netdev - [PATCH v4 1/2] net: phy: add API to read 802.3-c45 IDs

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Date:   Mon, 28 Jun 2021 22:29:45 +0800
From:   Xu Liang <lxu@...linear.com>
To:     <andrew@...n.ch>, <hkallweit1@...il.com>, <netdev@...r.kernel.org>,
        <davem@...emloft.net>, <kuba@...nel.org>,
        <vee.khee.wong@...ux.intel.com>
CC:     <linux@...linux.org.uk>, <hmehrtens@...linear.com>,
        <tmohren@...linear.com>, <mohammad.athari.ismail@...el.com>,
        Xu Liang <lxu@...linear.com>
Subject: [PATCH v4 1/2] net: phy: add API to read 802.3-c45 IDs

Add API to read 802.3-c45 IDs so that C22/C45 mixed device can use
C45 APIs without failing ID checks.

Signed-off-by: Xu Liang <lxu@...linear.com>
---
 drivers/net/phy/phy_device.c | 14 ++++++++++++++
 include/linux/phy.h          |  1 +
 2 files changed, 15 insertions(+)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 0a2d8bedf73d..c8969642076f 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -935,6 +935,20 @@ void phy_device_remove(struct phy_device *phydev)
 }
 EXPORT_SYMBOL(phy_device_remove);
 
+/**
+ * get_phy_c45_ids - Read 802.3-c45 IDs for phy device.
+ * @phydev: phy_device structure to read 802.3-c45 IDs
+ *
+ * Returns zero on success, %-EIO on bus access error, or %-ENODEV if
+ * the "devices in package" is invalid.
+ */
+int phy_get_c45_ids(struct phy_device *phydev)
+{
+	return get_phy_c45_ids(phydev->mdio.bus, phydev->mdio.addr,
+			       &phydev->c45_ids);
+}
+EXPORT_SYMBOL(phy_get_c45_ids);
+
 /**
  * phy_find_first - finds the first PHY device on the bus
  * @bus: the target MII bus
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 852743f07e3e..e46b23a2113b 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1391,6 +1391,7 @@ static inline int phy_device_register(struct phy_device *phy)
 static inline void phy_device_free(struct phy_device *phydev) { }
 #endif /* CONFIG_PHYLIB */
 void phy_device_remove(struct phy_device *phydev);
+int phy_get_c45_ids(struct phy_device *phydev);
 int phy_init_hw(struct phy_device *phydev);
 int phy_suspend(struct phy_device *phydev);
 int phy_resume(struct phy_device *phydev);
-- 
2.17.1