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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 4DCE1C35247 for ; Mon, 3 Feb 2020 16:37:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 205AD2051A for ; Mon, 3 Feb 2020 16:37:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580747862; bh=arkCkF1UEbJgqIxSxjBDGOgeiZF1m899vWxR5mhEmjs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=fhKXe3I2AAuz+KHe4CJgy6cpRIUGCpOPuKsgoqCWh2AZK5S9F6LRWpLUxiad/Ekqy nfUICwEXIanXbR2bVSOt5NPI839aQaGZNZx63JVwwNoalq2DkVQOstvrKJFPFHJmrY 5koknHVzXwNoLb9WXC6jN11H93fhAo4sBYsXCqmU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731107AbgBCQhl (ORCPT ); Mon, 3 Feb 2020 11:37:41 -0500 Received: from mail.kernel.org ([198.145.29.99]:53260 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731362AbgBCQhj (ORCPT ); Mon, 3 Feb 2020 11:37:39 -0500 Received: from localhost (unknown [104.132.45.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5CF652087E; Mon, 3 Feb 2020 16:37:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580747858; bh=arkCkF1UEbJgqIxSxjBDGOgeiZF1m899vWxR5mhEmjs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=B+U5i5fo9EU+UQ7/L5eJIi8WiTj67/q4K2rbp4ApQEwIC2CN6zPda0SzQjfgEHSR2 tKsCcLkZGcFOoecE+vgagYb22U2o/xz5NR3VCxZfHgC8b/xf4uHw3mkW59wITU7bT0 OGCGEWGfYYTWOS41cMkEfVgPB8kqbSfGdCFF+mL8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Chanwoo Choi Subject: [PATCH 5.5 10/23] PM / devfreq: Add new name attribute for sysfs Date: Mon, 3 Feb 2020 16:20:30 +0000 Message-Id: <20200203161904.709880157@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200203161902.288335885@linuxfoundation.org> References: <20200203161902.288335885@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Chanwoo Choi commit 2fee1a7cc6b1ce6634bb0f025be2c94a58dfa34d upstream. The commit 4585fbcb5331 ("PM / devfreq: Modify the device name as devfreq(X) for sysfs") changed the node name to devfreq(x). After this commit, it is not possible to get the device name through /sys/class/devfreq/devfreq(X)/*. Add new name attribute in order to get device name. Cc: stable@vger.kernel.org Fixes: 4585fbcb5331 ("PM / devfreq: Modify the device name as devfreq(X) for sysfs") Signed-off-by: Chanwoo Choi Signed-off-by: Greg Kroah-Hartman --- Documentation/ABI/testing/sysfs-class-devfreq | 7 +++++++ drivers/devfreq/devfreq.c | 9 +++++++++ 2 files changed, 16 insertions(+) --- a/Documentation/ABI/testing/sysfs-class-devfreq +++ b/Documentation/ABI/testing/sysfs-class-devfreq @@ -7,6 +7,13 @@ Description: The name of devfreq object denoted as ... is same as the name of device using devfreq. +What: /sys/class/devfreq/.../name +Date: November 2019 +Contact: Chanwoo Choi +Description: + The /sys/class/devfreq/.../name shows the name of device + of the corresponding devfreq object. + What: /sys/class/devfreq/.../governor Date: September 2011 Contact: MyungJoo Ham --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -1259,6 +1259,14 @@ err_out: } EXPORT_SYMBOL(devfreq_remove_governor); +static ssize_t name_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct devfreq *devfreq = to_devfreq(dev); + return sprintf(buf, "%s\n", dev_name(devfreq->dev.parent)); +} +static DEVICE_ATTR_RO(name); + static ssize_t governor_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -1592,6 +1600,7 @@ static ssize_t trans_stat_show(struct de static DEVICE_ATTR_RO(trans_stat); static struct attribute *devfreq_attrs[] = { + &dev_attr_name.attr, &dev_attr_governor.attr, &dev_attr_available_governors.attr, &dev_attr_cur_freq.attr,