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spi_setfrequency() in pic32mz_spi.c rounded the baud rate divisor down, so the SCK frequency could be higher than the one requested by the device driver (e.g. 20 MHz requested with a 100 MHz PBCLK2 gave 25 MHz). A request above PBCLK/2 gave a zero divisor and a division by zero when computing the actual frequency; the SST26 driver's default of 64 MHz does that with any peripheral bus clock below 128 MHz. Round the divisor up instead, so the actual frequency never exceeds the requested one and the divisor is never zero. Boards whose requested frequency is not an exact divisor of PBCLK/2 now run SPI at a lower clock than before. Assisted-by: Claude Code:claude-opus-5-5 Signed-off-by: Daniel P. Carvalho <danieloak@gmail.com> |
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