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dt-bindings: lpspi: New property in document DT bindings for LPSPI

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Add "fsl,spi-only-use-cs1-sel" to fit i.MX8DXL-EVK.
Spi common code does not support use of CS signals discontinuously.
It only uses CS1 without using CS0. So, add this property to re-config
chipselect value.

Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
Link: https://lore.kernel.org/r/20200727031513.31774-1-xiaoning.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Clark Wang 2020-07-27 11:15:13 +08:00 committed by Mark Brown
parent 4294e4accf
commit 7ac9bbf6ab
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7
Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml
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@ -34,6 +34,12 @@ properties:
- const: per
- const: ipg
fsl,spi-only-use-cs1-sel:
description:
spi common code does not support use of CS signals discontinuously.
i.MX8DXL-EVK board only uses CS1 without using CS0. Therefore, add
this property to re-config the chipselect value in the LPSPI driver.
required:
- compatible
- reg
@ -57,4 +63,5 @@ examples:
<&clks IMX7ULP_CLK_DUMMY>;
clock-names = "per", "ipg";
spi-slave;
fsl,spi-only-use-cs1-sel;
};