powerpc/nvram: Search for nvram using compatible

As well as searching for nodes with type = "nvram", search for nodes
that have compatible = "nvram". This can't be converted into a single
call to of_find_compatible_node() with a non-NULL type, because that
searches for a node that has _both_ type & compatible = "nvram".

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/powerpc/sysdev/mmio_nvram.c b/arch/powerpc/sysdev/mmio_nvram.c
index 20732420906..ddc877a3a23 100644
--- a/arch/powerpc/sysdev/mmio_nvram.c
+++ b/arch/powerpc/sysdev/mmio_nvram.c
@@ -115,6 +115,8 @@ int __init mmio_nvram_init(void)
         int ret;
 
         nvram_node = of_find_node_by_type(NULL, "nvram");
+        if (!nvram_node)
+                nvram_node = of_find_compatible_node(NULL, NULL, "nvram");
         if (!nvram_node) {
                 printk(KERN_WARNING "nvram: no node found in device-tree\n");
                 return -ENODEV;