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spi: microchip-core-qspi: fix setting spi bus clock rate 

Before ORing the new clock rate with the control register value read
from the hardware, the existing clock rate needs to be masked off as
otherwise the existing value will interfere with the new one.

CC: stable@vger.kernel.org
Fixes: 8596124c4c ("spi: microchip-core-qspi: Add support for microchip fpga qspi controllers")
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Link: https://lore.kernel.org/r/20240508-fox-unpiloted-b97e1535627b@spud
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Conor Dooley 2024-05-08 16:46:51 +01:00 committed by Mark Brown
parent 52b62e7a5d
commit ef13561d2b
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1 changed files with 1 additions and 0 deletions
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drivers/spi/spi-microchip-core-qspi.c
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@ -283,6 +283,7 @@ static int mchp_coreqspi_setup_clock(struct mchp_coreqspi *qspi, struct spi_devi
}
control = readl_relaxed(qspi->regs + REG_CONTROL);
control &= ~CONTROL_CLKRATE_MASK;
control |= baud_rate_val << CONTROL_CLKRATE_SHIFT;
writel_relaxed(control, qspi->regs + REG_CONTROL);
control = readl_relaxed(qspi->regs + REG_CONTROL);