On Tue, Nov 09, 2021 at 05:01:28PM +0800, LH.Kuo wrote:

Add devicetree bindings SPI Add bindings doc for Sunplus SP7021

Please submit patches using subject lines reflecting the style for the
subsystem, this makes it easier for people to identify relevant patches.
Look at what existing commits in the area you're changing are doing and
make sure your subject lines visually resemble what they're doing.
There's no need to resubmit to fix this alone.

+  reg:
+    items:
+      - description: Base address and length of the SPI master registers
+      - description: Base address and length of the SPI slave registers
+
+  reg-names:
+    items:
+      - const: spi_master
+      - const: spi_slave

What exactly is the physical overlap between the two controllers - is it
just the pinmux?