From 3a03c08c821d580881ddc1b8a62f45f3801860de Mon Sep 17 00:00:00 2001 From: John Crispin Date: Fri, 4 Mar 2016 08:33:33 +0000 Subject: AR8216: improve mmd register access 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 SVN-Revision: 48914 --- target/linux/generic/files/drivers/net/phy/ar8216.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) (limited to 'target/linux/generic/files/drivers/net/phy/ar8216.c') diff --git a/target/linux/generic/files/drivers/net/phy/ar8216.c b/target/linux/generic/files/drivers/net/phy/ar8216.c index 817aca57d5..fc5627258d 100644 --- a/target/linux/generic/files/drivers/net/phy/ar8216.c +++ b/target/linux/generic/files/drivers/net/phy/ar8216.c @@ -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); -- cgit v1.2.3