From patchwork Thu Mar 14 15:01:35 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marek_Beh=C3=BAn?= X-Patchwork-Id: 10853043 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 635F3139A for ; Thu, 14 Mar 2019 15:02:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4CDCA2A5CF for ; Thu, 14 Mar 2019 15:02:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4A5C42A5F7; Thu, 14 Mar 2019 15:02:29 +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 573E72A5DF for ; Thu, 14 Mar 2019 15:02:28 +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=T88ZlboNV3CJYo4FAxj7B9888kQf2x5axywZ5ZQq8Ck=; b=DkuskG/z9WDBX5 KcEoxDE4m7in/rKqh3mj9FhZPbsgrO8zaEvifSW/4/Sisb4IlzMY6SBwLlXh5x3ynwxkKq6m4CjhL 1DesStQjLft6LpkHs8Sh2PY1R6WUKe/an6zUbtBqUcVVNokNU38SoKqqLXk8PtdD0ysSZLCNl50Ds aMF5pb7sP6nk4A4X2OtpjpnBfXwafIUdS51cAy+kgre76wSsXhIQyeiRI0e0GWbLO7wK5tbBFdNRL FY18oTnN41bTZCk38iMMR3YajTrxdU0eYpKzXfXBcCyNoHIkMTHDZqkp1ySjtiJZ27Ip482Yb0vme ovD5h/myNI1H58sLp/GA==; 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 1h4RsC-0000ua-Tz; Thu, 14 Mar 2019 15:02:20 +0000 Received: from mail.nic.cz ([2001:1488:800:400::400]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1h4Rs8-0000tf-QC for linux-arm-kernel@lists.infradead.org; Thu, 14 Mar 2019 15:02:18 +0000 Received: from dellmb.labs.office.nic.cz (unknown [IPv6:2001:1488:fffe:6:cac7:3539:7f1f:463]) by mail.nic.cz (Postfix) with ESMTP id B7849601B9; Thu, 14 Mar 2019 16:02:10 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1552575730; bh=z/VntqA6mUbnpmvU2cVG8YcDHU+QQQM3Ynj0lpfK9zg=; h=From:To:Date; b=MHDPhn54OJzBjx4o3OCBiVF1p8ZgNYPp4oWTCpQBhFdup0doxLnbJrZw7uXc2guyU SBJgdmEEirOvQs9xdOPSpgGOoQ5QpzvjCT6c65b+QFhsJAvCatrIg5fxdWa7BGunQk ZinBsS74FfWpV2XRiUDbOR1P3BofvF72+ZV5df5Q= From: =?utf-8?q?Marek_Beh=C3=BAn?= To: Linus Walleij Subject: [PATCH v4.1 armsoc/drivers/bus+gpio 2/5] dt-bindings: bus: Document moxtet bus binding Date: Thu, 14 Mar 2019 16:01:35 +0100 Message-Id: <20190314150135.4362-1-marek.behun@nic.cz> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20190311225906.GA9056@bogus> References: <20190307125251.724-1-marek.behun@nic.cz> <20190307125251.724-3-marek.behun@nic.cz> <20190311225906.GA9056@bogus> MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.99.2 at mail X-Virus-Status: Clean X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190314_080217_501685_FA32E4E7 X-CRM114-Status: GOOD ( 12.98 ) 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, Arnd Bergmann , Tony Lindgren , linux-kernel@vger.kernel.org, =?utf-8?q?M?= =?utf-8?q?arek_Beh=C3=BAn?= , linux-gpio@vger.kernel.org, Rob Herring , Shawn Guo , linux-arm-kernel@lists.infradead.org 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 This adds device tree binding documentation for the Moxtet bus, a bus via which the different modules connected to the Turris Mox router can be configured. Signed-off-by: Marek Behún Cc: Rob Herring Cc: devicetree@vger.kernel.org Reviewed-by: Rob Herring --- .../devicetree/bindings/bus/moxtet.txt | 44 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 45 insertions(+) create mode 100644 Documentation/devicetree/bindings/bus/moxtet.txt diff --git a/Documentation/devicetree/bindings/bus/moxtet.txt b/Documentation/devicetree/bindings/bus/moxtet.txt new file mode 100644 index 000000000000..7be9d00c1767 --- /dev/null +++ b/Documentation/devicetree/bindings/bus/moxtet.txt @@ -0,0 +1,46 @@ +Turris Mox module status and configuration bus (over SPI) + +Required properties: + - compatible : Should be "cznic,moxtet" + - #address-cells : Has to be 1 + - #size-cells : Has to be 0 + - spi-cpol : Required inverted clock polarity + - spi-cpha : Required shifted clock phase + - interrupts : Must contain reference to the shared interrupt line + - interrupt-controller : Required + - #interrupt-cells : Has to be 1 + +For other required and optional properties of SPI slave nodes please refer to +../spi/spi-bus.txt. + +Required properties of subnodes: + - reg : Should be position on the Moxtet bus (how many Moxtet + modules are between this module and CPU module, so + either 0 or a positive integer) + +The driver finds the devices connected to the bus by itself, but it may be +needed to reference some of them from other parts of the device tree. In that +case the devices can be defined as subnodes of the moxtet node. + +Example: + + moxtet@1 { + compatible = "cznic,moxtet"; + #address-cells = <1>; + #size-cells = <0>; + reg = <1>; + spi-max-frequency = <10000000>; + spi-cpol; + spi-cpha; + interrupt-controller; + #interrupt-cells = <1>; + interrupt-parent = <&gpiosb>; + interrupts = <5 IRQ_TYPE_EDGE_FALLING>; + + moxtet_sfp: gpio@0 { + compatible = "cznic,moxtet-gpio"; + gpio-controller; + #gpio-cells = <2>; + reg = <0>; + } + }; diff --git a/MAINTAINERS b/MAINTAINERS index d96d36c83bc3..3f461a2d776a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1502,6 +1502,7 @@ ARM/CZ.NIC TURRIS MOX SUPPORT M: Marek Behun W: http://mox.turris.cz S: Maintained +F: Documentation/devicetree/bindings/bus/moxtet.txt F: include/linux/moxtet.h F: drivers/bus/moxtet.c