From patchwork Mon Oct 25 06:22:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sven Peter X-Patchwork-Id: 1545553 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=UVuUAEBJ; dkim=pass (2048-bit key; unprotected) header.d=messagingengine.com header.i=@messagingengine.com header.a=rsa-sha256 header.s=fm1 header.b=YtRap/SQ; 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 4Hd4cY1xvrz9sRR for ; Mon, 25 Oct 2021 17:22:21 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230519AbhJYGYl (ORCPT ); Mon, 25 Oct 2021 02:24:41 -0400 Received: from new2-smtp.messagingengine.com ([66.111.4.224]:45253 "EHLO new2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230395AbhJYGYj (ORCPT ); Mon, 25 Oct 2021 02:24:39 -0400 Received: from compute6.internal (compute6.nyi.internal [10.202.2.46]) by mailnew.nyi.internal (Postfix) with ESMTP id 8194E5806B0; Mon, 25 Oct 2021 02:22:17 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute6.internal (MEProxy); Mon, 25 Oct 2021 02:22:17 -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=5hM2/XE4eiulT ofdooK30iMnhhF3G/1JqJNrpfwoEqw=; b=UVuUAEBJ76s0ZcUT/ROOu1tlZ3vzq Xx1YDpYYPzZeD5RGkK/wFDcjjFNeTIKKfN9vBIRaCYHLiD7+zA5UQr/0vSk/hjAI LO4HuV9Tt2Tj//UoQXLkb+KVGKp6tUdclcbHf0jUcRijaKcUF+vxVHczDUB+6vJI Z/lTv1eqiCwpqWTM3NH/DEDvBFMemAbOFk2UgBsramehtGpmQSF2DyRe8NOQDvCG jnk+6kQe0rRqD48JRZ34ZvCKPUXsL4zlobFx/ejg/v+S9DqOIrPy6bmOKQBJD75v A5p0qrLOYII/plv4KueHEtxPOOOkhYQlfbY//CagGsHezNZ7FTM5faB5A== 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=5hM2/XE4eiulTofdooK30iMnhhF3G/1JqJNrpfwoEqw=; b=YtRap/SQ av5gPRWe3hBnO0AR3EZ2kqZP60CEKcwrsFFVHvRevvk1Brh+rbamLyNfIi21l/vZ CuwWAI7l7O6WxNqyXiUOFubkoNPVs+vpeImJ27TM5U4ksV1KWeEhREZuHiCa8QsP 1DLjXlYtJ1j1QmElyh4pKgH9UC2xPiX7BGPfZZNqVXvJo/fujPVrKHUdbKqRkuhl 9IsSiu8em5Gw0s8cus4/6nlrO9uV2Bq6jsxByh5Po8E3bxndKtK9c2M8mlA/435q 7h8VO8xCZ0b60rlpVUF8I0BVnwaTM97FIVAtVPsnNDrEuJMgGJ0SKOQO9RNY084h 6ia/uUhD0n5D4w== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvtddrvdefgedguddtgecutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmd enucfjughrpefhvffufffkofgjfhgggfestdekredtredttdenucfhrhhomhepufhvvghn ucfrvghtvghruceoshhvvghnsehsvhgvnhhpvghtvghrrdguvghvqeenucggtffrrghtth gvrhhnpefhfeffjedvkeeliedtffeihffhffevffeijeetfeehuddtgffffedtjeehtdet heenucffohhmrghinhepuggvvhhitggvthhrvggvrdhorhhgnecuvehluhhsthgvrhfuih iivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepshhvvghnsehsvhgvnhhpvghtvghr rdguvghv X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Mon, 25 Oct 2021 02:22:14 -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 v4 2/3] dt-bindings: mailbox: Add Apple mailbox bindings Date: Mon, 25 Oct 2021 08:22:03 +0200 Message-Id: <20211025062204.1517-3-sven@svenpeter.dev> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20211025062204.1517-1-sven@svenpeter.dev> References: <20211025062204.1517-1-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: Mark Kettenis Reviewed-by: Rob Herring Signed-off-by: Sven Peter --- .../bindings/mailbox/apple,mailbox.yaml | 77 +++++++++++++++++++ 1 file changed, 77 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..2c1704b34e7a --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml @@ -0,0 +1,77 @@ +# 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: + 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: + 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>; + };