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device_tree: add qemu_fdt_setprop_string_array helper

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A string array in device tree is simply a series of \0 terminated
strings next to each other. As libfdt doesn't support that directly
we need to build it ourselves.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20210303173642.3805-4-alex.bennee@linaro.org>
This commit is contained in:
Alex Bennée 2021-03-03 17:36:38 +00:00
parent c65d7080d8
commit 78da6a1bca
2 changed files with 43 additions and 0 deletions
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17
include/sysemu/device_tree.h
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@ -70,6 +70,23 @@ int qemu_fdt_setprop_u64(void *fdt, const char *node_path,
const char *property, uint64_t val);
int qemu_fdt_setprop_string(void *fdt, const char *node_path,
const char *property, const char *string);
/**
* qemu_fdt_setprop_string_array: set a string array property
*
* @fdt: pointer to the dt blob
* @name: node name
* @prop: property array
* @array: pointer to an array of string pointers
* @len: length of array
*
* assigns a string array to a property. This function converts and
* array of strings to a sequential string with \0 separators before
* setting the property.
*/
int qemu_fdt_setprop_string_array(void *fdt, const char *node_path,
const char *prop, char **array, int len);
int qemu_fdt_setprop_phandle(void *fdt, const char *node_path,
const char *property,
const char *target_node_path);