net: qcom/emac: Reduce timeout for mdio read/write
Currently mdio read/write takes around ~115us as the timeout between status check is set to 100us. By reducing the timeout to 1us mdio read/write takes ~15us to complete. This improves the link up event response. Signed-off-by: Hemanth Puranik <hpuranik@codeaurora.org> Acked-by: Timur Tabi <timur@codeaurora.org> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -47,6 +47,7 @@
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#define MDIO_CLK_25_28 7
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#define MDIO_WAIT_TIMES 1000
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#define MDIO_STATUS_DELAY_TIME 1
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static int emac_mdio_read(struct mii_bus *bus, int addr, int regnum)
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{
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@ -65,7 +66,7 @@ static int emac_mdio_read(struct mii_bus *bus, int addr, int regnum)
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if (readl_poll_timeout(adpt->base + EMAC_MDIO_CTRL, reg,
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!(reg & (MDIO_START | MDIO_BUSY)),
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100, MDIO_WAIT_TIMES * 100))
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MDIO_STATUS_DELAY_TIME, MDIO_WAIT_TIMES * 100))
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return -EIO;
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return (reg >> MDIO_DATA_SHFT) & MDIO_DATA_BMSK;
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@ -88,8 +89,8 @@ static int emac_mdio_write(struct mii_bus *bus, int addr, int regnum, u16 val)
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writel(reg, adpt->base + EMAC_MDIO_CTRL);
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if (readl_poll_timeout(adpt->base + EMAC_MDIO_CTRL, reg,
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!(reg & (MDIO_START | MDIO_BUSY)), 100,
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MDIO_WAIT_TIMES * 100))
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!(reg & (MDIO_START | MDIO_BUSY)),
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MDIO_STATUS_DELAY_TIME, MDIO_WAIT_TIMES * 100))
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return -EIO;
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return 0;
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