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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 3F037C4708D for ; Fri, 28 May 2021 08:13:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 203C3613C9 for ; Fri, 28 May 2021 08:13:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236024AbhE1IOy (ORCPT ); Fri, 28 May 2021 04:14:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33000 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235958AbhE1IOt (ORCPT ); Fri, 28 May 2021 04:14:49 -0400 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 35D76C061574; Fri, 28 May 2021 01:13:14 -0700 (PDT) Received: by mail-pl1-x62d.google.com with SMTP id v13so1259528ple.9; Fri, 28 May 2021 01:13:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=21xAaUHWeHof2ecP/y/d30huoLiokvMxn5AYQcuGXfg=; b=YuNG0cSnJzP07WQH1cBbi/A+4+mjzR3qehA/1Mv7hmmSGLgeHWMmEu8F7RVgdM7qVx mprinDFWUuLOVsQyAnS74xwQNRJXdIS97S87KcynFgYCSKidRKtt7/JzlH4DYeVJfQMR cfYtRa5bCFUz0lNu3FclM9I9B1ogqM/H8ub9J9hrI7e8N2DN607JOOVLyK+ZaKznQR61 ehamUCFqbnOEKprduupYQSKLc/B74TYVdp+UkJzfbffvradmooQlXk2qDxWbefTGEwU5 kUm/cLT4uRP6AAsPkL0DWGdXf3Zlay5NsdAzTXJ5iQ775k5IMOJ4Tq5AqPfkvJdYRSCj fJ1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=21xAaUHWeHof2ecP/y/d30huoLiokvMxn5AYQcuGXfg=; b=M52JjSYzvsmnVgx3VtbOw4EJtbtpU1NW40IeBFy0Bg3Il0WT1FONPUb2IKcvR8lI8+ gRDS/dlSS0eJvJNQ7WiAIkJAztkZrDYssTFAghlsBn12nPWrBLgl5stGsk4caI/0eKRq 5YrHwJnluZMAhB5HEpg/SwlfOtMrzFz46F08V925dWSWZBsoYjCX2reY9mFZSOPu1qu6 Iz54tsziD39fxaz1Yz9+DQKek9qm06kcU8wu64pB7tpPNz1n320VWCq+3+SCcpOQ19U7 TWR9LT7Mcqtku6Djk6AOPb1EbvtMkHe1HRnQVyiG842bpzgOstHDkI4EuKFynnTZJQB9 ZIYw== X-Gm-Message-State: AOAM532xTsQI1knq0PphiJZTQZrqWPBttztZadZcSjuu5rAPPnSC3vBy JfvpnrMv2ptS8fF0ds4S3mw= X-Google-Smtp-Source: ABdhPJyyvweGFW8Eh8bd+eKcXVC2wzxMqNaQ8UYzWiDHmVDfiTCarncao5MD1si6ap7/KLnwBjFjtg== X-Received: by 2002:a17:902:d2c5:b029:f1:c207:b0fd with SMTP id n5-20020a170902d2c5b02900f1c207b0fdmr6965759plc.45.1622189593759; Fri, 28 May 2021 01:13:13 -0700 (PDT) Received: from localhost.localdomain ([2402:7500:46b:3194:b541:419e:4878:8a93]) by smtp.gmail.com with ESMTPSA id z18sm3846594pfc.23.2021.05.28.01.13.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 May 2021 01:13:13 -0700 (PDT) From: Gene Chen To: sre@kernel.org, matthias.bgg@gmail.com, matti.vaittinen@fi.rohmeurope.com Cc: broonie@kernel.org, robh+dt@kernel.org, devicetree@vger.kernel.org, inux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, rdunlap@infradead.org, gene_chen@richtek.com, Wilma.Wu@mediatek.com, shufan_lee@richtek.com, cy_huang@richtek.com, benjamin.chao@mediatek.com Subject: [PATCH v5 1/3] lib: add linear range get selector within Date: Fri, 28 May 2021 16:12:58 +0800 Message-Id: <20210528081300.64759-2-gene.chen.richtek@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210528081300.64759-1-gene.chen.richtek@gmail.com> References: <20210528081300.64759-1-gene.chen.richtek@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Gene Chen Add linear range get selector within for choose closest selector between minimum and maximum selector. Signed-off-by: Gene Chen --- include/linux/linear_range.h | 2 ++ lib/linear_ranges.c | 31 +++++++++++++++++++++++++++++++ 2 files changed, 33 insertions(+) diff --git a/include/linux/linear_range.h b/include/linux/linear_range.h index 17b5943727d5..fd3d0b358f22 100644 --- a/include/linux/linear_range.h +++ b/include/linux/linear_range.h @@ -41,6 +41,8 @@ int linear_range_get_selector_low(const struct linear_range *r, int linear_range_get_selector_high(const struct linear_range *r, unsigned int val, unsigned int *selector, bool *found); +void linear_range_get_selector_within(const struct linear_range *r, + unsigned int val, unsigned int *selector); int linear_range_get_selector_low_array(const struct linear_range *r, int ranges, unsigned int val, unsigned int *selector, bool *found); diff --git a/lib/linear_ranges.c b/lib/linear_ranges.c index ced5c15d3f04..a1a7dfa881de 100644 --- a/lib/linear_ranges.c +++ b/lib/linear_ranges.c @@ -241,5 +241,36 @@ int linear_range_get_selector_high(const struct linear_range *r, } EXPORT_SYMBOL_GPL(linear_range_get_selector_high); +/** + * linear_range_get_selector_within - return linear range selector for value + * @r: pointer to linear range where selector is looked from + * @val: value for which the selector is searched + * @selector: address where found selector value is updated + * + * Return selector for which range value is closest match for given + * input value. Value is matching if it is equal or lower than given + * value. But return maximum selector if given value is higher than + * maximum value. + */ +void linear_range_get_selector_within(const struct linear_range *r, + unsigned int val, unsigned int *selector) +{ + if (r->min > val) { + *selector = r->min_sel; + return; + } + + if (linear_range_get_max_value(r) < val) { + *selector = r->max_sel; + return; + } + + if (r->step == 0) + *selector = r->min_sel; + else + *selector = (val - r->min) / r->step + r->min_sel; +} +EXPORT_SYMBOL_GPL(linear_range_get_selector_within); + MODULE_DESCRIPTION("linear-ranges helper"); MODULE_LICENSE("GPL"); -- 2.25.1