From patchwork Thu Jan 9 03:35:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Q2h1bmZlbmcgWXVuICjkupHmmKXls7Ap?= X-Patchwork-Id: 1220136 X-Patchwork-Delegate: trini@ti.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; helo=phobos.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=mediatek.com header.i=@mediatek.com header.a=rsa-sha256 header.s=dk header.b=IJzVIgU6; dkim-atps=neutral Received: from phobos.denx.de (phobos.denx.de [IPv6:2a01:238:438b:c500:173d:9f52:ddab:ee01]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 47tWwg4F0hz9sR0 for ; Thu, 9 Jan 2020 14:35:47 +1100 (AEDT) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id 1E5878184B; Thu, 9 Jan 2020 04:35:31 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Authentication-Results: phobos.denx.de; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=mediatek.com header.i=@mediatek.com header.b="IJzVIgU6"; dkim-atps=neutral Received: by phobos.denx.de (Postfix, from userid 109) id B881B81843; Thu, 9 Jan 2020 04:35:28 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on phobos.denx.de X-Spam-Level: * X-Spam-Status: No, score=1.2 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MIME_BASE64_TEXT,RDNS_NONE,SPF_HELO_NONE, UNPARSEABLE_RELAY,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.2 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by phobos.denx.de (Postfix) with ESMTP id 20A4F81823 for ; Thu, 9 Jan 2020 04:35:23 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=mediatek.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=chunfeng.yun@mediatek.com X-UUID: dc4fffdce27a4e8cb43fac9f1f423702-20200109 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=l62Ad0vd6JzIZOW7coiUy/s7g70K5NrCu3uuCIOzymA=; b=IJzVIgU6sdWuaU8WdwWjUHIT3j4w0dYWgBRVWl14TldUz7LJBuT3rxHocD0smC+wTUawUU59eCFY9XCLwyVZc4Ecg2TXcAvFPBGnmtloIyWdPGrKMlobNUet/smq8zv8cjA9fIYVau3KLYnUAHZ0x5uAVf7FFyTeypwaVDmQKYA=; X-UUID: dc4fffdce27a4e8cb43fac9f1f423702-20200109 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw02.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 265876883; Thu, 09 Jan 2020 11:35:20 +0800 Received: from mtkcas09.mediatek.inc (172.21.101.178) by mtkmbs08n1.mediatek.inc (172.21.101.55) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 9 Jan 2020 11:35:51 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Thu, 9 Jan 2020 11:35:55 +0800 From: Chunfeng Yun To: Lukasz Majewski , Ryder Lee Subject: [PATCH v2 4/7] clk: add APIs to get (optional) clock by name without a device Date: Thu, 9 Jan 2020 11:35:07 +0800 Message-ID: <1578540910-3516-4-git-send-email-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1578540910-3516-1-git-send-email-chunfeng.yun@mediatek.com> References: <1578540910-3516-1-git-send-email-chunfeng.yun@mediatek.com> MIME-Version: 1.0 X-MTK: N X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.26 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Tom Rini , u-boot@lists.denx.de, GSS_MTK_Uboot_upstream Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.101.4 at phobos.denx.de X-Virus-Status: Clean Sometimes we may need get (optional) clock without a device, that means use ofnode. e.g. when the phy node has subnode, and there is no device created for subnode, in this case, we need these new APIs to get subnode's clock. Signed-off-by: Chunfeng Yun Reviewed-by: Simon Glass Reviewed-by: Ryder Lee --- v2: add reviewed-by Simon & Ryder --- drivers/clk/clk-uclass.c | 28 ++++++++++++++++++++++++++++ include/clk.h | 40 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 68 insertions(+) diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c index b7e18668cb..93cb490eb5 100644 --- a/drivers/clk/clk-uclass.c +++ b/drivers/clk/clk-uclass.c @@ -344,6 +344,34 @@ int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk) return clk_get_by_index(dev, index, clk); } +int clk_get_by_name_nodev(ofnode node, const char *name, struct clk *clk) +{ + int index; + + debug("%s(node=%p, name=%s, clk=%p)\n", __func__, + ofnode_get_name(node), name, clk); + clk->dev = NULL; + + index = ofnode_stringlist_search(node, "clock-names", name); + if (index < 0) { + debug("fdt_stringlist_search() failed: %d\n", index); + return index; + } + + return clk_get_by_index_nodev(node, index, clk); +} + +int clk_get_optional_nodev(ofnode node, const char *name, struct clk *clk) +{ + int ret; + + ret = clk_get_by_name_nodev(node, name, clk); + if (ret == -ENODATA) + return 0; + + return ret; +} + int clk_release_all(struct clk *clk, int count) { int i, ret; diff --git a/include/clk.h b/include/clk.h index a5ee53d94a..3336301815 100644 --- a/include/clk.h +++ b/include/clk.h @@ -154,6 +154,34 @@ int clk_get_bulk(struct udevice *dev, struct clk_bulk *bulk); */ int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk); +/** + * clk_get_by_name_nodev - Get/request a clock by name without a device. + * + * This is a version of clk_get_by_name() that does not use a device. + * + * @node: The client ofnode. + * @name: The name of the clock to request, within the client's list of + * clocks. + * @clock: A pointer to a clock struct to initialize. + * @return 0 if OK, or a negative error code. + */ +int clk_get_by_name_nodev(ofnode node, const char *name, struct clk *clk); + +/** + * clock_get_optional_nodev - Get/request an optinonal clock by name + * without a device. + * @node: The client ofnode. + * @name: The name of the clock to request. + * @name: The name of the clock to request, within the client's list of + * clocks. + * @clock: A pointer to a clock struct to initialize. + * + * Behaves the same as clk_get_by_name_nodev() except where there is + * no clock producer, in this case, skip the error number -ENODATA, and + * the function returns 0. + */ +int clk_get_optional_nodev(ofnode node, const char *name, struct clk *clk); + /** * devm_clk_get - lookup and obtain a managed reference to a clock producer. * @dev: device for clock "consumer" @@ -230,6 +258,18 @@ static inline int clk_get_by_name(struct udevice *dev, const char *name, return -ENOSYS; } +static inline int +clk_get_by_name_nodev(ofnode node, const char *name, struct clk *clk) +{ + return -ENOSYS; +} + +static inline int +clk_get_optional_nodev(ofnode node, const char *name, struct clk *clk) +{ + return -ENOSYS; +} + static inline int clk_release_all(struct clk *clk, int count) { return -ENOSYS;