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=-12.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 7F1DBC3B186 for ; Wed, 12 Feb 2020 23:58:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5320C206E5 for ; Wed, 12 Feb 2020 23:58:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581551916; bh=YxOu/xZsV3EHzIioIvp3r1FDPQKUmaKetuS4vrICO9I=; h=Date:From:To:Cc:Subject:In-Reply-To:List-ID:From; b=KxW9m1CURwc1e4R9wENuupS/XqRoYH09TfmEp9v4qC5ddiUxqp57kHryRlFwvxVat XYP8B4Slg3Q2gPLgnbWvqKVJPEYq5W1KG/6WJHApqUUha6rSfekX8pymEnzeDnrOJL mxJrsIL3xYjWb2Q9geZw4G8s71Z9b8GBe8cuTNRQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729364AbgBLX6d (ORCPT ); Wed, 12 Feb 2020 18:58:33 -0500 Received: from foss.arm.com ([217.140.110.172]:39856 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729103AbgBLX6c (ORCPT ); Wed, 12 Feb 2020 18:58:32 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 0F9FA101E; Wed, 12 Feb 2020 15:58:32 -0800 (PST) Received: from localhost (unknown [10.37.6.21]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 885CC3F68E; Wed, 12 Feb 2020 15:58:31 -0800 (PST) Date: Wed, 12 Feb 2020 23:58:30 +0000 From: Mark Brown To: Chris Packham Cc: Andy Shevchenko , broonie@kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, Mark Brown , mark.rutland@arm.com, robh+dt@kernel.org Subject: Applied "dt-bindings: spi: Document binding for generic SPI multiplexer" to the spi tree In-Reply-To: <20200204032838.20739-2-chris.packham@alliedtelesis.co.nz> Message-Id: X-Patchwork-Hint: ignore Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The patch dt-bindings: spi: Document binding for generic SPI multiplexer has been applied to the spi tree at https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-5.7 All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >From d548ed71cb8862c96a1a8d17861bb5dabd1e2299 Mon Sep 17 00:00:00 2001 From: Chris Packham Date: Tue, 4 Feb 2020 16:28:37 +1300 Subject: [PATCH] dt-bindings: spi: Document binding for generic SPI multiplexer Add binding documentation for the spi-mux driver. This allows a generic multiplexer to be used to provide access to multiple SPI devices. Signed-off-by: Chris Packham Reviewed-by: Rob Herring Link: https://lore.kernel.org/r/20200204032838.20739-2-chris.packham@alliedtelesis.co.nz Signed-off-by: Mark Brown --- .../devicetree/bindings/spi/spi-mux.yaml | 89 +++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/spi-mux.yaml diff --git a/Documentation/devicetree/bindings/spi/spi-mux.yaml b/Documentation/devicetree/bindings/spi/spi-mux.yaml new file mode 100644 index 000000000000..0ae692dc28b5 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/spi-mux.yaml @@ -0,0 +1,89 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/spi/spi-mux.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Generic SPI Multiplexer + +description: | + This binding describes a SPI bus multiplexer to route the SPI chip select + signals. This can be used when you need more devices than the SPI controller + has chip selects available. An example setup is shown in ASCII art; the actual + setting of the multiplexer to a channel needs to be done by a specific SPI mux + driver. + + MOSI /--------------------------------+--------+--------+--------\ + MISO |/------------------------------+|-------+|-------+|-------\| + SCL ||/----------------------------+||------+||------+||------\|| + ||| ||| ||| ||| ||| + +------------+ ||| ||| ||| ||| + | SoC ||| | +-+++-+ +-+++-+ +-+++-+ +-+++-+ + | ||| | | dev | | dev | | dev | | dev | + | +--+++-+ | CS-X +------+\ +--+--+ +--+--+ +--+--+ +--+--+ + | | SPI +-|-------+ Mux |\\ CS-0 | | | | + | +------+ | +--+---+\\\-------/ CS-1 | | | + | | | \\\----------------/ CS-2 | | + | +------+ | | \\-------------------------/ CS-3 | + | | ? +-|----------/ \----------------------------------/ + | +------+ | + +------------+ + +allOf: + - $ref: "/schemas/spi/spi-controller.yaml#" + +maintainers: + - Chris Packham + +properties: + compatible: + const: spi-mux + + mux-controls: + maxItems: 1 + +required: + - compatible + - reg + - spi-max-frequency + - mux-controls + +examples: + - | + #include + mux: mux-controller { + compatible = "gpio-mux"; + #mux-control-cells = <0>; + + mux-gpios = <&gpio0 3 GPIO_ACTIVE_HIGH>; + }; + + spi { + #address-cells = <1>; + #size-cells = <0>; + spi@0 { + compatible = "spi-mux"; + reg = <0>; + #address-cells = <1>; + #size-cells = <0>; + spi-max-frequency = <100000000>; + + mux-controls = <&mux>; + + spi-flash@0 { + compatible = "jedec,spi-nor"; + reg = <0>; + #address-cells = <1>; + #size-cells = <0>; + spi-max-frequency = <40000000>; + }; + + spi-device@1 { + compatible = "lineartechnology,ltc2488"; + reg = <1>; + #address-cells = <1>; + #size-cells = <0>; + spi-max-frequency = <10000000>; + }; + }; + }; -- 2.20.1