From patchwork Wed Feb 21 23:30:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravana Kannan X-Patchwork-Id: 13566609 Received: from mail-yb1-f202.google.com (mail-yb1-f202.google.com [209.85.219.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 78008126F37 for ; Wed, 21 Feb 2024 23:30:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708558234; cv=none; b=NRbDUQo5yZ3VjNUudpbRuFvyWxNCQrXB1M3UN/uy/LxP2PDeEiQ7reZ9gMSrn9XNcfvoysA2fuUY5skgQBsLi9gU8IS6H8c7Cwy7TkmZhyQ2xeC3ogernL1qGdHdwKENdUIk2Y9i3nWbkMMfJAuyAftEMb3QgGpvVLHvO9inP+8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708558234; c=relaxed/simple; bh=rMfghQHSrf66m2xYpU7sUmwUlSg6uFRoFfJUQDk9JaI=; h=Date:Message-Id:Mime-Version:Subject:From:To:Cc:Content-Type; b=YluQUkY6mUCKqlKUs36nA6DNy5G1ln3wazKT2C64XSGDlRPwA5FA9S4v2fhaG2KOe5f5g7kwq8wXyOzKqrwVByFOWek6oDDKvbP9tqovyZQ3k+VXn+DG/F9c85Jjt6yzzVSCGZYloZjUt0ssLKpZc6NCIIbzx/s91mOwHrk3c5g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--saravanak.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=pGG5W/pC; arc=none smtp.client-ip=209.85.219.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--saravanak.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="pGG5W/pC" Received: by mail-yb1-f202.google.com with SMTP id 3f1490d57ef6-dc6b2682870so12163958276.0 for ; Wed, 21 Feb 2024 15:30:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1708558231; x=1709163031; darn=vger.kernel.org; h=cc:to:from:subject:mime-version:message-id:date:from:to:cc:subject :date:message-id:reply-to; bh=RsJ1fv6sfnN74ztB0VWfE18M80nrvJ6wlqEGStg9ZSY=; b=pGG5W/pCpowgB90F6DOeurXkM0sDYn2DGbPwU6oOalRQK0gqUbERNIDe39Oow7i9re 3mkubDSPCtNrY3OhAfrvGEQ0ZVhTyoWAIUkDPVf3oDbuezJtVl/8fntnz30jA/aqyspz KgY59ihna18AXxR+UdUCaYRBTqGDJDL6oTHifkDfNZpCYOxdpVALsfnPYqt7NfQl93b2 O6ZHzLkzTnOMkNPiyxm+vJS2dGIvo1mZoBJorw5FEoje2jSQVIOAz5E5bPfZgQJ6RdvQ TqoijWnpUN7/nEqoYUftm9oM3yIKwTvD/VdxiTuCi1T+CqIH7Y/iJYLcIS0bIYqPpwWC tAig== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708558231; x=1709163031; h=cc:to:from:subject:mime-version:message-id:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=RsJ1fv6sfnN74ztB0VWfE18M80nrvJ6wlqEGStg9ZSY=; b=AySX/z/Q2uuStGcMPIksyfHXhNSgo6FG2hRgAstSPrn6P9ohthv4zyCsVirCWWCGyv uohSkA4EIh5RRcTSW8G2Or0GOWG0nRXV0MWnoFN+cTYcsLnnAh5reU+zN1tmZthewvwH ixv8Zd7OOQIb0fmhaxrTFdm50aPR9xqo6dXMTCZVkzVroZLANRtxBPTrY0ZmJuuOAQLE extzvveF+pwCz4osl9FVEaqlGA0twy7kXI0fmjhkRdUioQEos9THl50kA5p6DkCq3W1l NWOW6tEzpOkAGaVfYyyAQ9z8ShnIxFTgOIthBrIyyzUbQd6X7cA/r2gmnQY+lty/TdyQ kIWg== X-Forwarded-Encrypted: i=1; AJvYcCXgrIejeZsE8zJylgElpZtuxRViAHkHRclNsGBznvHHpRJhK48gwHNJXRAivR3vhB2n12ExNO6mxWqjSywF1jf7K3wEyAL5jPlocw== X-Gm-Message-State: AOJu0Ywvitmqk12sAQn4edRUwR5OF7Rq0EHkqv0vTAzEBZGbwEe/PHai h/CLulGr4LGe/ef+CxbCFRHoZYbPX6N2OOeMfmNxwXThtxPVRXDXukuNda0pTpUhXrhpdtUZEho nqfAg+P2u0NivVQ== X-Google-Smtp-Source: AGHT+IFFe6RGLehaGSPj902y32MxR8KvPs3Ay0pm4gQyZIEo/E/TTc10pIGjALHXPwbgNwcAARJB+YShim+SxHY= X-Received: from saravanak.san.corp.google.com ([2620:15c:2d:3:4e1e:336a:2b30:13fe]) (user=saravanak job=sendgmr) by 2002:a05:6902:1024:b0:dc7:48ce:d17f with SMTP id x4-20020a056902102400b00dc748ced17fmr199215ybt.10.1708558231444; Wed, 21 Feb 2024 15:30:31 -0800 (PST) Date: Wed, 21 Feb 2024 15:30:20 -0800 Message-Id: <20240221233026.2915061-1-saravanak@google.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.44.0.rc0.258.g7320e95886-goog Subject: [PATCH v3 0/4] Add post-init-providers binding to improve suspend/resume stability From: Saravana Kannan To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Greg Kroah-Hartman , "Rafael J. Wysocki" , Ard Biesheuvel , Frank Rowand , Andy Shevchenko , Daniel Scally , Heikki Krogerus , Sakari Ailus , Len Brown , Saravana Kannan Cc: kernel-team@android.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org, linux-acpi@vger.kernel.org This patch series adds a "post-init-providers" device tree binding that can be used to break dependency cycles in device tree and enforce a more determinstic probe/suspend/resume order. This will also improve the stability of global async probing and async suspend/resume and allow us to enable them more easily. Yet another step away from playing initcall chicken with probing and step towards fully async probing and suspend/resume. Patch 3 (the binding documentation) provides a lot more details and examples. v2->v3: - Changes doc/code from "post-init-supplier" to "post-init-providers" - Fixed some wording that was ambiguous for Conor. - Fixed indentation, additionalProperties and white space issues in the yaml syntax. - Fixed syntax errors in the example. v1->v2: - Addressed Documentation/commit text errors pointed out by Rob - Reordered MAINTAINERS chunk as pointed out by Krzysztof Saravana Kannan (4): driver core: Adds flags param to fwnode_link_add() driver core: Add FWLINK_FLAG_IGNORE to completely ignore a fwnode link dt-bindings: Add post-init-providers property of: property: fw_devlink: Add support for "post-init-providers" property .../bindings/post-init-providers.yaml | 105 ++++++++++++++++++ MAINTAINERS | 13 ++- drivers/base/core.c | 14 ++- drivers/firmware/efi/sysfb_efi.c | 2 +- drivers/of/property.c | 17 ++- include/linux/fwnode.h | 5 +- 6 files changed, 142 insertions(+), 14 deletions(-) create mode 100644 Documentation/devicetree/bindings/post-init-providers.yaml