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=-8.8 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=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 BB989C46475 for ; Tue, 23 Oct 2018 15:51:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 84B7420652 for ; Tue, 23 Oct 2018 15:51:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amarulasolutions.com header.i=@amarulasolutions.com header.b="FJGkYYgE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 84B7420652 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-clk-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728425AbeJXAPE (ORCPT ); Tue, 23 Oct 2018 20:15:04 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:45049 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727730AbeJXAPE (ORCPT ); Tue, 23 Oct 2018 20:15:04 -0400 Received: by mail-pf1-f194.google.com with SMTP id r9-v6so874333pff.11 for ; Tue, 23 Oct 2018 08:51:07 -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=1dyYdq2fGSrjONwrfY1SgFShhS+wEyBSRnppCGelZow=; b=FJGkYYgEP/eg/Wr9wbD7Fpq7rUFEazM/71HFrAqr/wVVs2hBXeyKynWEANE0N8bpBb jESZbeS8b406nfCpXeKdN6n0gjqx9WOvR7+fTrFJSTmV3w7TQ/LUXfVKnVpcwF+/PJZq Kfrr+u3rxntZwCx3QkK9EfmSyxpK1ORX3hTGU= 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=1dyYdq2fGSrjONwrfY1SgFShhS+wEyBSRnppCGelZow=; b=U2vR6iVruX4WGwEEMSXbE6tuzuyV43YCzgO0bSoOeY8NcCKtEhsI3Y8EP/amH+g/bZ y/i+kh/gr13K6OtMWH0JfBrR1C2lvkVIiu00fxsaOr+8nitCAEDlxgALCUlaJu2niqHv koiXPPp7Y6EU2ZDDXAYfZDrtZFwXEGnmHVKKxNEmIbXVnkW+K5Zp/Sh80e4pq14zMD8S p6gsuh1oXXrrSb5ewUL4IlYwUSNopEJxOLSdA8kOSN6UPnWyUgR/9J9B5kAp4hP4YvAE 6HPfBHNMVlC364xde3dPKOiyE1Rm8VJNBMsh2UDg9KZyyWROF8t0FDKVXgU0CaYmIBOn 6lEA== X-Gm-Message-State: ABuFfohc9cRLBJIQPeez/9qtW1To8xxjUhLhyYt5coLT2HjAV+36jx5x qMjgx6u6KrCby8g2nI5DcNBtEA== X-Google-Smtp-Source: ACcGV620rT4+klZBrl+72/MNbWP4Se0rx+vcw5DlyWGAQuwiKF6qJhGwL+yyA7oArbyCYbID4TVn7A== X-Received: by 2002:a63:1e5c:: with SMTP id p28-v6mr47910535pgm.376.1540309867407; Tue, 23 Oct 2018 08:51:07 -0700 (PDT) Received: from localhost.localdomain ([27.7.51.1]) by smtp.gmail.com with ESMTPSA id o75-v6sm7442829pfg.0.2018.10.23.08.51.00 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 23 Oct 2018 08:51:06 -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 v2 02/15] clk: sunxi-ng: Add check for minimal rate to NKM PLLs Date: Tue, 23 Oct 2018 21:20:22 +0530 Message-Id: <20181023155035.9101-3-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.18.0.321.gffc6fa0e3 In-Reply-To: <20181023155035.9101-1-jagan@amarulasolutions.com> References: <20181023155035.9101-1-jagan@amarulasolutions.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org Some NKM PLLs doesn't work well when their output clock rate is set below certain rate. So, add support for minimal rate for relevant PLLs. Signed-off-by: Jagan Teki --- Changes for v2: - new patch 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 841840e35e61..d17539dc88dd 100644 --- a/drivers/clk/sunxi-ng/ccu_nkm.c +++ b/drivers/clk/sunxi-ng/ccu_nkm.c @@ -125,6 +125,13 @@ static unsigned long ccu_nkm_round_rate(struct ccu_mux_internal *mux, if (nkm->common.features & CCU_FEATURE_FIXED_POSTDIV) rate *= nkm->fixed_post_div; + if (rate < nkm->min_rate) { + rate = nkm->min_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 cc6efb70a102..ff5bd00f429f 100644 --- a/drivers/clk/sunxi-ng/ccu_nkm.h +++ b/drivers/clk/sunxi-ng/ccu_nkm.h @@ -35,6 +35,7 @@ struct ccu_nkm { struct ccu_mux_internal mux; unsigned int fixed_post_div; + unsigned int min_rate; struct ccu_common common; }; -- 2.18.0.321.gffc6fa0e3