* Roger Quadros <rogerq@xxxxxx> [160429 03:10]: > On 26/04/16 18:10, Tony Lindgren wrote: > > I guess for now if no runtime detection is possible in the kernel. > > There are 2 ways to detect them mode > 1) Enabe GPIO rising edge detect interrupt and reset the Ethernet PHY > 2) read a PHY register over MDIO bus > > I'm not very sure where this can be done in the kernel. We already have some PHY detection over MDIO detection in place, so that's probably the most generic solution. > Even if there is some place to do the detection, how do we go about reconfiguring the > device tree? You may not need to, you can have several named pin states: pinctrl-names = "default", "phy-foo", "phy-bar"; pinctrl-0 = <&cpsw_default>; pinctrl-1 = <&cpsw_phy_foo>; pinctrl-2 = <&cpsw_phy_bar>; ... Then have the common pins in cpsw_default, and manually enable the other pinctrl groups based on the detection. We already have that going on in am335x-bone-common.dtsi with the &mac entry for cpsw. But maybe you have other detection issues too beyond setting the pins? Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
