From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-23.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A955C433EF for ; Tue, 7 Sep 2021 14:55:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 72485610C8 for ; Tue, 7 Sep 2021 14:55:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235028AbhIGO4j (ORCPT ); Tue, 7 Sep 2021 10:56:39 -0400 Received: from new3-smtp.messagingengine.com ([66.111.4.229]:57005 "EHLO new3-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344375AbhIGO4b (ORCPT ); Tue, 7 Sep 2021 10:56:31 -0400 Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailnew.nyi.internal (Postfix) with ESMTP id 2994C580E94; Tue, 7 Sep 2021 10:55:25 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute5.internal (MEProxy); Tue, 07 Sep 2021 10:55:25 -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=s5RoFGayuv7lj w9jyx+KFmGAlL1NLShQA4u/5VnW4IM=; b=kE1ijEYL4y7xBtiN7VabPEDRRxXmw OhkxadPT/wfGFmzhocdnJX4uMcyohN6Hhh1RlmelUdJErjqilkiGGIhYh57wOq4t Nh5FNgBFCEXbqoLywb2ME8Y+64K4RDKCDIl0ilSVfn0KdZQdFxwKN68flWemaZGF hhrDDzbwllD2Jnk9CjtaswMv/ZwYn5zjPrH5NIn2j0jBNSTI+2qTkNDgeI7QjRp2 ouAXl/deOVHYyMqqm7vBGlQw20GqFx385MztVo7lRZZKqUlBWx3yYDHRHcVcaahH IR4FRyPIIUaos8Rt4BAJeOKDPMHMmXhVrm2dUCrqcDfxg6DrKqG60PW4A== 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= fm3; bh=s5RoFGayuv7ljw9jyx+KFmGAlL1NLShQA4u/5VnW4IM=; b=XTCRXoqm BmEqIsYnZSvdt2NNR3+DQzWmU7IS7lOjgwkVlWPw+OwqMpeuc8HGrYMvuLPwsJJM ijYSHmKQKj5x6Cbz2WQHz2Z573pVqDyZruTU5p4GEw9JxDRgohevmPlvib1GcNby SDgERi3R4AidJ/kIt1f2HaX4ahxz3mAlVg51CPsrfN/veQR1OpjC+MmyjEKQirpq 3GHZzhkJZ4JV/1A7diABbSFtz1NQaR8tVcgZS79tAftZIJkSGwy+epr+q6yLEc3U 5ydzGalodAK+MKHZ6x5OGy/Z2ciZdpz+w28Vz4m7BQdhSZo52jWHapGOMvSMcBdv av8vxUvNOw7nRw== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvtddrudefhedgkeefucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephffvufffkffojghfggfgsedtkeertdertddtnecuhfhrohhmpefuvhgvnhcu rfgvthgvrhcuoehsvhgvnhesshhvvghnphgvthgvrhdruggvvheqnecuggftrfgrthhtvg hrnheptefgjedtjeejffelleejleehtdetvedujeelhffgieehgeduueehhfegueeuhfdv necuffhomhgrihhnpeguvghvihgtvghtrhgvvgdrohhrghdpohhfthgtrdhnvghtpdhgih hthhhusgdrtghomhenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhl fhhrohhmpehsvhgvnhesshhvvghnphgvthgvrhdruggvvh X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Tue, 7 Sep 2021 10:55:23 -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 Subject: [PATCH 2/3] dt-bindings: mailbox: Add Apple mailbox bindings Date: Tue, 7 Sep 2021 16:55:00 +0200 Message-Id: <20210907145501.69161-3-sven@svenpeter.dev> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20210907145501.69161-1-sven@svenpeter.dev> References: <20210907145501.69161-1-sven@svenpeter.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Apple mailbox controller are found on the M1 and are used for communication with various co-processors. Signed-off-by: Sven Peter --- .../bindings/mailbox/apple,mailbox.yaml | 81 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 82 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..360d8a162cc5 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml @@ -0,0 +1,81 @@ +# 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. + items: + - const: apple,t8103-asc-mailbox + + - description: + M3 mailboxes are an older variant with a slightly different MMIO + interface still found on the M1. + 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 + + clocks: + description: + Reference to the clock gate phandle(s) if required for this mailbox. + Optional since not all mailboxes are attached to a clock gate. + + "#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 cad1289793db..47de27282c98 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1720,6 +1720,7 @@ 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 -- 2.25.1