[PATCH net-next 1/7] net: phy: mdio-bcm-unimac: factor busy polling loop
From: Florian Fainelli <f.fainelli@gmail.com>
Date: 2017-07-31 19:04:40
Subsystem:
ethernet phy library, networking drivers, the rest · Maintainers:
Andrew Lunn, Heiner Kallweit, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Factor the code that does the busy polling on the MDIO_BUSY bit since we will have different code-paths for for completion depending on whether we are using interrupts or polling. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> --- drivers/net/phy/mdio-bcm-unimac.c | 43 +++++++++++++++++++-------------------- 1 file changed, 21 insertions(+), 22 deletions(-)
diff --git a/drivers/net/phy/mdio-bcm-unimac.c b/drivers/net/phy/mdio-bcm-unimac.c
index 34395230ce70..226fdccfa1a8 100644
--- a/drivers/net/phy/mdio-bcm-unimac.c
+++ b/drivers/net/phy/mdio-bcm-unimac.c@@ -57,10 +57,26 @@ static inline unsigned int unimac_mdio_busy(struct unimac_mdio_priv *priv) return __raw_readl(priv->base + MDIO_CMD) & MDIO_START_BUSY; } +static int unimac_mdio_poll(struct unimac_mdio_priv *priv) +{ + unsigned int timeout = 1000; + + do { + if (!unimac_mdio_busy(priv)) + return 0; + + usleep_range(1000, 2000); + } while (timeout--); + + if (!timeout) + return -ETIMEDOUT; + + return 0; +} + static int unimac_mdio_read(struct mii_bus *bus, int phy_id, int reg) { struct unimac_mdio_priv *priv = bus->priv; - unsigned int timeout = 1000; u32 cmd; /* Prepare the read operation */
@@ -70,15 +86,9 @@ static int unimac_mdio_read(struct mii_bus *bus, int phy_id, int reg) /* Start MDIO transaction */ unimac_mdio_start(priv); - do { - if (!unimac_mdio_busy(priv)) - break; - - usleep_range(1000, 2000); - } while (timeout--); - - if (!timeout) - return -ETIMEDOUT; + ret = unimac_mdio_poll(priv); + if (ret) + return ret; cmd = __raw_readl(priv->base + MDIO_CMD);
@@ -97,7 +107,6 @@ static int unimac_mdio_write(struct mii_bus *bus, int phy_id, int reg, u16 val) { struct unimac_mdio_priv *priv = bus->priv; - unsigned int timeout = 1000; u32 cmd; /* Prepare the write operation */
@@ -107,17 +116,7 @@ static int unimac_mdio_write(struct mii_bus *bus, int phy_id, unimac_mdio_start(priv); - do { - if (!unimac_mdio_busy(priv)) - break; - - usleep_range(1000, 2000); - } while (timeout--); - - if (!timeout) - return -ETIMEDOUT; - - return 0; + return unimac_mdio_poll(priv); } /* Workaround for integrated BCM7xxx Gigabit PHYs which have a problem with
--
2.9.3