[MIPS] TXx9: Add some pci options

Add pci options for backplane type, clock selection, error handling,
timeout values.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/arch/mips/pci/ops-tx4927.c b/arch/mips/pci/ops-tx4927.c
index 6d844094ef5d..038e311b069d 100644
--- a/arch/mips/pci/ops-tx4927.c
+++ b/arch/mips/pci/ops-tx4927.c
@@ -194,6 +194,28 @@ static struct {
         .gbwc = 0xfe0,  /* 4064 GBUSCLK for CCFG.GTOT=0b11 */
 };
 
+char *__devinit tx4927_pcibios_setup(char *str)
+{
+        unsigned long val;
+
+        if (!strncmp(str, "trdyto=", 7)) {
+                if (strict_strtoul(str + 7, 0, &val) == 0)
+                        tx4927_pci_opts.trdyto = val;
+                return NULL;
+        }
+        if (!strncmp(str, "retryto=", 8)) {
+                if (strict_strtoul(str + 8, 0, &val) == 0)
+                        tx4927_pci_opts.retryto = val;
+                return NULL;
+        }
+        if (!strncmp(str, "gbwc=", 5)) {
+                if (strict_strtoul(str + 5, 0, &val) == 0)
+                        tx4927_pci_opts.gbwc = val;
+                return NULL;
+        }
+        return str;
+}
+
 void __init tx4927_pcic_setup(struct tx4927_pcic_reg __iomem *pcicptr,
                               struct pci_controller *channel, int extarb)
 {