From patchwork Thu Dec 24 01:09:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Scally X-Patchwork-Id: 11989067 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,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 8AC7EC433E6 for ; Thu, 24 Dec 2020 01:11:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 569D92253D for ; Thu, 24 Dec 2020 01:11:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728880AbgLXBKs (ORCPT ); Wed, 23 Dec 2020 20:10:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48336 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728849AbgLXBKr (ORCPT ); Wed, 23 Dec 2020 20:10:47 -0500 Received: from mail-wm1-x329.google.com (mail-wm1-x329.google.com [IPv6:2a00:1450:4864:20::329]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1EA62C0611CD; Wed, 23 Dec 2020 17:09:39 -0800 (PST) Received: by mail-wm1-x329.google.com with SMTP id 3so382647wmg.4; Wed, 23 Dec 2020 17:09:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=pXfvbEbd97X9tgUcpgJXDMXX4T6+llrDk7Gc/FGg//Y=; b=pdkhJoVdBdsTNCQLRAjaKojDdYEwaTCipf3GHM8oSUxBocoHcjjT3geseMKBbCjvHG YG8/OU89/eMjiG3BDmEBuzf4EHpHjpl2YRpMweoz4hWowzXPT29rgpkjfL75kFb26cqv 4a6yBtGbROTA/7Pm202chdMDPUEtjSPw1fcwbPtyP/9CuiHXEzWh4Vnb7cpyZfYZORpV MGcGK87qDxzGfp0ZTRdXX1d6bofRWV98yvW5NecTfrCgrYKtyTfyJi+9Vrt4Pi7lRpoa ASDz0sllD9BK4OZoAI9ciZXnNvsmD+bcl2+SKk29gu0S+YywFXeTZvEM/bNKRSe3kfZY ThrA== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=pXfvbEbd97X9tgUcpgJXDMXX4T6+llrDk7Gc/FGg//Y=; b=K9xNNgXjvhE19I5Axwni+/EfBVf8qGEzHOjwQ8VTup07Ob6GSEtk4HB9dUzDTJ/wqD 9ePl2Lxzk6kcOW6mebafapxNpNMaoV+YLeNa5QW7jiZq4QsQ5ujxdo6bKWlS+hKsQyUh H9Ym9CsAlm6oUoDNJmX6/KgNKRKUzkK+pOndQCjQjBg4sXw0nZMvDVj9ZgTqklWT0vTC dD58tSMXR9FzXA3Dx+RK+XHtJMmYVv5rwf7gyz5MKUwziDUPRbfuxtiIz5loBhmhjMUU 56xfJ1h8DSojnphpI4wlWsMwdgWZnpxl5A+ql9/NRdkfoEjnkyQgHH9tRgcl8+5jrwLP gdgQ== X-Gm-Message-State: AOAM532Jkcyd40uqJgMI+wNdNUh+GbxsJLT/P4DygdEI4eNnFtTikdWq G3nyQki87MHN92N//NAomrcgS9DJLBcoCDWr X-Google-Smtp-Source: ABdhPJyn73S6Pxf3bJIidrjYtZpWabGA2Hoxk8EqIvh689uAsC2qIHypCJ8GD1MGWNQICEM4/qpIfg== X-Received: by 2002:a1c:6506:: with SMTP id z6mr1949588wmb.55.1608772177883; Wed, 23 Dec 2020 17:09:37 -0800 (PST) Received: from valhalla.home ([2.31.224.116]) by smtp.gmail.com with ESMTPSA id b200sm1598653wmb.10.2020.12.23.17.09.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Dec 2020 17:09:37 -0800 (PST) From: Daniel Scally To: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-media@vger.kernel.org, devel@acpica.org Cc: rjw@rjwysocki.net, lenb@kernel.org, gregkh@linuxfoundation.org, yong.zhi@intel.com, sakari.ailus@linux.intel.com, bingbu.cao@intel.com, tian.shu.qiu@intel.com, mchehab@kernel.org, robert.moore@intel.com, erik.kaneda@intel.com, pmladek@suse.com, rostedt@goodmis.org, sergey.senozhatsky@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, laurent.pinchart+renesas@ideasonboard.com, jacopo+renesas@jmondi.org, kieran.bingham+renesas@ideasonboard.com, hverkuil-cisco@xs4all.nl, m.felsch@pengutronix.de, niklas.soderlund+renesas@ragnatech.se, slongerbeam@gmail.com, heikki.krogerus@linux.intel.com, linus.walleij@linaro.org Subject: [PATCH v3 12/14] acpi: Add acpi_dev_get_next_match_dev() and helper macro Date: Thu, 24 Dec 2020 01:09:05 +0000 Message-Id: <20201224010907.263125-13-djrscally@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201224010907.263125-1-djrscally@gmail.com> References: <20201224010907.263125-1-djrscally@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org To ensure we handle situations in which multiple sensors of the same model (and therefore _HID) are present in a system, we need to be able to iterate over devices matching a known _HID but unknown _UID and _HRV - add acpi_dev_get_next_match_dev() to