May be i missed one piece of information. I thought i had that in my inline response but just realized i missed it. Device 0 ( FPGA 0), has custom logic which will detect the presence of the card 1 and card 2 and controls the power switches to the same. So If this makes fpga0 a "hotplug controller " then i can add the resource management logic/code for devices on card 1 and card 2 to this driver. Currently fpga_0 driver does some init for some of the devices on itself. can i follow any hp controller driver example to do the above or is there any specific driver/eg i can follow? noted your point on reading the spec for the details and i am on it. HW details: x86 ( Soc) -> pcie root port 0 -> Device 0 (FPGA_0 ) x86 ( Soc) -> pcie root port 1 -> [ pcie-switch_1_port 1 -> Device 1 (FPGA_1 ) ] x86 ( Soc) -> pcie root port 1 -> [ pcie-switch_1_port 2 -> Device 2 ] x86 ( Soc) -> pcie root port 2 -> pcie-switch_2_port 1 -> [ pcie- switch_3_port 1 -> Device 3 ( FPGA_2) ] x86 ( Soc) -> pcie root port 2 -> pcie-switch_2_port 1 -> [ pcie- switch_3_port 2 -> Device 4 ] Thanks for your patience Divakar -- To unsubscribe from this list: send the line "unsubscribe linux-hotplug" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
