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: 1056573 Return-Path: X-Original-To: incoming-imx@patchwork.ozlabs.org Delivered-To: patchwork-incoming-imx@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=nic.cz Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="DkuskG/z"; dkim=fail reason="signature verification failed" (1024-bit key; secure) header.d=nic.cz header.i=@nic.cz header.b="MHDPhn54"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 44KsPx2SZNz9s3l for ; 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Thu, 14 Mar 2019 15:02:21 +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-Spam-Score: -5.2 (-----) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-5.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [2001:1488:800:400:0:0:0:400 listed in] [list.dnswl.org] -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list 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?Marek_Beh?= =?utf-8?b?w7pu?= , 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+incoming-imx=patchwork.ozlabs.org@lists.infradead.org List-Id: linux-imx-kernel.lists.patchwork.ozlabs.org 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 BehĂșn 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