From patchwork Sat Dec 30 01:12:58 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bryan O'Donoghue X-Patchwork-Id: 10137555 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 0E4B26037D for ; Sat, 30 Dec 2017 01:18:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F3AF42B551 for ; Sat, 30 Dec 2017 01:18:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E63862B55D; Sat, 30 Dec 2017 01:18:25 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 851322B551 for ; Sat, 30 Dec 2017 01:18:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751251AbdL3BSQ (ORCPT ); Fri, 29 Dec 2017 20:18:16 -0500 Received: from mail-wm0-f65.google.com ([74.125.82.65]:39317 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751137AbdL3BNb (ORCPT ); Fri, 29 Dec 2017 20:13:31 -0500 Received: by mail-wm0-f65.google.com with SMTP id i11so50090688wmf.4 for ; Fri, 29 Dec 2017 17:13:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nexus-software-ie.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=aH30kt7bAii44k8osrXspDgDNOquJixNuo9L9eBKb6k=; b=N0bm6dq36ei1F3NPuWVFLAPosRKvRji97cUuEzBb/wCJByBAPuJZkV8qh4klGyHZEj shV8AsNX+3M3+aowDwvT1Ar3gj3+zruQiPa/i5oeQ2FTjg2jaVOuhxsJVa7VY/pnvY/A vhTzoUsfVH4z5TYWwRbi5EfCTy2ua0GGW2gifrL2W3xCkIVuDaniHGAfFomh81eSF4+3 GM/fyU7CDdtRb08A6MFqJggFu0nWhuqfPpVid4J2ev0SbOfjlvJqstT+Q70EqD8kQjO7 TIEEGcHbDduf+XUGEovm5wsDe/MNOhuYKhjZ9P/xSdTg7MIY8hKyB+1OhqWfCuoFVJEZ Uk+Q== 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; bh=aH30kt7bAii44k8osrXspDgDNOquJixNuo9L9eBKb6k=; b=ERHmymyTS3nIjPFZH/PqIWlzNkWg2eRBCPJOlU0KSzQwfmQbOLWdEmfN71flVB6MWG lHyODwACX+YPJsBZ58b9mBmgkycNFg5kmUKNyRlpVfdBGny7a4g1mFN5uZXqTDmNIhhU ofFbl3/Q9H5+vBiX0XwcRcltal3xMDfKn3FBs/IK/RRk9h+pz/fdQwtvANs3yfQ3E4pz QeOJQvhD+9u1osphF/jHRaU/XR+Yu/V/2y6lJMtLWJnpAzf8A0/cDtN7RozbrBXAzZIA g4NxYOePXLD9wtxmzv7Tl7Isr+KL51MrHWek7DhLDWV+FAJ+i+9rIL682iBvJB7/1CsW kHEg== X-Gm-Message-State: AKGB3mJtoKY1cWQP7ElFL7SLb3jDw+vOKUos4DK4mdy3Ms8G4wMqD3se pmKoF5OFrHzwc7TsTwHZJ08JWg== X-Google-Smtp-Source: ACJfBotYe8QWqWj/4cy0FPbFOG6imCVmr8dD7KXDpjPE5wRFbyXnB58hk1nmofGnVAWULY4eghZAdw== X-Received: by 10.80.208.150 with SMTP id v22mr45885077edd.62.1514596410857; Fri, 29 Dec 2017 17:13:30 -0800 (PST) Received: from localhost.localdomain ([109.255.42.2]) by smtp.gmail.com with ESMTPSA id h4sm29818268edb.16.2017.12.29.17.13.30 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 29 Dec 2017 17:13:30 -0800 (PST) From: Bryan O'Donoghue To: mturquette@baylibre.com, sboyd@codeaurora.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org Cc: pure.logic@nexus-software.ie, Joachim Eastwood , linux-arm-kernel@lists.infradead.org Subject: [PATCH 19/33] clk: nxp: change lpc18xx_pll0_round_rate() return logic Date: Sat, 30 Dec 2017 01:12:58 +0000 Message-Id: <1514596392-22270-20-git-send-email-pure.logic@nexus-software.ie> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1514596392-22270-1-git-send-email-pure.logic@nexus-software.ie> References: <1514596392-22270-1-git-send-email-pure.logic@nexus-software.ie> Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch updates the round_rate() logic here to return zero instead of a negative number on error. In conjunction with higher-level changes associated with acting on the return value of clk_ops->round_rate() it is then possible to have clk_ops->round_rate() return values from 1 Hz to ULONG_MAX Hz instead of the current limitation of 1 Hz to LONG_MAX Hz. Signed-off-by: Bryan O'Donoghue Cc: Michael Turquette Cc: Stephen Boyd Cc: Joachim Eastwood Cc: linux-clk@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org --- drivers/clk/nxp/clk-lpc18xx-cgu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/clk/nxp/clk-lpc18xx-cgu.c b/drivers/clk/nxp/clk-lpc18xx-cgu.c index e08bad9..396d4f7 100644 --- a/drivers/clk/nxp/clk-lpc18xx-cgu.c +++ b/drivers/clk/nxp/clk-lpc18xx-cgu.c @@ -381,13 +381,13 @@ static unsigned long lpc18xx_pll0_round_rate(struct clk_hw *hw, if (*prate < rate) { pr_warn("%s: pll dividers not supported\n", __func__); - return -EINVAL; + return 0; } m = DIV_ROUND_UP_ULL(*prate, rate * 2); if (m <= 0 && m > LPC18XX_PLL0_MSEL_MAX) { pr_warn("%s: unable to support rate %lu\n", __func__, rate); - return -EINVAL; + return 0; } return 2 * *prate * m;