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ARM: Kirkwood: Support basic hotplug for PCI-E

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Unconditionally register the PCI-E bus, even if the link is currently
down. When the link is brought up the bus can be scanned through
/sys/bus/pci/rescan or otherwise. Since the HW has no interrupt for
link up, userspace will have to take care of the timing.

An earlier version of this was contingent on CONFIG_HOTPLUG, but
that is being removed from the kernel.

This also fixes printing the link up/down message to be displayed
on one line (structured logging broke this?)

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Jason Gunthorpe 2012-11-21 11:25:28 -07:00 committed by Jason Cooper
parent 183cadc962
commit b73690c8f8
1 changed files with 3 additions and 7 deletions
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10
arch/arm/mach-kirkwood/pcie.c
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@ -247,13 +247,9 @@ static struct hw_pci kirkwood_pci __initdata = {
static void __init add_pcie_port(int index, void __iomem *base) static void __init add_pcie_port(int index, void __iomem *base)
{ {
pr_info("Kirkwood PCIe port %d: ", index); pcie_port_map[num_pcie_ports++] = index;
pr_info("Kirkwood PCIe port %d: link %s\n", index,
if (orion_pcie_link_up(base)) { orion_pcie_link_up(base) ? "up" : "down");
pr_info("link up\n");
pcie_port_map[num_pcie_ports++] = index;
} else
pr_info("link down, ignoring\n");
} }
void __init kirkwood_pcie_init(unsigned int portmask) void __init kirkwood_pcie_init(unsigned int portmask)