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=-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 BEB04C4338F for ; Tue, 3 Aug 2021 11:37:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A11DD60560 for ; Tue, 3 Aug 2021 11:37:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235820AbhHCLhf (ORCPT ); Tue, 3 Aug 2021 07:37:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43714 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235937AbhHCLhW (ORCPT ); Tue, 3 Aug 2021 07:37:22 -0400 Received: from mail-pj1-x1030.google.com (mail-pj1-x1030.google.com [IPv6:2607:f8b0:4864:20::1030]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 303A6C061798 for ; Tue, 3 Aug 2021 04:37:12 -0700 (PDT) Received: by mail-pj1-x1030.google.com with SMTP id q17-20020a17090a2e11b02901757deaf2c8so4317429pjd.0 for ; Tue, 03 Aug 2021 04:37:12 -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=lx8aY+/yDtRv3FLOutHx5ZS4iEMyIdYBOMCpO0cyw18=; b=BUOS8Ggwq+VCAPWWigjVP6z8eL2qBxxXXQBzAIuTNLlNZXZxPG4jPoV/9pRshmmPte gdH/a/PdZt30r1WZkEoC+6upgD9f6cwEtXdpNuhy0qY08oNZlxyYLMPfb18zMZPmljTc 3cDhZ3vYl3qbrLYPUjkmv54kKQyMdH5yBLC20skpM3bXCbOFTTgAHbWUqn8OPDGin1MB KOvd+xRYIi+k8vyURRBTnFR5+8q5NpLedWzLZx0hXEOzdeTtZJWK5Cumwh4BSnUcaVMe 7/OWuyQr0QVSOq/aLUQyLSZNCaWBAMGGzuca90NABo62tyJ0KZytiDXryJ0BAf73yI7V gtmg== 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=lx8aY+/yDtRv3FLOutHx5ZS4iEMyIdYBOMCpO0cyw18=; b=BxfhSvZjVlPpcGieOYujW1QyxgMA7P9yyi/X82h+WNmNlxcKNPL7WvBsj0JrhI7gtA 46tXllitQXc/ttXeVdJf2NmkmSyIzMeNlxET2JndkpStdBBnlGFne9c9Ka9087f2dlYF Y5LQ9gWmAIHxMrTrQzl97ff625RbCr1Ue0bBO1Px+vMLoEgiDHv1PWcTLpjCQCAXknBO iu9CCAZJBs+w8LvxdYLBvJO8bAjD83B47xem6KtnegDCD6/k6g8Pq7zu6xDSvTwneMQJ F75ZrU0oFWAR8gShL8coXHiC3m5DLLgblwmwM56sxS13nOOfO1oYhOvNMMtqdUxwZCQN DybA== X-Gm-Message-State: AOAM530uyEabIHHfk7RQY7AcueZ9lE9yIg7i8G6tem/t4UGLeKh2ZE+k MjWI51/Qg+WVyAUSez+rnFAHYw== X-Google-Smtp-Source: ABdhPJza6By/DI7WFRBuWNKSnUEnJyrqLv1g7UqN9TlFDao7Pbvy0JReR7BuPUrsYAZVWyN05p6Fiw== X-Received: by 2002:a63:120e:: with SMTP id h14mr647881pgl.215.1627990631637; Tue, 03 Aug 2021 04:37:11 -0700 (PDT) Received: from localhost ([122.172.201.85]) by smtp.gmail.com with ESMTPSA id s36sm17710157pgk.64.2021.08.03.04.37.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Aug 2021 04:37:11 -0700 (PDT) From: Viresh Kumar To: Arnd Bergmann , Linus Walleij , Bartosz Golaszewski , "Enrico Weigelt, metux IT consult" , Jason Wang , "Michael S. Tsirkin" , Viresh Kumar Cc: Viresh Kumar , Vincent Guittot , Jean-Philippe Brucker , Bill Mills , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Cornelia Huck , Geert Uytterhoeven , stratos-dev@op-lists.linaro.org, linux-kernel@vger.kernel.org, Thomas Gleixner , Marc Zyngier , linux-gpio@vger.kernel.org, virtualization@lists.linux-foundation.org Subject: [PATCH V4 0/2] gpio: Add virtio based driver Date: Tue, 3 Aug 2021 17:06:54 +0530 Message-Id: X-Mailer: git-send-email 2.31.1.272.g89b43f80a514 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, This adds Virtio GPIO driver based on the proposed specification [1]. The specification for basic GPIO operations is already reviewed by Linus and Arnd, while the IRQ stuff is still under discussion and not finalized. I am sharing the code, so everyone gets more clarity on how it will work eventually in Linux. I have tested this patchset with Qemu guest with help of the libgpiod utility. I have also tested basic handling of interrupts on the guest side. It works as expected. The host side virtio-backend isn't ready yet and my tests only tested the flow control between guest and host, but didn't play with real GPIO pins. That will be done once I have a working backend in place (WIP). V3->V4: - Lots of changes, as the specification changed too much. Better forget everything we have done until now :) -- Viresh [1] https://lists.oasis-open.org/archives/virtio-dev/202107/msg00232.html Viresh Kumar (2): gpio: Add virtio-gpio driver gpio: virtio: Add IRQ support MAINTAINERS | 7 + drivers/gpio/Kconfig | 10 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-virtio.c | 648 +++++++++++++++++++++++++++++++ include/uapi/linux/virtio_gpio.h | 72 ++++ 5 files changed, 738 insertions(+) create mode 100644 drivers/gpio/gpio-virtio.c create mode 100644 include/uapi/linux/virtio_gpio.h -- 2.31.1.272.g89b43f80a514