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libfdt: Add helpers for 64-bit integer properties

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In device trees in the world, properties consisting of a single 64-bit
integer are not as common as those consisting of a single 32-bit, cell
sized integer, but they're common enough that they're worth including
convenience functions for.

This patch adds helper wrappers of fdt_setprop_inplace(), fdt_setprop() and
fdt_appendprop() for handling 64-bit integer quantities in properties.  For
better consistency with the names of these new *_u64() functions we also
add *_u32() functions as alternative names for the existing *_cell()
functions handling 32-bit integers.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
David Gibson 2012-08-27 19:39:00 -05:00 committed by Gerald Van Baren
parent 36ad18a6db
commit 24fa0e588e
1 changed files with 170 additions and 23 deletions
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185
include/libfdt.h
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@ -852,17 +852,17 @@ int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
const void *val, int len);
/**
* fdt_setprop_inplace_cell - change the value of a single-cell property
* fdt_setprop_inplace_u32 - change the value of a 32-bit integer property
* @fdt: pointer to the device tree blob
* @nodeoffset: offset of the node whose property to change
* @name: name of the property to change
* @val: cell (32-bit integer) value to replace the property with
* @val: 32-bit integer value to replace the property with
*
* fdt_setprop_inplace_cell() replaces the value of a given property
* with the 32-bit integer cell value in val, converting val to
* big-endian if necessary. This function cannot change the size of a
* property, and so will only work if the property already exists and
* has length 4.
* fdt_setprop_inplace_u32() replaces the value of a given property
* with the 32-bit integer value in val, converting val to big-endian
* if necessary. This function cannot change the size of a property,
* and so will only work if the property already exists and has length
* 4.
*
* This function will alter only the bytes in the blob which contain
* the given property value, and will not alter or move any other part
@ -879,13 +879,59 @@ int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
* -FDT_ERR_BADSTRUCTURE,
* -FDT_ERR_TRUNCATED, standard meanings
*/
static inline int fdt_setprop_inplace_cell(void *fdt, int nodeoffset,
static inline int fdt_setprop_inplace_u32(void *fdt, int nodeoffset,
const char *name, uint32_t val)
{
val = cpu_to_fdt32(val);
return fdt_setprop_inplace(fdt, nodeoffset, name, &val, sizeof(val));
}
/**
* fdt_setprop_inplace_u64 - change the value of a 64-bit integer property
* @fdt: pointer to the device tree blob
* @nodeoffset: offset of the node whose property to change
* @name: name of the property to change
* @val: 64-bit integer value to replace the property with
*
* fdt_setprop_inplace_u64() replaces the value of a given property
* with the 64-bit integer value in val, converting val to big-endian
* if necessary. This function cannot change the size of a property,
* and so will only work if the property already exists and has length
* 8.
*
* This function will alter only the bytes in the blob which contain
* the given property value, and will not alter or move any other part
* of the tree.
*
* returns:
* 0, on success
* -FDT_ERR_NOSPACE, if the property's length is not equal to 8
* -FDT_ERR_NOTFOUND, node does not have the named property
* -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
* -FDT_ERR_BADMAGIC,
* -FDT_ERR_BADVERSION,
* -FDT_ERR_BADSTATE,
* -FDT_ERR_BADSTRUCTURE,
* -FDT_ERR_TRUNCATED, standard meanings
*/
static inline int fdt_setprop_inplace_u64(void *fdt, int nodeoffset,
const char *name, uint64_t val)
{
val = cpu_to_fdt64(val);
return fdt_setprop_inplace(fdt, nodeoffset, name, &val, sizeof(val));
}
/**
* fdt_setprop_inplace_cell - change the value of a single-cell property
*
* This is an alternative name for fdt_setprop_inplace_u32()
*/
static inline int fdt_setprop_inplace_cell(void *fdt, int nodeoffset,
const char *name, uint32_t val)
{
return fdt_setprop_inplace_u32(fdt, nodeoffset, name, val);
}
/**
* fdt_nop_property - replace a property with nop tags
* @fdt: pointer to the device tree blob
@ -945,11 +991,20 @@ int fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size);
int fdt_finish_reservemap(void *fdt);
int fdt_begin_node(void *fdt, const char *name);
int fdt_property(void *fdt, const char *name, const void *val, int len);
static inline int fdt_property_cell(void *fdt, const char *name, uint32_t val)
static inline int fdt_property_u32(void *fdt, const char *name, uint32_t val)
{
val = cpu_to_fdt32(val);
return fdt_property(fdt, name, &val, sizeof(val));
}
static inline int fdt_property_u64(void *fdt, const char *name, uint64_t val)
{
val = cpu_to_fdt64(val);
return fdt_property(fdt, name, &val, sizeof(val));
}
static inline int fdt_property_cell(void *fdt, const char *name, uint32_t val)
{
return fdt_property_u32(fdt, name, val);
}
#define fdt_property_string(fdt, name, str) \
fdt_property(fdt, name, str, strlen(str)+1)
int fdt_end_node(void *fdt);
@ -1068,14 +1123,14 @@ int fdt_setprop(void *fdt, int nodeoffset, const char *name,
const void *val, int len);
/**
* fdt_setprop_cell - set a property to a single cell value
* fdt_setprop_u32 - set a property to a 32-bit integer
* @fdt: pointer to the device tree blob
* @nodeoffset: offset of the node whose property to change
* @name: name of the property to change
* @val: 32-bit integer value for the property (native endian)
*
* fdt_setprop_cell() sets the value of the named property in the
* given node to the given cell value (converting to big-endian if
* fdt_setprop_u32() sets the value of the named property in the given
* node to the given 32-bit integer value (converting to big-endian if
* necessary), or creates a new property with that value if it does
* not already exist.
