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rp2040: Only change SPI settings while peripheral is disabled 

Make sure to disable/enable the peripheral to ensure the clock
polarity is properly set prior to a change in CS.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2024-01-22 12:55:22 -05:00
parent f1982edcd5
commit 5e433fff06
1 changed files with 4 additions and 0 deletions
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4
src/rp2040/spi.c
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@ -89,8 +89,12 @@ void
spi_prepare(struct spi_config config) spi_prepare(struct spi_config config)
{ {
spi_hw_t *spi = config.spi; spi_hw_t *spi = config.spi;
if (spi->cr0 == config.cr0 && spi->cpsr == config.cpsr)
return;
spi->cr1 = 0;
spi->cr0 = config.cr0; spi->cr0 = config.cr0;
spi->cpsr = config.cpsr; spi->cpsr = config.cpsr;
spi->cr1 = SPI_SSPCR1_SSE_BITS;
} }
void void