Messages in this thread | | | Date | Fri, 21 Apr 2017 03:12:54 +0200 | From | Andrew Lunn <> | Subject | Re: [PATCH v3 net-next] mdio_bus: Issue GPIO RESET to PHYs. |
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On Thu, Apr 20, 2017 at 05:11:53PM +0300, Roger Quadros wrote: > Some boards [1] leave the PHYs at an invalid state > during system power-up or reset thus causing unreliability > issues with the PHY which manifests as PHY not being detected > or link not functional. To fix this, these PHYs need to be RESET > via a GPIO connected to the PHY's RESET pin. > > Some boards have a single GPIO controlling the PHY RESET pin of all > PHYs on the bus whereas some others have separate GPIOs controlling > individual PHY RESETs. > > In both cases, the RESET de-assertion cannot be done in the PHY driver > as the PHY will not probe till its reset is de-asserted. > So do the RESET de-assertion in the MDIO bus driver. > > [1] - am572x-idk, am571x-idk, a437x-idk > > Signed-off-by: Roger Quadros <rogerq@ti.com>
Hi Roger
Thanks for doing a generic solutions and the MDIO DT documentation.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Andrew
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