regmap: core: Split out in place value parsing
Currently the value parsing operations both return the parsed value and
modify the passed buffer. This precludes their use in places like the cache
code so split out the in place modification into a new parse_inplace()
operation.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index 582d7fd..2b5851d 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -38,7 +38,8 @@
unsigned int reg, unsigned int val);
void (*format_reg)(void *buf, unsigned int reg, unsigned int shift);
void (*format_val)(void *buf, unsigned int val, unsigned int shift);
- unsigned int (*parse_val)(void *buf);
+ unsigned int (*parse_val)(const void *buf);
+ void (*parse_inplace)(void *buf);
};
struct regmap_async {
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 3d23675..aff5a8b 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -228,30 +228,39 @@
*(u32 *)buf = val << shift;
}
-static unsigned int regmap_parse_8(void *buf)
+static void regmap_parse_inplace_noop(void *buf)
{
- u8 *b = buf;
+}
+
+static unsigned int regmap_parse_8(const void *buf)
+{
+ const u8 *b = buf;
return b[0];
}
-static unsigned int regmap_parse_16_be(void *buf)
+static unsigned int regmap_parse_16_be(const void *buf)
+{
+ const __be16 *b = buf;
+
+ return be16_to_cpu(b[0]);
+}
+
+static void regmap_parse_16_be_inplace(void *buf)
{
__be16 *b = buf;
b[0] = be16_to_cpu(b[0]);
-
- return b[0];
}
-static unsigned int regmap_parse_16_native(void *buf)
+static unsigned int regmap_parse_16_native(const void *buf)
{
return *(u16 *)buf;
}
-static unsigned int regmap_parse_24(void *buf)
+static unsigned int regmap_parse_24(const void *buf)
{
- u8 *b = buf;
+ const u8 *b = buf;
unsigned int ret = b[2];
ret |= ((unsigned int)b[1]) << 8;
ret |= ((unsigned int)b[0]) << 16;
@@ -259,16 +268,21 @@
return ret;
}
-static unsigned int regmap_parse_32_be(void *buf)
+static unsigned int regmap_parse_32_be(const void *buf)
+{
+ const __be32 *b = buf;
+
+ return be32_to_cpu(b[0]);
+}
+
+static void regmap_parse_32_be_inplace(void *buf)
{
__be32 *b = buf;
b[0] = be32_to_cpu(b[0]);
-
- return b[0];
}
-static unsigned int regmap_parse_32_native(void *buf)
+static unsigned int regmap_parse_32_native(const void *buf)
{
return *(u32 *)buf;
}
@@ -555,16 +569,21 @@
goto err_map;
}
+ if (val_endian == REGMAP_ENDIAN_NATIVE)
+ map->format.parse_inplace = regmap_parse_inplace_noop;
+
switch (config->val_bits) {
case 8:
map->format.format_val = regmap_format_8;
map->format.parse_val = regmap_parse_8;
+ map->format.parse_inplace = regmap_parse_inplace_noop;
break;
case 16:
switch (val_endian) {
case REGMAP_ENDIAN_BIG:
map->format.format_val = regmap_format_16_be;
map->format.parse_val = regmap_parse_16_be;
+ map->format.parse_inplace = regmap_parse_16_be_inplace;
break;
case REGMAP_ENDIAN_NATIVE:
map->format.format_val = regmap_format_16_native;
@@ -585,6 +604,7 @@
case REGMAP_ENDIAN_BIG:
map->format.format_val = regmap_format_32_be;
map->format.parse_val = regmap_parse_32_be;
+ map->format.parse_inplace = regmap_parse_32_be_inplace;
break;
case REGMAP_ENDIAN_NATIVE:
map->format.format_val = regmap_format_32_native;
@@ -1240,7 +1260,7 @@
if (!map->bus)
return -EINVAL;
- if (!map->format.parse_val)
+ if (!map->format.parse_inplace)
return -EINVAL;
if (reg % map->reg_stride)
return -EINVAL;
@@ -1258,7 +1278,7 @@
goto out;
}
for (i = 0; i < val_count * val_bytes; i += val_bytes)
- map->format.parse_val(wval + i);
+ map->format.parse_inplace(wval + i);
}
/*
* Some devices does not support bulk write, for
@@ -1519,7 +1539,7 @@
if (!map->bus)
return -EINVAL;
- if (!map->format.parse_val)
+ if (!map->format.parse_inplace)
return -EINVAL;
if (reg % map->reg_stride)
return -EINVAL;
@@ -1546,7 +1566,7 @@
}
for (i = 0; i < val_count * val_bytes; i += val_bytes)
- map->format.parse_val(val + i);
+ map->format.parse_inplace(val + i);
} else {
for (i = 0; i < val_count; i++) {
unsigned int ival;