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a=rsa-sha256; c=relaxed/relaxed; d=renesasgroup.onmicrosoft.com; s=selector1-renesas-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=XfYTM+XI02JlmeTrmFqi7/l9YQZVkFTE06jtXMM7qJM=; b=aRhoo1+sKryo8xNQYpAxb9+ckPVESVYef+MxpVzGHQC81XuAGnslCeFDGLqtItEv1w+Vbe/yAdwYRFdo29oZEcPLb5o/PqpdV1hqB1x5U7c7WaRc1vO+1QXE2QFgmXdgUntW5IYENeGZIIX8POmvZ7Si4zEpaZ2E/tILCv7hQ10= Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=<>; Received: from localhost.localdomain (211.11.155.138) by OSBPR01MB2293.jpnprd01.prod.outlook.com (2603:1096:603:26::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.20.776.11; Tue, 22 May 2018 12:01:48 +0000 From: Yoshihiro Shimoda To: gregkh@linuxfoundation.org, robh+dt@kernel.org, mark.rutland@arm.com Cc: heikki.krogerus@linux.intel.com, hdegoede@redhat.com, andy.shevchenko@gmail.com, linux-usb@vger.kernel.org, linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org, Yoshihiro Shimoda Subject: [PATCH/RFC v4 1/4] base: devcon: add graph parse in device_connection_find_match() Date: Tue, 22 May 2018 21:01:06 +0900 Message-Id: <1526990469-20739-2-git-send-email-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1526990469-20739-1-git-send-email-yoshihiro.shimoda.uh@renesas.com> References: <1526990469-20739-1-git-send-email-yoshihiro.shimoda.uh@renesas.com> MIME-Version: 1.0 X-Originating-IP: [211.11.155.138] X-ClientProxiedBy: TY2PR01CA0016.jpnprd01.prod.outlook.com (2603:1096:404:a::28) To OSBPR01MB2293.jpnprd01.prod.outlook.com (2603:1096:603:26::14) X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-Microsoft-Antispam: UriScan:; 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The match function will be called with fwnode pointer in struct device_connection. So, a caller can check the matching by using it. Signed-off-by: Yoshihiro Shimoda --- Documentation/driver-api/device_connection.rst | 2 +- drivers/base/devcon.c | 15 +++++++++++++++ include/linux/device.h | 2 ++ 3 files changed, 18 insertions(+), 1 deletion(-) diff --git a/Documentation/driver-api/device_connection.rst b/Documentation/driver-api/device_connection.rst index affbc556..cc6b1da 100644 --- a/Documentation/driver-api/device_connection.rst +++ b/Documentation/driver-api/device_connection.rst @@ -19,7 +19,7 @@ Device connections alone do not create a dependency between the two devices. They are only descriptions which are not tied to either of the devices directly. A dependency between the two devices exists only if one of the two endpoint devices requests a reference to the other. The descriptions themselves can be -defined in firmware (not yet supported) or they can be built-in. +defined in firmware or they can be built-in. Usage ----- diff --git a/drivers/base/devcon.c b/drivers/base/devcon.c index d427e80..374bb39 100644 --- a/drivers/base/devcon.c +++ b/drivers/base/devcon.c @@ -7,6 +7,7 @@ */ #include +#include static DEFINE_MUTEX(devcon_lock); static LIST_HEAD(devcon_list); @@ -31,10 +32,24 @@ void *device_connection_find_match(struct device *dev, const char *con_id, struct device_connection *con; void *ret = NULL; int ep; + struct device_connection graph; + struct fwnode_handle *fwnode_ep; + struct fwnode_handle *remote; if (!match) return NULL; + fwnode_graph_for_each_endpoint(dev->fwnode, fwnode_ep) { + remote = fwnode_graph_get_remote_port_parent(fwnode_ep); + if (!remote) + continue; + + graph.fwnode = remote; + ret = match(&graph, 0, data); + if (!IS_ERR(ret)) + return ret; + } + mutex_lock(&devcon_lock); list_for_each_entry(con, &devcon_list, list) { diff --git a/include/linux/device.h b/include/linux/device.h index 0059b99..175907b 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -734,11 +734,13 @@ struct device_dma_parameters { * struct device_connection - Device Connection Descriptor * @endpoint: The names of the two devices connected together * @id: Unique identifier for the connection + * @fwnode: fwnode pointer for finding a connection from graph * @list: List head, private, for internal use only */ struct device_connection { const char *endpoint[2]; const char *id; + struct fwnode_handle *fwnode; struct list_head list; };