From patchwork Thu Mar 20 12:10:58 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gautham R Shenoy X-Patchwork-Id: 3865511 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 312D99F382 for ; Thu, 20 Mar 2014 12:11:47 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4CE202024C for ; Thu, 20 Mar 2014 12:11:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6B48F20237 for ; Thu, 20 Mar 2014 12:11:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750960AbaCTMLp (ORCPT ); Thu, 20 Mar 2014 08:11:45 -0400 Received: from e23smtp08.au.ibm.com ([202.81.31.141]:44385 "EHLO e23smtp08.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757165AbaCTMLo (ORCPT ); Thu, 20 Mar 2014 08:11:44 -0400 Received: from /spool/local by e23smtp08.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Thu, 20 Mar 2014 22:11:40 +1000 Received: from d23relay03.au.ibm.com (d23relay03.au.ibm.com [9.190.235.21]) by d23dlp01.au.ibm.com (Postfix) with ESMTP id 436DF2CE8052 for ; Thu, 20 Mar 2014 23:11:10 +1100 (EST) Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay03.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id s2KCAuUS7143778 for ; Thu, 20 Mar 2014 23:10:56 +1100 Received: from d23av01.au.ibm.com (localhost [127.0.0.1]) by d23av01.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id s2KCB9oY004099 for ; Thu, 20 Mar 2014 23:11:10 +1100 Received: from sofia.in.ibm.com (sofia.in.ibm.com [9.124.35.168]) by d23av01.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id s2KCB2Mr003964; Thu, 20 Mar 2014 23:11:08 +1100 From: "Gautham R. Shenoy" To: linuxppc-dev@ozlabs.org, linux-pm@vger.kernel.org Cc: benh@kernel.crashing.org, svaidy@linux.vnet.ibm.com, "Gautham R. Shenoy" Subject: [PATCH v3 3/5] powernv:cpufreq: Create pstate_id_to_freq() helper Date: Thu, 20 Mar 2014 17:40:58 +0530 Message-Id: <1395317460-14811-4-git-send-email-ego@linux.vnet.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1395317460-14811-1-git-send-email-ego@linux.vnet.ibm.com> References: <1395317460-14811-1-git-send-email-ego@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14032012-5140-0000-0000-000004C03E83 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: "Gautham R. Shenoy" Create a helper routine that can return the cpu-frequency for the corresponding pstate_id. Also, cache the values of the pstate_max, pstate_min and pstate_nominal and nr_pstates in a static structure so that they can be reused in the future to perform any validations. Signed-off-by: Gautham R. Shenoy --- drivers/cpufreq/powernv-cpufreq.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/cpufreq/powernv-cpufreq.c b/drivers/cpufreq/powernv-cpufreq.c index 66dae0d..e7b0292 100644 --- a/drivers/cpufreq/powernv-cpufreq.c +++ b/drivers/cpufreq/powernv-cpufreq.c @@ -39,6 +39,14 @@ static DEFINE_PER_CPU(struct mutex, freq_switch_lock); static struct cpufreq_frequency_table powernv_freqs[POWERNV_MAX_PSTATES+1]; static int powernv_pstate_ids[POWERNV_MAX_PSTATES+1]; +struct powernv_pstate_info { + int pstate_min_id; + int pstate_max_id; + int pstate_nominal_id; + int nr_pstates; +}; +static struct powernv_pstate_info powernv_pstate_info; + /* * Initialize the freq table based on data obtained * from the firmware passed via device-tree @@ -112,9 +120,28 @@ static int init_powernv_pstates(void) for (i = 0; powernv_freqs[i].frequency != CPUFREQ_TABLE_END; i++) pr_debug("%d: %d\n", i, powernv_freqs[i].frequency); + powernv_pstate_info.pstate_min_id = pstate_min; + powernv_pstate_info.pstate_max_id = pstate_max; + powernv_pstate_info.pstate_nominal_id = pstate_nominal; + powernv_pstate_info.nr_pstates = nr_pstates; + return 0; } +/** + * Returns the cpu frequency corresponding to the pstate_id. + */ +static unsigned int pstate_id_to_freq(int pstate_id) +{ + int i; + + i = powernv_pstate_info.pstate_max_id - pstate_id; + + BUG_ON(i >= powernv_pstate_info.nr_pstates || i < 0); + WARN_ON(powernv_pstate_ids[i] != pstate_id); + return powernv_freqs[i].frequency; +} + static struct freq_attr *powernv_cpu_freq_attr[] = { &cpufreq_freq_attr_scaling_available_freqs, NULL,