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spi: microchip-core-qspi: set min_speed_hz during probe

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The controller's minimum possible bus clock is 1/30 the rate of the
input clock. Naively set the minimum bus clock speed the controller
is capable of during probe, assuming that the rate will never reduce
further.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20250620-drained-widen-ac311bd5f172@spud
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Conor Dooley 2025-06-20 14:28:24 +01:00 committed by Mark Brown
parent 86731a2a65
commit 76f03ce1c6
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drivers/spi/spi-microchip-core-qspi.c
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@ -562,6 +562,7 @@ static int mchp_coreqspi_probe(struct platform_device *pdev)
ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_RX_DUAL | SPI_RX_QUAD |
SPI_TX_DUAL | SPI_TX_QUAD;
ctlr->dev.of_node = np;
ctlr->min_speed_hz = clk_get_rate(qspi->clk) / 30;
ret = devm_spi_register_controller(&pdev->dev, ctlr);
if (ret)