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: 13621656 Received: from mail-yw1-f201.google.com (mail-yw1-f201.google.com [209.85.128.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2E3E014A0B1 for ; Mon, 8 Apr 2024 23:13:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712618009; cv=none; b=YAVM8rWK4r+PQqylIQUtORTXU44MwaO9rk+rQ83t/Cn7xrPi1mS1GG8/Ovz6tUNut0rOpGeXsPyxf3cdsWvVUOOKA5lEVLaccgsCDeDextJsI0opVJuytr+od1yW8RwNpAQqGD5/eaZct2hkg76P0qk+ippkHwS/w3I5PyAM4Ng= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712618009; c=relaxed/simple; bh=e6fodSav/CbFNwfCAIa1o37PSzn8hWZNWnEmaNgYfBo=; h=Date:In-Reply-To:Message-Id:Mime-Version:References:Subject:From: To:Cc:Content-Type; b=Y7IUZZDZOrflrXNCR2U4DmjdP3RiH0pJBZ49bjfCrVxf4AwPWHFqfsbYK7Mt+Iat8U/dJqQQvxxapCRgXpKlDabN6/UQrdsjwltf8gHPeblBIWejQfnBw/wFmUq7RMc0FCOJEs/yv1bnhKsJvwsqupfbB6SkeAkjjwxVZBbM0lk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--saravanak.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=Av+qYfsT; arc=none smtp.client-ip=209.85.128.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--saravanak.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="Av+qYfsT" Received: by mail-yw1-f201.google.com with SMTP id 00721157ae682-60a61b31993so78712137b3.1 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.linux.dev; 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=Av+qYfsTpMa0HuUnwJL3fHVFbB3yOMcRbofjFtTgWYXuL7N2+rbLN8nw4saFiOZ5MF 8UPkHfpJLTkfEeZAd8U5q3IugRGbV+/1UsP0ubumijTOu+CJpWjSqif0HV0k6KIb8rbJ EFIIOjX5J+q+TzmL/XqXX5Pgc3zf399xDTmxnVQJD0G5ukEohottYvuTzUwq5/zbbgZc L6iVD/GG82BcaKJjxi1rIxWLgPRHNE7COBvneWQMY17X78wnk3TVEQRdeP73OMO65sCf QLl7WsQlnvuQg1c4lglrMKx0/RVHF/YgdzdqytKCKzH3no2nPz/pmNacm8or1FHxAg+j O9OQ== 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=CByx6KP53H0gOLCvhLjC2W5jq+gx4rD1hQTFUSaPm7qwLApJL4D7ietr5gX+RZYdWW fIREaUMSGAQYswqUueTbGoqNNtywmjgPRXHQH2D+KSXREsE8mcD0O5eoPwViVVGh73SV z4yUNrjzztapm4l1jdwzubVk5OBRkEnU6J158BAqzYoG2Ewd/sCkU8vT4QBj3PUfXLAw zE+HjwcK+5lhl+ZSIZa7dLWk1GZask2d2KzWJDU/NMCkKy7lQy0XVA21IFVDlPIv63AM X6jziYAavfyv6I1zE/0xtpA0yt4/ctbFMqaBHtlvGsuOJNaUIyQUFXuzJxCk0+GFDJ/z oM2Q== X-Forwarded-Encrypted: i=1; AJvYcCUwwPYxgafHoyVu8L0u6Ss9l3TzJk1m3zJslhYbdWVrNiVz+6EgaqgPYsoBjM/tylVlHLK2vTFDuQRbTMZgXFgodcQL X-Gm-Message-State: AOJu0Yzfmmnhw1YarA4SKAzz5FdoepTevVenZHmAYxt3Uuf/isi6EmPD arD3NUJtJomEnMVTUyErxssDEw5Juaj+Hme3iFvb5nJp/KX97exVulAbYzLz6/9MAHkKDjn2puf ccX8GKOChIfb5LA== 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> Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: 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 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