Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Calvin Johnson <calvin.johnson@oss.nxp.com>
To:     "Rafael J . Wysocki" <rafael@kernel.org>,
        Russell King - ARM Linux admin <linux@armlinux.org.uk>,
        linux.cj@gmail.com, Jeremy Linton <jeremy.linton@arm.com>,
        Andrew Lunn <andrew@lunn.ch>,
        Andy Shevchenko <andy.shevchenko@gmail.com>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Cristi Sovaiala <cristian.sovaiala@nxp.com>,
        Florin Laurentiu Chiculita <florinlaurentiu.chiculita@nxp.com>,
        Ioana Ciornei <ioana.ciornei@nxp.com>,
        Madalin Bucur <madalin.bucur@oss.nxp.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc:     Varun Sethi <V.Sethi@nxp.com>,
        "Rajesh V . Bikkina" <rajesh.bikkina@nxp.com>,
        linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
        Diana Madalina Craciun <diana.craciun@nxp.com>,
        netdev@vger.kernel.org, Marcin Wojtas <mw@semihalf.com>,
        Laurentiu Tudor <laurentiu.tudor@nxp.com>,
        Makarand Pawagi <makarand.pawagi@nxp.com>,
        linux-arm-kernel@lists.infradead.org,
        Pankaj Bansal <pankaj.bansal@nxp.com>,
        Calvin Johnson <calvin.johnson@oss.nxp.com>,
        "David S. Miller" <davem@davemloft.net>,
        Heiner Kallweit <hkallweit1@gmail.com>
Subject: [net-next PATCH v3 1/5] net: phy: Introduce phy related fwnode functions
Date:   Tue,  5 May 2020 18:59:01 +0530
Message-Id: <20200505132905.10276-2-calvin.johnson@oss.nxp.com>
In-Reply-To: <20200505132905.10276-1-calvin.johnson@oss.nxp.com>
References: <20200505132905.10276-1-calvin.johnson@oss.nxp.com>
Content-Type: text/plain
MIME-Version: 1.0
X-MS-Exchange-MessageSentRepresentingType: 1
Received: from lsv03152.swis.in-blr01.nxp.com (14.142.151.118) by SG2PR03CA0096.apcprd03.prod.outlook.com (2603:1096:4:7c::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2979.14 via Frontend Transport; Tue, 5 May 2020 13:29:27 +0000
X-Mailer: git-send-email 2.17.1
X-Originating-IP: [14.142.151.118]
X-MS-PublicTrafficType: Email
X-MS-Office365-Filtering-HT: Tenant
X-MS-Office365-Filtering-Correlation-Id: 1542e116-80f4-472a-7669-08d7f0f858e3
X-MS-TrafficTypeDiagnostic: DB8PR04MB5596:|DB8PR04MB5596:
X-MS-Exchange-SharedMailbox-RoutingAgent-Processed: True
X-MS-Exchange-Transport-Forked: True
X-Microsoft-Antispam-PRVS: <DB8PR04MB559633773E33A2CF64967427D2A70@DB8PR04MB5596.eurprd04.prod.outlook.com>
X-MS-Oob-TLC-OOBClassifiers: OLM:1751;
X-Forefront-PRVS: 0394259C80
Received-SPF: None (protection.outlook.com: oss.nxp.com does not designate
 permitted sender hosts)
X-MS-Exchange-SenderADCheck: 1
X-Microsoft-Antispam: BCL:0;
X-Microsoft-Antispam-Message-Info: 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
X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DB8PR04MB5643.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFTY:;SFS:(4636009)(366004)(6486002)(5660300002)(44832011)(26005)(55236004)(66556008)(66946007)(66476007)(498600001)(6506007)(52116002)(4326008)(956004)(2616005)(2906002)(186003)(1076003)(16526019)(7416002)(6512007)(86362001)(110136005)(54906003)(6666004)(8936002)(1006002)(8676002)(110426005)(921003)(1121003);DIR:OUT;SFP:1101;
X-MS-Exchange-AntiSpam-MessageData: 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
X-OriginatorOrg: oss.nxp.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 1542e116-80f4-472a-7669-08d7f0f858e3
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 May 2020 13:29:33.2490
 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635
X-MS-Exchange-CrossTenant-MailboxType: HOSTED
X-MS-Exchange-CrossTenant-UserPrincipalName: MnU0xzIwNVY0Lxlw6ZnlK3RxRpSihpwpCRe81urLqirIlJ1N8OSYXdmYhrH210tsQuie3oY+flq5gLLA+GVrgQ==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB8PR04MB5596
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Define fwnode_phy_find_device() to iterate an mdiobus and find the
phy device of the provided phy fwnode. Additionally define
device_phy_find_device() to find phy device of provided device.

