From patchwork Fri Mar 16 17:53:49 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Icenowy Zheng X-Patchwork-Id: 10290397 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 3854D602C2 for ; Fri, 16 Mar 2018 22:36:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 20992290BA for ; Fri, 16 Mar 2018 22:36:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0FE54290D4; Fri, 16 Mar 2018 22:36:38 +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=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID 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 8386E290BA for ; Fri, 16 Mar 2018 22:36:37 +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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=2TJWuD88GrSCvOrbdyc751oO+YSt9pRejsHz4Qa4VeA=; b=pW8NRIQnXzkRXQjctof9yTrIQI unbEzNJBR4zOgYlN/eKAmY2/o8EcfSeCX5kzccOI7CX/boKhM1zc5KDN1V+NxWsKTWHuo70PwFaDW 0CMhkEXdfKGCfdHIXbPMzLlWXZOJ2cVR8NjP/fgP/tJGmRL3q5ainuNfxtQe1wqYJAxOh4WXagUcl 3GYbukfjhzDUI9f2kS1KJqdfcQrsuxhS1lXr0EY9HF/2rQlolCXp7qkUZnUARGDZvB95LpRQ1jXEg CuWPZS264jL8SAFRosS+lLnHF8dKLMzM3woBQWygP7THYKLMcF1nQDltM68TI4ZEoEdgYYrOpx6fL o+LZ+1wg==; 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 1ewxxc-0003ee-02; Fri, 16 Mar 2018 22:36:28 +0000 Received: from cockroach.ash.relay.mailchannels.net ([23.83.222.37]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1ewtaG-0008Qk-AY for linux-arm-kernel@lists.infradead.org; Fri, 16 Mar 2018 17:56:08 +0000 X-Sender-Id: lmn-tzduiowcrqmw|x-authsender|icenowy@aosc.io Received: from relay.mailchannels.net (localhost [127.0.0.1]) by relay.mailchannels.net (Postfix) with ESMTP id A4843681054; Fri, 16 Mar 2018 17:55:48 +0000 (UTC) Received: from hermes.aosc.io (unknown [100.96.12.19]) (Authenticated sender: lmn-TZDUIOWCRQMW) by relay.mailchannels.net (Postfix) with ESMTPA id 05B50681196; Fri, 16 Mar 2018 17:55:47 +0000 (UTC) X-Sender-Id: lmn-tzduiowcrqmw|x-authsender|icenowy@aosc.io Received: from hermes.aosc.io (hermes.aosc.io [172.19.42.59]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384) by 0.0.0.0:2500 (trex/5.14.1); Fri, 16 Mar 2018 17:55:48 +0000 X-MC-Relay: Neutral X-MailChannels-SenderId: lmn-tzduiowcrqmw|x-authsender|icenowy@aosc.io X-MailChannels-Auth-Id: lmn-TZDUIOWCRQMW X-Suffer-Spicy: 6df3ca6e0ccb7761_1521222948538_2465456675 X-MC-Loop-Signature: 1521222948538:2569453157 X-MC-Ingress-Time: 1521222948538 Received: from localhost (localhost [127.0.0.1]) (Authenticated sender: icenowy@aosc.io) by hermes.aosc.io (Postfix) with ESMTPSA id E7359598B9; Fri, 16 Mar 2018 17:55:43 +0000 (UTC) From: Icenowy Zheng To: Rob Herring , Maxime Ripard , Chen-Yu Tsai Subject: [PATCH 2/7] dt-bindings: add binding for the Allwinner A64 DE2 bus Date: Sat, 17 Mar 2018 01:53:49 +0800 Message-Id: <20180316175354.21437-3-icenowy@aosc.io> In-Reply-To: <20180316175354.21437-1-icenowy@aosc.io> References: <20180316175354.21437-1-icenowy@aosc.io> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180316_105606_932863_43F8555B X-CRM114-Status: GOOD ( 15.66 ) 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: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Icenowy Zheng MIME-Version: 1.0 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 All the sub-blocks of Allwinner A64 DE2 needs the SRAM C on A64 SoC to be claimed, otherwise the whole DE2 space is inaccessible. Add a device tree binding of the DE2 part as a sub-bus. Signed-off-by: Icenowy Zheng --- .../devicetree/bindings/bus/sun50i-de2-bus.txt | 37 ++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 Documentation/devicetree/bindings/bus/sun50i-de2-bus.txt diff --git a/Documentation/devicetree/bindings/bus/sun50i-de2-bus.txt b/Documentation/devicetree/bindings/bus/sun50i-de2-bus.txt new file mode 100644 index 000000000000..87dfb33fb3be --- /dev/null +++ b/Documentation/devicetree/bindings/bus/sun50i-de2-bus.txt @@ -0,0 +1,37 @@ +Device tree bindings for Allwinner A64 DE2 bus + +The Allwinner A64 DE2 is on a special bus, which needs a SRAM region (SRAM C) +to be claimed for enabling the access. + +Required properties: + + - compatible: Should contain "allwinner,sun50i-a64-de2" + - reg: A resource specifier for the register space + - #address-cells: Must be set to 1 + - #size-cells: Must be set to 1 + - ranges: Must be set up to map the address space inside the + DE2, for the sub-blocks of DE2. + - allwinner,sram: the SRAM that needs to be claimed + +Example: + + de2@1000000 { + compatible = "allwinner,sun50i-a64-de2"; + reg = <0x1000000 0x400000>; + allwinner,sram = <&de2_sram 1>; + #address-cells = <1>; + #size-cells = <1>; + ranges = <0 0x1000000 0x400000>; + + display_clocks: clock@0 { + compatible = "allwinner,sun50i-a64-de2-clk"; + reg = <0x0 0x100000>; + clocks = <&ccu CLK_DE>, + <&ccu CLK_BUS_DE>; + clock-names = "mod", + "bus"; + resets = <&ccu RST_BUS_DE>; + #clock-cells = <1>; + #reset-cells = <1>; + }; + };