[PATCH v2 01/10] include: fdtdec: decouple fdt_addr_t and phys_addr_t size

[Johan Jonker <jbx6244@gmail.com>]

The DT specification supports CPUs with both 32-bit and 64-bit addressing
capabilities. In U-boot the fdt_addr_t and phys_addr_t size are coupled
by a typedef. The MTD NAND drivers for 32-bit CPU's can describe partitions
with a 64-bit reg property. These partitions synced from Linux end up with
the wrong offset and sizes when only the lower 32-bit is passed.
Decouple the fdt_addr_t and phys_addr_t size as they don't necessary
match.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---

Changed V2:
  reword

---

Note:
  Most drivers still assume that FDT and CPU capabilities are identical.
  In order to use these variables a cast is needed.
---
 Kconfig          |  8 ++++++++
 include/fdtdec.h | 13 +++++++++----
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/Kconfig b/Kconfig
index a75cce7e..7697dade 100644
--- a/Kconfig
+++ b/Kconfig
@@ -422,11 +422,19 @@ endif # EXPERT

 config PHYS_64BIT
 	bool "64bit physical address support"
+	select FDT_64BIT
 	help
 	  Say Y here to support 64bit physical memory address.
 	  This can be used not only for 64bit SoCs, but also for
 	  large physical address extension on 32bit SoCs.

+config FDT_64BIT
+	bool "64bit fdt address support"
+	help
+	  Say Y here to support 64bit fdt addresses.
+	  This can be used not only for 64bit SoCs, but also
+	  for large address extensions on 32bit SoCs.
+
 config HAS_ROM
 	bool
 	select BINMAN
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 12355afd..af29ac0c 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -18,15 +18,18 @@
 #include <pci.h>

 /*
- * A typedef for a physical address. Note that fdt data is always big
+ * Support for 64bit fdt addresses.
+ * This can be used not only for 64bit SoCs, but also
+ * for large address extensions on 32bit SoCs.
+ * Note that fdt data is always big
  * endian even on a litle endian machine.
  */
-typedef phys_addr_t fdt_addr_t;
-typedef phys_size_t fdt_size_t;

 #define FDT_SIZE_T_NONE (-1U)

-#ifdef CONFIG_PHYS_64BIT
+#ifdef CONFIG_FDT_64BIT
+typedef u64 fdt_addr_t;
+typedef u64 fdt_size_t;
 #define FDT_ADDR_T_NONE ((ulong)(-1))

 #define fdt_addr_to_cpu(reg) be64_to_cpu(reg)
@@ -35,6 +38,8 @@ typedef phys_size_t fdt_size_t;
 #define cpu_to_fdt_size(reg) cpu_to_be64(reg)
 typedef fdt64_t fdt_val_t;
 #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)
--
2.20.1