[PATCH] arch/riscv/dts: Fix uart reg-shift on fu540/fu740 SiFive devices

[Alexander von Gluck IV]

January 23, 2023 8:08 PM, "Alexander von Gluck IV" <kallisti5 at unixzen.com> wrote:
> * Not specifying reg-shift creates a situation where the register
> shift is unknown and can only be decoded via special compat
> cases.
> * The device tree specification states:
> "...reg-shift. If unspecified, the default value is 0."
> https://devicetree-specification.readthedocs.io/en/latest/chapter4-device-bindings.html
> * Since the reg-shift for the SiFive boards is *NOT* 0, it shall
> be defined as 2

Groan, ignore this patch.

I misread somewhere that the sifive,uart0 
was 8250 compatible.  It is not, and doesn't use any kind of shift other than
registers fitting into struct of unions.

I'm herding too many cats.

 -- Alex