powerpc/mpic: Don't open-code dcr_resource_start

Don't open-code the OpenFirmware "dcr-reg" property lookup trying to map
DCR resources.  This makes the code a bit easier to read.

Signed-off-by: Kyle Moffett <Kyle.D.Moffett@boeing.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 6d42ad1..1e7584b 100644 (file)
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -319,11 +319,8 @@ static void _mpic_map_dcr(struct mpic *mpic, struct device_node *node,
                          struct mpic_reg_bank *rb,
                          unsigned int offset, unsigned int size)
 {
-       const u32 *dbasep;
-
-       dbasep = of_get_property(node, "dcr-reg", NULL);
-
-       rb->dhost = dcr_map(node, *dbasep + offset, size);
+       phys_addr_t phys_addr = dcr_resource_start(node, 0);
+       rb->dhost = dcr_map(mpic->node, phys_addr + offset, size);
        BUG_ON(!DCR_MAP_OK(rb->dhost));
 }