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Subject[PATCH 1/2] regmap: Add support for device with 24 data bits.
Date
Add support for devices with 24 data bits.

Signed-off-by: Marc Reilly <marc@cpdesign.com.au>
---
drivers/base/regmap/regmap.c | 23 +++++++++++++++++++++++
1 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 253882d..9cfe203 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -126,6 +126,15 @@ static void regmap_format_16(void *buf, unsigned int val)
b[0] = cpu_to_be16(val);
}

+static void regmap_format_24(void *buf, unsigned int val)
+{
+ u8 *b = buf;
+
+ b[0] = val >> 16;
+ b[1] = val >> 8;
+ b[2] = val;
+}
+
static void regmap_format_32(void *buf, unsigned int val)
{
__be32 *b = buf;
@@ -149,6 +158,16 @@ static unsigned int regmap_parse_16(void *buf)
return b[0];
}

+static unsigned int regmap_parse_24(void *buf)
+{
+ u8 *b = buf;
+ unsigned int ret = b[2];
+ ret |= ((unsigned int)b[1]) << 8;
+ ret |= ((unsigned int)b[0]) << 16;
+
+ return ret;
+}
+
static unsigned int regmap_parse_32(void *buf)
{
__be32 *b = buf;
@@ -273,6 +292,10 @@ struct regmap *regmap_init(struct device *dev,
map->format.format_val = regmap_format_16;
map->format.parse_val = regmap_parse_16;
break;
+ case 24:
+ map->format.format_val = regmap_format_24;
+ map->format.parse_val = regmap_parse_24;
+ break;
case 32:
map->format.format_val = regmap_format_32;
map->format.parse_val = regmap_parse_32;
--
1.7.3.4


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