200
From: Ulf Hansson <ulf.hansson@...aro.org>
To: Saravana Kannan <saravanak@...gle.com>,
	Stephen Boyd <sboyd@...nel.org>,
	linux-pm@...r.kernel.org
Cc: "Rafael J . Wysocki" <rafael@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Michael Grzeschik <m.grzeschik@...gutronix.de>,
	Bjorn Andersson <andersson@...nel.org>,
	Abel Vesa <abel.vesa@...aro.org>,
	Peng Fan <peng.fan@....nxp.com>,
	Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
	Johan Hovold <johan@...nel.org>,
	Maulik Shah <maulik.shah@....qualcomm.com>,
	Michal Simek <michal.simek@....com>,
	Konrad Dybcio <konradybcio@...nel.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Jonathan Hunter <jonathanh@...dia.com>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 07/21] cpuidle: psci: Opt-out from genpd's common ->sync_state() support

The cpuidle-psci-domain implements its own specific ->sync_state()
callback. Let's set the GENPD_FLAG_NO_SYNC_STATE to inform genpd about it.

Moreover, let's call of_genpd_sync_state() to make sure genpd tries to
power off unused PM domains.

Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
---
 drivers/cpuidle/cpuidle-psci-domain.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/cpuidle/cpuidle-psci-domain.c b/drivers/cpuidle/cpuidle-psci-domain.c
index 2041f59116ce..b880ce2df8b5 100644
--- a/drivers/cpuidle/cpuidle-psci-domain.c
+++ b/drivers/cpuidle/cpuidle-psci-domain.c
@@ -63,7 +63,8 @@ static int psci_pd_init(struct device_node *np, bool use_osi)
 	if (!pd_provider)
 		goto free_pd;
 
-	pd->flags |= GENPD_FLAG_IRQ_SAFE | GENPD_FLAG_CPU_DOMAIN;
+	pd->flags |= GENPD_FLAG_IRQ_SAFE | GENPD_FLAG_CPU_DOMAIN |
+		     GENPD_FLAG_NO_SYNC_STATE;
 
 	/*
 	 * Allow power off when OSI has been successfully enabled.
@@ -128,11 +129,16 @@ static void psci_pd_remove(void)
 
 static void psci_cpuidle_domain_sync_state(struct device *dev)
 {
+	struct psci_pd_provider *pd_provider;
+
 	/*
 	 * All devices have now been attached/probed to the PM domain topology,
 	 * hence it's fine to allow domain states to be picked.
 	 */
 	psci_pd_allow_domain_state = true;
+
+	list_for_each_entry(pd_provider, &psci_pd_providers, link)
+		of_genpd_sync_state(pd_provider->node);
 }
 
 static const struct of_device_id psci_of_match[] = {
-- 
2.43.0