*
@ -1095,13 +1150,59 @@ int fdt_setprop(void *fdt, int nodeoffset, const char *name,
* -FDT_ERR_BADLAYOUT,
* -FDT_ERR_TRUNCATED, standard meanings
*/
static inline int fdt_setprop_cell(void *fdt, int nodeoffset, const char *name,
static inline int fdt_setprop_u32(void *fdt, int nodeoffset, const char *name,
uint32_t val)
{
val = cpu_to_fdt32(val);
return fdt_setprop(fdt, nodeoffset, name, &val, sizeof(val));
}
/**
* fdt_setprop_u64 - set a property to a 64-bit integer
* @fdt: pointer to the device tree blob
* @nodeoffset: offset of the node whose property to change
* @name: name of the property to change
* @val: 64-bit integer value for the property (native endian)
*
* fdt_setprop_u64() sets the value of the named property in the given
* node to the given 64-bit integer value (converting to big-endian if
* necessary), or creates a new property with that value if it does
* not already exist.
*
* This function may insert or delete data from the blob, and will
* therefore change the offsets of some existing nodes.
*
* returns:
* 0, on success
* -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
* contain the new property value
* -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
* -FDT_ERR_BADLAYOUT,
* -FDT_ERR_BADMAGIC,
* -FDT_ERR_BADVERSION,
* -FDT_ERR_BADSTATE,
* -FDT_ERR_BADSTRUCTURE,
* -FDT_ERR_BADLAYOUT,
* -FDT_ERR_TRUNCATED, standard meanings
*/
static inline int fdt_setprop_u64(void *fdt, int nodeoffset, const char *name,
uint64_t val)
{
val = cpu_to_fdt64(val);
return fdt_setprop(fdt, nodeoffset, name, &val, sizeof(val));
}
/**
* fdt_setprop_cell - set a property to a single cell value
*
* This is an alternative name for fdt_setprop_u32()
*/
static inline int fdt_setprop_cell(void *fdt, int nodeoffset, const char *name,
uint32_t val)
{
return fdt_setprop_u32(fdt, nodeoffset, name, val);
}
/**
* fdt_setprop_string - set a property to a string value
* @fdt: pointer to the device tree blob
@ -1164,16 +1265,16 @@ int fdt_appendprop(void *fdt, int nodeoffset, const char *name,
const void *val, int len);
/**
* fdt_appendprop_cell - append a single cell value to a property
* fdt_appendprop_u32 - append a 32-bit integer value to a property
* @fdt: pointer to the device tree blob
* @nodeoffset: offset of the node whose property to change
* @name: name of the property to change
* @val: 32-bit integer value to append to the property (native endian)
*
* fdt_appendprop_cell() appends the given cell value (converting to
* big-endian if necessary) to the value of the named property in the
* given node, or creates a new property with that value if it does
* not already exist.
* fdt_appendprop_u32() appends the given 32-bit integer value
* (converting to big-endian if necessary) to the value of the named
* property in the given node, or creates a new property with that
* value if it does not already exist.
*
* This function may insert data into the blob, and will therefore
* change the offsets of some existing nodes.
@ -1191,13 +1292,59 @@ int fdt_appendprop(void *fdt, int nodeoffset, const char *name,
* -FDT_ERR_BADLAYOUT,
* -FDT_ERR_TRUNCATED, standard meanings
*/
static inline int fdt_appendprop_cell(void *fdt, int nodeoffset,
static inline int fdt_appendprop_u32(void *fdt, int nodeoffset,
const char *name, uint32_t val)
{
val = cpu_to_fdt32(val);
return fdt_appendprop(fdt, nodeoffset, name, &val, sizeof(val));
}
/**
* fdt_appendprop_u64 - append a 64-bit integer value to a property
* @fdt: pointer to the device tree blob
* @nodeoffset: offset of the node whose property to change
* @name: name of the property to change
* @val: 64-bit integer value to append to the property (native endian)
*
* fdt_appendprop_u64() appends the given 64-bit integer value
* (converting to big-endian if necessary) to the value of the named
* property in the given node, or creates a new property with that
* value if it does not already exist.
*
* This function may insert data into the blob, and will therefore
* change the offsets of some existing nodes.
*
* returns:
* 0, on success
* -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
* contain the new property value
* -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
* -FDT_ERR_BADLAYOUT,
* -FDT_ERR_BADMAGIC,
* -FDT_ERR_BADVERSION,
* -FDT_ERR_BADSTATE,
* -FDT_ERR_BADSTRUCTURE,
* -FDT_ERR_BADLAYOUT,
* -FDT_ERR_TRUNCATED, standard meanings
*/
static inline int fdt_appendprop_u64(void *fdt, int nodeoffset,
const char *name, uint64_t val)
{
val = cpu_to_fdt64(val);
return fdt_appendprop(fdt, nodeoffset, name, &val, sizeof(val));
}
/**
* fdt_appendprop_cell - append a single cell value to a property
*
* This is an alternative name for fdt_appendprop_u32()
*/
static inline int fdt_appendprop_cell(void *fdt, int nodeoffset,
const char *name, uint32_t val)
{
return fdt_appendprop_u32(fdt, nodeoffset, name, val);
}
/**
* fdt_appendprop_string - append a string to a property
* @fdt: pointer to the device tree blob