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[Qemu-devel] [PULL 04/55] device_tree: Add qemu_fdt_node_unit_path
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PULL 04/55] device_tree: Add qemu_fdt_node_unit_path |
Date: |
Fri, 29 Jun 2018 15:52:56 +0100 |
From: Eric Auger <address@hidden>
This helper allows to retrieve the paths of nodes whose name
match node-name or address@hidden patterns.
Signed-off-by: Eric Auger <address@hidden>
Message-id: address@hidden
Reviewed-by: Peter Maydell <address@hidden>
Signed-off-by: Peter Maydell <address@hidden>
---
include/sysemu/device_tree.h | 16 +++++++++++
device_tree.c | 55 ++++++++++++++++++++++++++++++++++++
2 files changed, 71 insertions(+)
diff --git a/include/sysemu/device_tree.h b/include/sysemu/device_tree.h
index e22e5bec9c3..c16fd69bc0b 100644
--- a/include/sysemu/device_tree.h
+++ b/include/sysemu/device_tree.h
@@ -43,6 +43,22 @@ void *load_device_tree_from_sysfs(void);
char **qemu_fdt_node_path(void *fdt, const char *name, char *compat,
Error **errp);
+/**
+ * qemu_fdt_node_unit_path: return the paths of nodes matching a given
+ * node-name, ie. node-name and address@hidden
+ * @fdt: pointer to the dt blob
+ * @name: node name
+ * @errp: handle to an error object
+ *
+ * returns a newly allocated NULL-terminated array of node paths.
+ * Use g_strfreev() to free it. If one or more nodes were found, the
+ * array contains the path of each node and the last element equals to
+ * NULL. If there is no error but no matching node was found, the
+ * returned array contains a single element equal to NULL. If an error
+ * was encountered when parsing the blob, the function returns NULL
+ */
+char **qemu_fdt_node_unit_path(void *fdt, const char *name, Error **errp);
+
int qemu_fdt_setprop(void *fdt, const char *node_path,
const char *property, const void *val, int size);
int qemu_fdt_setprop_cell(void *fdt, const char *node_path,
diff --git a/device_tree.c b/device_tree.c
index 3553819257b..6d9c9726f66 100644
--- a/device_tree.c
+++ b/device_tree.c
@@ -232,6 +232,61 @@ static int findnode_nofail(void *fdt, const char
*node_path)
return offset;
}
+char **qemu_fdt_node_unit_path(void *fdt, const char *name, Error **errp)
+{
+ char *prefix = g_strdup_printf("%s@", name);
+ unsigned int path_len = 16, n = 0;
+ GSList *path_list = NULL, *iter;
+ const char *iter_name;
+ int offset, len, ret;
+ char **path_array;
+
+ offset = fdt_next_node(fdt, -1, NULL);
+
+ while (offset >= 0) {
+ iter_name = fdt_get_name(fdt, offset, &len);
+ if (!iter_name) {
+ offset = len;
+ break;
+ }
+ if (!strcmp(iter_name, name) || g_str_has_prefix(iter_name, prefix)) {
+ char *path;
+
+ path = g_malloc(path_len);
+ while ((ret = fdt_get_path(fdt, offset, path, path_len))
+ == -FDT_ERR_NOSPACE) {
+ path_len += 16;
+ path = g_realloc(path, path_len);
+ }
+ path_list = g_slist_prepend(path_list, path);
+ n++;
+ }
+ offset = fdt_next_node(fdt, offset, NULL);
+ }
+ g_free(prefix);
+
+ if (offset < 0 && offset != -FDT_ERR_NOTFOUND) {
+ error_setg(errp, "%s: abort parsing dt for %s node units: %s",
+ __func__, name, fdt_strerror(offset));
+ for (iter = path_list; iter; iter = iter->next) {
+ g_free(iter->data);
+ }
+ g_slist_free(path_list);
+ return NULL;
+ }
+
+ path_array = g_new(char *, n + 1);
+ path_array[n--] = NULL;
+
+ for (iter = path_list; iter; iter = iter->next) {
+ path_array[n--] = iter->data;
+ }
+
+ g_slist_free(path_list);
+
+ return path_array;
+}
+
char **qemu_fdt_node_path(void *fdt, const char *name, char *compat,
Error **errp)
{
--
2.17.1
- [Qemu-devel] [PULL 00/55] target-arm queue, Peter Maydell, 2018/06/29
- [Qemu-devel] [PULL 10/55] target/arm: Implement SVE load and broadcast quadword, Peter Maydell, 2018/06/29
- [Qemu-devel] [PULL 09/55] target/arm: Implement SVE Memory Contiguous Store Group, Peter Maydell, 2018/06/29
- [Qemu-devel] [PULL 01/55] hw/block/fdc: Replace error_setg(&error_abort) by assert(), Peter Maydell, 2018/06/29
- [Qemu-devel] [PULL 05/55] hw/arm/virt: Silence dtc /intc warnings, Peter Maydell, 2018/06/29
- [Qemu-devel] [PULL 04/55] device_tree: Add qemu_fdt_node_unit_path,
Peter Maydell <=
- [Qemu-devel] [PULL 08/55] target/arm: Implement SVE Contiguous Load, first-fault and no-fault, Peter Maydell, 2018/06/29
- [Qemu-devel] [PULL 11/55] target/arm: Implement SVE integer convert to floating-point, Peter Maydell, 2018/06/29
- [Qemu-devel] [PULL 06/55] hw/arm/virt: Silence dtc /memory warning, Peter Maydell, 2018/06/29
- [Qemu-devel] [PULL 03/55] device_tree: Replace error_setg(&error_fatal) by error_report() + exit(), Peter Maydell, 2018/06/29
- [Qemu-devel] [PULL 02/55] hw/arm/sysbus-fdt: Replace error_setg(&error_fatal) by error_report() + exit(), Peter Maydell, 2018/06/29
- [Qemu-devel] [PULL 14/55] target/arm: Implement SVE Floating Point Accumulating Reduction Group, Peter Maydell, 2018/06/29
- [Qemu-devel] [PULL 16/55] target/arm: Implement SVE store vector/predicate register, Peter Maydell, 2018/06/29
- [Qemu-devel] [PULL 07/55] target/arm: Implement SVE Memory Contiguous Load Group, Peter Maydell, 2018/06/29
- [Qemu-devel] [PULL 21/55] target/arm: Implement SVE scatter store vector immediate, Peter Maydell, 2018/06/29
- [Qemu-devel] [PULL 26/55] target/arm: Implement SVE Floating Point Unary Operations - Unpredicated Group, Peter Maydell, 2018/06/29