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driver/fdt] add parse reg array, get address and size by index.

This commit is contained in:
xieyangrun 2022-11-15 14:30:58 +08:00 committed by guo
parent 0ea687e0cb
commit 29c7278edc
2 changed files with 38 additions and 0 deletions
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1
components/drivers/fdt/inc/dtb_node.h
View File

@ -329,6 +329,7 @@ struct dtb_node *dtb_node_get_parent(const struct dtb_node *node);
const char *dtb_node_get_name(const struct dtb_node *node);
struct dtb_node *dtb_node_get_by_phandle(uint32_t phandle);
int dtb_node_read_size(const struct dtb_node *node, const char *propname);
int dtb_node_get_addr_and_size_by_index(const struct dtb_node *node, int index, size_t *addr, size_t *size);
size_t dtb_node_get_addr_index(const struct dtb_node *node, int index);
size_t dtb_node_get_addr(const struct dtb_node *node);
int dtb_node_stringlist_search(const struct dtb_node *node, const char *property,

37
components/drivers/fdt/src/dtb_base.c
View File

@ -206,6 +206,43 @@ int dtb_node_read_size(const struct dtb_node *node, const char *propname)
return -EINVAL;
}
int dtb_node_get_addr_and_size_by_index(const struct dtb_node *node, int index, size_t *addr, size_t *size)
{
const uint32_t *prop;
int psize;
int onesize, na, ns;
na = dtb_node_n_addr_cells(node);
ns = dtb_node_n_size_cells(node);
prop = dtb_node_get_dtb_node_property_value(node, "reg", &psize);
if (prop == NULL)
{
return -1;
}
psize /= 4;
onesize = na + ns;
if (psize >= (index + 1) * onesize)
{
prop += index * onesize;
if (addr)
{
*addr = dtb_node_read_number(prop, na);
}
if (size)
{
*size = dtb_node_read_number(prop + na, ns);
}
return 0;
}
return -1;
}
size_t dtb_node_get_addr_index(const struct dtb_node *node, int index)
{
int na;