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=ham 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 F274AC3276C for ; Thu, 2 Jan 2020 22:37:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C85C621835 for ; Thu, 2 Jan 2020 22:37:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578004677; bh=paQpmdQsdw6LFgUXfXbP6a8cEOW5xD5LLnSEsbHO1Ms=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Lrey2O6jSEhV5bYXRj30L/oihFacHJJpRgjaG/75WgRDAPYB8DdqNq0N8hwXreLxQ VhERBluAgy+tlRV6XLRbh7M0dhzjrFnp2XLwg9f3AQhPPhDizkc/YFQTEp9q0kl6lO +BNqHOFYZYmHSaJNAg5ltbhHOVuNdE3S1lxxhdFE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731164AbgABWh4 (ORCPT ); Thu, 2 Jan 2020 17:37:56 -0500 Received: from mail.kernel.org ([198.145.29.99]:50988 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731148AbgABWhw (ORCPT ); Thu, 2 Jan 2020 17:37:52 -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 A4BF220866; Thu, 2 Jan 2020 22:37:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578004672; bh=paQpmdQsdw6LFgUXfXbP6a8cEOW5xD5LLnSEsbHO1Ms=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gtH7Q9RdVM5Hs/xk9M/ka9S1p4kw/26YP8IpHX3BEzQdseehevqRmTk0PichKCNvX MSfN7NqqRYFdGIXREFfFeQKUt2rMpW8y1Nmsf7GDI3hjD8Fn/JrekxSAjnq97l5+26 GgtesThF5flKDFFa97yGIJhIg8E06SzYvlY6z6V8= 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 4.4 104/137] clk: qcom: Allow constant ratio freq tables for rcg Date: Thu, 2 Jan 2020 23:07:57 +0100 Message-Id: <20200102220601.078765262@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200102220546.618583146@linuxfoundation.org> References: <20200102220546.618583146@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 b544bb302f79..350a01f74870 100644 --- a/drivers/clk/qcom/clk-rcg2.c +++ b/drivers/clk/qcom/clk-rcg2.c @@ -196,6 +196,8 @@ static int _freq_tbl_determine_rate(struct clk_hw *hw, p = clk_hw_get_parent_by_index(hw, index); if (clk_flags & CLK_SET_RATE_PARENT) { 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 8fa477293ae0..d2f26577f5c0 100644 --- a/drivers/clk/qcom/common.c +++ b/drivers/clk/qcom/common.c @@ -36,6 +36,9 @@ 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