From patchwork Mon Jan 1 19:34:41 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bryan O'Donoghue X-Patchwork-Id: 10139375 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 74FDF60362 for ; Mon, 1 Jan 2018 19:39:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6753F285C9 for ; Mon, 1 Jan 2018 19:39:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5C411285E6; Mon, 1 Jan 2018 19:39:44 +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 DCC80285C9 for ; Mon, 1 Jan 2018 19:39:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753016AbeAATfE (ORCPT ); Mon, 1 Jan 2018 14:35:04 -0500 Received: from mail-wm0-f65.google.com ([74.125.82.65]:45482 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753002AbeAATfD (ORCPT ); Mon, 1 Jan 2018 14:35:03 -0500 Received: by mail-wm0-f65.google.com with SMTP id 9so58258525wme.4 for ; Mon, 01 Jan 2018 11:35:03 -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; bh=/Ew1e2Y3RRnLbMCn65IP31g+cr1NpCGL7wwcmcWXxkc=; b=GFPMOSYnvE7JoIDhkaUHxRv5wLTgLHNfEQcTh2RfukwHUXPzoZMoTSKzYJ7NgtNZYE 4LI+A+czjj47kK0XEapNx2R7ZF2VJztRCfP+lvxJZLM3doZhzcHI6fL9TYi7kcwhpPI2 dIgMvjq35WvOZUfGhIjIC8MwgbKt2NCje+othiTUYMaYivRXJTpKHh5b9Z8P4A/HSzus erAeN8CkLgFkMXXQeH5MjXn6NcauHcYLpOaBDVq+Ym3GMk9QiuFS8eNiQys1LAxjmH2l 3IUhIbIN3fijUdWmj25HxjqHzl0dCaYgklUaDcwmn3RCaeBC89CE4uhKKyTB8ImNOcOU UM6Q== 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; bh=/Ew1e2Y3RRnLbMCn65IP31g+cr1NpCGL7wwcmcWXxkc=; b=p7yiFZShjWS+IBAHBJqc0O6rGJeQ0dXZqzMILkA2RMXhs1wWjspUOL9nMWU/1evrLM zFmvXNQDhhKqMrCKiUgOBm3jlABDJRx3wZTXBHv3I2hASIosToWLoJVDOrjSdocvM4B6 H7rBR7O1Jvt27wdZi3oS7vRCMWNWWUei4OREBbKkounYYDxIftvfnmQrsCH7xzhIxZhI OkxDZiRkt3YY3hW/sug+rhP1u9ShCDPlFDVbNB+6nDoRydRbe/EmRw1gjvSym+WA0c/2 AjWMGygbHf2kZKm7Nqx/g6azhZ+viEy/iFHJlh6wWMRF0joSv1oaNI8hmLsLZG7gF2Wb QNAw== X-Gm-Message-State: AKGB3mKcA87zxkfHxTFRe2gqg6TpJ7S4VZuRQXQTNaBrw/p5HSajGtwX YwwqEX7m4sGGEBt1HTiKe2mXIQ== X-Google-Smtp-Source: ACJfBouSBMqEb1xQ/Jhwrwjtb08kNIWj6APMzU0Wa37uWjylqlFr/Y7XWGvkCMDx8uDJaAeWhePMmA== X-Received: by 10.80.244.194 with SMTP id v2mr59305978edm.68.1514835302633; Mon, 01 Jan 2018 11:35:02 -0800 (PST) Received: from localhost.localdomain (D4CCACC7.cm-2.dynamic.ziggo.nl. [212.204.172.199]) by smtp.gmail.com with ESMTPSA id r8sm29086992edm.22.2018.01.01.11.35.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 01 Jan 2018 11:35:02 -0800 (PST) From: Bryan O'Donoghue To: mturquette@baylibre.com, sboyd@codeaurora.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org Cc: Bryan O'Donoghue , Marek Vasut , Vladimir Barinov , Alexey Firago Subject: [PATCH v2 15/34] clk: vc5: change vc5_dbl_round_rate() return logic Date: Mon, 1 Jan 2018 19:34:41 +0000 Message-Id: <1514835300-381-1-git-send-email-pure.logic@nexus-software.ie> X-Mailer: git-send-email 2.7.4 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: Marek Vasut Cc: Michael Turquette Cc: Stephen Boyd Cc: linux-clk@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Vladimir Barinov Cc: Alexey Firago --- drivers/clk/clk-versaclock5.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clk/clk-versaclock5.c b/drivers/clk/clk-versaclock5.c index 9432122..733b402 100644 --- a/drivers/clk/clk-versaclock5.c +++ b/drivers/clk/clk-versaclock5.c @@ -294,7 +294,7 @@ static unsigned long vc5_dbl_round_rate(struct clk_hw *hw, unsigned long rate, if ((*parent_rate == rate) || ((*parent_rate * 2) == rate)) return rate; else - return -EINVAL; + return 0; } static int vc5_dbl_set_rate(struct clk_hw *hw, unsigned long rate,