From patchwork Mon Apr 8 23:13:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravana Kannan X-Patchwork-Id: 13621658 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 01147CD1292 for ; Mon, 8 Apr 2024 23:13:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:From:Subject:References: Mime-Version:Message-Id:In-Reply-To:Date:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=ITzKRFIJnvf9AIGgCG7bdiQ1yc7iAsswb8dw2eJj02Y=; b=UKH1T0E8YmZPLFZBJpKck8MwqG EvDoZDnYXY0TRTvF9bhfaV8ZXOd7lJw6GZ++ZJJ/yArbJnXSsFCPk8gS7DSDCS5NZG1xexDnSxx2u HW1WqQufRAHARXg629ztvq4BH1gPHm+TI1EzyWDa6t3Fr4KYO4M982UFHBlg3VMSkKMPT3pDrF5br AyDMOQR8csCudFqk7Dmswv22mrQuEIJfNhOz+O+o8QWZKTNGeNBo1kJuTy78YtEkwVB4esKtrAwH+ wAKQWkm+XeeIpW6Hvftx1cJPdrFq981s4WG78TX2q0mVz3+XzUVfh2w/PEQHISDN/RCCnuLlN0Cr9 lo8pDU7A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rtyBE-0000000H7Ad-1dOt; Mon, 08 Apr 2024 23:13:36 +0000 Received: from mail-yw1-x1149.google.com ([2607:f8b0:4864:20::1149]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rtyBB-0000000H77u-2Xjv for linux-arm-kernel@lists.infradead.org; Mon, 08 Apr 2024 23:13:35 +0000 Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-61517841a2eso85634667b3.2 for ; Mon, 08 Apr 2024 16:13:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1712618006; x=1713222806; darn=lists.infradead.org; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=nczmkQOw9DMhXXSsKHtJl6R+5z/iUhkTreCA2OOkZws=; b=RJIA2KWrCb6RUxJl5wqdbS9C5XX0Lhc1R56ua9qJNqJYB7FTHiYCWK52gDKJRyXiGR uKW6n4eqpLnM26Rh2HASmzpkZZB0y+8qjDUaWIt5MbsWjiFikhRWpQI7CeW1p997nBBq ffUlUcB12wfBlm9mferYmjsOgeoGpLki2LjFjL48U0Sq4O1E6bFembjbLGT/7HE4Vyi/ UDpcUANvmWn74J0ra3yzERytg5eoE76iSjdTn0CaF3DJjetqR5cdXWEHBeYS18Y4y/wE uaM9Obbhsth2hXyB+UprszVsr8XzRJ26OzJuim3qiIsV4k+K7dkmWag99OWOylK+/gkJ z34g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712618006; x=1713222806; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=nczmkQOw9DMhXXSsKHtJl6R+5z/iUhkTreCA2OOkZws=; b=oiEA/64LiU9H8kXWZoaTO3nnf6C1S+xh38Xa3ra/Fd4Tn3czargXoy0uVHAdNURp9u xMwfUYUIhIPXyggpHH6QHPtn2GxickeZYtl0iT1sMPMi61phnMS+s6M3TsDz3panYOk3 YLx5CvEpgacmC2z8vqbZeWcRFO8oTZu/iFh+uYXRmXzej3Sb5o6e47xnUd+n65WiSLls lLtr0OJCFPb5O+iLlCzgjKL2F7aiVtf9qapuToKTP8PBvIMlI5AesU6mOWHzJnApMzHX ePSCfSW/N4gxPqAFqs5+RcsKp46b65Pj2+5wlB+p4jGKoabamq8RHZMYLtYHsQq8PnrM yWvg== X-Forwarded-Encrypted: i=1; AJvYcCXkYnv3X714J1tHbyPWwtmfBbSSqtrkxcj/Pr/Q0v8+WMqFG/rhP7X2HeXrp/838sLIk2fJz8xH61YGB7WOW7nxMRFA+jLTm12ezjaHIE+peIXK5bg= X-Gm-Message-State: AOJu0YxkU7LIT589amrlKi3lSECSE3JnT8R48iGc28/Gi5GyvVuTGy4D iIKgw/EeVY+LUz+vS85ZqXPev1d8pPrTAOegr4wmN+nfPncUZnqPXjhbvLZpm4bVDW7214+mVJk Le8/jH+Vvfk1hWg== X-Google-Smtp-Source: AGHT+IHInv1s683PD0VpXFGdyKVT7quDre0k4j4QPZmziEdXPq9Eij+lZ0mHQQ58tOImSwsWuy4cFSS2rHxW/D0= X-Received: from saravanak.san.corp.google.com ([2620:15c:2d:3:96d3:321a:67f3:5322]) (user=saravanak job=sendgmr) by 2002:a25:7456:0:b0:dc7:5c0d:f177 with SMTP id p83-20020a257456000000b00dc75c0df177mr3025061ybc.6.1712618006311; Mon, 