Sky Huang 058bd6c9d3 mediatek: filogic: mt7986: fix SPI driving for NAND and increase to 52MHz on ZyXEL EX5601 ... 8mA driving will cause overshoot issue on SPI NAND. Change it to 4mA. - Reference: 003744197a On Linux mainline (mt7986.dtsi), spi's source clock is: clocks = <&topckgen CLK_TOP_MPLL_D2>, which is 208MHz. Usable clock division will be: - 208/4=52MHz - 208/6~=35MHz - 208/8=26MHz and so on If we specify 50MHz for spi-max-frequency, it will actually run under about 35MHz. Most SPI NAND & NOR flashes are capable of running with more than 52MHz, include Micorn MT29F4G01ABAFDWB on ZyXEL EX5601. [Ref: #18752] To reach highest performance on mt7986, use spi-max-frequency = <520000000>. Basically, this setting should work on all mt7986 PCBs since most mt7986 boards follow reference design. However, other boards needs further test to guarantee stability. Signed-off-by: Sky Huang <SkyLake.Huang@mediatek.com> Tested-by: Aleksander Jan Bajkowski <olek2@wp.pl> Link: https://github.com/openwrt/openwrt/pull/18813 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>		2025-07-13 17:04:06 +02:00
..
imagebuilder	imagebuilder: implement STRIP_ABI option for manifest target	2025-07-03 12:45:59 +02:00
linux	mediatek: filogic: mt7986: fix SPI driving for NAND and increase to 52MHz on ZyXEL EX5601	2025-07-13 17:04:06 +02:00
llvm-bpf	build: use zstd for IB, toolchain, SDK and LLVM compression	2024-04-13 08:05:04 +02:00
sdk	build: fix building llvm tarball	2025-02-10 22:10:50 +01:00
toolchain	build: use zstd for IB, toolchain, SDK and LLVM compression	2024-04-13 08:05:04 +02:00
Config.in	image: add support for EROFS rootfs image generation	2025-07-05 15:24:54 +02:00
Makefile	build: add $(STAGING_DIR) and $(BIN_DIR) preparation to target and package subdir compile dependencies	2024-03-03 23:13:59 +01:00