powerpc/powernv: Remove pnv_pci_probe_mode()

The callback (ppc_md.pci_probe_mode()) is used to determine if the
child PCI devices of the indicated PCI bus should be probed from
device-tree or hardware. On PowerNV platform, we always expect
probing PCI devices from hardware, which is PowerPC PCI core's
default behaviour. Also, the callback had some delay implemented
based on PHB's device node property "reset-clear-timestamp", which
wasn't exported from skiboot. So we don't need this function and
it's safe to remove it.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c
index 4945e87f12dca58b44a6e98c27b5dcde1f12a054..e69142f4af089cf986dd84f3fb2731ae705cf1f2 100644 (file)
--- a/arch/powerpc/platforms/powernv/pci.c
+++ b/arch/powerpc/platforms/powernv/pci.c
@@ -781,35 +781,6 @@ static void pnv_p7ioc_rc_quirk(struct pci_dev *dev)
 }
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_IBM, 0x3b9, pnv_p7ioc_rc_quirk);
 
-static int pnv_pci_probe_mode(struct pci_bus *bus)
-{
-       struct pci_controller *hose = pci_bus_to_host(bus);
-       const __be64 *tstamp;
-       u64 now, target;
-
-
-       /* We hijack this as a way to ensure we have waited long
-        * enough since the reset was lifted on the PCI bus
-        */
-       if (bus != hose->bus)
-               return PCI_PROBE_NORMAL;
-       tstamp = of_get_property(hose->dn, "reset-clear-timestamp", NULL);
-       if (!tstamp || !*tstamp)
-               return PCI_PROBE_NORMAL;
-
-       now = mftb() / tb_ticks_per_usec;
-       target = (be64_to_cpup(tstamp) / tb_ticks_per_usec)
-               + PCI_RESET_DELAY_US;
-
-       pr_devel("pci %04d: Reset target: 0x%llx now: 0x%llx\n",
-                hose->global_number, target, now);
-
-       if (now < target)
-               msleep((target - now + 999) / 1000);
-
-       return PCI_PROBE_NORMAL;
-}
-
 void __init pnv_pci_init(void)
 {
        struct device_node *np;
@@ -856,7 +827,6 @@ void __init pnv_pci_init(void)
        ppc_md.tce_build_rm = pnv_tce_build_rm;
        ppc_md.tce_free_rm = pnv_tce_free_rm;
        ppc_md.tce_get = pnv_tce_get;
-       ppc_md.pci_probe_mode = pnv_pci_probe_mode;
        set_pci_dma_ops(&dma_iommu_ops);
 
        /* Configure MSIs */