net: mdio: ipq8064: enlarge sleep after read/write operation
With the use of the qca8k dsa driver, some problem arised related to port status detection. With a load on a specific port (for example a simple speed test), the driver starts to behave in a strange way and garbage data is produced. To address this, enlarge the sleep delay and address a bug for the reg offset 31 that require additional delay for this specific reg. Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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77091933e4
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@ -65,7 +65,7 @@ ipq8064_mdio_read(struct mii_bus *bus, int phy_addr, int reg_offset)
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((reg_offset << MII_REG_SHIFT) & MII_REG_MASK);
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regmap_write(priv->base, MII_ADDR_REG_ADDR, miiaddr);
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usleep_range(8, 10);
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usleep_range(10, 13);
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err = ipq8064_mdio_wait_busy(priv);
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if (err)
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@ -91,7 +91,14 @@ ipq8064_mdio_write(struct mii_bus *bus, int phy_addr, int reg_offset, u16 data)
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((reg_offset << MII_REG_SHIFT) & MII_REG_MASK);
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regmap_write(priv->base, MII_ADDR_REG_ADDR, miiaddr);
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usleep_range(8, 10);
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/* For the specific reg 31 extra time is needed or the next
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* read will produce garbage data.
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*/
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if (reg_offset == 31)
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usleep_range(30, 43);
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else
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usleep_range(10, 13);
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return ipq8064_mdio_wait_busy(priv);
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}
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