accommodate that possibility and change acpi_dev_get_first_match_dev() to simply call the new function with a NULL starting point. Add an iterator macro for convenience. Reviewed-by: Andy Shevchenko Reviewed-by: Sakari Ailus Suggested-by: Andy Shevchenko Signed-off-by: Daniel Scally --- Changes in v3 - prefixed referenced to the arguments with "@" in comment drivers/acpi/utils.c | 30 ++++++++++++++++++++++++++---- include/acpi/acpi_bus.h | 7 +++++++ 2 files changed, 33 insertions(+), 4 deletions(-) diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c index d5411a166685..ddca1550cce6 100644 --- a/drivers/acpi/utils.c +++ b/drivers/acpi/utils.c @@ -843,12 +843,13 @@ bool acpi_dev_present(const char *hid, const char *uid, s64 hrv) EXPORT_SYMBOL(acpi_dev_present); /** - * acpi_dev_get_first_match_dev - Return the first match of ACPI device + * acpi_dev_get_next_match_dev - Return the next match of ACPI device + * @adev: Pointer to the previous acpi_device matching this @hid, @uid and @hrv * @hid: Hardware ID of the device. * @uid: Unique ID of the device, pass NULL to not check _UID * @hrv: Hardware Revision of the device, pass -1 to not check _HRV * - * Return the first match of ACPI device if a matching device was present + * Return the next match of ACPI device if another matching device was present * at the moment of invocation, or NULL otherwise. * * The caller is responsible to call put_device() on the returned device. @@ -856,8 +857,9 @@ EXPORT_SYMBOL(acpi_dev_present); * See additional information in acpi_dev_present() as well. */ struct acpi_device * -acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv) +acpi_dev_get_next_match_dev(struct acpi_device *adev, const char *hid, const char *uid, s64 hrv) { + struct device *start = adev ? &adev->dev : NULL; struct acpi_dev_match_info match = {}; struct device *dev; @@ -865,9 +867,29 @@ acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv) match.uid = uid; match.hrv = hrv; - dev = bus_find_device(&acpi_bus_type, NULL, &match, acpi_dev_match_cb); + dev = bus_find_device(&acpi_bus_type, start, &match, acpi_dev_match_cb); return dev ? to_acpi_device(dev) : NULL; } +EXPORT_SYMBOL(acpi_dev_get_next_match_dev); + +/** + * acpi_dev_get_first_match_dev - Return the first match of ACPI device + * @hid: Hardware ID of the device. + * @uid: Unique ID of the device, pass NULL to not check _UID + * @hrv: Hardware Revision of the device, pass -1 to not check _HRV + * + * Return the first match of ACPI device if a matching device was present + * at the moment of invocation, or NULL otherwise. + * + * The caller is responsible to call put_device() on the returned device. + * + * See additional information in acpi_dev_present() as well. + */ +struct acpi_device * +acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv) +{ + return acpi_dev_get_next_match_dev(NULL, hid, uid, hrv); +} EXPORT_SYMBOL(acpi_dev_get_first_match_dev); /* diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index a3abcc4b7d9f..0a028ba967d3 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -688,9 +688,16 @@ static inline bool acpi_device_can_poweroff(struct acpi_device *adev) bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2); +struct acpi_device * +acpi_dev_get_next_match_dev(struct acpi_device *adev, const char *hid, const char *uid, s64 hrv); struct acpi_device * acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv); +#define for_each_acpi_dev_match(adev, hid, uid, hrv) \ + for (adev = acpi_dev_get_first_match_dev(hid, uid, hrv); \ + adev; \ + adev = acpi_dev_get_next_match_dev(adev, hid, uid, hrv)) + static inline void acpi_dev_put(struct acpi_device *adev) { put_device(&adev->dev);