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authorSimon Glass <sjg@chromium.org>2014-02-27 13:26:01 -0700
committerSimon Glass <sjg@chromium.org>2014-03-17 20:05:46 -0600
commit006e73b9cafde9287912c4699091f3b1f07d3f97 (patch)
tree02b5a8fbde25e8ae45112b7a82f7eb005c530232 /lib
parentcecb19c03f5a7abed2e8ff691bc849bdc3c4ed2c (diff)
cros_ec: Add a function for reading a flash map entry
A flash map describes the layout of flash memory in terms of offsets and sizes for each region. Add a function to read a flash map entry from the device tree. Reviewed-by: Che-Liang Chiou <clchiou@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/fdtdec.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 1fecab3fbc3..c54d97b8939 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -617,3 +617,27 @@ int fdtdec_decode_region(const void *blob, int node,
debug("%s: size=%zx\n", __func__, *size);
return 0;
}
+
+/**
+ * Read a flash entry from the fdt
+ *
+ * @param blob FDT blob
+ * @param node Offset of node to read
+ * @param name Name of node being read
+ * @param entry Place to put offset and size of this node
+ * @return 0 if ok, -ve on error
+ */
+int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
+ struct fmap_entry *entry)
+{
+ u32 reg[2];
+
+ if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
+ debug("Node '%s' has bad/missing 'reg' property\n", name);
+ return -FDT_ERR_NOTFOUND;
+ }
+ entry->offset = reg[0];
+ entry->length = reg[1];
+
+ return 0;
+}