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authorGrygorii Strashko <grygorii.strashko@ti.com>2023-05-10 18:21:39 +0530
committerDavid S. Miller <davem@davemloft.net>2023-05-12 08:44:43 +0100
commit0b01db274028f5acd207332686ffc92ac77491ac (patch)
treea46bbc755bcf0ee18e5339d8f7447f76697f04ff /CREDITS
parentf816b9829b19394d318e01953aa3b2721bca040d (diff)
net: phy: dp83867: add w/a for packet errors seen with short cables
Introduce the W/A for packet errors seen with short cables (<1m) between two DP83867 PHYs. The W/A recommended by DM requires FFE Equalizer Configuration tuning by writing value 0x0E81 to DSP_FFE_CFG register (0x012C), surrounded by hard and soft resets as follows: write_reg(0x001F, 0x8000); //hard reset write_reg(DSP_FFE_CFG, 0x0E81); write_reg(0x001F, 0x4000); //soft reset Since DP83867 PHY DM says "Changing this register to 0x0E81, will not affect Long Cable performance.", enable the W/A by default. Fixes: 2a10154abcb7 ("net: phy: dp83867: Add TI dp83867 phy") Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com> Reviewed-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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