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=-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 C368AC2D0DB for ; Mon, 27 Jan 2020 21:04:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 829FC24656 for ; Mon, 27 Jan 2020 21:04:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=alliedtelesis.co.nz header.i=@alliedtelesis.co.nz header.b="UYaETZAL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726323AbgA0VEa (ORCPT ); Mon, 27 Jan 2020 16:04:30 -0500 Received: from gate2.alliedtelesis.co.nz ([202.36.163.20]:41959 "EHLO gate2.alliedtelesis.co.nz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726164AbgA0VEa (ORCPT ); Mon, 27 Jan 2020 16:04:30 -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 42F078365B; Tue, 28 Jan 2020 10:04:27 +1300 (NZDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alliedtelesis.co.nz; s=mail181024; t=1580159067; bh=zObOk1gVPEvabf/4BaqStZTqrwbvqmmwomyYCQ/yN4g=; h=From:To:Cc:Subject:Date; b=UYaETZALE0H7ZSGG/Rn6jhVwjKzKAsshnEuTczDwb4IZbCu/cTL8KG4IHCpGXscCd z7bFZ28yTtsCpKvBUnWIzl/7HSbv/1yRp4uZQ6pYN7CAYiHbRii0keDOjQA01mk3nr Yg7ynGDSoKffdjGdqrNELZdV522vd3n1uXCIVoytjYj7ZcN+moHQg/YMNsmDSmU5dt nHWUYVbCWFbrMwwfWJxEs+OGbr6dyZLBYv7y52IPH6Y5PmUy8WGOMcV/bS5QRJOhAB HsIPrAQ1kQmOc/eQIA/WUAIKth/sIXYI7N02xwH4SW/R6o/10pSgGjCiZEarI0NRdE iZrGVSVH0KuGg== Received: from smtp (Not Verified[10.32.16.33]) by mmarshal3.atlnz.lc with Trustwave SEG (v7,5,8,10121) id ; Tue, 28 Jan 2020 10:04:27 +1300 Received: from chrisp-dl.ws.atlnz.lc (chrisp-dl.ws.atlnz.lc [10.33.22.20]) by smtp (Postfix) with ESMTP id B7AA313EEC9; Tue, 28 Jan 2020 10:04:21 +1300 (NZDT) Received: by chrisp-dl.ws.atlnz.lc (Postfix, from userid 1030) id E318C280071; Tue, 28 Jan 2020 10:04:21 +1300 (NZDT) From: Chris Packham To: broonie@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com Cc: linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Chris Packham Subject: [PATCH v3 0/2] SPI bus multiplexing Date: Tue, 28 Jan 2020 10:04:13 +1300 Message-Id: <20200127210415.5708-1-chris.packham@alliedtelesis.co.nz> X-Mailer: git-send-email 2.25.0 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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 simpli= fies things greatly. One outstanding problem is the need for the spi-max-frequency on the mux device. This is not used for anything and is just needed to satisfy the s= pi driver infrastructure which expects all spi devices to have this property= . Chris Packham (2): dt-bindings: spi: Document binding for generic SPI multiplexer spi: Add generic SPI multiplexer .../devicetree/bindings/spi/spi-mux.yaml | 89 +++++++++ drivers/spi/Kconfig | 12 ++ drivers/spi/Makefile | 1 + drivers/spi/spi-mux.c | 189 ++++++++++++++++++ 4 files changed, 291 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/spi-mux.yaml create mode 100644 drivers/spi/spi-mux.c --=20 2.25.0