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=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 E1B4CC04AB6 for ; Tue, 14 May 2019 08:27:37 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B352B20675 for ; Tue, 14 May 2019 08:27:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="MfSyn7lL"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=st.com header.i=@st.com header.b="1eEmFBvm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B352B20675 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=st.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=P87y1UwHa4AYACM1DOh7ruER+MrfviV9DHYVev0bAAM=; b=MfSyn7lLlpUSXh im2sjAj7bkZdFx4sBBYRI4DH8Q6mDnTLFAORPG8kGrjhCyM0DVDFgaFyR6S0BSRF9CWL+ZurDt3Ci 12HQnkfjMSPjVwLJuknJqAoBK37Fvdh0pZGyrfAdqeZipG2p/uyl8Z6mrIG4oyHJCJugy7TD/gnik 260PnCLErzKuopKgVSTre6E9+j9373y79UGMZL/dmUNT6AxMcm32lse9WVSgX+6U3BNSNVgyi4XI7 fO6KBeU52yhqxdL3ch3IOnBcV61JgGbcec4Gz9M4wwMUszluWaRt1IcXqEo2FP4rRlBoToBh0n6ub pWamt7o4FC7xcRFzuuiw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hQSmZ-0005Fd-Iq; Tue, 14 May 2019 08:27:31 +0000 Received: from mx07-00178001.pphosted.com ([62.209.51.94]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hQSmJ-0004qE-LO for linux-arm-kernel@lists.infradead.org; Tue, 14 May 2019 08:27:28 +0000 Received: from pps.filterd (m0046668.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x4E8Q8xq029562; Tue, 14 May 2019 10:27:09 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=STMicroelectronics; bh=ug1rZBb4tp1QfVGX2K2LUauv8v7kBPMYnK+aqeqOCBA=; b=1eEmFBvmFp2Kt7iCklqkRaGZECElRyWYDZQKUavC/hkOrkWqInyOfUJ4V3EfoGkQunUO mzyEcMfs6zP80CO1aLv0H90K/en9L/uuuEbjsmMCDX1IGEKBwWmPz4a/tD6kCSlw/BlO /JChmB/bESSdhZXKh1u18gMzat0TS6ArSsMrP33vT/8t+oBWMM4uztUwrDRXqObDxZ+/ Y5HuDFYCxKUi8080cfGbKPJ5T7JK555Yx5341xPf0+LX09oxsts7jga1BnZPYcq87IW2 PAkYqbM16UoKoHYLlUbGt9cWXCUCHTLNg+k759GiW7pDH57hU2ZqD40/X/L2FWw4eru+ gg== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 2sdkuyqnmr-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Tue, 14 May 2019 10:27:09 +0200 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id CC3643F; Tue, 14 May 2019 08:27:08 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas24.st.com [10.75.90.94]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 9666A1550; Tue, 14 May 2019 08:27:08 +0000 (GMT) Received: from SAFEX1HUBCAS23.st.com (10.75.90.47) by Safex1hubcas24.st.com (10.75.90.94) with Microsoft SMTP Server (TLS) id 14.3.439.0; Tue, 14 May 2019 10:27:08 +0200 Received: from localhost (10.201.23.25) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.439.0; Tue, 14 May 2019 10:27:07 +0200 From: Fabien Dessenne To: Rob Herring , Mark Rutland , Maxime Coquelin , Alexandre Torgue , Ohad Ben-Cohen , Bjorn Andersson , , , , , Subject: [PATCH v4 1/8] dt-bindings: stm32: add bindings for ML-AHB interconnect Date: Tue, 14 May 2019 10:26:56 +0200 Message-ID: <1557822423-22658-2-git-send-email-fabien.dessenne@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1557822423-22658-1-git-send-email-fabien.dessenne@st.com> References: <1557822423-22658-1-git-send-email-fabien.dessenne@st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.23.25] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-05-14_05:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190514_012717_073308_CECDD067 X-CRM114-Status: GOOD ( 14.73 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ludovic Barre , Arnaud Pouliquen , Loic Pallardy , Fabien Dessenne , Benjamin Gaignard Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Document the ML-AHB interconnect for stm32 SoCs. Signed-off-by: Fabien Dessenne --- .../devicetree/bindings/arm/stm32/mlahb.txt | 37 ++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/stm32/mlahb.txt diff --git a/Documentation/devicetree/bindings/arm/stm32/mlahb.txt b/Documentation/devicetree/bindings/arm/stm32/mlahb.txt new file mode 100644 index 0000000..25307aa --- /dev/null +++ b/Documentation/devicetree/bindings/arm/stm32/mlahb.txt @@ -0,0 +1,37 @@ +ML-AHB interconnect bindings + +These bindings describe the STM32 SoCs ML-AHB interconnect bus which connects +a Cortex-M subsystem with dedicated memories. +The MCU SRAM and RETRAM memory parts can be accessed through different addresses +(see "RAM aliases" in [1]) using different buses (see [2]) : balancing the +Cortex-M firmware accesses among those ports allows to tune the system +performance. + +[1]: https://www.st.com/resource/en/reference_manual/dm00327659.pdf +[2]: https://wiki.st.com/stm32mpu/wiki/STM32MP15_RAM_mapping + +Required properties: +- compatible: should be "simple-bus" +- dma-ranges: describes memory addresses translation between the local CPU and + the remote Cortex-M processor. Each memory region, is declared with + 3 parameters: + - param 1: device base address (Cortex-M processor address) + - param 2: physical base address (local CPU address) + - param 3: size of the memory region. + +The Cortex-M remote processor accessed via the mlahb interconnect is described +by a child node. + +Example: +mlahb { + compatible = "simple-bus"; + #address-cells = <1>; + #size-cells = <1>; + dma-ranges = <0x00000000 0x38000000 0x10000>, + <0x10000000 0x10000000 0x60000>, + <0x30000000 0x30000000 0x60000>; + + m4_rproc: m4@10000000 { + ... + }; +}; -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel