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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 16833C3276E for ; Thu, 2 Jan 2020 22:13:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DD8B221D7D for ; Thu, 2 Jan 2020 22:13:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578003181; bh=M1INnmvi6CyD/5trDJ/64YwMokmDPaZtmBLG5tNuIEo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=NygIR/fIg+a9LcvEkbQaCwqHYelSOmzPO2IuCndBPS+vb/fPSnTwlragAUTVSWQmq M+1iyB37M6etPA0u3YHrRHSjZ4CfOQRGH74Gzprnld24wNV2HqI2T+MF/tZ9haKjzL r993x1sxGdVDkN/QrxixYvWb6JiHj8x0s2c53P6g= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727598AbgABWNB (ORCPT ); Thu, 2 Jan 2020 17:13:01 -0500 Received: from mail.kernel.org ([198.145.29.99]:52404 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727577AbgABWMz (ORCPT ); Thu, 2 Jan 2020 17:12:55 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8BF3821D7D; Thu, 2 Jan 2020 22:12:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578003175; bh=M1INnmvi6CyD/5trDJ/64YwMokmDPaZtmBLG5tNuIEo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ciQOCeUXZlTn8XLLqW+B4e+nYqqTfg+Aot/e5ZUxgB5tJa3xQU749FukD/KSA09Hq YjZirxCozJKXyIQ1AYfBJus1d1OvmID8H81EAN+NDT6EkqAJOu5l+Ey4l6elRAz6tv Z0xszIjSHg/pW8X+qpGQp6elaRotzBQfOQ3G9Gpk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Stephen Boyd , Jeffrey Hugo , Sasha Levin Subject: [PATCH 5.4 050/191] clk: qcom: Allow constant ratio freq tables for rcg Date: Thu, 2 Jan 2020 23:05:32 +0100 Message-Id: <20200102215835.264953897@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200102215829.911231638@linuxfoundation.org> References: <20200102215829.911231638@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jeffrey Hugo [ Upstream commit efd164b5520afd6fb2883b68e0d408a7de29c491 ] Some RCGs (the gfx_3d_src_clk in msm8998 for example) are basically just some constant ratio from the input across the entire frequency range. It would be great if we could specify the frequency table as a single entry constant ratio instead of a long list, ie: { .src = P_GPUPLL0_OUT_EVEN, .pre_div = 3 }, { } So, lets support that. We need to fix a corner case in qcom_find_freq() where if the freq table is non-null, but has no frequencies, we end up returning an "entry" before the table array, which is bad. Then, we need ignore the freq from the table, and instead base everything on the requested freq. Suggested-by: Stephen Boyd Signed-off-by: Jeffrey Hugo Link: https://lkml.kernel.org/r/20191031185715.15504-1-jeffrey.l.hugo@gmail.com Signed-off-by: Stephen Boyd Signed-off-by: Sasha Levin --- drivers/clk/qcom/clk-rcg2.c | 2 ++ drivers/clk/qcom/common.c | 3 +++ 2 files changed, 5 insertions(+) diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c index b98b81ef43a1..5a89ed88cc27 100644 --- a/drivers/clk/qcom/clk-rcg2.c +++ b/drivers/clk/qcom/clk-rcg2.c @@ -220,6 +220,8 @@ static int _freq_tbl_determine_rate(struct clk_hw *hw, const struct freq_tbl *f, if (clk_flags & CLK_SET_RATE_PARENT) { rate = f->freq; if (f->pre_div) { + if (!rate) + rate = req->rate; rate /= 2; rate *= f->pre_div + 1; } diff --git a/drivers/clk/qcom/common.c b/drivers/clk/qcom/common.c index 28ddc747d703..bdeacebbf0e4 100644 --- a/drivers/clk/qcom/common.c +++ b/drivers/clk/qcom/common.c @@ -29,6 +29,9 @@ struct freq_tbl *qcom_find_freq(const struct freq_tbl *f, unsigned long rate) if (!f) return NULL; + if (!f->freq) + return f; + for (; f->freq; f++) if (rate <= f->freq) return f; -- 2.20.1