Define fwnode_get_phy_node() to get phy_node using named reference.

Signed-off-by: Calvin Johnson <calvin.johnson@oss.nxp.com>
---

Changes in v3:
  move fwnode APIs to appropriate place
  stubs fwnode APIs for !CONFIG_PHYLIB
  improve comment on function return condition.

Changes in v2:
  move phy code from base/property.c to net/phy/phy_device.c
  replace acpi & of code to get phy-handle with fwnode_find_reference

 drivers/net/phy/phy_device.c | 53 ++++++++++++++++++++++++++++++++++++
 include/linux/phy.h          | 19 +++++++++++++
 2 files changed, 72 insertions(+)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 7e1ddd5745d2..3e8224132218 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -31,6 +31,7 @@
 #include <linux/mdio.h>
 #include <linux/io.h>
 #include <linux/uaccess.h>
+#include <linux/property.h>
 
 MODULE_DESCRIPTION("PHY library");
 MODULE_AUTHOR("Andy Fleming");
@@ -2436,6 +2437,58 @@ static bool phy_drv_supports_irq(struct phy_driver *phydrv)
 	return phydrv->config_intr && phydrv->ack_interrupt;
 }
 
+/**
+ * fwnode_phy_find_device - Find phy_device on the mdiobus for the provided
+ * phy_fwnode.
+ * @phy_fwnode: Pointer to the phy's fwnode.
+ *
+ * If successful, returns a pointer to the phy_device with the embedded
+ * struct device refcount incremented by one, or NULL on failure.
+ */
+struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode)
+{
+	struct device *d;
+	struct mdio_device *mdiodev;
+
+	if (!phy_fwnode)
+		return NULL;
+
+	d = bus_find_device_by_fwnode(&mdio_bus_type, phy_fwnode);
+	if (d) {
+		mdiodev = to_mdio_device(d);
+		if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)
+			return to_phy_device(d);
+		put_device(d);
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL(fwnode_phy_find_device);
+
+/**
+ * device_phy_find_device - For the given device, get the phy_device
+ * @dev: Pointer to the given device
+ *
+ * Refer return conditions of fwnode_phy_find_device().
+ */
+struct phy_device *device_phy_find_device(struct device *dev)
+{
+	return fwnode_phy_find_device(dev_fwnode(dev));
+}
+EXPORT_SYMBOL_GPL(device_phy_find_device);
+
+/**
+ * fwnode_get_phy_node - Get the phy_node using the named reference.
+ * @fwnode: Pointer to fwnode from which phy_node has to be obtained.
+ *
+ * Refer return conditions of fwnode_find_reference().
+ */
+struct fwnode_handle *fwnode_get_phy_node(struct fwnode_handle *fwnode)
+{
+	return fwnode_find_reference(fwnode, "phy-handle", 0);
+}
+EXPORT_SYMBOL_GPL(fwnode_get_phy_node);
+
 /**
  * phy_probe - probe and init a PHY device
  * @dev: device to probe and init
diff --git a/include/linux/phy.h b/include/linux/phy.h
index e2bfb9240587..f2664730a331 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1141,10 +1141,29 @@ struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
 				     bool is_c45,
 				     struct phy_c45_device_ids *c45_ids);
 #if IS_ENABLED(CONFIG_PHYLIB)
+struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode);
+struct phy_device *device_phy_find_device(struct device *dev);
+struct fwnode_handle *fwnode_get_phy_node(struct fwnode_handle *fwnode);
 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45);
 int phy_device_register(struct phy_device *phy);
 void phy_device_free(struct phy_device *phydev);
 #else
+static inline
+struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode)
+{
+	return NULL;
+}
+
+static inline struct phy_device *device_phy_find_device(struct device *dev)
+{
+	return NULL;
+}
+
+struct fwnode_handle *fwnode_get_phy_node(struct fwnode_handle *fwnode)
+{
+	return NULL;
+}
+
 static inline
 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
 {
-- 
2.17.1