media: atomisp: gc0310: Remove GC0310_TOK_*

Remove the ability to have special tokens in a reg-list,
GC0310_TOK_DELAY is not used and GC0310_TOK_TERM can be replaced
with ARRAY_SIZE, simplifying the code.
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/staging/media/atomisp/i2c/atomisp-gc0310.c

@@ -134,6 +134,7 @@ static int gc0310_write_reg(struct i2c_client *client, u16 data_length,
  * gc0310_write_reg_array - Initializes a list of GC0310 registers
  * @client: i2c driver client structure
  * @reglist: list of registers to be written
+ * @count: number of register, value pairs in the list
  *
  * This function initializes a list of registers. When consecutive addresses
  * are found in a row on the list, this function creates a buffer and sends
@@ -202,39 +203,28 @@ static int __gc0310_write_reg_is_consecutive(struct i2c_client *client,
 }
 
 static int gc0310_write_reg_array(struct i2c_client *client,
-				  const struct gc0310_reg *reglist)
+				  const struct gc0310_reg *reglist, int count)
 {
-	const struct gc0310_reg *next = reglist;
 	struct gc0310_write_ctrl ctrl;
-	int err;
+	int i, err;
 
 	ctrl.index = 0;
-	for (; next->type != GC0310_TOK_TERM; next++) {
-		switch (next->type & GC0310_TOK_MASK) {
-		case GC0310_TOK_DELAY:
+	for (i = 0; i < count; i++) {
+		/*
+		 * If next address is not consecutive, data needs to be
+		 * flushed before proceed.
+		 */
+		if (!__gc0310_write_reg_is_consecutive(client, &ctrl,
+						       &reglist[i])) {
 			err = __gc0310_flush_reg_array(client, &ctrl);
 			if (err)
 				return err;
-			msleep(next->val);
-			break;
-		default:
-			/*
-			 * If next address is not consecutive, data needs to be
-			 * flushed before proceed.
-			 */
-			if (!__gc0310_write_reg_is_consecutive(client, &ctrl,
-							       next)) {
-				err = __gc0310_flush_reg_array(client, &ctrl);
-				if (err)
-					return err;
-			}
-			err = __gc0310_buf_reg_array(client, &ctrl, next);
-			if (err) {
-				dev_err(&client->dev, "%s: write error, aborted\n",
-					__func__);
-				return err;
-			}
-			break;
+		}
+		err = __gc0310_buf_reg_array(client, &ctrl, &reglist[i]);
+		if (err) {
+			dev_err(&client->dev, "%s: write error, aborted\n",
+				__func__);
+			return err;
 		}
 	}
 
@@ -478,7 +468,8 @@ static int gc0310_init(struct v4l2_subdev *sd)
 	mutex_lock(&dev->input_lock);
 
 	/* set initial registers */
-	ret  = gc0310_write_reg_array(client, gc0310_reset_register);
+	ret = gc0310_write_reg_array(client, gc0310_reset_register,
+				     ARRAY_SIZE(gc0310_reset_register));
 
 	/* restore settings */
 	gc0310_res = gc0310_res_preview;
@@ -648,7 +639,7 @@ static int startup(struct v4l2_subdev *sd)
 	struct i2c_client *client = v4l2_get_subdevdata(sd);
 	int ret = 0;
 
-	ret = gc0310_write_reg_array(client, dev->res->regs);
+	ret = gc0310_write_reg_array(client, dev->res->regs, dev->res->reg_count);
 	if (ret) {
 		dev_err(&client->dev, "gc0310 write register err.\n");
 		return ret;

drivers/staging/media/atomisp/i2c/gc0310.h

@@ -110,6 +110,7 @@
 struct gc0310_resolution {
 	u8 *desc;
 	const struct gc0310_reg *regs;
+	int reg_count;
 	int res;
 	int width;
 	int height;
@@ -139,9 +140,6 @@ struct gc0310_device {
 
 enum gc0310_tok_type {
 	GC0310_8BIT  = 0x0001,
-	GC0310_TOK_TERM   = 0xf000,	/* terminating token for reg list */
-	GC0310_TOK_DELAY  = 0xfe00,	/* delay token for reg list */
-	GC0310_TOK_MASK = 0xfff0
 };
 
 /**
@@ -330,8 +328,6 @@ static const struct gc0310_reg gc0310_reset_register[] = {
 	{GC0310_8BIT, 0x48, 0x03}, //sun mode
 	{GC0310_8BIT, 0x4f, 0x60}, //sun_clamp
 	{GC0310_8BIT, 0xfe, 0x00},
-
-	{GC0310_TOK_TERM, 0, 0},
 };
 
 static struct gc0310_reg const gc0310_VGA_30fps[] = {
@@ -356,8 +352,6 @@ static struct gc0310_reg const gc0310_VGA_30fps[] = {
 	{GC0310_8BIT, 0x13, 0x02},//05 //05 //LWC[15:8]
 
 	{GC0310_8BIT, 0xfe, 0x00},
-
-	{GC0310_TOK_TERM, 0, 0},
 };
 
 static struct gc0310_resolution gc0310_res_preview[] = {
@@ -374,6 +368,7 @@ static struct gc0310_resolution gc0310_res_preview[] = {
 #endif
 		.skip_frames = 2,
 		.regs = gc0310_VGA_30fps,
+		.reg_count = ARRAY_SIZE(gc0310_VGA_30fps),
 	},
 };