MIPS: move mips_{set,get}_machine_name() to a more generic place

Previously this functionality was only available to users of the mips_machine
api. Moving the code to prom.c allows us to also add a OF wrapper.

Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5164/

arch/mips/include/asm/mips_machine.h

@@ -42,13 +42,9 @@ extern long __mips_machines_end;
 #ifdef CONFIG_MIPS_MACHINE
 int  mips_machtype_setup(char *id) __init;
 void mips_machine_setup(void) __init;
-void mips_set_machine_name(const char *name) __init;
-char *mips_get_machine_name(void);
 #else
 static inline int mips_machtype_setup(char *id) { return 1; }
 static inline void mips_machine_setup(void) { }
-static inline void mips_set_machine_name(const char *name) { }
-static inline char *mips_get_machine_name(void) { return NULL; }
 #endif /* CONFIG_MIPS_MACHINE */
 
 #endif /* __ASM_MIPS_MACHINE_H */

arch/mips/include/asm/prom.h

@@ -48,4 +48,7 @@ extern void __dt_setup_arch(struct boot_param_header *bph);
 static inline void device_tree_init(void) { }
 #endif /* CONFIG_OF */
 
+extern char *mips_get_machine_name(void);
+extern void mips_set_machine_name(const char *name);
+
 #endif /* __ASM_PROM_H */

arch/mips/kernel/Makefile

@@ -5,7 +5,7 @@
 extra-y		:= head.o vmlinux.lds
 
 obj-y		+= cpu-probe.o branch.o entry.o genex.o irq.o process.o \
-		   ptrace.o reset.o setup.o signal.o syscall.o \
+		   prom.o ptrace.o reset.o setup.o signal.o syscall.o \
 		   time.o topology.o traps.o unaligned.o watch.o vdso.o
 
 ifdef CONFIG_FUNCTION_TRACER
@@ -86,8 +86,6 @@ obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
 obj-$(CONFIG_SPINLOCK_TEST)	+= spinlock_test.o
 obj-$(CONFIG_MIPS_MACHINE)	+= mips_machine.o
 
-obj-$(CONFIG_OF)		+= prom.o
-
 CFLAGS_cpu-bugs64.o	= $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o /dev/null -x c /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi)
 
 obj-$(CONFIG_HAVE_STD_PC_SERIAL_PORT)	+= 8250-platform.o

arch/mips/kernel/mips_machine.c

@@ -11,9 +11,9 @@
 #include <linux/slab.h>
 
 #include <asm/mips_machine.h>
+#include <asm/prom.h>
 
 static struct mips_machine *mips_machine __initdata;
-static char *mips_machine_name = "Unknown";
 
 #define for_each_machine(mach) \
 	for ((mach) = (struct mips_machine *)&__mips_machines_start; \
@@ -21,25 +21,6 @@ static char *mips_machine_name = "Unknown";
 	     (unsigned long)(mach) < (unsigned long)&__mips_machines_end; \
 	     (mach)++)
 
-__init void mips_set_machine_name(const char *name)
-{
-	char *p;
-
-	if (name == NULL)
-		return;
-
-	p = kstrdup(name, GFP_KERNEL);
-	if (!p)
-		pr_err("MIPS: no memory for machine_name\n");
-
-	mips_machine_name = p;
-}
-
-char *mips_get_machine_name(void)
-{
-	return mips_machine_name;
-}
-
 __init int mips_machtype_setup(char *id)
 {
 	struct mips_machine *mach;
@@ -79,7 +60,6 @@ __init void mips_machine_setup(void)
 		return;
 
 	mips_set_machine_name(mips_machine->mach_name);
-	pr_info("MIPS: machine is %s\n", mips_machine_name);
 
 	if (mips_machine->mach_setup)
 		mips_machine->mach_setup();

arch/mips/kernel/proc.c

@@ -12,7 +12,7 @@
 #include <asm/cpu-features.h>
 #include <asm/mipsregs.h>
 #include <asm/processor.h>
-#include <asm/mips_machine.h>
+#include <asm/prom.h>
 
 unsigned int vced_count, vcei_count;
 

arch/mips/kernel/prom.c

@@ -23,6 +23,23 @@
 #include <asm/page.h>
 #include <asm/prom.h>
 
+static char mips_machine_name[64] = "Unknown";
+
+__init void mips_set_machine_name(const char *name)
+{
+	if (name == NULL)
+		return;
+
+	strncpy(mips_machine_name, name, sizeof(mips_machine_name));
+	pr_info("MIPS: machine is %s\n", mips_get_machine_name());
+}
+
+char *mips_get_machine_name(void)
+{
+	return mips_machine_name;
+}
+
+#ifdef CONFIG_OF
 int __init early_init_dt_scan_memory_arch(unsigned long node,
 					  const char *uname, int depth,
 					  void *data)
@@ -50,6 +67,18 @@ void __init early_init_dt_setup_initrd_arch(unsigned long start,
 }
 #endif
 
+int __init early_init_dt_scan_model(unsigned long node,	const char *uname,
+				    int depth, void *data)
+{
+	if (!depth) {
+		char *model = of_get_flat_dt_prop(node, "model", NULL);
+
+		if (model)
+			mips_set_machine_name(model);
+	}
+	return 0;
+}
+
 void __init early_init_devtree(void *params)
 {
 	/* Setup flat device-tree pointer */
@@ -65,6 +94,9 @@ void __init early_init_devtree(void *params)
 	/* Scan memory nodes */
 	of_scan_flat_dt(early_init_dt_scan_root, NULL);
 	of_scan_flat_dt(early_init_dt_scan_memory_arch, NULL);
+
+	/* try to load the mips machine name */
+	of_scan_flat_dt(early_init_dt_scan_model, NULL);
 }
 
 void __init __dt_setup_arch(struct boot_param_header *bph)
@@ -79,3 +111,4 @@ void __init __dt_setup_arch(struct boot_param_header *bph)
 
 	early_init_devtree(initial_boot_params);
 }
+#endif