[PATCH 4/8] MIPS: bcm47xx: read baordrev without prefix from sprom

[Hauke Mehrtens <hauke@hauke-m.de>]

When the boardrev with a prefix is not available, try to read it
without a prefix. This is based on code from the Broadcom SDK.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
 arch/mips/bcm47xx/sprom.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/bcm47xx/sprom.c b/arch/mips/bcm47xx/sprom.c
index a29d207..17282e0 100644
--- a/arch/mips/bcm47xx/sprom.c
+++ b/arch/mips/bcm47xx/sprom.c
@@ -165,6 +165,8 @@ static void bcm47xx_fill_sprom_r1234589(struct ssb_sprom 
*sprom,
                                        const char *prefix)
 {
        nvram_read_u16(prefix, NULL, "boardrev", &sprom->board_rev, 0);
+       if (!sprom->board_rev)
+               nvram_read_u16(NULL, NULL, "boardrev", &sprom->board_rev, 0);
        nvram_read_u16(prefix, NULL, "boardnum", &sprom->board_num, 0);
        nvram_read_u8(prefix, NULL, "ledbh0", &sprom->gpio0, 0xff);
        nvram_read_u8(prefix, NULL, "ledbh1", &sprom->gpio1, 0xff);
-- 
1.7.9.5