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device_tree: Add qemu_fdt_node_unit_path

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This helper allows to retrieve the paths of nodes whose name
match node-name or node-name@unit-address patterns.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Message-id: 1530044492-24921-2-git-send-email-eric.auger@redhat.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Eric Auger 2018-06-29 15:11:01 +01:00 • committed by Peter Maydell
parent 38754e43f6
commit f963cc26df
2 changed files with 71 additions and 0 deletions
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16
include/sysemu/device_tree.h
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@ -43,6 +43,22 @@ void *load_device_tree_from_sysfs(void);
char **qemu_fdt_node_path(void *fdt, const char *name, char *compat,
Error **errp);
/**
* qemu_fdt_node_unit_path: return the paths of nodes matching a given
* node-name, ie. node-name and node-name@unit-address
* @fdt: pointer to the dt blob
* @name: node name
* @errp: handle to an error object
*
* returns a newly allocated NULL-terminated array of node paths.
* Use g_strfreev() to free it. If one or more nodes were found, the
* array contains the path of each node and the last element equals to
* NULL. If there is no error but no matching node was found, the
* returned array contains a single element equal to NULL. If an error
* was encountered when parsing the blob, the function returns NULL
*/
char **qemu_fdt_node_unit_path(void *fdt, const char *name, Error **errp);
int qemu_fdt_setprop(void *fdt, const char *node_path,
const char *property, const void *val, int size);
int qemu_fdt_setprop_cell(void *fdt, const char *node_path,