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[RFC PATCH 04/12] device_tree: add qemu_fdt_add_path
From: |
Ying Fang |
Subject: |
[RFC PATCH 04/12] device_tree: add qemu_fdt_add_path |
Date: |
Thu, 17 Sep 2020 11:20:25 +0800 |
From: Andrew Jones <drjones@redhat.com>
qemu_fdt_add_path works like qemu_fdt_add_subnode, except it
also recursively adds any missing parent nodes.
Cc: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Cc: Alexander Graf <agraf@suse.de>
Signed-off-by: Andrew Jones <drjones@redhat.com>
---
device_tree.c | 24 ++++++++++++++++++++++++
include/sysemu/device_tree.h | 1 +
2 files changed, 25 insertions(+)
diff --git a/device_tree.c b/device_tree.c
index b335dae707..1854be3a02 100644
--- a/device_tree.c
+++ b/device_tree.c
@@ -524,6 +524,30 @@ int qemu_fdt_add_subnode(void *fdt, const char *name)
return retval;
}
+int qemu_fdt_add_path(void *fdt, const char *path)
+{
+ char *parent;
+ int offset;
+
+ offset = fdt_path_offset(fdt, path);
+ if (offset < 0 && offset != -FDT_ERR_NOTFOUND) {
+ error_report("%s Couldn't find node %s: %s", __func__, path,
+ fdt_strerror(offset));
+ exit(1);
+ }
+
+ if (offset != -FDT_ERR_NOTFOUND) {
+ return offset;
+ }
+
+ parent = g_strdup(path);
+ strrchr(parent, '/')[0] = '\0';
+ qemu_fdt_add_path(fdt, parent);
+ g_free(parent);
+
+ return qemu_fdt_add_subnode(fdt, path);
+}
+
void qemu_fdt_dumpdtb(void *fdt, int size)
{
const char *dumpdtb = qemu_opt_get(qemu_get_machine_opts(), "dumpdtb");
diff --git a/include/sysemu/device_tree.h b/include/sysemu/device_tree.h
index 982c89345f..15fb98af98 100644
--- a/include/sysemu/device_tree.h
+++ b/include/sysemu/device_tree.h
@@ -104,6 +104,7 @@ uint32_t qemu_fdt_get_phandle(void *fdt, const char *path);
uint32_t qemu_fdt_alloc_phandle(void *fdt);
int qemu_fdt_nop_node(void *fdt, const char *node_path);
int qemu_fdt_add_subnode(void *fdt, const char *name);
+int qemu_fdt_add_path(void *fdt, const char *path);
#define qemu_fdt_setprop_cells(fdt, node_path, property, ...) \
do { \
--
2.23.0
- Re: [RFC PATCH 05/12] hw/arm/virt: DT: add cpu-map, (continued)
[RFC PATCH 09/12] target/arm/cpu: Add CPU cache description for arm, Ying Fang, 2020/09/16
[RFC PATCH 04/12] device_tree: add qemu_fdt_add_path,
Ying Fang <=
[RFC PATCH 01/12] linux headers: Update linux header with KVM_ARM_SET_MP_AFFINITY, Ying Fang, 2020/09/16
[RFC PATCH 03/12] target/arm/kvm32: make MPIDR consistent with CPU Topology, Ying Fang, 2020/09/16
[RFC PATCH 07/12] hw/acpi/aml-build: add processor hierarchy node structure, Ying Fang, 2020/09/16