This commit implements a workaround that allows ESP32-C5 to run at 240MHz CPU frequency
normally, while automatically reducing CPU frequency during encrypted flash writes to
ensure correct operation. The frequency limit is chip revision dependent:
- v1.2 and above: limited to 160MHz during encrypted writes
- v1.0 and below: limited to 80MHz during encrypted writes
Key implementation details:
- Frequency limiting is triggered automatically when esp_flash_write_encrypted() is called
- Uses start() flags (ESP_FLASH_START_FLAG_LIMIT_CPU_FREQ) to integrate with OS layer
- Works with both PM enabled and disabled configurations
- Frequency is automatically restored after encrypted write completes
- For ESP32-C5 with 120MHz flash, Flash clock and timing registers are adjusted when
CPU frequency is reduced to 80MHz
- SPI1 timing registers are configured during frequency switching since encrypted writes
use SPI1 and must work correctly at reduced CPU frequencies
Code improvements:
- Use SOC_MSPI_FREQ_AXI_CONSTRAINED capability macro instead of hardcoded chip checks
- Control workaround via Kconfig (CONFIG_PM_WORKAROUND_FREQ_LIMIT_ENABLED) instead of
hardcoded macros
- Add comprehensive test cases covering various PM configurations and edge cases
This workaround enables ESP32-C5 applications to benefit from 240MHz CPU performance
while maintaining reliable encrypted flash write functionality.
psram: xip_psram support on c5/c61, also fixed cache writeback/invalidate not work issue on c61
Closes IDF-8688, IDF-9292, and IDF-11008
See merge request espressif/esp-idf!33265
test(esp_flash): Enable test for spi_flash component for c61/c5/p4
Closes IDF-10313, IDF-8715, IDF-9314, IDF-10991, and IDF-8985
See merge request espressif/esp-idf!33238
While returning virtual address for existing memory mapped region, newly
supplied offset from the physical address was not getting considered.
This was a regression present from ESP-IDF 5.1 release.
Added test case in spi_flash component that fails without this fix.
Closes https://github.com/espressif/esp-idf/issues/13929
morris