08 Apr 2024 16:13:26 -0700 (PDT) Date: Mon, 8 Apr 2024 16:13:09 -0700 In-Reply-To: <20240408231310.325451-1-saravanak@google.com> Message-Id: <20240408231310.325451-3-saravanak@google.com> Mime-Version: 1.0 References: <20240408231310.325451-1-saravanak@google.com> X-Mailer: git-send-email 2.44.0.478.gd926399ef9-goog Subject: [RFC PATCH v1 2/2] of: dynamic: Fix probing of overlay devices From: Saravana Kannan To: Herve Codina , Geert Uytterhoeven Cc: Saravana Kannan , Rob Herring , kernel-team@android.com, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-spi@vger.kernel.org, linux-acpi@vger.kernel.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240408_161333_680427_FB45C931 X-CRM114-Status: GOOD ( 11.61 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Get fw_devlink to work well with overlay devices. Signed-off-by: Saravana Kannan --- drivers/base/core.c | 10 ++++++++++ drivers/of/dynamic.c | 8 ++++++++ include/linux/fwnode.h | 2 ++ 3 files changed, 20 insertions(+) diff --git a/drivers/base/core.c b/drivers/base/core.c index 5f4e03336e68..d856f9c5d601 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -237,6 +237,16 @@ static void __fw_devlink_pickup_dangling_consumers(struct fwnode_handle *fwnode, __fw_devlink_pickup_dangling_consumers(child, new_sup); } + +void fw_devlink_pickup_dangling_consumers(struct fwnode_handle *child, + struct fwnode_handle *parent) +{ + mutex_lock(&fwnode_link_lock); + __fw_devlink_pickup_dangling_consumers(child, parent); + __fw_devlink_link_to_consumers(parent->dev); + mutex_unlock(&fwnode_link_lock); +} + static DEFINE_MUTEX(device_links_lock); DEFINE_STATIC_SRCU(device_links_srcu); diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c index 19a1a38554f2..0a936f46820e 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -237,6 +237,7 @@ static void __of_attach_node(struct device_node *np) int of_attach_node(struct device_node *np) { struct of_reconfig_data rd; + struct fwnode_handle *fwnode, *parent; memset(&rd, 0, sizeof(rd)); rd.dn = np; @@ -246,6 +247,13 @@ int of_attach_node(struct device_node *np) mutex_unlock(&of_mutex); of_reconfig_notify(OF_RECONFIG_ATTACH_NODE, &rd); + fwnode = of_fwnode_handle(np); + fwnode_for_each_parent_node(fwnode, parent) + if (parent->dev) { + fw_devlink_pickup_dangling_consumers(fwnode, parent); + fwnode_handle_put(parent); + break; + } return 0; } diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h index 0d79070c5a70..4b3f697a90e8 100644 --- a/include/linux/fwnode.h +++ b/include/linux/fwnode.h @@ -220,6 +220,8 @@ int fwnode_link_add(struct fwnode_handle *con, struct fwnode_handle *sup, u8 flags); void fwnode_links_purge(struct fwnode_handle *fwnode); void fw_devlink_purge_absent_suppliers(struct fwnode_handle *fwnode); +void fw_devlink_pickup_dangling_consumers(struct fwnode_handle *child, + struct fwnode_handle *parent); bool fw_devlink_is_strict(void); #endif