Hi,
On Wed, Jan 27, 2016 at 01:11:38AM +0100, Andrew Lunn wrote:
> Some phy nodes list a compatible value indicating the PHY make/model.
> This is never used to match the device to the driver. However it does
> confuse the code to separate a PHY from a generic MDIO device like a
> switch. Generic MDIO devices must have a compatible value, PHYs can
> list clause 22 or 45, but nothing else.
>
> Issue a warning if we find a compatible value known on the whitelist,
> and say it is a PHY.
>
> Fixes: a9049e0c513c ("mdio: Add support for mdio drivers.")
> Reported-by: Aaro Koskinen <aaro.koski...@nokia.com>
> Reported-by: Olof Johansson <o...@lixom.net>
> Signed-off-by: Andrew Lunn <and...@lunn.ch>
Tested-by: Aaro Koskinen <aaro.koski...@nokia.com>
A.
> ---
> drivers/of/of_mdio.c | 27 +++++++++++++++++++++++++++
> 1 file changed, 27 insertions(+)
>
> diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
> index b5aa004a24b6..26c245041493 100644
> --- a/drivers/of/of_mdio.c
> +++ b/drivers/of/of_mdio.c
> @@ -143,11 +143,31 @@ int of_mdio_parse_addr(struct device *dev, const struct
> device_node *np)
> }
> EXPORT_SYMBOL(of_mdio_parse_addr);
>
> +/* The following is a list of PHY compatible strings which appear in
> + * some DTBs. The compatible string is never matched against a PHY
> + * driver, so is pointless. We only expect devices which are not PHYs
> + * to have a compatible string, so they can be matched to an MDIO
> + * driver. Encourage users to upgrade there DT blobs to remove these.
> + */
> +static const struct of_device_id whitelist_phys[] = {
> + { .compatible = "brcm,40nm-ephy" },
> + { .compatible = "marvell,88E1111", },
> + { .compatible = "marvell,88e1116", },
> + { .compatible = "marvell,88e1118", },
> + { .compatible = "marvell,88e1149r", },
> + { .compatible = "marvell,88e1310", },
> + { .compatible = "marvell,88E1510", },
> + { .compatible = "marvell,88E1514", },
> + { .compatible = "moxa,moxart-rtl8201cp", },
> + {}
> +};
> +
> /*
> * Return true if the child node is for a phy. It must either:
> * o Compatible string of "ethernet-phy-idX.X"
> * o Compatible string of "ethernet-phy-ieee802.3-c45"
> * o Compatible string of "ethernet-phy-ieee802.3-c22"
> + * o In the white list above (and issue a warning)
> * o No compatibility string
> *
> * A device which is not a phy is expected to have a compatible string
> @@ -166,6 +186,13 @@ static bool of_mdiobus_child_is_phy(struct device_node
> *child)
> if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c22"))
> return true;
>
> + if (of_match_node(whitelist_phys, child)) {
> + pr_warn(FW_WARN
> + "%s: Whitelisted compatible string. Please remove\n",
> + child->full_name);
> + return true;
> + }
> +
> if (!of_find_property(child, "compatible", NULL))
> return true;
>
> --
> 2.7.0
>
