From patchwork Wed Jun 29 22:58:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: William McVicker X-Patchwork-Id: 12900791 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F302ECCA47C for ; Wed, 29 Jun 2022 23:00:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229460AbiF2XAC (ORCPT ); Wed, 29 Jun 2022 19:00:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43756 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231358AbiF2W7p (ORCPT ); Wed, 29 Jun 2022 18:59:45 -0400 Received: from mail-pg1-x549.google.com (mail-pg1-x549.google.com [IPv6:2607:f8b0:4864:20::549]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DA5C840E47 for ; Wed, 29 Jun 2022 15:58:51 -0700 (PDT) Received: by mail-pg1-x549.google.com with SMTP id 196-20020a6300cd000000b0040c9c64e7e4so8723993pga.9 for ; Wed, 29 Jun 2022 15:58:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=dWtWzcF9EWPJff15LpScH15OiRkVx8LFLsKeZfF4Vw0=; b=UWnG7cUEsRngB6+FpQTUwPtY9Fa3M+ATomWL5dGrpOXykhGGRzSBaCXjDQaUY4BrYW h/H4Br3KmDKglsXZPzpUEXfhjZTa7FiRY8piqh4zhPp/oou/IUKk3mx5UAnH26IjAKdd c+Xa8s6M1FROWeLXLlIM/slorgk9aROq6KqLnb9Z496zQA1DvS6wDYN2rFSwXOFo3B/D 4ob/c3m4KBJRAYYw47dExamOQUG6hyOpe8Sj+iyGLx2EyURd31oVQYuTRkvl24brbvG7 d82GerEUcdkV3m77tkk560ty73+vqzYk++v+i/529GVvtViEuHnULbvHKoiEKrwDP10B qYEg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=dWtWzcF9EWPJff15LpScH15OiRkVx8LFLsKeZfF4Vw0=; b=JaOVNLBV/ilg0K37+/JQvdeCRvpknRbqdKMtMZSsQjK4Lopl3GA04z3LzoZvMVhYIA a0Twhho+f/WZEmFrz8rX+TyfeP93bFkp3p5kKjb/gzAvaeAWf95XKAqqZ6HDcXZ0u4OL EWBjV6q+IK6Fq//GL3v9LMSSlGTMEE7EkgJhXn0MAazpI9uBRC/xNozY7glB8pLiGWyS xf1dUNG+WRbg9ei1LeC0gUSU5CE9Q9WimPmlcegUV6+JGPyhAYsSD+fFGQUIsWUnFyS5 uKUz4RD8LgJyOL/0fSJNJTjy86qG30T2XMpWe2XSEn1n7OSTgxyaUeA5ZQo8Re2GRUPP L1gw== X-Gm-Message-State: AJIora8aCxXwk69C/nC/KVKwBZEEs4x74u16YF3CT+pYVSmwZhIwEzFb OMMapKHpXmKHVxmMpq4+llFmb+f33m27hvw0Huc= X-Google-Smtp-Source: AGRyM1uLiis59SVfbCrONv+Ja9MRsl2c1ovETkCcknpE61KRbyIRoDv1ilv1BDthOXjvyc8q8yGx/OzrECY12zFh354= X-Received: from willmcvicker.c.googlers.com ([fda3:e722:ac3:cc00:24:72f4:c0a8:2dd0]) (user=willmcvicker job=sendgmr) by 2002:a17:902:d2c9:b0:16a:578f:c356 with SMTP id n9-20020a170902d2c900b0016a578fc356mr11245986plc.4.1656543531426; Wed, 29 Jun 2022 15:58:51 -0700 (PDT) Date: Wed, 29 Jun 2022 22:58:41 +0000 In-Reply-To: <20220629225843.332453-1-willmcvicker@google.com> Message-Id: <20220629225843.332453-2-willmcvicker@google.com> Mime-Version: 1.0 References: <20220629225843.332453-1-willmcvicker@google.com> X-Mailer: git-send-email 2.37.0.rc0.161.g10f37bed90-goog Subject: [PATCH 4.19 v1 1/2] hwmon: Introduce hwmon_device_register_for_thermal From: Will McVicker To: stable@vger.kernel.org, Jean Delvare , Guenter Roeck , Zhang Rui , Eduardo Valentin , Daniel Lezcano Cc: kernel-team@android.com, Will McVicker , linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, "Rafael J . Wysocki" Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org From: Guenter Roeck [ upstream commit e5d21072054fbadf41cd56062a3a14e447e8c22b ] The thermal subsystem registers a hwmon driver without providing chip or sysfs group information. This is for legacy reasons and would be difficult to change. At the same time, we want to enforce that chip information is provided when registering a hwmon device using hwmon_device_register_with_info(). To enable this, introduce a special API for use only by the thermal subsystem. Acked-by: Rafael J . Wysocki Signed-off-by: Guenter Roeck --- drivers/hwmon/hwmon.c | 25 +++++++++++++++++++++++++ include/linux/hwmon.h | 3 +++ 2 files changed, 28 insertions(+) diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c index c4051a3e63c2..412a5e39fc14 100644 --- a/drivers/hwmon/hwmon.c +++ b/drivers/hwmon/hwmon.c @@ -725,6 +725,31 @@ hwmon_device_register_with_info(struct device *dev, const char *name, } EXPORT_SYMBOL_GPL(hwmon_device_register_with_info); +/** + * hwmon_device_register_for_thermal - register hwmon device for thermal subsystem + * @dev: the parent device + * @name: hwmon name attribute + * @drvdata: driver data to attach to created device + * + * The use of this function is restricted. It is provided for legacy reasons + * and must only be called from the thermal subsystem. + * + * hwmon_device_unregister() must be called when the device is no + * longer needed. + * + * Returns the pointer to the new device. + */ +struct device * +hwmon_device_register_for_thermal(struct device *dev, const char *name, + void *drvdata) +{ + if (!name || !dev) + return ERR_PTR(-EINVAL); + + return __hwmon_device_register(dev, name, drvdata, NULL, NULL); +} +EXPORT_SYMBOL_GPL(hwmon_device_register_for_thermal); + /** * hwmon_device_register - register w/ hwmon * @dev: the device to register diff --git a/include/linux/hwmon.h b/include/linux/hwmon.h index 8fde789f2eff..5ff3db6eb9f1 100644 --- a/include/linux/hwmon.h +++ b/include/linux/hwmon.h @@ -390,6 +390,9 @@ hwmon_device_register_with_info(struct device *dev, const struct hwmon_chip_info *info, const struct attribute_group **extra_groups); struct device * +hwmon_device_register_for_thermal(struct device *dev, const char *name, + void *drvdata); +struct device * devm_hwmon_device_register_with_info(struct device *dev, const char *name, void *drvdata, const struct hwmon_chip_info *info,