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dm: core: support reading a single indexed u64 value

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Add helper function to allow reading a single indexed u64 value from a
device-tree property containing multiple u64 values, that is an array of
u64's.

Co-developed-by: Ashok Reddy Soma <ashok.reddy.soma@amd.com>
Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@amd.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/08043c8d204d0068f04c27de86afe78c75c50b69.1692956263.git.michal.simek@amd.com
This commit is contained in:
Michal Simek
2023-08-25 11:37:46 +02:00
parent 91ed45a24f
commit fa12dfa08a
6 changed files with 82 additions and 4 deletions
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19
include/dm/of_access.h
View File

@@ -333,6 +333,25 @@ int of_read_u32(const struct device_node *np, const char *propname, u32 *outp);
int of_read_u32_index(const struct device_node *np, const char *propname,
int index, u32 *outp);
/**
* of_read_u64_index() - Find and read a 64-bit value from a multi-value
* property
*
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @index: index of the u32 in the list of values
* @outp: pointer to return value, modified only if return value is 0.
*
* Search for a property in a device node and read a 64-bit value from
* it.
*
* Return:
* 0 on success, -EINVAL if the property does not exist, or -EOVERFLOW if the
* property data isn't large enough.
*/
int of_read_u64_index(const struct device_node *np, const char *propname,
int index, u64 *outp);
/**
* of_read_u64() - Find and read a 64-bit integer from a property
*

12
include/dm/ofnode.h
View File

@@ -434,6 +434,18 @@ int ofnode_read_u32(ofnode node, const char *propname, u32 *outp);
int ofnode_read_u32_index(ofnode node, const char *propname, int index,
u32 *outp);
/**
* ofnode_read_u64_index() - Read a 64-bit integer from a multi-value property
*
* @node: valid node reference to read property from
* @propname: name of the property to read from
* @index: index of the integer to return
* @outp: place to put value (if found)
* Return: 0 if OK, -ve on error
*/
int ofnode_read_u64_index(ofnode node, const char *propname, int index,
u64 *outp);
/**
* ofnode_read_s32() - Read a 32-bit integer from a property
*