From patchwork Wed Jul 16 03:01:28 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravana Kannan X-Patchwork-Id: 4564391 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id CAE109F3B4 for ; Wed, 16 Jul 2014 03:01:39 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0E2542018A for ; Wed, 16 Jul 2014 03:01:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 34558201BF for ; Wed, 16 Jul 2014 03:01:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758144AbaGPDBg (ORCPT ); Tue, 15 Jul 2014 23:01:36 -0400 Received: from smtp.codeaurora.org ([198.145.11.231]:35210 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752620AbaGPDBf (ORCPT ); Tue, 15 Jul 2014 23:01:35 -0400 Received: from smtp.codeaurora.org (localhost [127.0.0.1]) by smtp.codeaurora.org (Postfix) with ESMTP id 7DB521403E9; Wed, 16 Jul 2014 03:01:35 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 486) id 6B35A1403EE; Wed, 16 Jul 2014 03:01:35 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from skannan1-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: skannan@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id D82081403E9; Wed, 16 Jul 2014 03:01:34 +0000 (UTC) From: Saravana Kannan To: MyungJoo Ham , Kyungmin Park Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, "Saravana Kannan" Subject: [PATCH v3] PM / devfreq: Add possible_frequencies device attribute Date: Tue, 15 Jul 2014 20:01:28 -0700 Message-Id: <1405479688-13735-1-git-send-email-skannan@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <30733097.432311399543337408.JavaMail.weblogic@epv6ml09> X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Some devices use freq_table instead of OPP. For those devices, the available_frequencies sysfs file shows up empty. So, add a possible_frequencies attribute/syfs file that list all the possible frequencies. For devices that use OPP, the output of this file will match available_frequencies. It may change in the future to show all OPP frequencies -- even the disabled ones. Signed-off-by: Saravana Kannan --- drivers/devfreq/devfreq.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 9f90369..65eed38 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -994,6 +994,31 @@ static ssize_t available_frequencies_show(struct device *d, } static DEVICE_ATTR_RO(available_frequencies); +static ssize_t possible_frequencies_show(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct devfreq *df = to_devfreq(d); + unsigned int i = 0; + ssize_t count = 0; + + if (!df->profile->freq_table) + return available_frequencies_show(d, attr, buf); + + for (i = 0; i < df->profile->max_state; i++) + count += scnprintf(&buf[count], (PAGE_SIZE - count - 2), + "%u ", df->profile->freq_table[i]); + + /* Truncate the trailing space */ + if (count) + count--; + + count += sprintf(&buf[count], "\n"); + + return count; +} +static DEVICE_ATTR_RO(possible_frequencies); + static ssize_t trans_stat_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -1041,6 +1066,7 @@ static struct attribute *devfreq_attrs[] = { &dev_attr_available_governors.attr, &dev_attr_cur_freq.attr, &dev_attr_available_frequencies.attr, + &dev_attr_possible_frequencies.attr, &dev_attr_target_freq.attr, &dev_attr_polling_interval.attr, &dev_attr_min_freq.attr,