Commit b3bea15d authored by Kumar Gala's avatar Kumar Gala
Browse files

[POWERPC] bootwrapper: Add find_node_by_compatible 



Add the ability to find a device node by just what its compatible with.
This is useful in cases that we don't have a prop to find the node with.

Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
parent 03a16b27

arch/powerpc/boot/libfdt-wrapper.c

+9 −0
Original line number Diff line number Diff line
@@ -133,6 +133,14 @@ static void *fdt_wrapper_find_node_by_prop_value(const void *prev, 
	return offset_devp(offset);

}



static void *fdt_wrapper_find_node_by_compatible(const void *prev,

						 const char *val)

{

	int offset = fdt_node_offset_by_compatible(fdt, devp_offset_find(prev),

	                                           val);

	return offset_devp(offset);

}



static char *fdt_wrapper_get_path(const void *devp, char *buf, int len)

{

	int rc;
@@ -164,6 +172,7 @@ void fdt_init(void *blob) 
	dt_ops.get_parent = fdt_wrapper_get_parent;

	dt_ops.create_node = fdt_wrapper_create_node;

	dt_ops.find_node_by_prop_value = fdt_wrapper_find_node_by_prop_value;

	dt_ops.find_node_by_compatible = fdt_wrapper_find_node_by_compatible;

	dt_ops.get_path = fdt_wrapper_get_path;

	dt_ops.finalize = fdt_wrapper_finalize;

arch/powerpc/boot/ops.h

+11 −0
Original line number Diff line number Diff line
@@ -46,6 +46,8 @@ struct dt_ops { 
	void *(*find_node_by_prop_value)(const void *prev,

	                                 const char *propname,

	                                 const char *propval, int proplen);

	void *(*find_node_by_compatible)(const void *prev,

	                                 const char *compat);

	unsigned long (*finalize)(void);

	char *(*get_path)(const void *phandle, char *buf, int len);

};
@@ -172,6 +174,15 @@ static inline void *find_node_by_alias(const char *alias) 
	return NULL;

}



static inline void *find_node_by_compatible(const void *prev,

                                            const char *compat)

{

	if (dt_ops.find_node_by_compatible)

		return dt_ops.find_node_by_compatible(prev, compat);



	return NULL;

}



void dt_fixup_memory(u64 start, u64 size);

void dt_fixup_cpu_clocks(u32 cpufreq, u32 tbfreq, u32 busfreq);

void dt_fixup_clock(const char *path, u32 freq);