Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

[cascardo/linux.git] / arch / mips / include / asm / machine.h

diff --git a/arch/mips/include/asm/machine.h b/arch/mips/include/asm/machine.h
new file mode 100644 (file)
index 0000000..6b444cd
--- /dev/null
+++ b/arch/mips/include/asm/machine.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2016 Imagination Technologies
+ * Author: Paul Burton <paul.burton@imgtec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __MIPS_ASM_MACHINE_H__
+#define __MIPS_ASM_MACHINE_H__
+
+#include <linux/libfdt.h>
+#include <linux/of.h>
+
+struct mips_machine {
+       const struct of_device_id *matches;
+       const void *fdt;
+       bool (*detect)(void);
+       const void *(*fixup_fdt)(const void *fdt, const void *match_data);
+       unsigned int (*measure_hpt_freq)(void);
+};
+
+extern long __mips_machines_start;
+extern long __mips_machines_end;
+
+#define MIPS_MACHINE(name)                                             \
+       static const struct mips_machine __mips_mach_##name             \
+               __used __section(.mips.machines.init)
+
+#define for_each_mips_machine(mach)                                    \
+       for ((mach) = (struct mips_machine *)&__mips_machines_start;    \
+            (mach) < (struct mips_machine *)&__mips_machines_end;      \
+            (mach)++)
+
+/**
+ * mips_machine_is_compatible() - check if a machine is compatible with an FDT
+ * @mach: the machine struct to check
+ * @fdt: the FDT to check for compatibility with
+ *
+ * Check whether the given machine @mach is compatible with the given flattened
+ * device tree @fdt, based upon the compatibility property of the root node.
+ *
+ * Return: the device id matched if any, else NULL
+ */
+static inline const struct of_device_id *
+mips_machine_is_compatible(const struct mips_machine *mach, const void *fdt)
+{
+       const struct of_device_id *match;
+
+       if (!mach->matches)
+               return NULL;
+
+       for (match = mach->matches; match->compatible; match++) {
+               if (fdt_node_check_compatible(fdt, 0, match->compatible) == 0)
+                       return match;
+       }
+
+       return NULL;
+}
+
+#endif /* __MIPS_ASM_MACHINE_H__ */