From patchwork Wed Jan 18 10:15:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 644991 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 5FAB9C677F1 for ; Wed, 18 Jan 2023 11:09:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230208AbjARLJW (ORCPT ); Wed, 18 Jan 2023 06:09:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57394 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230235AbjARLIu (ORCPT ); Wed, 18 Jan 2023 06:08:50 -0500 Received: from albert.telenet-ops.be (albert.telenet-ops.be [IPv6:2a02:1800:110:4::f00:1a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 18CB495748 for ; Wed, 18 Jan 2023 02:15:48 -0800 (PST) Received: from ramsan.of.borg ([IPv6:2a02:1810:ac12:ed50:4745:2e6d:e3a6:3327]) by albert.telenet-ops.be with bizsmtp id AAFN290022zf9gW06AFN2Z; Wed, 18 Jan 2023 11:15:46 +0100 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtp (Exim 4.95) (envelope-from ) id 1pI5TQ-005aIM-Lz; Wed, 18 Jan 2023 11:15:22 +0100 Received: from geert by rox.of.borg with local (Exim 4.95) (envelope-from ) id 1pI5TV-001JVj-W5; Wed, 18 Jan 2023 11:15:21 +0100 From: Geert Uytterhoeven To: Madalin Bucur , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Horatiu Vultur , UNGLinuxDriver@microchip.com, Thierry Reding , Lorenzo Pieralisi , Rob Herring , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Bjorn Helgaas , Jonathan Hunter , Vinod Koul , Kishon Vijay Abraham I , Alan Stern , Greg Kroah-Hartman , Krzysztof Kozlowski , Alim Akhtar , Siddharth Vadapalli , Russell King Cc: netdev@vger.kernel.org, linux-tegra@vger.kernel.org, linux-pci@vger.kernel.org, linux-phy@lists.infradead.org, linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH 1/7] phy: Add devm_of_phy_optional_get() helper Date: Wed, 18 Jan 2023 11:15:14 +0100 Message-Id: X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Add an optional variant of devm_of_phy_get(), so drivers no longer have to open-code this operation. Signed-off-by: Geert Uytterhoeven --- drivers/phy/phy-core.c | 26 ++++++++++++++++++++++++++ include/linux/phy/phy.h | 9 ++++++++ 2 files changed, 35 insertions(+) diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c index d93ddf1262c5178b..ea009a611e19c705 100644 --- a/drivers/phy/phy-core.c +++ b/drivers/phy/phy-core.c @@ -879,6 +879,32 @@ struct phy *devm_of_phy_get(struct device *dev, struct device_node *np, } EXPORT_SYMBOL_GPL(devm_of_phy_get); +/** + * devm_of_phy_optional_get() - lookup and obtain a reference to an optional + * phy. + * @dev: device that requests this phy + * @np: node containing the phy + * @con_id: name of the phy from device's point of view + * + * Gets the phy using of_phy_get(), and associates a device with it using + * devres. On driver detach, release function is invoked on the devres data, + * then, devres data is freed. This differs to devm_of_phy_get() in + * that if the phy does not exist, it is not considered an error and + * -ENODEV will not be returned. Instead the NULL phy is returned, + * which can be passed to all other phy consumer calls. + */ +struct phy *devm_of_phy_optional_get(struct device *dev, struct device_node *np, + const char *con_id) +{ + struct phy *phy = devm_of_phy_get(dev, np, con_id); + + if (PTR_ERR(phy) == -ENODEV) + phy = NULL; + + return phy; +} +EXPORT_SYMBOL_GPL(devm_of_phy_optional_get); + /** * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index. * @dev: device that requests this phy diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h index 559c3da515073697..5f6e669b616da0b0 100644 --- a/include/linux/phy/phy.h +++ b/include/linux/phy/phy.h @@ -255,6 +255,8 @@ struct phy *devm_phy_get(struct device *dev, const char *string); struct phy *devm_phy_optional_get(struct device *dev, const char *string); struct phy *devm_of_phy_get(struct device *dev, struct device_node *np, const char *con_id); +struct phy *devm_of_phy_optional_get(struct device *dev, struct device_node *np, + const char *con_id); struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np, int index); void of_phy_put(struct phy *phy); @@ -450,6 +452,13 @@ static inline struct phy *devm_of_phy_get(struct device *dev, return ERR_PTR(-ENOSYS); } +static inline struct phy *devm_of_phy_optional_get(struct device *dev, + struct device_node *np, + const char *con_id) +{ + return NULL; +} + static inline struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np, int index)