From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 04 Sep 2023 17:51:33 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1qdBrS-003uG0-7t for lore@lore.pengutronix.de; Mon, 04 Sep 2023 17:51:33 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qdBrP-0002rB-SZ for lore@pengutronix.de; Mon, 04 Sep 2023 17:51:32 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=xLBiN/K69LHBghQX8pEezrHQvGTKJoQ8w3jogFY4zvY=; b=Z25irXVtEZRQU+ORnXY3g1AKM3 w/rWGMimYHgzKECDV4Uss/4RvXYGgJsJRdI7Q9iBWo1a/NNusnnD7yGD5dHbgxwBrx5v7UmifPyb3 A23To2FN4oxpBEwT02bthRh3OvficOU8En3PB0+V0r+fhxjPG6ew/tXDU+uZXIlFpjFbgwiAIBb/2 EwY6LOOBHuVLsGhm23MAA7M/poG1iSi+IpPYT7Sme8+0SFbmPayyOHRGGeCiyewb3A34dJNVhHLTG doiN4Ezmr3RSOZGRDlJGP9XQ7NMg2Eaf8vTBD2chfehzNf0hXx1gkKr+Y3PaQYGpODVUmGe/EXOQU ib6WqXYA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qdBq0-004P98-0o; Mon, 04 Sep 2023 15:50:04 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qdBpv-004P8B-2a for barebox@lists.infradead.org; Mon, 04 Sep 2023 15:50:01 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qdBpr-00080t-3a; Mon, 04 Sep 2023 17:49:55 +0200 Received: from [2a0a:edc0:0:1101:1d::54] (helo=dude05.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1qdBpq-003v5y-NY; Mon, 04 Sep 2023 17:49:54 +0200 Received: from afa by dude05.red.stw.pengutronix.de with local (Exim 4.96) (envelope-from ) id 1qdBpq-009vp9-1G; Mon, 04 Sep 2023 17:49:54 +0200 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: bst@pengutronix.de, Ahmad Fatoum Date: Mon, 4 Sep 2023 17:49:52 +0200 Message-Id: <20230904154953.2367158-1-a.fatoum@pengutronix.de> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230904_084959_857281_DE6295BB X-CRM114-Status: UNSURE ( 9.73 ) X-CRM114-Notice: Please train this message. X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.9 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH master 1/2] clk: implement clk_get_optional helper X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) Lack of clock can be ok at times and thus the clk API accepts NULL arguments and treats them as no-op. Linux provides a clk_get_optional function to simplify code with such optional code, so let's provide an equivalent for barebox. Signed-off-by: Ahmad Fatoum --- include/linux/clk.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/include/linux/clk.h b/include/linux/clk.h index 8509d5ece9d5..82022e78e39d 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h @@ -932,4 +932,23 @@ static inline void clk_bulk_disable(int num_clks, #endif +/** + * clk_get_optional - lookup and obtain a reference to an optional clock + * producer. + * @dev: device for clock "consumer" + * @id: clock consumer ID + * + * Behaves the same as clk_get() except where there is no clock producer. In + * this case, instead of returning -ENOENT, the function returns NULL. + */ +static inline struct clk *clk_get_optional(struct device *dev, const char *id) +{ + struct clk *clk = clk_get(dev, id); + + if (clk == ERR_PTR(-ENOENT)) + return NULL; + + return clk; +} + #endif -- 2.39.2