From patchwork Thu Dec 16 14:17:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 524892 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 73BBAC4167E for ; Thu, 16 Dec 2021 14:17:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237813AbhLPORm (ORCPT ); Thu, 16 Dec 2021 09:17:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40792 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237836AbhLPORl (ORCPT ); Thu, 16 Dec 2021 09:17:41 -0500 Received: from laurent.telenet-ops.be (laurent.telenet-ops.be [IPv6:2a02:1800:110:4::f00:19]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C4D57C061751 for ; Thu, 16 Dec 2021 06:17:40 -0800 (PST) Received: from ramsan.of.borg ([IPv6:2a02:1810:ac12:ed20:d13f:527c:5504:a743]) by laurent.telenet-ops.be with bizsmtp id X2He2600V250X30012Hez5; Thu, 16 Dec 2021 15:17:39 +0100 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1mxrZi-005QZj-Ao; Thu, 16 Dec 2021 15:17:38 +0100 Received: from geert by rox.of.borg with local (Exim 4.93) (envelope-from ) id 1mxrZh-009yoC-Ku; Thu, 16 Dec 2021 15:17:37 +0100 From: Geert Uytterhoeven To: Greg Kroah-Hartman , Jiri Slaby Cc: Wolfram Sang , Ulrich Hecht , Laurent Pinchart , linux-serial@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-sh@vger.kernel.org, uclinux-h8-devel@lists.sourceforge.jp, Geert Uytterhoeven Subject: [PATCH 3/3] serial: sh-sci: Use devm_clk_get_optional() Date: Thu, 16 Dec 2021 15:17:34 +0100 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org The sh-sci driver supports up to four input clocks, of which only the first one is mandatory. Replace devm_clk_get() and custom error checking by devm_clk_get_optional(), to simplify the code and to catch all real errors. Signed-off-by: Geert Uytterhoeven Reviewed-by: Laurent Pinchart Reviewed-by: Wolfram Sang --- drivers/tty/serial/sh-sci.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 5f6d85b8e3dd4173..bb3adf0a109324ca 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -2779,11 +2779,11 @@ static int sci_init_clocks(struct sci_port *sci_port, struct device *dev) clk_names[SCI_SCK] = "hsck"; for (i = 0; i < SCI_NUM_CLKS; i++) { - clk = devm_clk_get(dev, clk_names[i]); - if (PTR_ERR(clk) == -EPROBE_DEFER) - return -EPROBE_DEFER; + clk = devm_clk_get_optional(dev, clk_names[i]); + if (IS_ERR(clk)) + return PTR_ERR(clk); - if (IS_ERR(clk) && i == SCI_FCK) { + if (!clk && i == SCI_FCK) { /* * Not all SH platforms declare a clock lookup entry * for SCI devices, in which case we need to get the @@ -2796,13 +2796,12 @@ static int sci_init_clocks(struct sci_port *sci_port, struct device *dev) clk_names[i]); } - if (IS_ERR(clk)) - dev_dbg(dev, "failed to get %s (%ld)\n", clk_names[i], - PTR_ERR(clk)); + if (!clk) + dev_dbg(dev, "failed to get %s\n", clk_names[i]); else dev_dbg(dev, "clk %s is %pC rate %lu\n", clk_names[i], clk, clk_get_rate(clk)); - sci_port->clks[i] = IS_ERR(clk) ? NULL : clk; + sci_port->clks[i] = clk; } return 0; }