Re: [PATCH v2 1/3] dt-bindings: net: dsa: nxp,sja1105: make spi-cpol optional for sja1110

Conor Dooley
2026-04-09T15:36:21Z

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On Thu, Apr 09, 2026 at 02:34:33PM +0200, Josua Mayer wrote:
> Currently, the binding requires 'spi-cpha' for SJA1105 and 'spi-cpol'
> for SJA1110.
>
> However, the SJA1110 supports both SPI modes 0 and 2. Mode 2
> (cpha=0, cpol=1) is used by the NXP LX2160 Bluebox 3.
>
> On the SolidRun i.MX8DXL HummingBoard Telematics, mode 0 is stable,
> while forcing mode 2 introduces CRC errors especially during bursts.
>
> Drop the requirement on spi-cpol for SJA1110.
>
> Fixes: af2eab1a8243 ("dt-bindings: net: nxp,sja1105: document spi-cpol/cpha")
> Signed-off-by: Josua Mayer <josua@solid-run.com>

Acked-by: Conor Dooley <conor.dooley@microchip.com>

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