linux-kernel - [RFC PATCH] phylib: mdio: handle register/unregister/register sequence

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Date:	Thu, 22 Aug 2013 14:33:56 +0200
From:	Boris BREZILLON <b.brezillon@...rkiz.com>
To:	"David S. Miller" <davem@...emloft.net>,
	Mark Brown <broonie@...nel.org>,
	Nick Bowler <nbowler@...iptictech.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Grant Likely <grant.likely@...retlab.ca>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Boris BREZILLON <b.brezillon@...rkiz.com>
Subject: [RFC PATCH] phylib: mdio: handle register/unregister/register sequence

Hello,

This patch is a proposal to support the register/unregister/register
sequence on a given mdio bus.

I use the register/unregister/register sequence to add a fallback when the
of_mdiobus_register (this function calls mdiobus_register with phy_mask
set to ~0) does not register any phy device (because the device tree does
not define any phy).
In this case I call mdiobus_unregister and then call mdiobus_register with
a phy_mask set to 0 to trigger a full mdio bus scan.

I'm not sure this is the right way to do it (this is why I added RFC in the
subject).

Could someone help me figuring out what I should use to implement my fallback ?

1) use the register/unregister/register sequence
2) reimplement the "for (i = 0; i < PHY_MAX_ADDR; i++)" mdiobus_scan loop

Thanks.

Best Regards,
Boris

Boris BREZILLON (1):
  phylib: mdio: handle register/unregister/register sequence

 drivers/net/phy/mdio_bus.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

-- 
1.7.9.5

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