gs_read_register
ret = gs_read_register(spi, reg->reg & 0xFFFF, &val);
gs_read_register(gs->pdev, REG_LINES_PER_FRAME + i, ®_value);
gs_read_register(gs->pdev, REG_STATUS, ®_value);
ret = gs_read_register(gs->pdev,
ret = gs_read_register(gs->pdev, REG_STATUS, ®_value);