Input: st1232 - simplify parsing of read buffer

{

	struct st1232_ts_finger *finger = ts->finger;

	struct i2c_client *client = ts->client;

	struct i2c_msg msg[2];

	int error;

	int i, y;

	u8 start_reg = ts->chip_info->start_reg;

	u8 *buf = ts->read_buf;

	/* read touchscreen data */

	msg[0].addr = client->addr;

	msg[0].flags = 0;

	msg[0].len = 1;

	msg[0].buf = &start_reg;

	msg[1].addr = ts->client->addr;

	msg[1].flags = I2C_M_RD;

	msg[1].len = ts->read_buf_len;

	msg[1].buf = buf;

	struct i2c_msg msg[] = {

		{

			.addr	= client->addr,

			.len	= sizeof(start_reg),

			.buf	= &start_reg,

		},

		{

			.addr	= client->addr,

			.flags	= I2C_M_RD,

			.len	= ts->read_buf_len,

			.buf	= ts->read_buf,

		}

	};

	int ret;

	int i;

	u8 *buf;

	error = i2c_transfer(client->adapter, msg, 2);

	if (error < 0)

		return error;

	ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));

	if (ret != ARRAY_SIZE(msg))

		return ret < 0 ? ret : -EIO;

	for (i = 0, y = 0; i < ts->chip_info->max_fingers; i++, y += 3) {

		finger[i].is_valid = buf[i + y] >> 7;

	for (i = 0; i < ts->chip_info->max_fingers; i++) {

		buf = &ts->read_buf[i * 4];

		finger[i].is_valid = buf[0] >> 7;

		if (finger[i].is_valid) {

			finger[i].x = ((buf[i + y] & 0x0070) << 4) |

					buf[i + y + 1];

			finger[i].y = ((buf[i + y] & 0x0007) << 8) |

					buf[i + y + 2];

			finger[i].x = ((buf[0] & 0x70) << 4) | buf[1];

			finger[i].y = ((buf[0] & 0x07) << 8) | buf[2];

			/* st1232 includes a z-axis / touch strength */

			if (ts->chip_info->have_z)

				finger[i].t = buf[i + 6];

				finger[i].t = ts->read_buf[i + 6];

		}

	}