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AR8216: improve mmd register access

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Combine all bus operations for one MMD access in one function.
Protecting all these bus operations with one lock also helps
to avoid potential issues due to bus operations intercepting
the register and data write.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>

SVN-Revision: 48914
This commit is contained in:
John Crispin
2016-03-04 08:33:33 +00:00
parent d3776bdfc9
commit 3a03c08c82
3 changed files with 17 additions and 13 deletions
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16
target/linux/generic/files/drivers/net/phy/ar8216.c
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@@ -308,25 +308,33 @@ ar8xxx_phy_dbg_write(struct ar8xxx_priv *priv, int phy_addr,
mutex_unlock(&bus->mdio_lock);
}
static inline void
ar8xxx_phy_mmd_prep(struct mii_bus *bus, int phy_addr, u16 addr, u16 reg)
{
bus->write(bus, phy_addr, MII_ATH_MMD_ADDR, addr);
bus->write(bus, phy_addr, MII_ATH_MMD_DATA, reg);
bus->write(bus, phy_addr, MII_ATH_MMD_ADDR, addr | 0x4000);
}
void
ar8xxx_phy_mmd_write(struct ar8xxx_priv *priv, int phy_addr, u16 addr, u16 data)
ar8xxx_phy_mmd_write(struct ar8xxx_priv *priv, int phy_addr, u16 addr, u16 reg, u16 data)
{
struct mii_bus *bus = priv->mii_bus;
mutex_lock(&bus->mdio_lock);
bus->write(bus, phy_addr, MII_ATH_MMD_ADDR, addr);
ar8xxx_phy_mmd_prep(bus, phy_addr, addr, reg);
bus->write(bus, phy_addr, MII_ATH_MMD_DATA, data);
mutex_unlock(&bus->mdio_lock);
}
u16
ar8xxx_phy_mmd_read(struct ar8xxx_priv *priv, int phy_addr, u16 addr)
ar8xxx_phy_mmd_read(struct ar8xxx_priv *priv, int phy_addr, u16 addr, u16 reg)
{
struct mii_bus *bus = priv->mii_bus;
u16 data;
mutex_lock(&bus->mdio_lock);
bus->write(bus, phy_addr, MII_ATH_MMD_ADDR, addr);
ar8xxx_phy_mmd_prep(bus, phy_addr, addr, reg);
data = bus->read(bus, phy_addr, MII_ATH_MMD_DATA);
mutex_unlock(&bus->mdio_lock);