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author | Anup Patel <anup.patel@wdc.com> | 2020-04-24 16:02:10 +0300 |
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committer | Anup Patel <anup@brainfault.org> | 2020-05-01 07:09:44 +0300 |
commit | a39cd6fe4c263f00228daaefc41c2b03b96f784d (patch) | |
tree | 1edcbfc52d0e842e7c4a7f1cf50fbbaa3618d58c /lib/utils/fdt | |
parent | e3ad7c13a07275df7f3dbee68e3e95d73d7a1e0e (diff) | |
download | opensbi-a39cd6fe4c263f00228daaefc41c2b03b96f784d.tar.xz |
lib: utils: Add FDT match table based node lookup
This patch adds FDT match table based node lookup funcitons.
These functions will be useful in implementing simple FDT
based driver frameworks.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Diffstat (limited to 'lib/utils/fdt')
-rw-r--r-- | lib/utils/fdt/fdt_helper.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/lib/utils/fdt/fdt_helper.c b/lib/utils/fdt/fdt_helper.c index 573cc71..e8c927d 100644 --- a/lib/utils/fdt/fdt_helper.c +++ b/lib/utils/fdt/fdt_helper.c @@ -18,6 +18,47 @@ #define DEFAULT_UART_REG_SHIFT 0 #define DEFAULT_UART_REG_IO_WIDTH 1 +const struct fdt_match *fdt_match_node(void *fdt, int nodeoff, + const struct fdt_match *match_table) +{ + int ret; + + if (!fdt || nodeoff < 0 || !match_table) + return NULL; + + while (match_table->compatible) { + ret = fdt_node_check_compatible(fdt, nodeoff, + match_table->compatible); + if (!ret) + return match_table; + match_table++; + } + + return NULL; +} + +int fdt_find_match(void *fdt, const struct fdt_match *match_table, + const struct fdt_match **out_match) +{ + int nodeoff; + + if (!fdt || !match_table) + return SBI_ENODEV; + + while (match_table->compatible) { + nodeoff = fdt_node_offset_by_compatible(fdt, -1, + match_table->compatible); + if (nodeoff >= 0) { + if (out_match) + *out_match = match_table; + return nodeoff; + } + match_table++; + } + + return SBI_ENODEV; +} + static int fdt_get_node_addr_size(void *fdt, int node, unsigned long *addr, unsigned long *size) { |