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Sheikh Faisal
e73b5f91a3
Currently, sysupgrade silently fails to erase or write to the SPI-NAND
flash on the JioRouter AX6000. This is caused by the SPI pinctrl group
mistakenly using `bias-disable`, which leaves the flash chip's hardware
HOLD and Write Protect (#WP) pins floating.
When combined with an upstream kernel regression that accidentally
arms the #HOLD function on Winbond W25N0xKV chips, these floating pins
drop low (often exacerbated by UART noise). This pauses the chip and
causes all flash operations to silently fail while returning success.
Fix this by properly configuring `bias-pull-up = <MTK_PUPD_SET_R1R0_11>`
for `SPI2_CS`, `SPI2_HOLD`, and `SPI2_WP`, ensuring the flash chip
remains electrically unpaused and unlocked. Additionally, apply
`bias-pull-down` to the clock and data lines to match MediaTek reference
designs.
Signed-off-by: Sheikh Faisal <sheikhfaisal713@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/25122
(cherry picked from commit 817b17cc34)
Link: https://github.com/openwrt/openwrt/pull/25095
Signed-off-by: Jonas Jelonek <jonas@jonasjelonek.de>