powerpc/fsl: use of_iomap() for rstcr mapping

The rstcr register mapping code was written sometime ago before
of_iomap() existed.  We can use it and clean up the code a bit
and get rid of one user of get_immrbase() in the process.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 4 insertions, 10 deletions

diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c
index 5c64ccd402e2..95dbc643c4fc 100644
--- a/arch/powerpc/sysdev/fsl_soc.c
+++ b/arch/powerpc/sysdev/fsl_soc.c
@@ -379,16 +379,10 @@ static int __init setup_rstcr(void)
         struct device_node *np;
         np = of_find_node_by_name(NULL, "global-utilities");
         if ((np && of_get_property(np, "fsl,has-rstcr", NULL))) {
-                const u32 *prop = of_get_property(np, "reg", NULL);
-                if (prop) {
-                        /* map reset control register
-                         * 0xE00B0 is offset of reset control register
-                         */
-                        rstcr = ioremap(get_immrbase() + *prop + 0xB0, 0xff);
-                        if (!rstcr)
-                                printk (KERN_EMERG "Error: reset control "
-                                                "register not mapped!\n");
-                }
+                rstcr = of_iomap(np, 0) + 0xb0;
+                if (!rstcr)
+                        printk (KERN_EMERG "Error: reset control register "
+                                        "not mapped!\n");
         } else
                 printk (KERN_INFO "rstcr compatible register does not exist!\n");
         if (np)