fdt: Add fdtdec_get_addr_size() to read reg properties
It is common to have a "reg = <address size>" property in the FDT.
Add a function to handle this, similar to the existing
fdtdec_get_addr();
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 2189483..5ca84a0 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -38,11 +38,13 @@
*/
#ifdef CONFIG_PHYS_64BIT
typedef u64 fdt_addr_t;
+typedef u64 fdt_size_t;
#define FDT_ADDR_T_NONE (-1ULL)
#define fdt_addr_to_cpu(reg) be64_to_cpu(reg)
#define fdt_size_to_cpu(reg) be64_to_cpu(reg)
#else
typedef u32 fdt_addr_t;
+typedef u32 fdt_size_t;
#define FDT_ADDR_T_NONE (-1U)
#define fdt_addr_to_cpu(reg) be32_to_cpu(reg)
#define fdt_size_to_cpu(reg) be32_to_cpu(reg)
@@ -200,6 +202,19 @@
const char *prop_name);
/**
+ * Look up an address property in a node and return it as an address.
+ * The property must hold one address with a length. This is only tested
+ * on 32-bit machines.
+ *
+ * @param blob FDT blob
+ * @param node node to examine
+ * @param prop_name name of property to find
+ * @return address, if found, or FDT_ADDR_T_NONE if not
+ */
+fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
+ const char *prop_name, fdt_size_t *sizep);
+
+/**
* Look up a 32-bit integer property in a node and return it. The property
* must have at least 4 bytes of data. The value of the first cell is
* returned.