From 2b74e5be17d25fbca4be236a19efcd2ecae81cb2 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@armlinux.org.uk>
Date: Tue, 2 Jan 2018 10:58:53 +0000
Subject: [PATCH] net: phy: add phy_modify() accessor
Add phy_modify() convenience accessor to complement the mdiobus
counterpart.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/phy/phy-core.c | 23 +++++++++++++++++++++++
include/linux/phy.h | 1 +
2 files changed, 24 insertions(+)
diff --git a/drivers/net/phy/phy-core.c b/drivers/net/phy/phy-core.c
index 48e762bf6464..44d09b192014 100644
--- a/drivers/net/phy/phy-core.c
+++ b/drivers/net/phy/phy-core.c
@@ -349,6 +349,29 @@ int __phy_modify(struct phy_device *phydev, u32 regnum, u16 mask, u16 set)
}
EXPORT_SYMBOL_GPL(__phy_modify);
+/**
+ * phy_modify - Convenience function for modifying a given PHY register
+ * @phydev: the phy_device struct
+ * @regnum: register number to write
+ * @mask: bit mask of bits to clear
+ * @set: new value of bits set in mask to write to @regnum
+ *
+ * NOTE: MUST NOT be called from interrupt context,
+ * because the bus read/write functions may wait for an interrupt
+ * to conclude the operation.
+ */
+int phy_modify(struct phy_device *phydev, u32 regnum, u16 mask, u16 set)
+{
+ int ret;
+
+ mutex_lock(&phydev->mdio.bus->mdio_lock);
+ ret = __phy_modify(phydev, regnum, mask, set);
+ mutex_unlock(&phydev->mdio.bus->mdio_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phy_modify);
+
static int __phy_read_page(struct phy_device *phydev)
{
return phydev->drv->read_page(phydev);
diff --git a/include/linux/phy.h b/include/linux/phy.h
index af1a740dafd4..135aba5c3d39 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -762,6 +762,7 @@ static inline int __phy_write(struct phy_device *phydev, u32 regnum, u16 val)
}
int __phy_modify(struct phy_device *phydev, u32 regnum, u16 mask, u16 set);
+int phy_modify(struct phy_device *phydev, u32 regnum, u16 mask, u16 set);
/**
* phy_interrupt_is_valid - Convenience function for testing a given PHY irq
--
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