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=-8.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,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 58FE9ECDE46 for ; Fri, 26 Oct 2018 14:44:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 20CDA20651 for ; Fri, 26 Oct 2018 14:44:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amarulasolutions.com header.i=@amarulasolutions.com header.b="nGIIzA9s" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 20CDA20651 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=amarulasolutions.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727848AbeJZXVu (ORCPT ); Fri, 26 Oct 2018 19:21:50 -0400 Received: from mail-pg1-f195.google.com ([209.85.215.195]:38506 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727608AbeJZXVu (ORCPT ); Fri, 26 Oct 2018 19:21:50 -0400 Received: by mail-pg1-f195.google.com with SMTP id f8-v6so644060pgq.5 for ; Fri, 26 Oct 2018 07:44:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amarulasolutions.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=LCfUU8SpHfEmAPHXqEtW+VtRBKPuExRqicCDj8q29y4=; b=nGIIzA9sUH3xhRTgytGk06e1T3qPtjrDwlKet6b3HqKEojx405qjqESehx1x4TqgHP G9gA3JalkS1tteEFAerR3AtMoRInyOlLRy1cPYF/iQINgLIYVRBOd/fYsUdt9yEqUFAY YgrxT1V8RmNHl8eu4ioOgMJz7EiMkyWdkFXJM= 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=LCfUU8SpHfEmAPHXqEtW+VtRBKPuExRqicCDj8q29y4=; b=VJt5WLOrhPKYEe8Aaznu8pDop5MCMhWn1J9AR7ohED7/5OuFv9uzJQryO1qaxjq/G7 4xYtnz0PhSscW/v7tlzL6rFUi7i32lw6JuI/9Y4za8/PgaULK4OAaMtYxu86EueDtDrb zyw9qw8Y7rknJ/aMsg2URo/Vsp8tM2wJyuI1B9SKZ/5DFF6x5NE2S+dD/6L3Q0QvCgxt fpwe48YiL4bRM9cFlRLYD57HaBovwYNl41jHR5/cp1Zjo5MA8foDuiQX1lLk97dmU6KJ 8vE5DY+EDF1FNawAUwoBl/BimKZYVgY+bUZN2EzzQv18nmjPTr7dnR5xLrbraInMRorR TDOA== X-Gm-Message-State: AGRZ1gIATyk8WxQaPD4jTU3Y+4UAo0zA2xbxt7h8uD2hSzSmu4aA+ch4 o+9q7ZlCfiU9s14dLHXVc7kv9g== X-Google-Smtp-Source: AJdET5dCkTKMuBJG5eIyIgbSBBwJuaDl+Rpv9ClSqBLosTZXn8tzu1DRJ9schG34dsVFgG3vek45Iw== X-Received: by 2002:a63:ce56:: with SMTP id r22-v6mr3698001pgi.217.1540565069444; Fri, 26 Oct 2018 07:44:29 -0700 (PDT) Received: from localhost.localdomain ([27.7.51.1]) by smtp.gmail.com with ESMTPSA id z22-v6sm12044467pgv.24.2018.10.26.07.44.24 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 26 Oct 2018 07:44:28 -0700 (PDT) From: Jagan Teki To: Maxime Ripard , Chen-Yu Tsai , Icenowy Zheng , Jernej Skrabec , Vasily Khoruzhick , Rob Herring , Mark Rutland , Catalin Marinas , Will Deacon , David Airlie , dri-devel@lists.freedesktop.org, Michael Turquette , Stephen Boyd , linux-clk@vger.kernel.org, Michael Trimarchi , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com Cc: Jagan Teki Subject: [PATCH v3 03/25] clk: sunxi-ng: Add check for maximum rate to NKM PLLs Date: Fri, 26 Oct 2018 20:13:22 +0530 Message-Id: <20181026144344.27778-4-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.18.0.321.gffc6fa0e3 In-Reply-To: <20181026144344.27778-1-jagan@amarulasolutions.com> References: <20181026144344.27778-1-jagan@amarulasolutions.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some NKM PLLs, frequency can be set above PLL working range. Add a constraint for maximum supported rate. This way, drivers can specify which is maximum allowed rate for PLL. Signed-off-by: Jagan Teki Acked-by: Stephen Boyd Tested-by: Jagan Teki --- Changes for v3: - collect Stephen Ack - add tested credit Changes for v2: - none drivers/clk/sunxi-ng/ccu_nkm.c | 7 +++++++ drivers/clk/sunxi-ng/ccu_nkm.h | 1 + 2 files changed, 8 insertions(+) diff --git a/drivers/clk/sunxi-ng/ccu_nkm.c b/drivers/clk/sunxi-ng/ccu_nkm.c index d17539dc88dd..574fd2cd2a79 100644 --- a/drivers/clk/sunxi-ng/ccu_nkm.c +++ b/drivers/clk/sunxi-ng/ccu_nkm.c @@ -132,6 +132,13 @@ static unsigned long ccu_nkm_round_rate(struct ccu_mux_internal *mux, return rate; } + if (nkm->max_rate && rate > nkm->max_rate) { + rate = nkm->max_rate; + if (nkm->common.features & CCU_FEATURE_FIXED_POSTDIV) + rate /= nkm->fixed_post_div; + return rate; + } + ccu_nkm_find_best(*parent_rate, rate, &_nkm); rate = *parent_rate * _nkm.n * _nkm.k / _nkm.m; diff --git a/drivers/clk/sunxi-ng/ccu_nkm.h b/drivers/clk/sunxi-ng/ccu_nkm.h index ff5bd00f429f..c82590481188 100644 --- a/drivers/clk/sunxi-ng/ccu_nkm.h +++ b/drivers/clk/sunxi-ng/ccu_nkm.h @@ -36,6 +36,7 @@ struct ccu_nkm { unsigned int fixed_post_div; unsigned int min_rate; + unsigned int max_rate; struct ccu_common common; }; -- 2.18.0.321.gffc6fa0e3