[PATCH v3 3/6] media: v4l: cci: Add macros to obtain register width and address

[Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>]

Add CCI_REG_WIDTH() macro to obtain register width in bits and similarly,
CCI_REG_WIDTH_BYTES() to obtain it in bytes.

Also add CCI_REG_ADDR() macro to obtain the address of a register.

Use both macros in v4l2-cci.c, too.

Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
 drivers/media/v4l2-core/v4l2-cci.c | 8 ++++----
 include/media/v4l2-cci.h           | 9 +++++++--
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-cci.c b/drivers/media/v4l2-core/v4l2-cci.c
index bc2dbec019b0..3179160abde3 100644
--- a/drivers/media/v4l2-core/v4l2-cci.c
+++ b/drivers/media/v4l2-core/v4l2-cci.c
@@ -25,8 +25,8 @@ int cci_read(struct regmap *map, u32 reg, u64 *val, int *err)
 	if (err && *err)
 		return *err;
 
-	len = FIELD_GET(CCI_REG_WIDTH_MASK, reg);
-	reg = FIELD_GET(CCI_REG_ADDR_MASK, reg);
+	len = CCI_REG_WIDTH_BYTES(reg);
+	reg = CCI_REG_ADDR(reg);
 
 	ret = regmap_bulk_read(map, reg, buf, len);
 	if (ret) {
@@ -75,8 +75,8 @@ int cci_write(struct regmap *map, u32 reg, u64 val, int *err)
 	if (err && *err)
 		return *err;
 
-	len = FIELD_GET(CCI_REG_WIDTH_MASK, reg);
-	reg = FIELD_GET(CCI_REG_ADDR_MASK, reg);
+	len = CCI_REG_WIDTH_BYTES(reg);
+	reg = CCI_REG_ADDR(reg);
 
 	switch (len) {
 	case 1:
diff --git a/include/media/v4l2-cci.h b/include/media/v4l2-cci.h
index ee469f03e440..50df3aa4af1d 100644
--- a/include/media/v4l2-cci.h
+++ b/include/media/v4l2-cci.h
@@ -7,6 +7,7 @@
 #ifndef _V4L2_CCI_H
 #define _V4L2_CCI_H
 
+#include <linux/bitfield.h>
 #include <linux/bits.h>
 #include <linux/types.h>
 
@@ -36,8 +37,12 @@ struct cci_reg_sequence {
 /*
  * Private CCI register flags, for the use of drivers.
  */
-#define CCI_REG_PRIVATE_SHIFT		28U
-#define CCI_REG_PRIVATE_MASK		GENMASK(31U, CCI_REG_PRIVATE_SHIFT)
+#define CCI_REG_PRIVATE_SHIFT		28
+#define CCI_REG_PRIVATE_MASK		GENMASK(31, CCI_REG_PRIVATE_SHIFT)
+
+#define CCI_REG_WIDTH_BYTES(x)		FIELD_GET(CCI_REG_WIDTH_MASK, x)
+#define CCI_REG_WIDTH(x)		(CCI_REG_WIDTH_BYTES(x) << 3)
+#define CCI_REG_ADDR(x)			FIELD_GET(CCI_REG_ADDR_MASK, x)
 
 #define CCI_REG8(x)			((1 << CCI_REG_WIDTH_SHIFT) | (x))
 #define CCI_REG16(x)			((2 << CCI_REG_WIDTH_SHIFT) | (x))
-- 
2.39.2