MIPS: BCM47xx: Support on-SoC bus in SPROM reading function

To support (extract) SPROM on Broadcom ARM devices we should separate
SPROM code and make it a separated module. We won't want to export
bcm47xx_fill_sprom symbol so we should support SoC SPROM in the standard
fallback function and then modify ssb to use it.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11355/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/bcm47xx/sprom.c b/arch/mips/bcm47xx/sprom.c
index 2d5c7a7f24bb943669d7c43fb66bee1482ff6412..e19c1b9b66970cae79bb4965a02764bcf690cb50 100644 (file)
--- a/arch/mips/bcm47xx/sprom.c
+++ b/arch/mips/bcm47xx/sprom.c
@@ -610,14 +610,18 @@ static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out)
 {
        char prefix[10];
 
-       if (bus->bustype == SSB_BUSTYPE_PCI) {
+       switch (bus->bustype) {
+       case SSB_BUSTYPE_SSB:
+               bcm47xx_fill_sprom(out, NULL, false);
+               return 0;
+       case SSB_BUSTYPE_PCI:
                memset(out, 0, sizeof(struct ssb_sprom));
                snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
                         bus->host_pci->bus->number + 1,
                         PCI_SLOT(bus->host_pci->devfn));
                bcm47xx_fill_sprom(out, prefix, false);
                return 0;
-       } else {
+       default:
                pr_warn("Unable to fill SPROM for given bustype.\n");
                return -EINVAL;
        }