From patchwork Fri Apr 15 05:59:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?UmV4LUJDIENoZW4gKOmZs+afj+i+sCk=?= X-Patchwork-Id: 562127 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 4F4B8C43217 for ; Fri, 15 Apr 2022 05:59:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350200AbiDOGB6 (ORCPT ); Fri, 15 Apr 2022 02:01:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48682 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350186AbiDOGB5 (ORCPT ); Fri, 15 Apr 2022 02:01:57 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6985DB841; Thu, 14 Apr 2022 22:59:28 -0700 (PDT) X-UUID: 4b6099c3fbdc435d8ff3823da6f31ccb-20220415 X-UUID: 4b6099c3fbdc435d8ff3823da6f31ccb-20220415 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1227985327; Fri, 15 Apr 2022 13:59:20 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 15 Apr 2022 13:59:18 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 15 Apr 2022 13:59:18 +0800 From: Rex-BC Chen To: , , , , CC: , , , , , , , , , , , "Andrew-sh . Cheng" , Rex-BC Chen Subject: [PATCH V3 04/15] cpufreq: mediatek: Record previous target vproc value Date: Fri, 15 Apr 2022 13:59:05 +0800 Message-ID: <20220415055916.28350-5-rex-bc.chen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220415055916.28350-1-rex-bc.chen@mediatek.com> References: <20220415055916.28350-1-rex-bc.chen@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Jia-Wei Chang We found the buck voltage may not be exactly the same with what we set because CPU may share the same buck with other module. Therefore, we need to record the previous desired value instead of reading it from regulators. Signed-off-by: Andrew-sh.Cheng Signed-off-by: Jia-Wei Chang Signed-off-by: Rex-BC Chen --- drivers/cpufreq/mediatek-cpufreq.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/drivers/cpufreq/mediatek-cpufreq.c b/drivers/cpufreq/mediatek-cpufreq.c index ff27f77e8ee6..fa8b193bf27b 100644 --- a/drivers/cpufreq/mediatek-cpufreq.c +++ b/drivers/cpufreq/mediatek-cpufreq.c @@ -40,6 +40,7 @@ struct mtk_cpu_dvfs_info { struct list_head list_head; int intermediate_voltage; bool need_voltage_tracking; + int pre_vproc; }; static LIST_HEAD(dvfs_info_list); @@ -191,11 +192,17 @@ static int mtk_cpufreq_voltage_tracking(struct mtk_cpu_dvfs_info *info, static int mtk_cpufreq_set_voltage(struct mtk_cpu_dvfs_info *info, int vproc) { + int ret; + if (info->need_voltage_tracking) - return mtk_cpufreq_voltage_tracking(info, vproc); + ret = mtk_cpufreq_voltage_tracking(info, vproc); else - return regulator_set_voltage(info->proc_reg, vproc, - vproc + VOLT_TOL); + ret = regulator_set_voltage(info->proc_reg, vproc, + MAX_VOLT_LIMIT); + if (!ret) + info->pre_vproc = vproc; + + return ret; } static int mtk_cpufreq_set_target(struct cpufreq_policy *policy, @@ -213,7 +220,9 @@ static int mtk_cpufreq_set_target(struct cpufreq_policy *policy, inter_vproc = info->intermediate_voltage; pre_freq_hz = clk_get_rate(cpu_clk); - pre_vproc = regulator_get_voltage(info->proc_reg); + pre_vproc = info->pre_vproc; + if (pre_vproc <= 0) + pre_vproc = regulator_get_voltage(info->proc_reg); if (pre_vproc < 0) { dev_err(cpu_dev, "invalid Vproc value: %d\n", pre_vproc); return pre_vproc;