From patchwork Sun Oct 17 11:40:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sven Peter X-Patchwork-Id: 1542209 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=svenpeter.dev header.i=@svenpeter.dev header.a=rsa-sha256 header.s=fm2 header.b=gTWXGXTa; dkim=pass (2048-bit key; unprotected) header.d=messagingengine.com header.i=@messagingengine.com header.a=rsa-sha256 header.s=fm1 header.b=nx/6UFzG; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4HXJ4G6Grzz9s0r for ; Sun, 17 Oct 2021 22:41:18 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245564AbhJQLnS (ORCPT ); Sun, 17 Oct 2021 07:43:18 -0400 Received: from new2-smtp.messagingengine.com ([66.111.4.224]:51533 "EHLO new2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245558AbhJQLnP (ORCPT ); Sun, 17 Oct 2021 07:43:15 -0400 Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailnew.nyi.internal (Postfix) with ESMTP id 25CDA5809FE; Sun, 17 Oct 2021 07:41:06 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute1.internal (MEProxy); Sun, 17 Oct 2021 07:41:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=svenpeter.dev; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=fm2; bh=z9rtM6rBfWq4o TkLpB2GBB5Bp0ue9u8/PQZ5AjQ4pqs=; b=gTWXGXTaLoYAopNgHvtnu59Tfp2X3 tDFs1DHNDEmwHbMvMJUrrC39leGDhSKPTVuWkof6xYqkQVi+El1kmJv7xNW5P5cF fZNl7akfP+oV1rJY+CUxP5R8NV4jwTZ0oVPS0FzrPpOhCBPUSW794Fm6lmBo9ByO Xs/+Q2x13W+UQ/0QJqJzvpqDxx2+Mlgs7Q5pDZPDhV7TCb99RkpbQcXl5M/ffDWs 0nI5Tw9W7UbokvBt9e/jobQNVrJaOhja7L70x+t1YqJ7yuzLVAVMiyI8psQmmCnA IksE4insZbORdfFIofJd6QZZvsJBVGD2JoVayfJOGU/1woean6SUTfITw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:subject:to :x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm1; bh=z9rtM6rBfWq4oTkLpB2GBB5Bp0ue9u8/PQZ5AjQ4pqs=; b=nx/6UFzG fmr+mp+9HxjrZSPmO8C3CX+R/nso/4xV1qaSyNET3VLTqBB/D1PYZ9z1zAzpy2nx AjA5qjjEtCeW0w959Ns86LYn2U5kf7qHSjjzDUr6rKDPVZ9Awdg9trKADZQFuTQT BgYZnbE1XjiXwY6FPguIXPVVz1Y7aZFmnT4GZ0jq44tx7WrKaTvcEgO30NccHCBo WcGofZjumaJ9Jjv6i0Dj/hpMYsiwwJBpTJ7TQZp8hUx9sS/PtDjXpisKh34boRuU dUo2HPgmk4MKs3TmNiflaQ1lQAv9Shofl6CvCzwoI7s9bEzhfD3OcmzrdjZMMVbo g5mSCp9bVwVrbA== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvtddrvddukedggedvucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephffvufffkffojghfggfgsedtkeertdertddtnecuhfhrohhmpefuvhgvnhcu rfgvthgvrhcuoehsvhgvnhesshhvvghnphgvthgvrhdruggvvheqnecuggftrfgrthhtvg hrnheptefgjedtjeejffelleejleehtdetvedujeelhffgieehgeduueehhfegueeuhfdv necuffhomhgrihhnpeguvghvihgtvghtrhgvvgdrohhrghdpohhfthgtrdhnvghtpdhgih hthhhusgdrtghomhenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhl fhhrohhmpehsvhgvnhesshhvvghnphgvthgvrhdruggvvh X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Sun, 17 Oct 2021 07:41:04 -0400 (EDT) From: Sven Peter To: Jassi Brar Cc: Sven Peter , Rob Herring , Mark Kettenis , Hector Martin , Alyssa Rosenzweig , Mohamed Mediouni , Stan Skowronek , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mark Kettenis , Rob Herring Subject: [PATCH v3 1/2] dt-bindings: mailbox: Add Apple mailbox bindings Date: Sun, 17 Oct 2021 13:40:53 +0200 Message-Id: <20211017114054.67737-2-sven@svenpeter.dev> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20211017114054.67737-1-sven@svenpeter.dev> References: <20211017114054.67737-1-sven@svenpeter.dev> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Apple mailbox controller are found on the M1 and are used for communication with various co-processors. Reviewed-by: Alyssa Rosenzweig Reviewed-by: Mark Kettenis Reviewed-by: Rob Herring Signed-off-by: Sven Peter --- .../bindings/mailbox/apple,mailbox.yaml | 79 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 80 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml diff --git a/Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml b/Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml new file mode 100644 index 000000000000..d488a4173072 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml @@ -0,0 +1,79 @@ +# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mailbox/apple,mailbox.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Apple Mailbox Controller + +maintainers: + - Hector Martin + - Sven Peter + +description: + The Apple mailbox consists of two FIFOs used to exchange 64+32 bit + messages between the main CPU and a co-processor. Multiple instances + of this mailbox can be found on Apple SoCs. + One of the two FIFOs is used to send data to a co-processor while the other + FIFO is used for the other direction. + Various clients implement different IPC protocols based on these simple + messages and shared memory buffers. + +properties: + compatible: + oneOf: + - description: + ASC mailboxes are the most common variant found on the M1 used + for example for the display controller, the system management + controller and the NVMe coprocessor. + items: + - const: apple,t8103-asc-mailbox + + - description: + M3 mailboxes are an older variant with a slightly different MMIO + interface still found on the M1. It is used for the Thunderbolt + co-processors. + items: + - const: apple,t8103-m3-mailbox + + reg: + maxItems: 1 + + interrupts: + minItems: 4 + items: + - description: send fifo is empty interrupt + - description: send fifo is not empty interrupt + - description: receive fifo is empty interrupt + - description: receive fifo is not empty interrupt + + interrupt-names: + minItems: 4 + items: + - const: send-empty + - const: send-not-empty + - const: recv-empty + - const: recv-not-empty + + "#mbox-cells": + const: 0 + +required: + - compatible + - reg + - interrupts + - interrupt-names + - "#mbox-cells" + +additionalProperties: false + +examples: + - | + mailbox@77408000 { + compatible = "apple,t8103-asc-mailbox"; + reg = <0x77408000 0x4000>; + interrupts = <1 583 4>, <1 584 4>, <1 585 4>, <1 586 4>; + interrupt-names = "send-empty", "send-not-empty", + "recv-empty", "recv-not-empty"; + #mbox-cells = <0>; + }; diff --git a/MAINTAINERS b/MAINTAINERS index a4a0c2baaf27..be83d20a33ef 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1723,6 +1723,7 @@ C: irc://irc.oftc.net/asahi-dev T: git https://github.com/AsahiLinux/linux.git F: Documentation/devicetree/bindings/arm/apple.yaml F: Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml +F: Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml F: Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml F: arch/arm64/boot/dts/apple/ F: drivers/irqchip/irq-apple-aic.c