From patchwork Thu May 25 21:16:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eduardo Valentin X-Patchwork-Id: 13255659 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5CD54C7EE29 for ; Thu, 25 May 2023 21:17:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235946AbjEYVRR (ORCPT ); Thu, 25 May 2023 17:17:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60266 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235747AbjEYVRQ (ORCPT ); Thu, 25 May 2023 17:17:16 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 58112198; Thu, 25 May 2023 14:17:15 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id DEE0464B2D; Thu, 25 May 2023 21:17:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 084DCC433D2; Thu, 25 May 2023 21:17:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1685049434; bh=+BQpgA/b2ao3wMNuPjBRBOPHdCtlI4INTxsSIyFtPTs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dsBOLATfz/A+zYQ4T2Ms2FFPQ1PDBD40nWF5l0+hpk5LXR5PL33HsALvmL/lJi2pO i3r55klIrE96/DKSwIEYyyNBQncZXBsm9Ho/aFd6gYoY9Ui+sNz8Iw2nUXMnvGFRtT Djb488i7WWHH2AnwtNA6Uh1/+IjxE3+hHUHMfkRugQ6Gn2wHG+6CnZIBSPm5Vg48/g zbOqhK+Xq5EM58bxyHQKv/KOnegaXl2+MrMJ+fVI8qbM/mJWmR42IrTeJz7sHDNPSh 3YaJfTG0eqNbEORzg+krT5od6bYcm5BQGe2vEEQSjbZl5qpq/AJl5lAy3KhzZP85ha d5IHzB9XUspHg== From: Eduardo Valentin To: daniel.lezcano@linaro.org, rafael@kernel.org, linux-pm@vger.kernel.org Cc: Eduardo Valentin , Amit Kucheria , Zhang Rui , Jonathan Corbet , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/3] thermal: core: introduce governor .reboot_prepare() Date: Thu, 25 May 2023 14:16:53 -0700 Message-Id: <20230525211655.627415-2-evalenti@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230525211655.627415-1-evalenti@kernel.org> References: <20230525211655.627415-1-evalenti@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Eduardo Valentin This callback is used to notify the governors that reboot is coming up. Upon this event, this callback gives governors the opportunity to leave the thermal zones in a sane state prior to reboot. Cc: "Rafael J. Wysocki" (supporter:THERMAL) Cc: Daniel Lezcano (supporter:THERMAL) Cc: Amit Kucheria (reviewer:THERMAL) Cc: Zhang Rui (reviewer:THERMAL) Cc: Jonathan Corbet (maintainer:DOCUMENTATION) Cc: linux-pm@vger.kernel.org (open list:THERMAL) Cc: linux-doc@vger.kernel.org (open list:DOCUMENTATION) Cc: linux-kernel@vger.kernel.org (open list) Signed-off-by: Eduardo Valentin --- include/linux/thermal.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 82c8e09a63e0..d3c8af928522 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -201,6 +201,9 @@ struct thermal_zone_device { * below the trip point temperature * @check_error: callback called whenever temperature updates fail. * Opportunity for the governor to react on errors. + * @reboot_prepare: callback called upon system restart. + * Opportunity for the governor to tear down zones or at least + * leave them in a safe state. * @governor_list: node in thermal_governor_list (in thermal_core.c) */ struct thermal_governor { @@ -209,6 +212,7 @@ struct thermal_governor { void (*unbind_from_tz)(struct thermal_zone_device *tz); int (*throttle)(struct thermal_zone_device *tz, int trip); void (*check_error)(struct thermal_zone_device *tz, int error); + void (*reboot_prepare)(struct thermal_zone_device *tz); struct list_head governor_list; };