From patchwork Tue Jul 27 05:23:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Viresh Kumar X-Patchwork-Id: 486959 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=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 7577CC4320A for ; Tue, 27 Jul 2021 05:24:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 53E28610FE for ; Tue, 27 Jul 2021 05:24:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233553AbhG0FX7 (ORCPT ); Tue, 27 Jul 2021 01:23:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36060 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235063AbhG0FX6 (ORCPT ); Tue, 27 Jul 2021 01:23:58 -0400 Received: from mail-pl1-x62e.google.com (mail-pl1-x62e.google.com [IPv6:2607:f8b0:4864:20::62e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 50275C061760 for ; Mon, 26 Jul 2021 22:23:58 -0700 (PDT) Received: by mail-pl1-x62e.google.com with SMTP id c11so14410696plg.11 for ; Mon, 26 Jul 2021 22:23:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=m4PnQ7w4ZXIbpbMOd9mPAvOkoi0Otfkeze5HMzWqDSM=; b=o00HtKxdOf6pgzaZcv7v0RCIAoZcftZntng7XdmVuSjqtZ2b8wjG0kSMM7lu+GX68P 2rGAKWvz/uQTh7cL6jW438A+V9TeI9mbi7wXXpHEaCUsQO3V1v4i0tPJOb0ngMv0Bs+3 M9LJQEIBANelTQ65JuIiInXty805GkKN7ycj23u1RGZ6a/GCtZlF8xOOaDiuOcC7b8mI iengHNowfdX5rLoqaQAOYI41O5sesvJCvfaY/KTyhE0bpWP0nsq021X7Jjh657Cqg/eO 0GRu4vqdaCm4aOorJ9S1mFCYSrxF5VM0sNpLMnvGF5x3CVa7NcLr3JdNlz1zonTq6BAo paYw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=m4PnQ7w4ZXIbpbMOd9mPAvOkoi0Otfkeze5HMzWqDSM=; b=NnZAkB+VKIH2KM7k5OVQsT6lpGEhOjRpwX514MuiMcjMVHVZAGdk0uPBfqqu9ViHBC /gMOxSGehj9WN74EfSnQCHAOwLF+gCWa4F8dqS614UJGiSiE10AxdPyndMMvTaXAYmv7 +CX48jY55SJkrvjTX7OHQPJYyUyrlf3M8eo8arzhKJ0qDagOE/lw1MVEov3D5Sdu26MZ CuNb0JRKzztvLYCa7JVZq0W6zNU1Q7m5i13pMGXfppjtiCdOc8Zub0civAjC2US8ho+D 1Cx85M7D74rXWgAbIYRMwrpA78+NsFYGpJPZeeHl8XieqXxxqGClm/21TBPE4KPNBPxk Hfug== X-Gm-Message-State: AOAM533tpjhN8pJfKgVT6ylE5FsTYS9XrBda8eNmaOGcKKkNacXdEnCa +sEaePJW2QcMgXmNTpMz58MttQ== X-Google-Smtp-Source: ABdhPJy/IRVuyZuRXHBDpEnTOVpnPmvmUefMG1xV1ZaD3TQ9HJ4t8TjZaCD2LotwfkdOo+epC0N74Q== X-Received: by 2002:a17:90b:1d84:: with SMTP id pf4mr20491531pjb.166.1627363437795; Mon, 26 Jul 2021 22:23:57 -0700 (PDT) Received: from localhost ([122.172.201.85]) by smtp.gmail.com with ESMTPSA id f18sm1903790pfe.25.2021.07.26.22.23.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Jul 2021 22:23:57 -0700 (PDT) From: Viresh Kumar To: Jason Wang , "Michael S. Tsirkin" , Rob Herring , Arnd Bergmann , Jean-Philippe Brucker , Bartosz Golaszewski , Linus Walleij , Viresh Kumar Cc: Vincent Guittot , Bill Mills , =?utf-8?q?Alex_Benn=C3=A9e?= , "Enrico Weigelt, metux IT consult" , Jie Deng , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Arnd Bergmann , linux-gpio@vger.kernel.org, linux-i2c@vger.kernel.org, Wolfram Sang Subject: [PATCH V4 0/5] virtio: Add virtio-device bindings Date: Tue, 27 Jul 2021 10:53:47 +0530 Message-Id: X-Mailer: git-send-email 2.31.1.272.g89b43f80a514 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Hi, Currently the DT only provides support for following node types for virtio-mmio nodes: virtio_mmio@a000000 { dma-coherent; interrupts = <0x00 0x10 0x01>; reg = <0x00 0xa000000 0x00 0x200>; compatible = "virtio,mmio"; }; Here, each virtio-mmio corresponds to a virtio-device. But there is no way for other users in the DT to show their dependency on virtio devices. This patchset provides that support. The first patch adds virtio-device bindings to allow for device sub-nodes to be present and the second patch updates the virtio core to update the of_node. Other patches add bindings for i2c and gpio devices. Tested on x86 with qemu for arm64. V3->V4: - The binding is named "virtio,deviceXXXXXXXX" now. - The virtio binding doesn't restrict the node names anymore. - The i2c/gpio nodes are named i2c and gpio now. - Dropped including gpio.yaml. - Updated code to match the new binding name. - Use "type: object" in additional-property. V2/2.1->V3: - Added review-tags from Arnd and Wolfram. - Only the 5th patch changed otherwise: - Use of_device_is_compatible() instead of keeping a list of devices. - Use snprintf (with BUG_ON on return value) to create the compatible string, whose length is fixed using "virtio,XXXXXXXX". - Use dev_of_node(). V1->V2: - The changes (both binding and code) are made at virtio level, instead of virtio-mmio. This allows the same to be used by all device types, irrespective of the transport mechanism. - Dropped the reg property and used compatible in the form "virtio,". - Dropped dt-bindings/virtio/virtio_ids.h. - Add a patch to sync virtio-ids from spec, required for the last patch. --- Viresh Viresh Kumar (5): dt-bindings: virtio: Add binding for virtio devices dt-bindings: i2c: Add bindings for i2c-virtio dt-bindings: gpio: Add bindings for gpio-virtio uapi: virtio_ids: Sync ids with specification virtio: Bind virtio device to device-tree node .../devicetree/bindings/gpio/gpio-virtio.yaml | 59 +++++++++++++++++++ .../devicetree/bindings/i2c/i2c-virtio.yaml | 51 ++++++++++++++++ .../devicetree/bindings/virtio/mmio.yaml | 3 +- .../bindings/virtio/virtio-device.yaml | 41 +++++++++++++ drivers/virtio/virtio.c | 57 +++++++++++++++++- include/uapi/linux/virtio_ids.h | 12 ++++ 6 files changed, 219 insertions(+), 4 deletions(-) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-virtio.yaml create mode 100644 Documentation/devicetree/bindings/i2c/i2c-virtio.yaml create mode 100644 Documentation/devicetree/bindings/virtio/virtio-device.yaml