From mboxrd@z Thu Jan 1 00:00:00 1970 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 smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6901AE6BF2B for ; Fri, 30 Jan 2026 16:54:03 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 1803840DCB; Fri, 30 Jan 2026 16:54:03 +0000 (UTC) X-Virus-Scanned: amavis at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavis, port 10024) with ESMTP id fxtiC6kYNdBN; Fri, 30 Jan 2026 16:54:02 +0000 (UTC) X-Comment: SPF check N/A for local connections - client-ip=140.211.166.142; helo=lists1.osuosl.org; envelope-from=intel-wired-lan-bounces@osuosl.org; receiver= DKIM-Filter: OpenDKIM Filter v2.11.0 smtp4.osuosl.org 41C4440DC6 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=osuosl.org; s=default; t=1769792042; bh=RF3m9enShdWiXzUXZNtS2CQYysIh3cifFUaNy6hTVDE=; h=From:To:Cc:Date:In-Reply-To:References:Subject:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=afgj8gMvCIqbXxSigw8zLyzrKKr06mM5e8S/Aw8oi+BvsYtzXfWLpwGGZOJWiycaH LUIXwg69FwzgXUHjBKZVXMvJmYLAtwTGmgxwq0w4TlJFFrWsroCIhVCf5knfOqsLRD DO6C6a1CN7oQzk8BETutkTEb2JKdB7B6uzDfdc2TEwl1Vu5SEAews8CZCdzp4WQxGs HA0coiYJ5qqyU92YVj2v1T7yXRdU6Cd4sejdXJhkqIT98BcOL96JD/g1IAHYR34QsB UEPsiIMdAfPeboXtNmpygVb1TSa0EAf2N72DiO0e73rFJEJmxwu3steKa/PYt0W/76 57ylouTQiseDw== Received: from lists1.osuosl.org (lists1.osuosl.org [140.211.166.142]) by smtp4.osuosl.org (Postfix) with ESMTP id 41C4440DC6; Fri, 30 Jan 2026 16:54:02 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [IPv6:2605:bc80:3010::136]) by lists1.osuosl.org (Postfix) with ESMTP id 3C38669 for ; Fri, 30 Jan 2026 16:54:01 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 2CC4A60E09 for ; Fri, 30 Jan 2026 16:54:01 +0000 (UTC) X-Virus-Scanned: amavis at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavis, port 10024) with ESMTP id tm1YviQ1PxE4 for ; Fri, 30 Jan 2026 16:54:00 +0000 (UTC) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=170.10.133.124; helo=us-smtp-delivery-124.mimecast.com; envelope-from=ivecera@redhat.com; receiver= DMARC-Filter: OpenDMARC Filter v1.4.2 smtp3.osuosl.org 14E7160D94 DKIM-Filter: OpenDKIM Filter v2.11.0 smtp3.osuosl.org 14E7160D94 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by smtp3.osuosl.org (Postfix) with ESMTPS id 14E7160D94 for ; Fri, 30 Jan 2026 16:53:59 +0000 (UTC) Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-344-w6w6M7FqMCWu8Zj3k7T4XQ-1; Fri, 30 Jan 2026 11:53:56 -0500 X-MC-Unique: w6w6M7FqMCWu8Zj3k7T4XQ-1 X-Mimecast-MFC-AGG-ID: w6w6M7FqMCWu8Zj3k7T4XQ_1769792033 Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id F119E1956088; Fri, 30 Jan 2026 16:53:52 +0000 (UTC) Received: from p16v.redhat.com (unknown [10.45.226.27]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 059341800870; Fri, 30 Jan 2026 16:53:46 +0000 (UTC) From: Ivan Vecera To: netdev@vger.kernel.org Cc: Vadim Fedorenko , Alexander Lobakin , Andrew Lunn , Arkadiusz Kubalewski , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Jiri Pirko , Jonathan Lemon , Leon Romanovsky , Mark Bloch , Paolo Abeni , Prathosh Satish , Przemek Kitszel , Richard Cochran , Saeed Mahameed , Tariq Toukan , Tony Nguyen , intel-wired-lan@lists.osuosl.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org Date: Fri, 30 Jan 2026 17:53:30 +0100 Message-ID: <20260130165338.101860-2-ivecera@redhat.com> In-Reply-To: <20260130165338.101860-1-ivecera@redhat.com> References: <20260130165338.101860-1-ivecera@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1769792038; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RF3m9enShdWiXzUXZNtS2CQYysIh3cifFUaNy6hTVDE=; b=hW17ilVBu0VLR/RiVGjI3S118mnwZZzpOXR3LqLiu4qV8s6RJXgeddlzwiyIHt37RWfcyN rEez+tRXe68WbVofzfUxkicOHT+mxZg5AANkwDw+aFE7X2KWGe32PxNb1N75QheHUNjDd3 B8hGxjYscFIWFoaWXwLsWY0t8x6ke3k= X-Mailman-Original-Authentication-Results: smtp3.osuosl.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com X-Mailman-Original-Authentication-Results: smtp3.osuosl.org; dkim=pass (1024-bit key, unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=hW17ilVB Subject: [Intel-wired-lan] [PATCH net-next v3 1/9] dpll: Allow associating dpll pin with a firmware node X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" Extend the DPLL core to support associating a DPLL pin with a firmware node. This association is required to allow other subsystems (such as network drivers) to locate and request specific DPLL pins defined in the Device Tree or ACPI. * Add a .fwnode field to the struct dpll_pin * Introduce dpll_pin_fwnode_set() helper