From patchwork Tue Apr 22 08:57:10 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oleksij Rempel X-Patchwork-Id: 883442 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D394B25B664 for ; Tue, 22 Apr 2025 08:57:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745312260; cv=none; b=j91WQ2dEIUQd0wgFOjE9wDmFGlKBjr19ct1eZnZYQUllE8b4RPVcSZw4hHUlQTCjRhgzr76i4Y/ERhmCHlXkShO5tV5V/SAnnjmF/jlTatcn96TFzNFeMjtCP67A3XayexAbsOKKAcydkpb0yR4iiRksiMSQ7QMo42TC24wkfso= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745312260; c=relaxed/simple; bh=Rbyz2ftNDpvSEMKvn/ADDVhtF8Nex1a0YDAZd9TdBM8=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version:Content-Type; b=Fjpcd2+O5yQB4668uaG1gmH+DpHzcNFYKFwZjhzLsMbBPYOmwqSradlgjs7xOlS1oXMFu+LDzWOIYOIgKjrpbELtKDqMfXASgQD7QUpeXzSd6LmkL5nNTABczuhgU7AWz3U/ZwiztVayrkB5EUGqMQNWSy4nSHYL8RVKUfsrwDM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de; spf=pass smtp.mailfrom=pengutronix.de; arc=none smtp.client-ip=185.203.201.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1u79RQ-0007Tx-3n; Tue, 22 Apr 2025 10:57:20 +0200 Received: from dude04.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::ac]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1u79RO-001WRB-2g; Tue, 22 Apr 2025 10:57:18 +0200 Received: from ore by dude04.red.stw.pengutronix.de with local (Exim 4.96) (envelope-from ) id 1u79RO-00Avp3-2P; Tue, 22 Apr 2025 10:57:18 +0200 From: Oleksij Rempel To: Sebastian Reichel , Srinivas Kandagatla , Benson Leung , Tzung-Bi Shih , Daniel Lezcano Cc: Oleksij Rempel , kernel@pengutronix.de, linux-kernel@vger.kernel.org, Liam Girdwood , Mark Brown , "Rafael J. Wysocki" , Zhang Rui , Lukasz Luba , linux-pm@vger.kernel.org, =?utf-8?q?S=C3=B8ren_Andersen?= , Guenter Roeck , Matti Vaittinen , Ahmad Fatoum , Andrew Morton , chrome-platform@lists.linux.dev Subject: [PATCH v9 0/7] Introduction of PSCR Framework and Related Components Date: Tue, 22 Apr 2025 10:57:10 +0200 Message-Id: <20250422085717.2605520-1-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.39.5 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: ore@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-pm@vger.kernel.org changes v9: - Remove redundant pr_crit() messages before hw_protection_trigger() - Replace psc_reason_to_str() switch with static const string array - Mark psc_last_reason as static changes v8: - Use DEFINE_GUARD() and guard(g_pscrr) for scoped locking of the global pscrr_core struct - Replace manual mutex_lock/unlock with automatic cleanup-based guard() usage - Centralize backend and locking state in struct pscrr_core - Prepare for future multi-backend support with clean encapsulation - Improve sysfs documentation: * Added full enum psc_reason value table * Simplified example comments, removed redundant "may differ" phrasing * Added note that not all values are supported on all systems * Linked value definitions to include/linux/reboot.h * Added clear read/write usage examples for sysfs entries changes v7: - document expected values in sysfs documentation - make write support optional changes v6: - add sysfs documentation - rebase against latest hw_protection_reboot changes: https://web.git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/commit/?h=mm-nonmm-unstable&id=212dd3f6e57f6af8ed3caa23b93adc29334f9652 - push core part of the reset reason the kernel/reboot.c changes v5: - fix compile with NVMEM=n and potential issues with NVMEM=m changes v4: - fix compile with CONFIG_PSCRR=n changes v3 - rework to remove devicetree dependencies - extend NVMEM to search devices and cells by names. changes v2: - rename the framework from PSCR to PSCRR (last R is for Recorder) - extend power on reason header and use it to show detected reason on system start and in sysfs. - remove "unknow" reason - rebase on top of v6.8-rc1 - yaml fixes - zero reason state on boot Hello all, This patch series introduces the Power State Change Reasons Recording (PSCRR) framework and its related components into the kernel. The PSCR framework is designed for systems where traditional methods of storing power state change reasons, like PMICs or watchdogs, are inadequate. It provides a structured way to store reasons for system shutdowns and reboots, such as under-voltage or software-triggered events, in non-volatile hardware storage. These changes are critical for systems requiring detailed postmortem analysis and where immediate power-down scenarios limit traditional storage options. The framework also assists bootloaders and early-stage system components in making informed recovery decisions. Oleksij Rempel (7): power: Extend power_on_reason.h for upcoming PSCRR framework reboot: hw_protection_trigger: use standardized numeric shutdown/reboot reasons instead of strings power: reset: Introduce PSCR Recording Framework for Non-Volatile Storage nvmem: provide consumer access to cell size metrics nvmem: add support for device and sysfs-based cell lookups power: reset: add PSCR NVMEM Driver for Recording Power State Change Reasons Documentation: Add sysfs documentation for PSCRR reboot reason tracking .../ABI/testing/sysfs-kernel-reboot-pscrr | 74 ++++ drivers/nvmem/core.c | 134 ++++++ drivers/platform/chrome/cros_ec_lpc.c | 2 +- drivers/power/reset/Kconfig | 47 ++ drivers/power/reset/Makefile | 2 + drivers/power/reset/pscrr-nvmem.c | 254 +++++++++++ drivers/power/reset/pscrr.c | 403 ++++++++++++++++++ drivers/regulator/core.c | 13 +- drivers/regulator/irq_helpers.c | 9 +- drivers/thermal/thermal_core.c | 3 +- include/linux/nvmem-consumer.h | 25 ++ include/linux/power/power_on_reason.h | 4 + include/linux/pscrr.h | 58 +++ include/linux/reboot.h | 77 +++- kernel/reboot.c | 85 +++- 15 files changed, 1168 insertions(+), 22 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-kernel-reboot-pscrr create mode 100644 drivers/power/reset/pscrr-nvmem.c create mode 100644 drivers/power/reset/pscrr.c create mode 100644 include/linux/pscrr.h --- 2.39.5