MIPS: BCM47xx: Support SPROM prefixes on other platforms

BCM47XX platform has specific PCI setup because all buses share the same
domain. It's different e.g. on ARM ARCH_BCM_5301X where each PCI bus
gets its own domain (they are handled by iProc PCIe controller driver).

As we want to make SPROM driver more generic, let's add an exception for
BCM47xx. It was tested on BCM4706 (MIPS) and BCM4708A0 (ARM).

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11969/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/bcm47xx/sprom.c b/arch/mips/bcm47xx/sprom.c
index a7e569c7968ea7e8bc1a1ce3e629fc54cc2710ee..959c145a0a2c1654d1ac3b58a98db92ef435a713 100644 (file)
--- a/arch/mips/bcm47xx/sprom.c
+++ b/arch/mips/bcm47xx/sprom.c
@@ -666,9 +666,15 @@ static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out)
        switch (bus->hosttype) {
        case BCMA_HOSTTYPE_PCI:
                memset(out, 0, sizeof(struct ssb_sprom));
-               snprintf(buf, sizeof(buf), "pci/%u/%u/",
-                        bus->host_pci->bus->number + 1,
-                        PCI_SLOT(bus->host_pci->devfn));
+               /* On BCM47XX all PCI buses share the same domain */
+               if (config_enabled(CONFIG_BCM47XX))
+                       snprintf(buf, sizeof(buf), "pci/%u/%u/",
+                                bus->host_pci->bus->number + 1,
+                                PCI_SLOT(bus->host_pci->devfn));
+               else
+                       snprintf(buf, sizeof(buf), "pci/%u/%u/",
+                                pci_domain_nr(bus->host_pci->bus) + 1,
+                                bus->host_pci->bus->number);
                bcm47xx_sprom_apply_prefix_alias(buf, sizeof(buf));
                prefix = buf;
                break;