From patchwork Fri Jun 2 08:50:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 13264894 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E4BEFC7EE2A for ; Fri, 2 Jun 2023 08:51:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=dhf7CwJ31llGMhfp/yAatZWK8Zfj9OfRdb0XMCmj6h8=; b=t5a5riKAGf0YqM ugrXY3itL+u7UAJNQdW4e4nceBoCWQ6GJFrb9bLiTFGyg1MYt854Mh3yjnuo8bXtOfJbHManRF3TO kFt674PX8HknqJm9Bpulg3daBWYwA/gPeXUz48ga1gqN0gaWytKaX1DcyVIziUz7ZzaN0T2t3xJLX ncwx3QB0zJSiJK4ix93002kwIFcroPTqdmv9AK+zR7KaNXXV7UxQxgB/P+E99U/lDplHiQGnQFXOU Mjn/R5IFrYnE9mlXRbk7/nFaD+SE2AJfmcBYhCjZHNyPci+7/bAy0GrKNQSW/ZlUZjd/Mv1esN324 5Z4ulsop8CpJ/5RkrJDA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q50VL-006ELr-37; Fri, 02 Jun 2023 08:51:27 +0000 Received: from michel.telenet-ops.be ([2a02:1800:110:4::f00:18]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1q50VD-006ED9-19 for linux-arm-kernel@lists.infradead.org; Fri, 02 Jun 2023 08:51:23 +0000 Received: from ramsan.of.borg ([IPv6:2a02:1810:ac12:ed30:158c:2ccf:1f70:e136]) by michel.telenet-ops.be with bizsmtp id 48qo2A00B1tRZS8068qoZc; Fri, 02 Jun 2023 10:51:13 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtp (Exim 4.95) (envelope-from ) id 1q50UO-00BhYO-Uv; Fri, 02 Jun 2023 10:50:48 +0200 Received: from geert by rox.of.borg with local (Exim 4.95) (envelope-from ) id 1q50Ui-00APxh-20; Fri, 02 Jun 2023 10:50:48 +0200 From: Geert Uytterhoeven To: Michael Turquette , Stephen Boyd , Yoshihiro Shimoda , Magnus Damm , Joerg Roedel , Robin Murphy Cc: Tomasz Figa , Sylwester Nawrocki , Will Deacon , Arnd Bergmann , Wolfram Sang , Dejin Zheng , Kai-Heng Feng , Nicholas Piggin , Heiko Carstens , Peter Zijlstra , Russell King , John Stultz , Thomas Gleixner , Tony Lindgren , Krzysztof Kozlowski , Tero Kristo , Ulf Hansson , "Rafael J . Wysocki" , Vincent Guittot , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-renesas-soc@vger.kernel.org, linux-pm@vger.kernel.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH v3 5/7] clk: renesas: rzg2l: Convert to readl_poll_timeout_atomic() Date: Fri, 2 Jun 2023 10:50:40 +0200 Message-Id: <900543d4b9abc1004e6aecdb676f23e5508ae96f.1685692810.git.geert+renesas@glider.be> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230602_015119_542656_D888DA98 X-CRM114-Status: GOOD ( 15.73 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Use readl_poll_timeout_atomic() instead of open-coding the same operation. As typically no retries are needed, 10 µs is a suitable timeout value. Signed-off-by: Geert Uytterhoeven --- Polling measurements done on RZ/Five. v3: - New. --- drivers/clk/renesas/rzg2l-cpg.c | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-) diff --git a/drivers/clk/renesas/rzg2l-cpg.c b/drivers/clk/renesas/rzg2l-cpg.c index ca8b921c77625317..bc623515ad843cf5 100644 --- a/drivers/clk/renesas/rzg2l-cpg.c +++ b/drivers/clk/renesas/rzg2l-cpg.c @@ -903,9 +903,9 @@ static int rzg2l_mod_clock_endisable(struct clk_hw *hw, bool enable) unsigned int reg = clock->off; struct device *dev = priv->dev; unsigned long flags; - unsigned int i; u32 bitmask = BIT(clock->bit); u32 value; + int error; if (!clock->off) { dev_dbg(dev, "%pC does not support ON/OFF\n", hw->clk); @@ -930,19 +930,13 @@ static int rzg2l_mod_clock_endisable(struct clk_hw *hw, bool enable) if (!priv->info->has_clk_mon_regs) return 0; - for (i = 1000; i > 0; --i) { - if (((readl(priv->base + CLK_MON_R(reg))) & bitmask)) - break; - cpu_relax(); - } - - if (!i) { + error = readl_poll_timeout_atomic(priv->base + CLK_MON_R(reg), value, + value & bitmask, 0, 10); + if (error) dev_err(dev, "Failed to enable CLK_ON %p\n", priv->base + CLK_ON_R(reg)); - return -ETIMEDOUT; - } - return 0; + return error; } static int rzg2l_mod_clock_enable(struct clk_hw *hw)