" .name = "dw-mipi-dsi","

Looks like a string in the structure to me. And when you have an array of such structures, you end up scanning through them checking for the name you need.

That's the name of the regmap. Clicking through to the definition of the structure says it's optional and thus there for descriptive purposes.

     *
     * @name: Optional name of the regmap. Useful when a device has multiple
     *        register regions.

Look at the usage example a couple of lines below; it's passing a pointer to that structure. There's no scanning necessary, it already knows where the structure is.