fdt: Enhance flashmap function to deal with region properties

Flash regions can optionally be compressed or hashed. Add the ability to
read this information from the flashmap.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Tom Rini <trini@ti.com>

include/fdtdec.h

@@ -602,10 +602,26 @@ const u8 *fdtdec_locate_byte_array(const void *blob, int node,
 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
 			 fdt_addr_t *basep, fdt_size_t *sizep);
 
+enum fmap_compress_t {
+	FMAP_COMPRESS_NONE,
+	FMAP_COMPRESS_LZO,
+};
+
+enum fmap_hash_t {
+	FMAP_HASH_NONE,
+	FMAP_HASH_SHA1,
+	FMAP_HASH_SHA256,
+};
+
 /* A flash map entry, containing an offset and length */
 struct fmap_entry {
 	uint32_t offset;
 	uint32_t length;
+	uint32_t used;			/* Number of bytes used in region */
+	enum fmap_compress_t compress_algo;	/* Compression type */
+	enum fmap_hash_t hash_algo;		/* Hash algorithm */
+	const uint8_t *hash;			/* Hash value */
+	int hash_size;				/* Hash size */
 };
 
 /**

lib/fdtdec.c

@@ -703,6 +703,7 @@ int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
 			   struct fmap_entry *entry)
 {
+	const char *prop;
 	u32 reg[2];
 
 	if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
@@ -711,6 +712,13 @@ int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
 	}
 	entry->offset = reg[0];
 	entry->length = reg[1];
+	entry->used = fdtdec_get_int(blob, node, "used", entry->length);
+	prop = fdt_getprop(blob, node, "compress", NULL);
+	entry->compress_algo = prop && !strcmp(prop, "lzo") ?
+		FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
+	prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
+	entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
+	entry->hash = (uint8_t *)prop;
 
 	return 0;
 }