From patchwork Fri Jun 22 12:45:35 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Icenowy Zheng X-Patchwork-Id: 10482015 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 6821A602CB for ; Fri, 22 Jun 2018 12:48:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 472C326E1A for ; Fri, 22 Jun 2018 12:48:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3BC6828C45; Fri, 22 Jun 2018 12:48:35 +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=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI 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 CE68326E1A for ; Fri, 22 Jun 2018 12:48:34 +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: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:In-Reply-To: References:List-Owner; bh=YfqP9WUrUA81ZlaS5rdVsgkNOuCdxAOIj6qPwvC7o3A=; b=JmW NuAD/oZTSydgVvcYRpwgoGDiKGUwpQWFGIG6FGPw70F8RN/GeTzoy3OlmNKEMoRKefOMKcq5sZbVn XGEH4QhxQ9q/6/nBuQbcGs/ykqqkP8yu706aavRPIKdv7HvNYoi2R3FdYXX0wU4yDHHrOtcVRNFPz Diqx9BNnYN43m6qI6fGoUDVNhcH0Mo8vu7cLmdFnMiMT2GYutHa2u/otNEslrhac1hlCFk28ADqMZ 6HWVd3HJVJuSTx7iCPZvKJeJ+XBw67LcUHhQIA6dAJP42f98WOlEN+Tp0UGWmLjYYz9ycXYSZWb2J CkfDq6WaK3eACdvbQsDoslmVUOA/m8A==; 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 1fWLUI-00030u-LV; Fri, 22 Jun 2018 12:48:26 +0000 Received: from glow.birch.relay.mailchannels.net ([23.83.209.71]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fWLTX-0002eZ-8s for linux-arm-kernel@lists.infradead.org; Fri, 22 Jun 2018 12:48:06 +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 83A9468251A; Fri, 22 Jun 2018 12:47:22 +0000 (UTC) Received: from hermes.aosc.io (unknown [100.96.30.19]) (Authenticated sender: lmn-TZDUIOWCRQMW) by relay.mailchannels.net (Postfix) with ESMTPA id A8219682554; Fri, 22 Jun 2018 12:47:21 +0000 (UTC) X-Sender-Id: lmn-tzduiowcrqmw|x-authsender|icenowy@aosc.io Received: from hermes.aosc.io (hermes.aosc.io [172.19.36.153]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384) by 0.0.0.0:2500 (trex/5.15.2); Fri, 22 Jun 2018 12:47:22 +0000 X-MC-Relay: Neutral X-MailChannels-SenderId: lmn-tzduiowcrqmw|x-authsender|icenowy@aosc.io X-MailChannels-Auth-Id: lmn-TZDUIOWCRQMW X-Shelf-Callous: 2cc9f2786a4c5128_1529671642373_3903353662 X-MC-Loop-Signature: 1529671642372:1829106041 X-MC-Ingress-Time: 1529671642372 Received: from localhost (localhost [127.0.0.1]) (Authenticated sender: icenowy@aosc.io) by hermes.aosc.io (Postfix) with ESMTPSA id 2943962ECA; Fri, 22 Jun 2018 12:47:08 +0000 (UTC) From: Icenowy Zheng To: Rob Herring , Maxime Ripard , Chen-Yu Tsai , Jagan Teki , Jernej Skrabec Subject: [PATCH v2 2/7] dt-bindings: add binding for the Allwinner A64 DE2 bus Date: Fri, 22 Jun 2018 20:45:35 +0800 Message-Id: <20180622124540.56203-1-icenowy@aosc.io> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180622_054739_465650_C90C981A X-CRM114-Status: GOOD ( 16.45 ) 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 Reviewed-by: Rob Herring --- No changes since v1. .../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>; + }; + };