to allow the provider driver to associate a pin with a fwnode after the pin has been allocated * Introduce fwnode_dpll_pin_find() helper to allow consumers to search for a registered DPLL pin using its associated fwnode handle * Ensure the fwnode reference is properly released in dpll_pin_put() Reviewed-by: Vadim Fedorenko Signed-off-by: Ivan Vecera --- drivers/dpll/dpll_core.c | 49 ++++++++++++++++++++++++++++++++++++++++ drivers/dpll/dpll_core.h | 2 ++ include/linux/dpll.h | 11 +++++++++ 3 files changed, 62 insertions(+) diff --git a/drivers/dpll/dpll_core.c b/drivers/dpll/dpll_core.c index 8879a72351561..55f3ff50a8709 100644 --- a/drivers/dpll/dpll_core.c +++ b/drivers/dpll/dpll_core.c @@ -10,6 +10,7 @@ #include #include +#include #include #include @@ -595,12 +596,60 @@ void dpll_pin_put(struct dpll_pin *pin) xa_destroy(&pin->parent_refs); xa_destroy(&pin->ref_sync_pins); dpll_pin_prop_free(&pin->prop); + fwnode_handle_put(pin->fwnode); kfree_rcu(pin, rcu); } mutex_unlock(&dpll_lock); } EXPORT_SYMBOL_GPL(dpll_pin_put); +/** + * dpll_pin_fwnode_set - set dpll pin firmware node reference + * @pin: pointer to a dpll pin + * @fwnode: firmware node handle + * + * Set firmware node handle for the given dpll pin. + */ +void dpll_pin_fwnode_set(struct dpll_pin *pin, struct fwnode_handle *fwnode) +{ + mutex_lock(&dpll_lock); + fwnode_handle_put(pin->fwnode); /* Drop fwnode previously set */ + pin->fwnode = fwnode_handle_get(fwnode); + mutex_unlock(&dpll_lock); +} +EXPORT_SYMBOL_GPL(dpll_pin_fwnode_set); + +/** + * fwnode_dpll_pin_find - find dpll pin by firmware node reference + * @fwnode: reference to firmware node + * + * Get existing object of a pin that is associated with given firmware node + * reference. + * + * Context: Acquires a lock (dpll_lock) + * Return: + * * valid dpll_pin struct pointer if succeeded + * * ERR_PTR(X) - error + */ +struct dpll_pin *fwnode_dpll_pin_find(struct fwnode_handle *fwnode) +{ + struct dpll_pin *pin, *ret = NULL; + unsigned long index; + + mutex_lock(&dpll_lock); + xa_for_each(&dpll_pin_xa, index, pin) { + if (pin->fwnode == fwnode) { + ret = pin; + refcount_inc(&ret->refcount); + break; + } + } + mutex_unlock(&dpll_lock); + + return ret; +} +EXPORT_SYMBOL_GPL(fwnode_dpll_pin_find); + static int __dpll_pin_register(struct dpll_device *dpll, struct dpll_pin *pin, const struct dpll_pin_ops *ops, void *priv, void *cookie) diff --git a/drivers/dpll/dpll_core.h b/drivers/dpll/dpll_core.h index 8ce969bbeb64e..d3e17ff0ecef0 100644 --- a/drivers/dpll/dpll_core.h +++ b/drivers/dpll/dpll_core.h @@ -42,6 +42,7 @@ struct dpll_device { * @pin_idx: index of a pin given by dev driver * @clock_id: clock_id of creator * @module: module of creator + * @fwnode: optional reference to firmware node * @dpll_refs: hold referencees to dplls pin was registered with * @parent_refs: hold references to parent pins pin was registered with * @ref_sync_pins: hold references to pins for Reference SYNC feature @@ -54,6 +55,7 @@ struct dpll_pin { u32 pin_idx; u64 clock_id; struct module *module; + struct fwnode_handle *fwnode; struct xarray dpll_refs; struct xarray parent_refs; struct xarray ref_sync_pins; diff --git a/include/linux/dpll.h b/include/linux/dpll.h index c6d0248fa5273..f2e8660e90cdf 100644 --- a/include/linux/dpll.h +++ b/include/linux/dpll.h @@ -16,6 +16,7 @@ struct dpll_device; struct dpll_pin; struct dpll_pin_esync; +struct fwnode_handle; struct dpll_device_ops { int (*mode_get)(const struct dpll_device *dpll, void *dpll_priv, @@ -178,6 +179,8 @@ void dpll_netdev_pin_clear(struct net_device *dev); size_t dpll_netdev_pin_handle_size(const struct net_device *dev); int dpll_netdev_add_pin_handle(struct sk_buff *msg, const struct net_device *dev); + +struct dpll_pin *fwnode_dpll_pin_find(struct fwnode_handle *fwnode); #else static inline void dpll_netdev_pin_set(struct net_device *dev, struct dpll_pin *dpll_pin) { } @@ -193,6 +196,12 @@ dpll_netdev_add_pin_handle(struct sk_buff *msg, const struct net_device *dev) { return 0; } + +static inline struct dpll_pin * +fwnode_dpll_pin_find(struct fwnode_handle *fwnode) +{ + return NULL; +} #endif struct dpll_device * @@ -218,6 +227,8 @@ void dpll_pin_unregister(struct dpll_device *dpll, struct dpll_pin *pin, void dpll_pin_put(struct dpll_pin *pin); +void dpll_pin_fwnode_set(struct dpll_pin *pin, struct fwnode_handle *fwnode); + int dpll_pin_on_pin_register(struct dpll_pin *parent, struct dpll_pin *pin, const struct dpll_pin_ops *ops, void *priv); -- 2.52.0