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Measured discharge time on this board is ~632.97ms to > > > reach < 0.5V threshold. > > > > > > During boot, MMC power cycles between boot stages. Without power off > > > delay, VDD doesn't fully discharge. Card retains 1.8V signaling state > > > from previous stages. When U-Boot initializes, card no longer asserts > > > S18A in ACMD41 response (already switched to 1.8V). Host misinterprets > > > card state and forces 1.8V anyway, falling into a bad state and causing > > > a boot failure. > > > > > > Add power-off-delay-us = 650000 (650ms) to ensure proper VDD discharge > > > during power cycles, allowing card to fully reset state between boot > > > stages. > > > > > > Signed-off-by: Judith Mendez > > > > Fixes ? > > Fix is really for u-boot, don't think I can point to a u-boot > commit here can I? You'd face the same problem if you are starting from a different boot media and then enable MMC in linux kernel, right? what was described in the patch sounds like a discharge latency of the evm. This was missed in the original commit? -- Regards, Nishanth Menon Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3 1A34 DDB5 849D 1736 249D https://ti.com/opensource