reg_mask is basically the same as clearing & setting registers,
but it is more convenient and faster (saves one rw cycle).
Signed-off-by: Philipp Wiesner <p.wiesner@xxxxxxxxx>
Signed-off-by: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>
---
drivers/media/video/mt9m111.c | 11 +++++++++++
1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/drivers/media/video/mt9m111.c b/drivers/media/video/mt9m111.c
index 4dbaf31..161c751 100644
--- a/drivers/media/video/mt9m111.c
+++ b/drivers/media/video/mt9m111.c
@@ -128,6 +128,8 @@
#define reg_write(reg, val) mt9m111_reg_write(client, MT9M111_##reg, (val))
#define reg_set(reg, val) mt9m111_reg_set(client, MT9M111_##reg, (val))
#define reg_clear(reg, val) mt9m111_reg_clear(client, MT9M111_##reg, (val))
+#define reg_mask(reg, val, mask) mt9m111_reg_mask(client, MT9M111_##reg, \
+ (val), (mask))
#define MT9M111_MIN_DARK_ROWS 8
#define MT9M111_MIN_DARK_COLS 26
@@ -265,6 +267,15 @@ static int mt9m111_reg_clear(struct i2c_client *client, const u16 reg,
return mt9m111_reg_write(client, reg, ret & ~data);
}
+static int mt9m111_reg_mask(struct i2c_client *client, const u16 reg,
+ const u16 data, const u16 mask)
+{
+ int ret;
+
+ ret = mt9m111_reg_read(client, reg);
+ return mt9m111_reg_write(client, reg, (ret & ~mask) | data);
+}
+
static int mt9m111_set_context(struct i2c_client *client,
enum mt9m111_context ctxt)
{
--
1.7.1
--
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