MTK SPI FIFO

From: Mori Hiroki <yamori813_at_yahoo.co.jp>
Date: Wed, 06 Dec 2023 22:24:52 UTC
Hi

I add SPI FIFO support at MT7620.

https://github.com/ZRouter/freebsd-src/tree/zrouter_yamori813/sys/mips/mediatek

mtk_spi_v3.c

boot time benchmark.
v1 is 42 sec.
v3 is 36 sec.

Hiroki Mori