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RP23XX_FLASH_MTD_OFFSET and RP23XX_FLASH_MTD_SIZE come from Kconfig. If the region ends past the end of the flash, the flash wraps the address around, and an erase or program hits the start of the flash, where the NuttX image is. For example, a 4M region at 1M does not fit on the 4M flash of a Raspberry Pi Pico 2. Read the JEDEC ID at initialization, in QMI direct mode as the Pico SDK flash_do_cmd() does, and refuse a region that does not fit. The capacity byte is log2 of the size in bytes. If the ID does not look valid, warn and do not check. Assisted-by: Claude Code:claude-opus-5-5 Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com> |
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