From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E7938C43381 for ; Fri, 1 Mar 2019 03:59:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B6CBD20857 for ; Fri, 1 Mar 2019 03:59:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=nic.cz header.i=@nic.cz header.b="WsfDQmwZ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729494AbfCAD7U (ORCPT ); Thu, 28 Feb 2019 22:59:20 -0500 Received: from mail.nic.cz ([217.31.204.67]:53115 "EHLO mail.nic.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727920AbfCAD7T (ORCPT ); Thu, 28 Feb 2019 22:59:19 -0500 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 79ABA63323; Fri, 1 Mar 2019 04:59:16 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1551412756; bh=xAfGaCBiJ/vfBIX69l+J1CGUUOEjRlsQiWtBpFmpPsc=; h=From:To:Date; b=WsfDQmwZp6Ehm4GS5hSGCsV+1N4XDFaRNR/9ZsWFYbIaiUANqL/Y7xDwGJcnp0lZe 9JEfwmlMkSQmF194YtF25JTtKgC7fF4PeHkotUdKRA/kp4HA8kgUYcnBlrlzybZ+4p m55kdKGmfUJzC4AAvKagOH3R/litaZXLwOt4BvKI= From: =?UTF-8?q?Marek=20Beh=C3=BAn?= To: Linus Walleij Cc: Tony Lindgren , Shawn Guo , linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Marek=20Beh=C3=BAn?= , Rob Herring , devicetree@vger.kernel.org Subject: [PATCH v3 bus+gpio 2/5] dt-bindings: bus: Document moxtet bus binding Date: Fri, 1 Mar 2019 04:58:49 +0100 Message-Id: <20190301035852.26780-3-marek.behun@nic.cz> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20190301035852.26780-1-marek.behun@nic.cz> References: <20190301035852.26780-1-marek.behun@nic.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Virus-Scanned: clamav-milter 0.99.2 at mail X-Virus-Status: Clean Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.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 Behún Cc: Rob Herring Cc: devicetree@vger.kernel.org --- .../devicetree/bindings/bus/moxtet.txt | 36 +++++++++++++++++++ 1 file changed, 36 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..2bb998cbd3ad --- /dev/null +++ b/Documentation/devicetree/bindings/bus/moxtet.txt @@ -0,0 +1,36 @@ +Turris Mox module 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 +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 + +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 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "cznic,moxtet"; + reg = <1>; + spi-max-frequency = <10000000>; + spi-cpol; + spi-cpha; + + moxtet_sfp: gpio@0 { + compatible = "cznic,moxtet-sfp"; + gpio-controller; + #gpio-cells = <2>; + reg = <0>; + } + }; -- 2.19.2