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Diffstat (limited to 'arch/powerpc/kernel/legacy_serial.c')
-rw-r--r--arch/powerpc/kernel/legacy_serial.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c
index 61dd17449dd..4d96e1db55e 100644
--- a/arch/powerpc/kernel/legacy_serial.c
+++ b/arch/powerpc/kernel/legacy_serial.c
@@ -33,13 +33,14 @@ static struct legacy_serial_info {
phys_addr_t taddr;
} legacy_serial_infos[MAX_LEGACY_SERIAL_PORTS];
-static struct __initdata of_device_id parents[] = {
+static struct __initdata of_device_id legacy_serial_parents[] = {
{.type = "soc",},
{.type = "tsi-bridge",},
{.type = "opb", },
{.compatible = "ibm,opb",},
{.compatible = "simple-bus",},
{.compatible = "wrs,epld-localbus",},
+ {},
};
static unsigned int legacy_serial_count;
@@ -136,6 +137,11 @@ static int __init add_legacy_soc_port(struct device_node *np,
if (of_get_property(np, "clock-frequency", NULL) == NULL)
return -1;
+ /* if reg-shift or offset, don't try to use it */
+ if ((of_get_property(np, "reg-shift", NULL) != NULL) ||
+ (of_get_property(np, "reg-offset", NULL) != NULL))
+ return -1;
+
/* if rtas uses this device, don't try to use it as well */
if (of_get_property(np, "used-by-rtas", NULL) != NULL)
return -1;
@@ -322,7 +328,7 @@ void __init find_legacy_serial_ports(void)
struct device_node *parent = of_get_parent(np);
if (!parent)
continue;
- if (of_match_node(parents, parent) != NULL) {
+ if (of_match_node(legacy_serial_parents, parent) != NULL) {
index = add_legacy_soc_port(np, np);
if (index >= 0 && np == stdout)
legacy_serial_console = index;