From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Wed, 06 Sep 2023 15:41:06 +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 1qdsmJ-0061S6-By for lore@lore.pengutronix.de; Wed, 06 Sep 2023 15:41:06 +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 1qdsmG-0007QH-Nb for lore@pengutronix.de; Wed, 06 Sep 2023 15:41:05 +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=SmfLLcIvmjdLFXSNJC+D9dMIU/sRE9wGInmJoQz4FwQ=; b=fCuoH+qLqaw7osBlLrlGWfYq1j ntt3mtS/nGek3xBL4nF1bNF2CqEidSmnGbrP/WyC/cQZOh3sNt1PZACg1wSFnyycCt3ZLUH3k0ngO 23fyoJe4g5A65aKBJGw2o3OUzyIKyXGtBRlLI+LEURuh+1WHflUiluduL+5g3Zew9WHe+Iyur8/m5 o5d4za81LgtxK0tPsNoTw7mgJPC0sz2ft+Gh4QSz7rHRM00FCTOn3ZnbF9PNFMvH6DDDAX7Tp4+9d c6MERaAWp0yRx0YANpRvTIsUbKRdNAETHM/U16CaDUiR7vReqGyfROOTModFBelL+nrOdMGqYMp77 dTdIM8CA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qdsl3-00A54E-0W; Wed, 06 Sep 2023 13:39:49 +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 1qdskz-00A533-32 for barebox@lists.infradead.org; Wed, 06 Sep 2023 13:39:47 +0000 Received: from dude04.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::ac]) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1qdsky-000703-85; Wed, 06 Sep 2023 15:39:44 +0200 From: Bastian Krause To: barebox@lists.infradead.org Cc: Ahmad Fatoum , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Marco Felsch Date: Wed, 6 Sep 2023 15:39:27 +0200 Message-Id: <20230906133928.1609901-1-bst@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-20230906_063946_035612_53BBD5F9 X-CRM114-Status: UNSURE ( 9.65 ) 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=-5.3 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 v2 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) From: Ahmad Fatoum 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 Reviewed-by: Marco Felsch --- No changes since (implicit) v1. --- include/linux/clk.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/include/linux/clk.h b/include/linux/clk.h index 8509d5ece9d..82022e78e39 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