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rp2/rp2_flash: Add default MICROPY_HW_FLASH_MAX_FREQ.

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Set a default MICROPY_HW_FLASH_MAX_FREQ if PICO_FLASH_SPI_CLKDIV
is unset.

Use a divider of 4, which is the default in boot2_generic_03h.S.

Signed-off-by: Phil Howard <github@gadgetoid.com>
This commit is contained in:
Phil Howard
2025-06-17 14:55:25 +01:00
parent b725c26b4e
commit dc8daad3c9
1 changed files with 5 additions and 0 deletions
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5
ports/rp2/rp2_flash.c
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@@ -54,7 +54,12 @@ static_assert(MICROPY_HW_FLASH_STORAGE_BYTES % 4096 == 0, "Flash storage size mu
// On RP2040 if PICO_USE_FASTEST_SUPPORTED_CLOCK is set then SYS_CLK_HZ can be
// 200MHz, potentially putting timings derived from PICO_FLASH_SPI_CLKDIV
// out of range.
#ifdef PICO_FLASH_SPI_CLKDIV
#define MICROPY_HW_FLASH_MAX_FREQ (SYS_CLK_HZ / PICO_FLASH_SPI_CLKDIV)
#else
// A default PICO_FLASH_SPI_CLKDIV of 4 is set in boot2_generic_03h.S
#define MICROPY_HW_FLASH_MAX_FREQ (SYS_CLK_HZ / 4)
#endif
#endif
#ifndef MICROPY_HW_FLASH_STORAGE_BASE