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The CSI IP found inside the Renesas RZ/V2M SoC can also work in SPI target mode. When working in target mode, the IP will make use of the SS (Slave Selection) pin, with "low" as default active level. The active level of SS can be changed to "high" upon setting property "spi-cs-high" to true. By default, the SS will be used in target mode, unless property "renesas,csi-no-ss" is set to true, in which case data will be shifted in and out purely based on clock activity, and the logic level of the SS pin will be completely ignored. Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230927162508.328736-2-fabrizio.castro.jz@renesas.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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