From: Thierry Reding <tred...@nvidia.com>
These helpers can be used to unpack variables of type fdt_addr_t and
fdt_size_t into a pair of 32-bit variables. This is useful in cases
where such variables need to be written to properties (such as "reg")
of a device tree node where they need to be split into cells.
Signed-off-by: Thierry Reding <tred...@nvidia.com>
---
Changes in v2:
- new patch
include/fdtdec.h | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/include/fdtdec.h b/include/fdtdec.h
index a965c33157c9..a0ba57c6318b 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -23,6 +23,31 @@
*/
typedef phys_addr_t fdt_addr_t;
typedef phys_size_t fdt_size_t;
+
+static inline fdt32_t fdt_addr_unpack(fdt_addr_t addr, fdt32_t *upper)
+{
+ if (upper)
+#ifdef CONFIG_PHYS_64BIT
+ *upper = addr >> 32;
+#else
+ *upper = 0;
+#endif
+
+ return addr;
+}
+
+static inline fdt32_t fdt_size_unpack(fdt_size_t size, fdt32_t *upper)
+{
+ if (upper)
+#ifdef CONFIG_PHYS_64BIT
+ *upper = size >> 32;
+#else
+ *upper = 0;
+#endif
+
+ return size;
+}
+
#ifdef CONFIG_PHYS_64BIT
#define FDT_ADDR_T_NONE (-1U)
#define fdt_addr_to_cpu(reg) be64_to_cpu(reg)
--
2.20.1
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