From e931f387b27a2f575f5b713391e241d8963b48c5 Mon Sep 17 00:00:00 2001
From: Anup Patel <anup.patel@wdc.com>
Date: Tue, 13 Jul 2021 11:23:41 +0800
Subject: lib: utils/fdt: Add fdt_parse_phandle_with_args() API
The libfdt project does not have a generic API to parse phandle
with args from a DT node so we add fdt_parse_phandle_with_args()
for this purpose. This new API will be useful to FDT based drivers.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
---
include/sbi_utils/fdt/fdt_helper.h | 11 +++++++++++
1 file changed, 11 insertions(+)
(limited to 'include')
diff --git a/include/sbi_utils/fdt/fdt_helper.h b/include/sbi_utils/fdt/fdt_helper.h
index 871f9b9..55b9382 100644
--- a/include/sbi_utils/fdt/fdt_helper.h
+++ b/include/sbi_utils/fdt/fdt_helper.h
@@ -17,6 +17,13 @@ struct fdt_match {
void *data;
};
+#define FDT_MAX_PHANDLE_ARGS 16
+struct fdt_phandle_args {
+ int node_offset;
+ int args_count;
+ u32 args[FDT_MAX_PHANDLE_ARGS];
+};
+
struct platform_uart_data {
unsigned long addr;
unsigned long freq;
@@ -32,6 +39,10 @@ int fdt_find_match(void *fdt, int startoff,
const struct fdt_match *match_table,
const struct fdt_match **out_match);
+int fdt_parse_phandle_with_args(void *fdt, int nodeoff,
+ const char *prop, const char *cells_prop,
+ int index, struct fdt_phandle_args *out_args);
+
int fdt_get_node_addr_size(void *fdt, int node, unsigned long *addr,
unsigned long *size);
--
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