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lib: utils/fdt: introduce fdt_node_is_enabled() 

If an FDT node contains a "status" property and this property is not
"ok" or "okay", this node should be ignored. Introduce a function that
checks this.

Signed-off-by: Jan Remes <jan.remes@codasip.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Jan Remes 2022-05-13 12:58:40 +02:00 committed by Anup Patel
parent 851c14d455
commit 90a9dd2b22
2 changed files with 20 additions and 0 deletions
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2
include/sbi_utils/fdt/fdt_helper.h
View File

@ -48,6 +48,8 @@ int fdt_parse_phandle_with_args(void *fdt, int nodeoff,
int fdt_get_node_addr_size(void *fdt, int node, int index, int fdt_get_node_addr_size(void *fdt, int node, int index,
uint64_t *addr, uint64_t *size); uint64_t *addr, uint64_t *size);
bool fdt_node_is_enabled(void *fdt, int nodeoff);
int fdt_parse_hart_id(void *fdt, int cpu_offset, u32 *hartid); int fdt_parse_hart_id(void *fdt, int cpu_offset, u32 *hartid);
int fdt_parse_max_hart_id(void *fdt, u32 *max_hartid); int fdt_parse_max_hart_id(void *fdt, u32 *max_hartid);

18
lib/utils/fdt/fdt_helper.c
View File

@ -216,6 +216,24 @@ int fdt_get_node_addr_size(void *fdt, int node, int index,
return 0; return 0;
} }
bool fdt_node_is_enabled(void *fdt, int nodeoff)
{
int len;
const void *prop;
prop = fdt_getprop(fdt, nodeoff, "status", &len);
if (!prop)
return true;
if (!strncmp(prop, "okay", strlen("okay")))
return true;
if (!strncmp(prop, "ok", strlen("ok")))
return true;
return false;
}
int fdt_parse_hart_id(void *fdt, int cpu_offset, u32 *hartid) int fdt_parse_hart_id(void *fdt, int cpu_offset, u32 *hartid)
{ {
int len; int len;