From patchwork Fri Aug 4 14:31:27 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sudeep Holla X-Patchwork-Id: 109403 Delivered-To: patch@linaro.org Received: by 10.140.101.6 with SMTP id t6csp2234149qge; Fri, 4 Aug 2017 07:32:11 -0700 (PDT) X-Received: by 10.84.139.195 with SMTP id 61mr3057327plr.445.1501857131880; Fri, 04 Aug 2017 07:32:11 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1501857131; cv=none; d=google.com; s=arc-20160816; b=LQakKNFdcWsMB5BXci1a1sI0P4pRJ1a08HIDLT5cX/31ZrMCSITvRivLeb0+KpbcQX xPBFAR9kjiB3DJh2FpdPGNakkRPPz0cPYsA0aoHr9Y6sK3sw0Psld5NY0z+A/6sqpvWK wuXmTVzzUu55FlsVF8qjAi0IrZynC5Ba1naUIS4MOmZ85h13v1jbgL25eb++TY3xctrY rhAdYgfTP87guqbfuvyEPqjx/xKTxAd0oEAGaj8d6bfOCd1Mu9h7jsVVQMAtZXQhca0v Nyyne4LEMau2KL0inm+KXiIYQ2Umz37XScHmvvKYjxZG9kcL3GkreBIMFW4PF0goAean 187w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=+0r0btmTHBI3/AGq8GtajBY6SAJbYyx7FmASuZs3ZMI=; b=y7mGJkwjnDqBiyHniErgSFQNQLM/1Xzuli6aP15JDZ4dgAacnh/8yvsqPkDn4L24sc +e1OsXOwE2ScP5evEemRkT6glSnkx0g1tZElisiATmbC8SItoL1RbRcp3u8iwamMyI3l 3vJs4JpIMJBvPw3JKjyOYl7Z5adI5kK4a+gO11j8kbSksDms6lk3Bu2+6SZsNNGOEoGN mxLKkp1i36UZiU8zf1eZLQewFEHIwQdod8r+o2noXT7jrjuuhkNIy/0VrQcFcbbrdDvZ Egj5kASqkI38RgwyHxwfnLEnmNmVcbGDVyzzTqV+KEYonJjTvN4uVlBe3fNYJVGKWLzu hZDQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=devicetree-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id v20si1103092pfj.370.2017.08.04.07.32.11; Fri, 04 Aug 2017 07:32:11 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=devicetree-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752168AbdHDOcJ (ORCPT + 6 others); Fri, 4 Aug 2017 10:32:09 -0400 Received: from foss.arm.com ([217.140.101.70]:54184 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751304AbdHDOcH (ORCPT ); Fri, 4 Aug 2017 10:32:07 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 986DA1596; Fri, 4 Aug 2017 07:32:06 -0700 (PDT) Received: from e107155-lin.cambridge.arm.com (unknown [10.1.210.28]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 31D953F3E1; Fri, 4 Aug 2017 07:32:04 -0700 (PDT) From: Sudeep Holla To: ALKML , LKML , DTML Cc: Sudeep Holla , Roy Franz , Harb Abdulhamid , Nishanth Menon , Arnd Bergmann , Loc Ho , Alexey Klimov , Ryan Harkin , Jassi Brar , Rob Herring , Mark Rutland Subject: [PATCH v2 01/18] dt-bindings: mailbox: add support for mailbox client shared memory Date: Fri, 4 Aug 2017 15:31:27 +0100 Message-Id: <1501857104-11279-2-git-send-email-sudeep.holla@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1501857104-11279-1-git-send-email-sudeep.holla@arm.com> References: <1501857104-11279-1-git-send-email-sudeep.holla@arm.com> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Many users of the mailbox controllers depend on the shared memory between the two end points to exchange the main data while using simple doorbell mechanism to alert the end points of the presence of a message. This patch defines device tree bindings to represent such shared memory in a generic way. Cc: Rob Herring Cc: Mark Rutland Acked-by: Rob Herring Signed-off-by: Sudeep Holla --- .../devicetree/bindings/mailbox/mailbox.txt | 28 ++++++++++++++++++++++ 1 file changed, 28 insertions(+) -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/Documentation/devicetree/bindings/mailbox/mailbox.txt b/Documentation/devicetree/bindings/mailbox/mailbox.txt index be05b9746c69..af8ecee2ac68 100644 --- a/Documentation/devicetree/bindings/mailbox/mailbox.txt +++ b/Documentation/devicetree/bindings/mailbox/mailbox.txt @@ -23,6 +23,11 @@ assign appropriate mailbox channel to client drivers. Optional property: - mbox-names: List of identifier strings for each mailbox channel. +- shmem : List of phandle pointing to the shared memory(SHM) area between the + users of these mailboxes for IPC, one for each mailbox. This shared + memory can be part of any memory reserved for the purpose of this + communication between the mailbox client and the remote. + Example: pwr_cntrl: power { @@ -30,3 +35,26 @@ assign appropriate mailbox channel to client drivers. mbox-names = "pwr-ctrl", "rpc"; mboxes = <&mailbox 0 &mailbox 1>; }; + +Example with shared memory(shmem): + + sram: sram@50000000 { + compatible = "mmio-sram"; + reg = <0x50000000 0x10000>; + + #address-cells = <1>; + #size-cells = <1>; + ranges = <0 0x50000000 0x10000>; + + cl_shmem: shmem@0 { + compatible = "client-shmem"; + reg = <0x0 0x200>; + }; + }; + + client@2e000000 { + ... + mboxes = <&mailbox 0>; + shmem = <&cl_shmem>; + .. + };