>>2594183There's no direct analogous processes for split-grade on photoshop.
As I only process digitalized negs, I don't need to do much on photoshop, so a layer on Lighten (for the whites) and a layer on Overlay (for the blacks), are usually enough.
Raw files are much blander the scanned negs, so I guess luminosity masks would be nice, combined with lighten/overlay.
It is good to notice that Salgado (over)done a lot of HDR when began shooting digital (pic related). So be cautious.