net: phy: dp83867: perform soft reset and retain established link
[ Upstream commit da9ef50f ] Current logic is performing hard reset and causing the programmed registers to be wiped out. as per datasheet: https://www.ti.com/lit/ds/symlink/dp83867cr.pdf 8.6.26 Control Register (CTRL) do SW_RESTART to perform a reset not including the registers, If performed when link is already present, it will drop the link and trigger re-auto negotiation. Signed-off-by:Praneeth Bajjuri <praneeth@ti.com> Signed-off-by:
Geet Modi <geet.modi@ti.com> Reviewed-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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