[media] smiapp: Unify enforced and need-based 8-bit read

Unify enforced 8-bit read access with that based on actual need.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/i2c/smiapp/smiapp-regs.c

@@ -188,7 +188,8 @@ int smiapp_read_no_quirk(struct smiapp_sensor *sensor, u32 reg, u32 *val)
 				   SMIAPP_QUIRK_FLAG_8BIT_READ_ONLY));
 }
 
-int smiapp_read(struct smiapp_sensor *sensor, u32 reg, u32 *val)
+static int smiapp_read_quirk(struct smiapp_sensor *sensor, u32 reg, u32 *val,
+			     bool force8)
 {
 	int rval;
 
@@ -199,21 +200,20 @@ int smiapp_read(struct smiapp_sensor *sensor, u32 reg, u32 *val)
 	if (rval < 0)
 		return rval;
 
+	if (force8)
+		return __smiapp_read(sensor, reg, val, true);
+
 	return smiapp_read_no_quirk(sensor, reg, val);
 }
 
-int smiapp_read_8only(struct smiapp_sensor *sensor, u32 reg, u32 *val)
+int smiapp_read(struct smiapp_sensor *sensor, u32 reg, u32 *val)
 {
-	int rval;
-
-	*val = 0;
-	rval = smiapp_call_quirk(sensor, reg_access, false, &reg, val);
-	if (rval == -ENOIOCTLCMD)
-		return 0;
-	if (rval < 0)
-		return rval;
+	return smiapp_read_quirk(sensor, reg, val, false);
+}
 
-	return __smiapp_read(sensor, reg, val, true);
+int smiapp_read_8only(struct smiapp_sensor *sensor, u32 reg, u32 *val)
+{
+	return smiapp_read_quirk(sensor, reg, val, true);
 }
 
 int smiapp_write_no_quirk(struct smiapp_sensor *sensor, u32 reg, u32 val)