From patchwork Tue Jan 14 23:38:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Packham X-Patchwork-Id: 205726 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=-3.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=no 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 DD1F2C33CB6 for ; Tue, 14 Jan 2020 23:39:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A8C112467A for ; Tue, 14 Jan 2020 23:39:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=alliedtelesis.co.nz header.i=@alliedtelesis.co.nz header.b="Lg0rW4rl" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728896AbgANXjM (ORCPT ); Tue, 14 Jan 2020 18:39:12 -0500 Received: from gate2.alliedtelesis.co.nz ([202.36.163.20]:51173 "EHLO gate2.alliedtelesis.co.nz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728897AbgANXjM (ORCPT ); Tue, 14 Jan 2020 18:39:12 -0500 Received: from mmarshal3.atlnz.lc (mmarshal3.atlnz.lc [10.32.18.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by gate2.alliedtelesis.co.nz (Postfix) with ESMTPS id E6C8F886BF; Wed, 15 Jan 2020 12:39:09 +1300 (NZDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alliedtelesis.co.nz; s=mail181024; t=1579045149; bh=AlrvdzgXjpGDa7SNMjyhBnNMn4axze8b5Yq4/Y8xnRk=; h=From:To:Cc:Subject:Date; b=Lg0rW4rlK/jlRXPm8U0gngunNAFrHWqT1ZgaqLyIxfSYRd840vuA5N7RJQWoETPsm 4dAkWkj/wWuusOLS6QqgBLWvz+7lHz1mdKKCceXk4f+srRZ1hoWhtyu/t/YzYvQ1Ad Phxy6P7b2+PhhyaUb+SJECL9aqZPAqeVLuP8BuwAhkDUORFNR2cXhv3ZWcMNLmMnmE ajI8lPqwy5TCA6t6Pzv+Y5cIHYN5VSA4+zcjKFS+/7GdAlVk8azyiTwLIhxNhZMn4S +N0z21B/1qQJDlcnYW2mUoFi+c5pag9cAPoKR3vO1m+lamlr/M+Gye3+cQmt0tfvn2 CVDBqFmiCkHPg== Received: from smtp (Not Verified[10.32.16.33]) by mmarshal3.atlnz.lc with Trustwave SEG (v7, 5, 8, 10121) id ; Wed, 15 Jan 2020 12:39:08 +1300 Received: from chrisp-dl.ws.atlnz.lc (chrisp-dl.ws.atlnz.lc [10.33.22.20]) by smtp (Postfix) with ESMTP id 1227613EC73; Wed, 15 Jan 2020 12:39:08 +1300 (NZDT) Received: by chrisp-dl.ws.atlnz.lc (Postfix, from userid 1030) id 5FAEA280071; Wed, 15 Jan 2020 12:39:08 +1300 (NZDT) From: Chris Packham To: broonie@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com Cc: anthony.derosa@syscall7.com, linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Chris Packham Subject: [PATCH 0/2] SPI bus multiplexing Date: Wed, 15 Jan 2020 12:38:54 +1300 Message-Id: <20200114233857.25933-1-chris.packham@alliedtelesis.co.nz> X-Mailer: git-send-email 2.25.0 MIME-Version: 1.0 x-atlnz-ls: pat Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This is a revisit of two earlier efforts to add more complex mutliplexing to SPI busses. https://patchwork.kernel.org/patch/2706151/ https://patchwork.kernel.org/patch/10897255/ This version makes use of the general purpose mux controller which simplifies things greatly. Chris Packham (2): dt-bindings: spi: Document binding for generic SPI multiplexer spi: Add generic SPI multiplexer .../devicetree/bindings/spi/spi-mux.yaml | 82 ++++++++ drivers/spi/Kconfig | 12 ++ drivers/spi/Makefile | 1 + drivers/spi/spi-mux.c | 189 ++++++++++++++++++ 4 files changed, 284 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/spi-mux.yaml create mode 100644 drivers/spi/spi-mux.c