From: Dinesh Maniyam <dinesh.mani...@intel.com>
Extend support read and write 64-bits of buffer.
This is required for Cadence NAND Driver to
read/write ONFI parameter page. The parameter page is mapped to 64-bit.
With only read/write 32 bits of buffer,there is an issue of overwriting
last 4 bits of buffer which failed the NAND identification.
Signed-off-by: Dinesh Maniyam <dinesh.mani...@intel.com>
---
v2:
- remove the "this patch is to" commit phrases
---
---
arch/arm/include/asm/io.h | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
index 89b1015bc4..e3ea5f0eb2 100644
--- a/arch/arm/include/asm/io.h
+++ b/arch/arm/include/asm/io.h
@@ -391,6 +391,31 @@ void __memset_io(volatile void __iomem *dst, int c, size_t
count)
count--;
}
}
+
+static inline void readsq(const void __iomem *addr, void *buffer,
+ unsigned int count)
+{
+ if (count) {
+ u64 *buf = buffer;
+
+ do {
+ u64 x = __raw_readq(addr);
+ *buf++ = x;
+ } while (--count);
+ }
+}
+
+static inline void writesq(void __iomem *addr, const void *buffer,
+ unsigned int count)
+{
+ if (count) {
+ const u64 *buf = buffer;
+
+ do {
+ __raw_writeq(*buf++, addr);
+ } while (--count);
+ }
+}
#endif /* CONFIG_ARM64 */
#ifdef CONFIG_ARM64
--
2.19.0
