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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 5275EC3B19F for ; Fri, 14 Feb 2020 15:51:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2B7E32468D for ; Fri, 14 Feb 2020 15:51:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581695516; bh=LUMQ4dfbhY9whkPxnaGYGSz/mst3o4nhse0JeJl/eyc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=WmnP2vWetjsJjWcaPwHgzAHT9l5D8Ox0hH820F/EhOT6naqm6vAckkwvoUYCyWRuF z6CQNvXvk5AlsfKnHK0y+zRgFfz7ayuanSV6oN7P+RpTAEYFjS6L++tmKcsMxCYctg /FC2iXtBwGT/YEOL5zP4XPeHg9RW9+mgLNqjIPkU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730900AbgBNPvz (ORCPT ); Fri, 14 Feb 2020 10:51:55 -0500 Received: from mail.kernel.org ([198.145.29.99]:56848 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730843AbgBNPvn (ORCPT ); Fri, 14 Feb 2020 10:51:43 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D7AEB2467E; Fri, 14 Feb 2020 15:51:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581695502; bh=LUMQ4dfbhY9whkPxnaGYGSz/mst3o4nhse0JeJl/eyc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=krkUnuZyd0c5sd/p3qINKvcQnHHFeHUcyZZJ9FkEnckgfXmkVS4nPdeUslAViDjdG BnHg6snwQMaoLaRSxCVg16AnzqbP4hhMT8+v9ml8/XEGiE3wr0+hzbcK1SU6SJiDlW 6WMIR3rrdv0+m5p+vhPsOMQeNKNnGJEB0sF9zBgM= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Stephen Boyd , Rajendra Nayak , Sasha Levin , linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org Subject: [PATCH AUTOSEL 5.5 129/542] clk: qcom: Don't overwrite 'cfg' in clk_rcg2_dfs_populate_freq() Date: Fri, 14 Feb 2020 10:42:01 -0500 Message-Id: <20200214154854.6746-129-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200214154854.6746-1-sashal@kernel.org> References: <20200214154854.6746-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Stephen Boyd [ Upstream commit 21e157c62eeded8b1558a991b4820b761d48a730 ] The DFS frequency table logic overwrites 'cfg' while detecting the parent clk and then later on in clk_rcg2_dfs_populate_freq() we use that same variable to figure out the mode of the clk, either MND or not. Add a new variable to hold the parent clk bit so that 'cfg' is left untouched for use later. This fixes problems in detecting the supported frequencies for any clks in DFS mode. Fixes: cc4f6944d0e3 ("clk: qcom: Add support for RCG to register for DFS") Reported-by: Rajendra Nayak Signed-off-by: Stephen Boyd Link: https://lkml.kernel.org/r/20200128193329.45635-1-sboyd@kernel.org Tested-by: Rajendra Nayak Signed-off-by: Sasha Levin --- drivers/clk/qcom/clk-rcg2.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c index 8f4b9bec29565..5e0f7d8f168dd 100644 --- a/drivers/clk/qcom/clk-rcg2.c +++ b/drivers/clk/qcom/clk-rcg2.c @@ -952,7 +952,7 @@ static void clk_rcg2_dfs_populate_freq(struct clk_hw *hw, unsigned int l, struct clk_rcg2 *rcg = to_clk_rcg2(hw); struct clk_hw *p; unsigned long prate = 0; - u32 val, mask, cfg, mode; + u32 val, mask, cfg, mode, src; int i, num_parents; regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + SE_PERF_DFSR(l), &cfg); @@ -962,12 +962,12 @@ static void clk_rcg2_dfs_populate_freq(struct clk_hw *hw, unsigned int l, if (cfg & mask) f->pre_div = cfg & mask; - cfg &= CFG_SRC_SEL_MASK; - cfg >>= CFG_SRC_SEL_SHIFT; + src = cfg & CFG_SRC_SEL_MASK; + src >>= CFG_SRC_SEL_SHIFT; num_parents = clk_hw_get_num_parents(hw); for (i = 0; i < num_parents; i++) { - if (cfg == rcg->parent_map[i].cfg) { + if (src == rcg->parent_map[i].cfg) { f->src = rcg->parent_map[i].src; p = clk_hw_get_parent_by_index(&rcg->clkr.hw, i); prate = clk_hw_get_rate(p); -- 2.20.1