This will allow devices that require 32 bits register accesses to write
data in chunks of 8 or 16 bits.
One SoC that requires 32 bit register accesses is the google gs101. A
typical use case is SPI, where the clients can request transfers in words
of 8 bits.
Signed-off-by: Tudor Ambarus <tudor.ambarus@xxxxxxxxxx>
---
include/asm-generic/io.h | 50 +++++++++++++++++++++++++++++++++++++
include/asm-generic/iomap.h | 2 ++
2 files changed, 52 insertions(+)
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index bac63e874c7b..1e224d1ccc98 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -476,6 +476,21 @@ static inline void writesb(volatile void __iomem *addr, const void *buffer,
}
#endif
+#ifndef writesb_l
+#define writesb_l writesb_l
+static inline void writesb_l(volatile void __iomem *addr, const void *buffer,
+ unsigned int count)
+{
+ if (count) {
+ const u8 *buf = buffer;
+
+ do {
+ __raw_writel(*buf++, addr);
+ } while (--count);
+ }
+}
+#endif
+
#ifndef writesw
#define writesw writesw
static inline void writesw(volatile void __iomem *addr, const void *buffer,
@@ -491,6 +506,21 @@ static inline void writesw(volatile void __iomem *addr, const void *buffer,
}
#endif
+#ifndef writesw_l
+#define writesw_l writesw_l
+static inline void writesw_l(volatile void __iomem *addr, const void *buffer,
+ unsigned int count)
+{
+ if (count) {
+ const u16 *buf = buffer;
+
+ do {
+ __raw_writel(*buf++, addr);
+ } while (--count);
+ }
+}
+#endif
+
#ifndef writesl
#define writesl writesl
static inline void writesl(volatile void __iomem *addr, const void *buffer,
@@ -956,6 +986,16 @@ static inline void iowrite8_rep(volatile void __iomem *addr,
}
#endif
+#ifndef iowrite8_32_rep
+#define iowrite8_32_rep iowrite8_32_rep
+static inline void iowrite8_32_rep(volatile void __iomem *addr,
+ const void *buffer,
+ unsigned int count)
+{
+ writesb_l(addr, buffer, count);
+}
+#endif
+
#ifndef iowrite16_rep
#define iowrite16_rep iowrite16_rep
static inline void iowrite16_rep(volatile void __iomem *addr,
@@ -966,6 +1006,16 @@ static inline void iowrite16_rep(volatile void __iomem *addr,
}
#endif
+#ifndef iowrite16_32_rep
+#define iowrite16_32_rep iowrite16_32_rep
+static inline void iowrite16_32_rep(volatile void __iomem *addr,
+ const void *buffer,
+ unsigned int count)
+{
+ writesw_l(addr, buffer, count);
+}
+#endif
+
#ifndef iowrite32_rep
#define iowrite32_rep iowrite32_rep
static inline void iowrite32_rep(volatile void __iomem *addr,
diff --git a/include/asm-generic/iomap.h b/include/asm-generic/iomap.h
index 196087a8126e..9d63f9adf2db 100644
--- a/include/asm-generic/iomap.h
+++ b/include/asm-generic/iomap.h
@@ -84,7 +84,9 @@ extern void ioread16_rep(const void __iomem *port, void *buf, unsigned long coun
extern void ioread32_rep(const void __iomem *port, void *buf, unsigned long count);
extern void iowrite8_rep(void __iomem *port, const void *buf, unsigned long count);
+extern void iowrite8_32_rep(void __iomem *port, const void *buf, unsigned long count);
extern void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count);
+extern void iowrite16_32_rep(void __iomem *port, const void *buf, unsigned long count);
extern void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count);
#ifdef CONFIG_HAS_IOPORT_MAP
--
2.43.0.429.g432eaa2c6b-goog
