Messages in this thread | | | Date | Sun, 01 Nov 2015 16:51:51 -0500 (EST) | Subject | Re: [PATCH] net: smsc911x: Reset PHY during initialization | From | David Miller <> |
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From: Pavel Fedin <p.fedin@samsung.com> Date: Fri, 30 Oct 2015 10:06:19 +0300
> On certain hardware after software reboot the chip may get stuck and fail > to reinitialize during reset. This can be fixed by ensuring that PHY is > reset too. > > Old PHY resetting method required operational MDIO interface, therefore > the chip should have been already set up. In order to be able to function > during probe, it is changed to use PMT_CTRL register. > > The problem could be observed on SMDK5410 board. > > Signed-off-by: Pavel Fedin <p.fedin@samsung.com>
I'm pretty sure this is going to break the PHY loopback test.
This is such a tricky and fragile area to get right, therefore I want you to specifically guard any change in how PHY reset is done with tests against the specific chips that have the problem.
Furthermore, I want you to test whether this has any negative effects on the PHY loopback test.
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