MIPS: Create a helper function for DT setup

A couple of platforms register two buses and call of_platform_populate().
Move this into a common function to reduce duplication.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Cc: f.fainelli@gmail.com
Cc: mbizon@freebox.fr
Cc: jogo@openwrt.org
Cc: jfraser@broadcom.com
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8167/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

4 files changed, 22 insertions, 22 deletions

diff --git a/arch/mips/include/asm/prom.h b/arch/mips/include/asm/prom.h
index a9494c0141fb..eaa26270a5e5 100644
--- a/arch/mips/include/asm/prom.h
+++ b/arch/mips/include/asm/prom.h
@@ -22,6 +22,7 @@ extern void device_tree_init(void);
 struct boot_param_header;
 
 extern void __dt_setup_arch(void *bph);
+extern int __dt_register_buses(const char *bus0, const char *bus1);
 
 #define dt_setup_arch(sym)                                              \
 ({                                                                      \
diff --git a/arch/mips/kernel/prom.c b/arch/mips/kernel/prom.c
index 5d39bb85bf35..452d4350ce42 100644
--- a/arch/mips/kernel/prom.c
+++ b/arch/mips/kernel/prom.c
@@ -16,6 +16,7 @@
 #include <linux/debugfs.h>
 #include <linux/of.h>
 #include <linux/of_fdt.h>
+#include <linux/of_platform.h>
 
 #include <asm/page.h>
 #include <asm/prom.h>
@@ -54,4 +55,21 @@ void __init __dt_setup_arch(void *bph)
 
         mips_set_machine_name(of_flat_dt_get_machine_name());
 }
+
+int __init __dt_register_buses(const char *bus0, const char *bus1)
+{
+        static struct of_device_id of_ids[3];
+
+        if (!of_have_populated_dt())
+                panic("device tree not present");
+
+        strlcpy(of_ids[0].compatible, bus0, sizeof(of_ids[0].compatible));
+        strlcpy(of_ids[1].compatible, bus1, sizeof(of_ids[1].compatible));
+
+        if (of_platform_populate(NULL, of_ids, NULL, NULL))
+                panic("failed to populate DT");
+
+        return 0;
+}
+
 #endif
diff --git a/arch/mips/lantiq/prom.c b/arch/mips/lantiq/prom.c
index 7447d322d14e..758970e3815b 100644
--- a/arch/mips/lantiq/prom.c
+++ b/arch/mips/lantiq/prom.c
@@ -97,16 +97,7 @@ void __init prom_init(void)
 
 int __init plat_of_setup(void)
 {
-        static struct of_device_id of_ids[3];
-
-        if (!of_have_populated_dt())
-                panic("device tree not present");
-
-        strlcpy(of_ids[0].compatible, soc_info.compatible,
-                sizeof(of_ids[0].compatible));
-        strncpy(of_ids[1].compatible, "simple-bus",
-                sizeof(of_ids[1].compatible));
-        return of_platform_populate(NULL, of_ids, NULL, NULL);
+        return __dt_register_buses(soc_info.compatible, "simple-bus");
 }
 
 arch_initcall(plat_of_setup);
diff --git a/arch/mips/ralink/of.c b/arch/mips/ralink/of.c
index 7c4598cb6de8..f68115fd98ef 100644
--- a/arch/mips/ralink/of.c
+++ b/arch/mips/ralink/of.c
@@ -74,19 +74,9 @@ void __init plat_mem_setup(void)
 
 static int __init plat_of_setup(void)
 {
-        static struct of_device_id of_ids[3];
-        int len = sizeof(of_ids[0].compatible);
+        __dt_register_buses(soc_info.compatible, "palmbus");
 
-        if (!of_have_populated_dt())
-                panic("device tree not present");
-
-        strlcpy(of_ids[0].compatible, soc_info.compatible, len);
-        strlcpy(of_ids[1].compatible, "palmbus", len);
-
-        if (of_platform_populate(NULL, of_ids, NULL, NULL))
-                panic("failed to populate DT");
-
-        /* make sure ithat the reset controller is setup early */
+        /* make sure that the reset controller is setup early */
         ralink_rst_init();
 
         return 0;