dm: core: Add a place to put extra device-tree reading functions

Some functions deal with structured data rather than simple data types.
It makes sense to have these in their own file. For now this just has a
function to read a flashmap entry. Move the data types also.

Signed-off-by: Simon Glass <sjg@chromium.org>

6 files changed, 87 insertions, 23 deletions

diff --git a/drivers/core/Makefile b/drivers/core/Makefile
index 1c6795a..d74b065 100644
--- a/drivers/core/Makefile
+++ b/drivers/core/Makefile
@@ -12,4 +12,4 @@ obj-$(CONFIG_DM)	+= dump.o
 obj-$(CONFIG_$(SPL_)REGMAP)	+= regmap.o
 obj-$(CONFIG_$(SPL_)SYSCON)	+= syscon-uclass.o
 obj-$(CONFIG_OF_LIVE) += of_access.o of_addr.o
-obj-$(CONFIG_OF_CONTROL) += ofnode.o
+obj-$(CONFIG_OF_CONTROL) += of_extra.o ofnode.o
diff --git a/drivers/core/of_extra.c b/drivers/core/of_extra.c
new file mode 100644
index 0000000..0381909
--- /dev/null
+++ b/drivers/core/of_extra.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2017 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <libfdt.h>
+#include <dm/of_access.h>
+#include <dm/of_extra.h>
+#include <dm/ofnode.h>
+
+int of_read_fmap_entry(ofnode node, const char *name,
+		       struct fmap_entry *entry)
+{
+	const char *prop;
+	u32 reg[2];
+
+	if (ofnode_read_u32_array(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];
+	entry->used = ofnode_read_s32_default(node, "used", entry->length);
+	prop = ofnode_read_string(node, "compress");
+	entry->compress_algo = prop && !strcmp(prop, "lzo") ?
+		FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
+	prop = ofnode_read_string(node, "hash");
+	if (prop)
+		entry->hash_size = strlen(prop);
+	entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
+	entry->hash = (uint8_t *)prop;
+
+	return 0;
+}
diff --git a/include/cros_ec.h b/include/cros_ec.h
index 0271f2b..2bd9f22 100644
--- a/include/cros_ec.h
+++ b/include/cros_ec.h
@@ -14,6 +14,7 @@
 #include <fdtdec.h>
 #include <cros_ec_message.h>
 #include <asm/gpio.h>
+#include <dm/of_extra.h>
 
 /* Our configuration information */
 struct cros_ec_dev {
diff --git a/include/dm/of_extra.h b/include/dm/of_extra.h
new file mode 100644
index 0000000..01b6ebe
--- /dev/null
+++ b/include/dm/of_extra.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2017 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _DM_OF_EXTRA_H
+#define _DM_OF_EXTRA_H
+
+#include <dm/ofnode.h>
+
+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 */
+};
+
+/**
+ * Read a flash entry from the fdt
+ *
+ * @param node	Reference to 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 of_read_fmap_entry(ofnode node, const char *name,
+		       struct fmap_entry *entry);
+
+#endif
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 3000ecb..f27fb36 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -815,28 +815,7 @@ 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 */
-};
-
+struct fmap_entry;
 /**
  * Read a flash entry from the fdt
  *
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index c072e54..7607320 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -12,6 +12,7 @@
 #include <fdt_support.h>
 #include <fdtdec.h>
 #include <asm/sections.h>
+#include <dm/of_extra.h>
 #include <linux/ctype.h>
 
 DECLARE_GLOBAL_DATA_PTR;