From patchwork Mon Jan 28 14:23:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin GAIGNARD X-Patchwork-Id: 10783761 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1E60391E for ; Mon, 28 Jan 2019 14:23:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0C4582ADFD for ; Mon, 28 Jan 2019 14:23:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0002D2AE7B; Mon, 28 Jan 2019 14:23:46 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 456412ADFD for ; Mon, 28 Jan 2019 14:23:46 +0000 (UTC) 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=6UIoJqeiRcaM5nxGeeyhteOBcVbuhxVXWKWsr0u+vwI=; b=g3mGcR2pdn1ybj If1zPiYxzQPHB+9WY0N01mp1WTzmj1ofHYKbTreO2wwbXqfkjWakHhB0z4VdKMXxOHukpkXbsRiTf 6wmv+MMFFwOoXf7jMhxGpc3r47bdAwP2x5sYBiOmVxYpJLQjvlLWeYss6cF7d6GmwT/vBig42NR0b aj737YID6/Pb4CkgzCtAjcsO33riuQrzJB4QIMpWkv8cH0RnrcVzM+ABpEFCn7EEae7zyapJCUTBP eLtNQJz/1RpMPcPlf0cVdhjJ7AAE+HfCqJLGfP9mcpw2BvOmqPJlcnO26jILH7k8MDiN90kJyJIHS Z5X0K5jr0Pt6S5Y8ZU7A==; 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 1go7p9-0004wU-37; Mon, 28 Jan 2019 14:23:43 +0000 Received: from mx08-00178001.pphosted.com ([91.207.212.93] helo=mx07-00178001.pphosted.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1go7p4-0004tu-Cz for linux-arm-kernel@lists.infradead.org; Mon, 28 Jan 2019 14:23:40 +0000 Received: from pps.filterd (m0046661.ppops.net [127.0.0.1]) by mx08-00178001.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x0SELTnn011304; Mon, 28 Jan 2019 15:23:31 +0100 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx08-00178001.pphosted.com with ESMTP id 2q8famd3m7-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Mon, 28 Jan 2019 15:23:31 +0100 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 5BF9841; Mon, 28 Jan 2019 14:23:30 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas21.st.com [10.75.90.44]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 33BAA2D37; Mon, 28 Jan 2019 14:23:30 +0000 (GMT) Received: from SAFEX1HUBCAS24.st.com (10.75.90.95) by SAFEX1HUBCAS21.st.com (10.75.90.44) with Microsoft SMTP Server (TLS) id 14.3.361.1; Mon, 28 Jan 2019 15:23:29 +0100 Received: from localhost (10.201.20.122) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.361.1; Mon, 28 Jan 2019 15:23:28 +0100 From: Benjamin Gaignard To: , , , , , Subject: [RFC v2 1/7] devicetree: bindings: Document domains controller bindings Date: Mon, 28 Jan 2019 15:23:07 +0100 Message-ID: <20190128142313.17036-2-benjamin.gaignard@st.com> X-Mailer: git-send-email 2.15.0 In-Reply-To: <20190128142313.17036-1-benjamin.gaignard@st.com> References: <20190128142313.17036-1-benjamin.gaignard@st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.20.122] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-01-28_08:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190128_062338_723408_730A1960 X-CRM114-Status: GOOD ( 13.19 ) 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: benjamin.gaignard@linaro.org, loic.pallardy@st.com, linux-kernel@vger.kernel.org, linux-imx@nxp.com, kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org, Benjamin Gaignard Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Document commons domains controller bindings for controller and client devices. Signed-off-by: Benjamin Gaignard --- version 2: - complete rework of bindings description to try to give a better definition of what bus domains could be. .../bindings/bus/domains/domainsctrl.txt | 55 ++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/bus/domains/domainsctrl.txt diff --git a/Documentation/devicetree/bindings/bus/domains/domainsctrl.txt b/Documentation/devicetree/bindings/bus/domains/domainsctrl.txt new file mode 100644 index 000000000000..a3fced91842d --- /dev/null +++ b/Documentation/devicetree/bindings/bus/domains/domainsctrl.txt @@ -0,0 +1,55 @@ +Common Domains Controller bindings properties + +Bus domains controllers allow to divided system on chip into multiple domains +that can be used to select by who hardware blocks could be accessed. +A domain could be a cluster of CPUs (or coprocessors), a range of addresses or +a group of hardware blocks. + +This device tree bindings can be used to bind bus domain consumer devices with +their bus domains provided by bus domains controllers. A bus domain provider +can be represented by any node in the device tree and can provide one or more +bus domains. A consumer node can refer to the provider by a phandle and a set +of phandle arguments of length specified by the #domainctrl-cells property in +the bus domain provider node. + +==Bus domain provider== + +Required properties: +- #domainctrl-cells : Number of cells in a bus domain specifier; + Can be any value as specified by device tree binding + documentation of a particular provider. + +==Bus domain consumer== + +Required properties: +- domainsctrl-X : A list of bus domain specifiers, as defined by + bindings of the bus domain controller that is the + bus domain provider. + +Optional properties: +- domainsctrl-names : A list of bus domain name string sorted in the same + order as the domainsctrl-X proprerties. Consumer + drivers will use domainsctrl-names to match bus + domains with bus domains specifiers. + Note that "default" and "unbind" are reserved names + used by the framework. + +Example of usage with: +- a domains controller with a 2 parameters cell +- a domains controller with a 3 parameters cell +- a client device node using the both controllers and 2 configurations + named "default" and "unbind" + +ctrl0: ctrl@0 { + #domainctrl-cells = <2>; +}; + +ctrl1: ctrl@1 { + #domainctrl-cells = <3>; +}; + +foo@0 { + domains-names = "default", "unbind"; + domainctrl-0 = <&ctrl0 1 2>, <&ctrl1 3 4 5>; + domainctrl-1 = <&ctrl0 6 7>, <&ctrl1 8 9 0>; +};